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Title: T-368 speech amp Post by: W8ACR 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. Title: Re: T-368 speech amp Post by: Steve - K4HX on April 16, 2018, 12:05:31 AM Another approach.
http://amwindow.org/tech/htm/n9foy/n9foymods.htm Title: Re: T-368 speech amp Post by: WA1QHQ 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. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Mark WA1QHQ |