Ok, so you've managed to get some 6m frequencies programmed into your 60W 42-50 MHz Maxtrac/Radius, but you are having problems with the TX and RX locking up and working properly. Well, try the following fixes:
Easy Fix
First, check the TX and RX VCO steering lines to make sure they swing between 2 and 8 VDC. If they don't, read on.
On the RF board under a cover are the VCOs for TX and RX. You should see a test point on the board marked SL. This is in the middle of a bunch of capacitors C109,C110,C111, C127.
This is the VCO steering line. While monitoring this point with a voltmeter, adjust L202 in the RX VCO section for around 7.8 VDC. Likewise, with the radio keyed, adjust L213 in the TX VCO section for 7.8 VDC (it helps to have a manual). The radio should work on six meters now although the sensitivity of the RX will be somewhat reduced because the front end of the radio falls off above 50 mHz.
If you are still not satisfied with the performance of the radio, you need:
The Hard Fix
TX:
Program the radio with some 6 Meter channels. Tweak the TX VCO on the 6 Meter channel so that you get a lock (see above). TX power will be high on the key up but will drop to about 25 Watts.
Open the covers on the PA. There is an inverted "U" loading coil in the PA. The coil or hairpin is adjacent to the final power transistor. The coil is made of 12 ga. wire.
Flow solder on the top and sides of the U.
Check power out.
By experimenting with solder, power should come up to full rated power.
RX:
There is a row of 9 coils without slugs on the rf board. Place non-ferrous brass or aluminum set screws in the cans.
Tune the cans for best RX sensitivity.