The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

does the green light change to red when you key the mic?

This would be a very time consuming and complicated procedure. I have not done it on that board but have done so on many other older radios. If you feel you can handle this I may be able to talk you through it.

Changing the driver to a mosfet will increase the power as the new driver will provide a slightly higher drive for the 2 finals.

At least once a week I scan the forum for questions with 1 or 0 replies to see if I can help. It always turns out that I can not offer help or the 1 reply was from you - offering a solution.

If I remember correctly that amp is not tunable. Just set the dead-key on the radio at about 2 to 3 watts and put a swr meter between the 2 to make sure there is no harmonics there. then swr after the amp for another check.

From the radio to the skipper you need a short (3ft) jumper. Then to the DOsy you need another jumper. This one could even be some RG213 or 214 but not really required for that amount of power. Then the coax that connects to the Antenna.

Are you kidding? You know what the shipping would be? WOW!!!

There is not really a better antenna. The best antenna is the one that works best on that vehicle. Wilson 1000 is good but does not always do well in some applications. Try several ones and see what SWR you get and compare field strength from each.

You don't add parts - you take some away and then tune it.

Has the SSB limiter been opened? Has someone been in the alignments?

You can lower the deadkey with the internal adjustment. very simple

Not much can be done on that one. Pull the 1ufd cap connected to the limiter will give a little more modulation. If you try tuning the output slugs you will likely break them - they are glued in place. If you are already thinking about more power, do yourself a favor and get a radio that can be tink...

You will not see that much power from that radio with the dual mosfets. In order to get that much you will need to make some major changes. It's not worth it. Get an external amp or install an internal amp.

Measure the bias and get back to us.

Most likely you need a complete alignment of the PLL and transmitter circuits.

Check the controls and the connections to the controls.

If that model has the little stand-up boards - there is your problem. Re-solder them.

The mic can be the problem. The external speaker jack can be the problem. When you transmit, is there modulation? If not it's the audio chip or in case of 2 transistors one will be bad.

check the squelch clamps on both radios

how much does the supply voltage change from engine off to engine running?