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Let’s begin at the beginning shall we… I offered up a way to increase modulation by changing the reaction time of the limiter circuit with the use of a capacitor. I did say that I did not like to cut the diode but did not bother to offer up an explanation as to why. I understand the way...

Wait let me guess, you clip the diode and get 150% crystal clear modulation from your radio... Have you ever looked at the RF envelope on an O-Scope or do you just listen on a crappy 3 inch speaker? Dont judge your modulation by how your talkback sounds either, that is on the output of...

If you still feel you need more modulation after you adjust VR4, remove C71 and replace it with a 33uf 25v capacitor (make sure you get the polarity right). I never liked the idea of clipping the diode... Jim

Tram D80 with The_Mod Vintage Rare Tram D80 with custom display *** Look *** - eBay (item 130377263903 end time Mar-28-10 19:16:25 PDT)

I have worked on a lot of these radios and would not use anything less than a 35 volt cap. Jim

The fact is that once you open the radio and make any changes/modifications to the modulation, transmitter, or frequency coverage it is no longer "Type Accepted". If you need to see the rules, regulations, and laws regarding this you should contact the FCC directly. Jim