Hi guys. I am having some problems. When i use my radio with no amp in use on ssb my audio is a good q5 according to everyone i request reports from. However, when i attach my amplifier everybody says the audio is very scratchy and darlicky and generally crap. I've altered the gain on my mic and even lowered the drive power, but people say it sounds terrible. Can anybody assist please? I'd be very grateful for any feedback.
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Ssb audio awful while using zetagi burner
- Thread starter Damo666
- Start date
Which amp are you using? sounds like a class-c style amp which will cause those symptoms.
Thanks for the response. The amp is a zetagi b47. I don't know what class it is, but there's a schematic on the cb tricks website. The audio is perfect when the amp is off, but awful when switched on. By the way, there's a ssb/am switch. I've tried it switched both ways. Cheers.
Well being that it's a mosfet amp the bias idea is out so it maybe other things such as over driving, the manufacturer states 4 watts am and 12 watts ssb.
Hi. I've think i've established that it's not right for ssb as it's a class c. I drive it with 4 watts on am/fm and 4 watts pep on ssb. I might try a variable resistor in the r4 position to see if i can improve things. Failing that, i'll just return the alc in my radio to do more power and omit the amp. Cheers.
And that is why crappy audio still runs rampant on the band.Nobody cares or knows enough to give a damn.
AGREED!!
It is not a class-c circuit because it uses the MS-1307 mosfet for output which is biased with 3 to 6 volts dc and the culprit is most likely the alc in your radio that is the problem as stated in my previous post refered to as over driving the amp when in ssb mode.