Re: Improved audio from the Bitx40 (video)
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Hi Peter,
Wouldn't it be better to remove the 47pf C102 all together and short the terminals together, then put a 2-40pf trimmer cap back in place where it is missing? Then you could adjust it while watching the audio analyzer and listening to the receive audio. I was already planning on doing it so I could accomplish the same thing you did. Joel Caulkins KB6QVI
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On Jan 1, 2017, at 7:28 PM, parkerp@... [BITX20] < BITX20@...> wrote:
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(I think Bill might have mentioned this on Soldersmoke but I can't find the reference)
My Bitx has C102 as 47pF and no carrier frequency adjust trimmer (C103).?
It sounded very slightly bassy, lacking highs. ?The area around 2kHz is important.?
Most people wouldn't notice it but at QRP your audio band pass needs to be optimum to be heard on SSB.?
In short, I got better audio by removing C102's 47pF chip capacitor and substituting 27pF. ?Either a 27pF disc ceramic or 22 + 4.7pF. ?
Reports from other stations have been complimentary.?
This video discusses these topics in detail.?
73, Peter VK3YE
| | | | | | One or two capacitors can improve transmit and receive audio if your transceiver is misaligned or doesn't suit your voice. Find out how by watching th... | | | | Preview by Yahoo | | |
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Joel Caulkins/N6ALT