This Page Updated:

In as much as the designs and circuits on these PSK Interface Home pages have been tested, Buck Rogers K4ABT, assumes no responsibility for safety, operation, or application of information contained herein.


Transceiver to Sound Card Interface Diagrams by BucK4ABT


What is PSK31?

As the name implies, PSK (phase shift keying) modulates the phase of a carrier, and the number ''31'' references the actual bandwidth (31 Hz) occupied by the PSK31 signal.
Phase modulation has more advantages than CW. CW uses amplitude (On/Off) keying. In a noisy or distorted propagation environment, the amplitude of a signal will shift and vary much more than the phase of a signal.
The baudrate used by PSK31 is 31.25 baud. It is intended as a means of keyboard to keyboard communication (about 50 wpm) between two or more operators using a very small frequency spectrum.
When compared to CW, PSK31 is a much better operating mode. By comparing the small bandwidth of PSK31 and measuring its gain against a CW filter of 500 Hz; 10 * log (500/31) dB = 12 dB, quickly reveals that a CW transmitter must put out 15 to 18 times more power than a PSK31 transmitter, to achieve the same signal to noise ratio at the PSK31 receiving station. This is the reason the PSK31 operating mode has gained so much popularity in such a short time. The end result is that a HAM can operate with reduced power and smaller antenna installations. For example; My 20 meter, 14.070 MHz (USB), PSK31 antenna, is located in the attic of my garage (about 14 feet above ground)

73 de BucK4ABT

As an unwritten rule, most PSK31 contacts are made using upper sideband (USB). Look for PSK stations around 3.5800 MHz, 7.070/035 MHz, 14.070 MHz, 21.070 MHz or 28.070 MHz. Most PSK31 programs default to BPSK. As you become familiar with PSK, you may wish to experiment with "QPSK", but for now, use only BPSK.

CAVEAT ! Most interfaces shown on these pages, were tried and tested in on-the-air-operation.... HOWEVER!...I am NOT responsible for errors, ommissions, or mistakes! PROCEED AT YOUR OWN RISK! Parts kits associated with these interfaces are sold as a parts source for these interfaces. No further claims are made as to the use and/or application of these part kits.
NOTICE!!! If you are unable to read a ''pictorial diagram, or schematic'' shown on this page, OR if your Sound card is not 'Sound Blaster' compatible, DO NOT purchase any ISO-KIT shown below. No return and no refund on kits.
Parts and components shown in the diagrams on this page can be purchased separately ... CLICK HERE !
OR... If you just want to have fun... then go, the ''Plug-N-Play'' way with;
BUX CommCo   Lil  * "RASCAL"    TM ®
*("Radio And Sound Card Audio Link")


1 = Transmit audio (coarse) level adjust.
2 = Transmit ON-AIR indicator.
3 = Receive Audio (Ext Spkr).
4 = To Transceiver MIC or Data port (connector type depends on transceiver data I/O port).
5 = Sound Card ''OUT''
6 = Sound Card ''IN''
7 = To RS-232 comport for ''Automatic Tx/Rx PTT'' control via PSK31 software.

The  *RASCAL    PSK31 interface is complete with all input and output (I/O) connectors and plugs ........ NO, you don't have to trek to the parts house to buy additional cables or connectors, they're included!

The PC Sound Card and RS-232 comport (used for automatic PTT), is ISOlated from the transceiver by special transformers designed for this purpose. The LINE IN and LINE OUT, to and from the PC sound card, provide a higher degree of immunity from potential ground loops and RF feedback. A level control is provided to adjust the audio to the transceiver.

No wall-wart, or external transformers are needed, which makes
the "RASCAL" ideal for portable and field-day operations.
The "RASCAL" can easily be used with portable computers.
The "RASCAL" KIT is $25.00 (Includes: Case, Cables Connectors, and USA shipping)

Some "RASCAL" are available WIRED. When placing an order for the ''WIRED'' version, be sure to check the correct box on the order form, and include the kit Order Number.

Assembled/Wired price is; $49.00 USA. Includes shipping and case shown in the above photo.
Click Here for BUX CommCO ISO-KIT order form.

Because no external power is required the "RASCAL" is easy to interface with a laptop computer. NOTE; Insure that your laptop sound card is compatible with the Creative Labs TMSound-Blaster.
Foriegn ISO-kits listed above, assembled; $49.00 plus $20.00 Par-Avion,
Total = $69.00s for foriegn shipping and handling.

BUX CommCo
115 Luenburg Drive
Evington, VA 24550

Make Checks or Money Orders payable to: BUX CommCo
24/7, FAX (804) 525 7818
We Accept; DISCOVER,VISA,and MasterCard .
Shipping NOTICE For Small Parts orders, Add $7.00 Shipping VIA Priority U S Mail
For Antennas, and Radio Transceiver orders; Add $15.00 UPS Shipping and Handling

ISO-KIT and "RASCAL" are ® TM and © 1999-2001, BUX CommCo
 * RASCAL    "Radio And Sound Card Audio Link"

PLEASE READ THE FOLLOWING:
All parts and components shown in the diagrams below are included in each ISO-KIT.
This includes:
  • A full page, large, legible, AutoCad (original) hardcopy drawing of your interface.
  • 3.5 mm sound card interface connectors with leads attached, opto-couplers/PhotoTransistors, IC socket, transformers, capacitors, resistors, hook-up wire, and solder.
  • If the ISO-KIT (diagram) calls for an external speaker connector, it is included in your ISO-KIT.
  • Microphone, or accessory port connector. (this includes the 'hard-to-find' 6 pin MINI-DIN, 7 pin DIN, 8 pin DIN, and 13 pin DIN accessory plugs), for Alinco, ICOM, KENWOOD, and YAESU transceivers. For DRAKE, and TenTEC transceivers, a 1/4 inch stereo (3 circuit) connector is included.
  • In short, every component you need to build your ISO-KIT interface, ready to plug-N- play is included in each ISO-KIT! All you provide are the hand-tools, solder, and soldering iron.
    All in all, it's an evenings fun that you will enjoy for countless, hours of PSK31, SSTV, RTTY, ASCII, AMTOR, Packet and other modes that are now possible using a Creative LabsTM compatible sound card.

    Once completed, you have the PSK31, RTTY, and SSTV interface that you can be proud to tell others that you home-brewed. NO OTHER PC to SOUND CARD INTERFACE OFFERS ALL THIS FOR $25 dollars!

    My goal is NOT to sell an interface parts kit, but to help all hams get into PSK31, as I feel that PSK31 is one of the most attractive and enjoyable digital modes I've yet to witness in over 55 years as a HAM. PSK31 is truly a mode that enables HAMS to communicate one on one, as well as in round-tables, using nothing more than your PC sound card, this simple interface, and your transceiver, be it HF SSB or VHF/UHF FM.     

    


    When Operating PSK31 on HF:
    

Most all HF transceivers are NOT rated for 100% duty cycle, 
and PSK31 is a KEY DOWN mode.  
	° Don't use the audio speech processor, turn it OFF.
	° Don't use the transceiver VOX circuit to key the transmitter.
	° Don't run full RF output power, adjust output level to 
	  less than half power!
    CLICK HERE to read the Sound Card 'setup' for PSK31 software and ISO interface procedures.

    • Construction takes approximately one hour for the experienced HAM, and a couple of hours for those who are less experienced soldering.

    ALL cables, connectors, and parts shown in the diagrams below are included in the ISO-KITS.
    ISO-KITS are $25.00 each. The High-Impact (ABS) Case is included with each kit.
    TOTAL cost of the ISO-KIT, case, and USA Priority Mail shipping is $25.00.
    FAX ORDERS ARE SHIPPED WITHIN 24 HOURS FROM TIME RECEIVED,
    Exception; FAX Orders received on Saturdays, or Holidays will not be shipped until next postal delivery/pickup day.

    Parts and components shown in the diagrams on this page are available HERE !

      PSK31 ''HF'' TRANSCEIVER INTERFACE DIAGRAMS
      For PSK31, RTTY, CW, FAX, SSTV
      and other Digital and Analog applications.
      ALINCO

    1. This is a NEW PSK31 interface release for the ALINCO DX-70.
      This interface does not use the 3.5mm external speaker jack. Instead, receive audio is extracted from the ''fixed'' level AF that is available from pin six of the ALINCO DX-70 8 pin (screw-on) MIC port.

      ORDER;    ISO-AL6A KIT                  (Total kit price $25.00).
      ORDER;    ISO-AL6A-WIRED   assembled and tested (Total price $49.00).
      CLICK HERE for BUX CommCO ISO Interface order form.

      (Note; this interface also works with some Kenwood transceivers that has receive audio at MIC port, pin 6.)


    2. ALINCO DX-70T HF Transceiver 8 pin (screw-on) mic to PC Sound Card configured for PSK31 BPSK, and QPSK modes.
      CLICK HERE to view diagram
      CLICK HERE to order ISO-KIT-1 /AL
      Be sure to show ''order number'' on orderform.

      COLLINS
    3. COLLINS KWM-380 Transceiver with J2, J6, and J9 Phono plug I/O Accessory ports to PC Sound Card configured for PSK31 and other digital modes. Please note; This interface utilizes transformer coupling and opto-isolator PTT to provide a greater level of RF immunity and isolation. The circuit enables software calls to comport RTS for PTT execution.
      CLICK HERE to view diagram
      CLICK HERE to order Order Number 75767
      Be sure to show ''order number'' on orderform.

      DRAKE
    4. R. L. DRAKE company's TR-4, TR-4C, TR-4CW, and TR-6 radios to PC Sound Card configured for PSK31 and other digital modes. Please note; SwitchCraft 230 (Collins) type 3-circuit MIC plug is NOT supplied with the ISO-kit. ONLY the 1/4 inch Stereo plug is supplied! The PTT circuit shown in this diagram enables software calls to RTS signal of an unused serial comport.
      CLICK HERE to view diagram
      CLICK HERE to order Order Number TT25S
      Be sure to show ''order number'' on orderform.

    5. The DRAKE TR7 . The TR-7 or TR-7/A, uses the standard 4 pin screw on female mic connector. The PTT circuit shown in this diagram enables software calls to RTS signal of an unused serial comport.
      CLICK HERE to view diagram
      CLICK HERE to order ISO-KIT-TR7A
      Be sure to show ''order number'' on orderform.

    6. The DRAKE TWINS (R-4B and T4XB) by R. L. DRAKE company, radio to PC Sound Card configured for PSK31 and other digital modes. Please note; SwitchCraft 230 (Collins) type 3-circuit MIC plug is NOT supplied with the ISO-kit. ONLY the 1/4 inch Stereo plug is supplied! . The PTT circuit shown in this diagram enables software calls to RTS signal of an unused serial comport.
      CLICK HERE to view diagram
      CLICK HERE to order Order Number TT25S
      Be sure to show ''order number'' on orderform.

      ICOM
    7. ICOM HF - VHF Transceivers with 8 pin DIN Accessory ACC(1) connector to PC Sound Card configured for PSK31; BPSK, and QPSK and other digital modes. Please note that this interface utilizes transformer coupling, and optocoupler Phototransistor for software control of PTT.
      ICOM Models IC-275, IC-375, IC-575, IC-707, IC-721, IC-723, IC-725, IC-726, IC-728, IC-729, IC-732, IC-735, IC-736, IC-737, IC-737A, IC-738, IC-746, IC-751, IC-756, IC-760, IC-761, IC-765, IC-775DSP, IC-781, IC-820, IC-970 etc..
      CLICK HERE to view diagram
      CLICK HERE to order Order Number, RASCAL 5
      Be sure to show ''order number'' on orderform.

      Some hard to find parts for your PSK31, and SSTV interface projects may be found here.
    8. ICOM Transceivers with 13 pin DIN data I/O port... for ICOM HF/VHF Transceivers; This circuit employs an Opto-Coupler (phototransistor), and transformer coupling to isolate the Sound Card from the transceiver (RF). ICOM HF / VHF Transceivers with 13 pin DIN (ACC) connector to PC Sound Card configured for PSK31 and SSTV modes. NOTE; This interface utilizes the serial comport RTS signal to enable Push-To-Talk (PTT).
      CLICK HERE to view diagram
      * Be sure to read notes on drawing, reference executing PTT for HF and/or VHF.
      CLICK HERE to order Order Number, IC13PD
      Be sure to show ''order number'' on orderform.

    9. For the ICOM, IC-706, and IC-706MKII, The most popular of all IC-706 PSK, SSTV and PacketBlasterTM© interfaces.
      This interface also works with the IC-751, and similar ICOM HF/VHF Transceivers equipped with 13       pin DIN ''ACC(1)'' connector to PC Sound Card configured for PSK31, and other digital modes. NOTE that this interface also works with the new ''PacketBlaster'' Sound Blaster compatible sound card program (No need for a TNC). This this interface utilizes transformer coupling and enables software PTT execution via serial comport RTS signal. ICOM models 706 etc...
      CLICK HERE to view diagram

      CLICK HERE to order Order Number, 706-13
      Be sure to show ''order number'' on orderform.


    10. Six pin mini DIN data port for the 706 MK II G, HF transceiver: Using an Opto-Coupler (phototransistor), and transformer coupling provides total isolation between the transceiver Data Port I/O and the PC Sound Card. This circuit may also be suitable for other ICOM HF/VHF transceivers equipped with the 6 pin mini-DIN Data jack for PSK31 Be sure to read the setup notes at the bottom of the drawing for configuration of the Data Socket/port.
      CLICK HERE to view diagram
      CLICK HERE to order Order Number, 706MDIN
      Be sure to show ''order number'' on orderform.

    11. ICOM IC-706, 207, 281, 381, 481, 2000, 2350, 2340, and similar ICOM HF, VHF, and UHF transceivers. This PSK31/SSTV interface uses the 4N25/PS2601, Opto-Coupler (phototransistor), and transformer coupling to isolate the Sound Card from the transceiver (RF). ICOM HF/VHF transceivers with 8 pin RJ-45 microphone connector to PC Sound Card for PSK31 mode. Read the (C*) notes on diagram.
      CLICK HERE to view diagram
      CLICK HERE to order Order Number, 706RJ45
      Be sure to show ''order number'' on orderform.

    12. ICOM IC-730 and similar HF-VHF Transceivers with 8 pin screw-type standard microphone connector to PC Sound Card configured for PSK31, and other digital modes. NOTE notice that this interface utilizes transformer coupling and enables PTT execution via serial comport RTS signal.
      ICOM models IC-120, IC-1201, IC-1271, IC-1275, IC-228, IC-22U, IC2400, IC-25, IC-2500, IC-255, IC-260, IC-27, IC-271, IC-275, IC-28, IC-290, IC-3200, IC-3210, IC-3220, IC-375, IC-37A, IC-38A, IC-45, IC-47, IC-471, IC-475, IC-48, IC-490, IC-505, IC-551, IC-560, IC-575, IC-707, IC-720, IC-725, IC-726, IC-728, IC-729, IC-730, IC-735, IC-737, IC-740, IC-745, IC-751, IC-761, IC-765, IC-781, IC-901, etc... Be sure to read note on drawing regarding bias blocking cap. See Note (*C).
      CLICK HERE to view diagram
      CLICK HERE to order Order Number, 1/IC
      Be sure to show ''order number'' on orderform.

      KACHINA
    13. KACHINA 505 DSP, HF Transceiver with DB25, 25 pin (female) connector (ACC1) DataPort to PC Sound Card configured for PSK31, and other digital modes. NOTE that this interface utilizes transformer coupling and enables software calls to the PC serial comport RTS signal to execute PTT. Wire interface cable (transceiver end) using a DB25 'male' connector.
      CLICK HERE to view diagram
      CLICK HERE to order Order Number, K505DSP
      Be sure to show ''order number'' on orderform.


      KENWOOD

    14. KENWOOD HF Transceivers (TS series = 120, 130, 180, 520, 530, 600, 700, 770, 820, 830, and others) with 4 pin microphone connectors, to PC Sound Card. This circuit is designed to prevent RF feedback by using transformer and opto-coupler isolation.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, KW4PM
      Be sure to show ''order number'' on orderform.


    15. KENWOOD HF Transceivers (TR series = 7700, 7730, 7750, 8400, 7800, 7930, 7950, 9000, 9030, 9300, 9500 etc..., and others) with 6 pin ''Standard'' microphone connector, to PC Sound Card. This circuit is designed to prevent RF feedback by using transformer and opto-coupler isolation.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, KW6PM
      Be sure to show ''order number'' on orderform.

    16. KENWOOD HF Transceivers (TM-201, 221, 231, 241, 2530, 401, 421, 431, 441, 531, 541, 621, 631, 721, 731, TR-3200, 50, 751, 851, TS-140, 430, 440, 450, 670, 680, 690, 701, 711, 780, 790, 811, 850, 930, 940, 950, TW-4000, 4100, and others), with 8 pin Screw-On type microphone port to SB16 Sound Card. This interface uses transformer audio coupling and PhotoTransistor, Opto-Coupler (PTT) for RF isolation.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 1/KW
      Be sure to show ''order number'' on orderform.

    17. KENWOOD HF Transceivers with 13 pin DIN data I/O port; (TS-140, TS-450, TS-570, TS-680, TS-690S, TS-790, TS-850, TS-870, and TS-950..etc) with 13 pin DIN (ACC2) connector to PC Sound Card. This circuit is designed to prevent RF feedback by using transformer and opto-coupler isolation.
      (* A few Kenwood transceivers may require pin 13 of ACC2 for PTT, instead of pin 9, see next diagram (ISO-KW40-13). !)
      CLICK HERE to view diagram
      CLICK HERE to Order Number, KW13PD
      Be sure to show ''order number'' on orderform.

    18. KENWOOD HF, VHF, and UHF Transceivers that use pin 13 for PTT execution; TS-440*, TS-711*, TS-811*, and TS-940*. This is a 13 pin DIN female jack, labeled as ACCY2. This circuit diagram addresses only these specific Kenwood (vintage) transceivers. The associated kit performs the function of interfacing PSK31 signals to/from the transceiver while ISOlating the radio and PC sound card I/O. By using transformer and opto-coupler ISOlation, RF feedback and noise is reduced to a minimum.
      CLICK HERE to view diagram

    19. This interface for the KENWOOD HF Transceivers with 8 pin MIC connector is designed to execute a PTT software call using RTS. For ALINCO and KENWOOD 8 pin MIC to PC Sound Card for; PSK31, and other digital modes.
      CLICK HERE to view diagram
      CLICK HERE to order Order Number, AL-KW
      Be sure to show ''order number'' on orderform.

    20. Some KENWOOD TS-440 and similar Kenwood HF Transceivers with 8 pin screw-type MIC connector to PC Sound Card configured for PSK31; and other digital modes.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 1/KW
      Be sure to show ''order number'' on orderform.


      Radio Shack HF Transceiver


    21. Late Model Radio Shack HTX-10, Ten Meter HF, SSB/FM/AM transceiver interfaced to the PC sound card for PSK31, Packet, and SSTV modes.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, ''RASCAL HTX10''
      Be sure to show ''order number'' on orderform.

      RANGER
    22. RANGER 10 meter HF Transceiver with 8 pin screw-type MIC connector to PC Sound Card configured for PSK31; BPSK, and QPSK and other digital modes. NOTE; Receive AF is via the external speaker jack. NOTE: When ordering ISO KITS, please include the make and model of the transceiver that the kit is for.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, AR25008P
      Be sure to show ''order number'' on orderform.

      SGC

    23. This is a NEW PSK31 interface release for the SGC model SG-2020.
      This interface does not use the 3.5mm external speaker jack. Instead, receive audio is extracted from pin six of the SG-2020, 8 pin (screw-on) MIC port.

      ORDER;     Number, SG2020 KIT                  (Total kit price $25.00).
      Order Number,    SG2020-WIRED   assembled and tested (Total price $49.00).
      CLICK HERE for BUX CommCO ISOlated Interface order form.

      Be sure to show ''order number'' on orderform.

      (Note; this interface also works with Kenwood transceivers that have receive audio at MIC port, pin 6.)

      Ten-Tec

    24. Ten-Tec PEGUSUS Transceivers with accessory connector to PC Sound Card configured for PSK31, SSTV, ; and other digital modes.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 1K990
      Be sure to show ''order number'' on orderform.

    25. Early Ten-Tec Argonaut 505, 509, 515, Omni V, and Ten-Tec HF Transceivers with 1/4 inch Stereo Mic I/O and 1/4 inch mono external speaker jack, to PC Sound Card configured for PSK31; BPSK, and QPSK and other digital modes. NOTE; Receive AF is 1/4 inch the external speaker jack.

      CLICK HERE to view diagram
      CLICK HERE to Order Number, TTAO
      Be sure to show ''order number'' on orderform.

    26. Ten-Tec HF Transceivers with 4 pin screw-type MIC connector (Paragon, Argonaut, Delta II, Scout, etc...) to PC Sound Card configured for PSK31; BPSK, and QPSK and other digital modes. NOTE; Receive AF is via the external speaker jack.
      READ NOTE on drawing reference adding PTT buffer to Opto-Coupler to handle T/R relay currents above 60mA. The 2N3053 PTT buffer transistor is included with each ISO-KIT-TT4P interface kit.

      CLICK HERE to view diagram
      CLICK HERE to Order Number, TT4P
      Be sure to show ''order number'' on orderform.

    27. Ten-Tec OMNI VI and similar transceivers with RCA jacks for ''Patch IN, Patch OUT, and PTT'' jacks. Diagram interface to PC Sound Card configured for PSK31; BPSK, and QPSK and other digital modes.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, TTOMNI
      Be sure to show ''order number'' on orderform.

    28. Ten-Tec, DRAKE, and other HF Transceivers with 1/4 inch stereo MIC connector to PC Sound Card configured for PSK31.; Please note; SwitchCraft 230 (Collins) type 3-circuit MIC plug is NOT supplied with the ISO-kit. ONLY the 1/4 inch Stereo plug is supplied! NOTE; Receive AF is via the external speaker jack.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, TT25S
      Be sure to show ''order number'' on orderform.

      UNIDEN
    29. UNIDEN HR-2510 and HR-2600 HF Transceivers with 5 pin screw-type MIC connector to PC Sound Card configured for PSK31; BPSK, and QPSK and other digital modes. NOTE; Receive AF is via the external speaker jack.
      CLICK HERE to view diagram
      CLICK HERE to order ISO-KIT-UHR5P
      Be sure to show ''order number'' on orderform.

      YAESU
    30. YAESU FT-102, FT-757 and FT-767 transceivers using the rear panel RCA jacks for PSK31 interfacing. This application uses transformer audio coupling and Opto coupler for PTT to PC Sound Card.
      CLICK HERE to view diagram
      CLICK HERE to Order Number 75767
      Be sure to show ''order number'' on orderform.

    31. YAESU FT-747 transceivers with the rear panel RCA phono External Speaker jack for receive audio. This application uses transformer audio coupling and Opto coupler for PTT to PC Sound Card.
      CLICK HERE to view diagram
      CLICK HERE to Order Number FT747
      Be sure to show ''order number'' on orderform.

    32. YAESU FT-100D and FT-817, transceiver using the rear panel 6 pin Mini DIN for PSK31 interfacing. This application uses transformer audio coupling and Serial comport to Opto coupler for PTT to PC Sound Card. By using this interface scheme, the transformers and optocoupler provide optimum RF isolation between radio and computer, and reduces CPU noise interference.
      CLICK HERE to view diagram
      CLICK HERE to Order Number FTMDIN
      Be sure to show ''order number'' on orderform.

    33. YAESU FT-1000D and FT-1000MP Transceiver PSK31 Interface using transformer audio coupling and Optoisolator for PTT to PC Sound Card. This interface provides better isolation and protection from RF feedback, and improved transmit audio level control. This RASCAL interface enables the use of both upper and lower sideband operation !
      CLICK HERE to view diagram
      CLICK HERE to Order Number, RASCAL 1000-D
      Be sure to show ''order number'' on orderform.

    34. YAESU FT-920, FT-990, FT-1000"D", and FT-1000MP (*LSB only!) Transceiver Interface diagram using the 5 pin DIN 'Packet and Data I/O ' Port to PC Sound Card. This interface enables of PSK31 with other YAESU radios having 5 pin DIN Data I/O ports. *Most YAESU FT-920, 990 and 1000 series will not operate upper-sideband PSK when using the 5 pin DIN in ''Packet mode.''
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 1K990
      Be sure to show ''order number'' on orderform.

    35. YAESU FT-847, diagram for the PSK31 circuit that is employed when interfacing the Yaesu FT-847 Data Jack to an SB16 sound card. NOTE; The PTT circuitry of this interface is activated via the Data IN (3.5 MM Plug '' TIP''). The value selected for the capacitor (3.3 uF) and the resistor (2.K or 2000 ohms) value are important. DO NOT change or omit either component.
      CLICK HERE to view diagram

    36. Yaesu FT-890 diagram for PSK31. This circuit is employed when interfacing the Yaesu FT-890 Data Jack to an SB16 sound card. It is very similar to the same scheme used to interface the FT-847 and FT-4600 transceivers. NOTE; The PTT circuitry of this interface is activated via the Data IN (3.5 MM Plug '' TIP''). The value(s) for ''C'' and ''R'' may vary slightly, however, both components are necessary, DO NOT omit either component.
      CLICK HERE to view diagram


      Be sure to show ''order number'' on orderform.
    37. Yaesu FT-900 diagram for PSK31. This circuit utilizes the PATCH-IN,and PTT RCA Phono jacks and the External Speaker for PSK31 interfacing to the PC Sound card. This interface diagram may also be used with similar Yaesu transceivers having similar jacks for data I/O.
      CLICK HERE to view diagram

    38. Yaesu FT-600 interface diagram for PSK31. This circuit is employed when interfacing the Yaesu FT-600 MIC jack to an SB16 sound card. The interface diagram may also be used with other Yaesu transceivers having similar input/output (I/O).
      CLICK HERE to view diagram
      CLICK HERE to Order Number, RASCAL FT600
      Be sure to show ''order number'' on orderform.

    39. Yaesu FT-2500 interface diagram for PSK31. This circuit is employed when interfacing the Yaesu FT-2500 MIC jack to an SB16 sound card. The interface diagram may also be used with other Yaesu transceivers having similar RJ-45 input/output (I/O) ports.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, RASCAL FT2500
      Be sure to show ''order number'' on orderform.

    40. Yaesu FT-840, FT-890 and FT-900 diagram for PSK31. This circuit is employed when interfacing the Yaesu FT-840 MIC jack to an SB16 sound card. This interface diagram may also be used with the FT-747 and 757 Yaesu transceivers, however, it may be necessary to extract receive audio from the ''external speaker'' jack.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 1/YA
      Be sure to show ''order number'' on orderform.

    41. Yaesu FT-77, FT-102, FT-707S, FT-747, FT-757, FT-767, FT-980, and FT-ONE-S, interface diagrams to PC Sound Card for PSK31 application. Most of these radios will require that receive audio be taken from the external speaker jack.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 1/YA
      Be sure to show ''order number'' on orderform.

    42. Yaesu FT-200, and TEMPO ONE interface diagram to PC Sound Card for PSK31 application. Receive audio is extracted from the RCA (phono type) external speaker jack.
      CLICK HERE to view FT200 diagram
      CLICK HERE to Order Number, FT200
      Be sure to show ''order number'' on orderform.

    43. Yaesu FT-2, FT-2F, FT-7, FT-101, FT-101Z, FT-107, FT-220, FT-221, FT-223, FT-224, FT-225, FT-227, FT-301, FT-501, FT-625, FT-901, FT-902, and most Yaesu transceivers with 4 pin MIC connector, interface diagrams to PC Sound Card for PSK31 application. Most of these radios will require that receive audio be extracted at the 3.5mm, external speaker jack.
      READ NOTE on drawing reference adding PTT buffer to Opto-Coupler to handle T/R relay currents above 60mA. The 2N3053 PTT buffer transistor is included with each ISO-KIT-FT4P interface kit.

      CLICK HERE to view diagram
      CLICK HERE to Order Number, FT4P
      Be sure to show ''order number'' on orderform.

    44. YAESU and KENWOOD Interface diagram for Transceivers equipped with 6 pin Mini DIN data ports. This interface enables the use of PSK31, RTTY, SSTV, Packet, etc... via the 6 pin, mini DIN data port. Be sure to set transceiver control for 1200 baud data port operation.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, FTMDIN
      Be sure to show ''order number'' on orderform.


      FAX ORDERS ARE SHIPPED WITHIN 24 HOURS FROM TIME RECEIVED.

      CLICK HERE to View, Step By Step, construction techniques I used when building a similar interface.
    45. CLICK HERE to view a universal PSK31 interface diagram that should fit most Sound Card to HF transceiver applications. NOTE; This interface is for MIC port input; If an accessory port is used instead of the MIC port, the 200K resistor near the Sound Card ''Line Out'' position should be replaced with a 10K resistor.

    46. CLICK HERE to view a PTT circuit that will activate using either RTS or DTR from the selected comport. Comport selection and RTS/DTR is set in the respective software eg; PSK31, or SSTV. This is a transistor PTT circuit, and does not offer the isolation that is had when using Opto-ISOlator/Phototransistor circuits.

      PSK31 VHF and UHF FM TRANSCEIVER INTERFACE DIAGRAMS
      Yes, it had to happen... and it DID!
      I've had hundreds of emails asking if PSK31 could be used on FM...answer is YES!
      .. and in addition, I've had as many more email message requesting PSK31 interfaces for VHF and UHF FM transceivers.
      Let me know what your PSK31 FM transceiver interface requirement is, and I'll try to add the interface diagram ASAP.
      ALINCO VHF-UHF Transceivers


    47. ALINCO VHF and UHF transceivers with standard 8 pin microphone jacks interfaced to the PC sound card for FM PSK31, Packet, and SSTV modes.
      CLICK HERE to view diagram

      WHEN ORDERING, PLEASE SPECIFY THE MAKE AND MODEL OF YOUR TRANSCEIVER.
      FAX ORDERS ARE SHIPPED WITHIN 24 HOURS FROM TIME RECEIVED.
      Radio Shack HF, VHF, and UHF Transceivers


    48. Late Model Radio Shack HTX-10, Ten Meter HF, SSB/FM/AM transceiver interfaced to the PC sound card for PSK31, Packet, and SSTV modes.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, ''RASCAL HTX10''
      Be sure to show ''order number'' on orderform.



    49. Late Model Radio Shack HTX-252 (and transceivers with similar DATA I/O interfaced to the PC sound card for PSK31, Packet, and SSTV modes.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 20
      Be sure to show ''order number'' on orderform.



    50. Radio Shack HTX-202 and HTX-404 (and transceivers with similar DATA I/O, e.g. ICOM, Yaesu...etc.), handheld transceiver(s) interfaced to the PC sound card for PSK31, Packet, and SSTV modes.
      CLICK HERE to view diagram

      YAESU HF-VHF-UHF Transceivers


    51. YAESU FT-847 and similar transceivers with 6 pin mini DIN Data port, to the PC sound card for PSK31, Packet, and SSTV modes.
      CLICK HERE to view diagram...Read carefully the application notes on the diagram! (*This interface is for use in the FM mode... NOT SSB!)
      CLICK HERE to Order Number, 847MDINFM
      Be sure to show ''order number'' on orderform.



    52. YAESU transceivers with 8 pin 'standard' microphone port; Models; FT-1, 102, 211, 290, 480, 5100, 650, 690, 707, 712, 726, 7200, 726, 747, 757, 767, 77, 790, 840, 890, 912, 980, 990, etc... to the PC sound card for PSK31, Packet, and SSTV modes.
      CLICK HERE to view diagram
      CLICK HERE to Order Number, 1/YA
      Be sure to show ''order number'' on orderform.


      CLICK HERE to View, Step By Step, construction techniques I used when building a similar interface.


    NOTICE !
    (PAGE 1) Individual Parts, Components, and Cases listed or shown in the RASCAL PSK31 and SSTV interface diagrams, may be purchased HERE!


    (PAGE 2) Antennas, Parts and Accessories for the HAM Radio operator, may be purchased HERE!


    CLICK HERE for more information, on the interface cover shown here.
    FAX (credit card) ORDERS ARE SHIPPED WITHIN 24 HOURS OF RECEIPT !

    When ordering ISO-KITS, PLEASE SPECIFY serial comport connector, DB9 or DB25. If no connector type is specified, a DB9 female connector will be included with ISO-KIT.

    The total cost of the ISO (part and component) kits (indcluding case) are $25.00.
    The $25.00 includes $3.20 PRIORITY POSTAGE SHIPPING FEE.
    FAX (credit card) ORDERS ARE SHIPPED WITHIN 24 HOURS OF RECEIPT !

    Click Here for BUX CommCO ISO-KIT order form.



    The ISO-KIT interfaces shown on this page are also designed to work with many SSTV sound card programs. For SSTV sound card related software click here!!!


    CLICK HERE to View, Step By Step, construction techniques I used when building a similar interface.

    Download your favorite PSK31 software!
    Download and FTP sites. The original PSK31 program
    written by Peter Martinez, G3PLX.    		 With
    Tutorials
    ftp from PSK Home Page
    from PSK Home Page
    WinPSK by Moe, AE4JY
    PSK-GNR by Al, WD5GNR PSK-GNR
    MixW32 by Nick, UT2UZ
    DX4WIN by Steve, NR4M
    TrueTTY by Sergei, UA9OSV TrueTTY
    WinPSKse by Dave, KA1DT
    DxPSKus by Christian, F6GQK
    DigiPan by Nick, UT2UZ and Howard, KH6TY
    WinWarbler by Dave, AA6YQ
    WriteLog by Ron, K5DJ
    Zakanaka by Bob, K4CY

    NOTE: If you do not see an interface parts kit for your transceiver, send me an Email with the model, make and type (HF, VHF, etc) transceiver, and I'll reply with a suggestion or kit number.
    Buck "[email protected]"

    Wanna go browse the most popular PSK31, SSTV, and Packet Sound Card Interfaces... Then CLICK HERE and go directly to the diagrams page!


    For an in-depth tutorial about PSK31, CLICK HERE.

    If you have a PC that is in the 100 MHz (486 or faster) class with a 16 bit Sound Card (that is ''Creative Labs" sound blaster compatible), and an HF SSB transceiver, you're ready to read PSK31. From here on, everything is simplicity in itself.

    My favorite passion when talking about PSK31 is to note how it conserves our precious spectrum. PSK31 is not a frequency hog; It's very narrow bandwidth of 31 Hz... yes, hertz, not kilohertz, allow us to have a dozen or more QSOs in a one kHz (1000 Hz) band-pass. Add to all this, the fact that the narrow bandwidth of PSK31 reduces QRN and QRM.

    I've worked more than 100 countries on PSK31, and I've yet to run more than 50 watts to make a DX contact.

    In the past 40 plus years, I've written and authored many books and magazine columns, having done so has made my typing speed fluent at 60 to 70 words per minute. The point here is; I am hard pressed to keep up with the speed in which PSK31 handles my typing to the target station. It's not uncommon to read most stations at 30 to 50 words per minute.

    PSK31 offers us plenty of fun and so far, it's been a ''rush'' for me. In my 50 plus years as a HAM, this mode is the most seductive of them all.

    Download an easy to use PSK31 program such as ''WinPSK'' and connect only the sound card LINE IN, to your HF transceiver external speaker port and tune to 14.070 MHz, upper sideband, and watch the waterfall screen for vertical, scrolling, PSK31 signals. It won't be long before your back at this page, looking up the transceiver to sound card interface diagram so you can begin operating PSK31.

    Here is a list of frequencies where you may find PSK activity: 

    	1838.150 
	3580.150 
	7035.150 
	10140.150 
	14070.150 
	18100.150 
	21080.150 
	24920.150 
	28120.150

    Go enjoy PSK31, it's fun, and... it's FREE..!
    73 de Glynn E. "Buck" Rogers Sr. K4ABT


    For more Radio interface diagrams CLICK HERE!

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    If you feel this site is of value to you and other Packet Radio users and System Node Operators, PLEASE LET ME KNOW! CLICK HERE and send me

    TNX es 73 de Buck Rogers K4ABT

    ALL MATERIAL, TEXT AND GRAPHICS ON THESE PAGES ARE © COPYRIGHT of, and ® by, G. E. "Buck" ROGERS Sr, K4ABT. ALL RIGHTS ARE RESERVED. 1986-2000
    Reproduction in any form must have the written permission of the author.

    Connect me to the X1J4 Packet Radio Network; Parameters, Mode, definitions, and example node configurations.

    ISO-KIT are ©, and ® TM of BUX CommCo
    The "PacketRadio Users Notebook" is © and ® tm G.E. "Buck" Rogers Sr. 1985 - 2000.

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    G. E. 'Buck' Rogers Sr K4ABT d/b/a BUX COMMCO
    Copyright © 1996-2000
    All Rights Reserved


    These pages are created by G. E. "buck" Rogers Sr. K4ABT