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T-368 speech amp




 
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Author Topic: T-368 speech amp  (Read 196 times)
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W8ACR
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Penta 254W


« on: April 14, 2018, 04:39:49 PM »

I just reacquired my T-368E that slipped away 15 years ago. I want to try to spiff up the audio a bit. Does anyone out there have suggestions for a home-brew speech amp circuit or commercial unit that makes the transmitter sound better? Also, is the stock modulation transformer one of the limiting factors? I do have a UTC CVM-4 that I could probably slip in there if that would be worth the effort.

Thanks, Ron

PS: After I posted this, I searched and found the WA1HLR audio mods as posted by K4HX. I would still like to hear from others who have tackled this problem in other ways. Thanks.
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The AM voice of Knox, North Dakota
Steve - K4HX
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« Reply #1 on: April 16, 2018, 12:05:31 AM »

Another approach.

http://amwindow.org/tech/htm/n9foy/n9foymods.htm
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WA1QHQ
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« Reply #2 on: April 16, 2018, 12:53:20 PM »

On my basic model T-368, I just used a solid state audio amplifier module, I think it was 20 Watts and a backward output transformer, works FB, good fidelity. No other changes to the modulator were required however I did do the changes to the RF deck to improve audio highs.

Mark WA1QHQ
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