AUTOMATIC SSB RELAY DELAY?

[Sonar]

Does anyone know if this amp can be operated on SSB?



I know some amps have a diode or capacitor in the amps keying circuit that allows the amp to operate on SSB without having a dedicated SSB switch.

 

[Tallman]

Yes but it will sound like crap. That is a class "c" biased and it will sound bad. You would have to change the circuits for keying the amp. There are ways to modify the amp but it still sound bad.

http://www.cbtricks.com/Amp/txstar/mod_v_plus_mod_plus/index.htm

 

[DainBramage]

iszat knob turned all the way to the right?

 

[Justme]

at 11 no less......

 

[ForestRunner98]

We’re talking Spinal Tap numbers!!!!

 

[Shadetree Mechanic]

Some people under drive them on side band and they sound ok, but really there is no need to do that unless that is your only amp and you already have it.

 

[543_Dallas]

You can put a capacitor from the negative side of the relay coil to ground. That will add delay. As someone already mentioned it is a class C amp. Most cb sets sound so bad on ssb no one will really notice the extra distortion anyway.

 

[AudioShockwav]

I have had several of those in the past.
They do what they are made for on AM mode.
They make you sound like Capitan Crunch on SSB.
No real way to fix that problem.


73
Jeff

 

[Tallman]

compare switching circuits on the RMItaly or look at this schematic.
http://www.cbradio.nl/Silver_Eagle/Manual_Silver_Eagle_Millenium_777_Plus.pdf

SW3 and C3 and TR1 are the keying relays drive do not put a cap on the coil it will cause an over current and pop the transistor.

 

[543_Dallas]

compare switching circuits on the RMItaly or look at this schematic.
http://www.cbradio.nl/Silver_Eagle/Manual_Silver_Eagle_Millenium_777_Plus.pdf

SW3 and C3 and TR1 are the keying relays drive do not put a cap on the coil it will cause an over current and pop the transistor.

That's plausible if you put a few thousand mfd on there. I do like the other method but if a guy could reference the schematic and figure it out he probably wouldn't have asked.

 

[Tallman]

That's plausible if you put a few thousand mfd on there. I do like the other method but if a guy could reference the schematic and figure it out he probably wouldn't have asked.

It would take 4.7 uf to work. But you are right if he could read a schematic the question would not have been asked.

Best advice I can give is to sell that amp and buy one rigged for ssb.

 

[AudioShockwav]

It would take 4.7 uf to work. But you are right if he could read a schematic the question would not have been asked.

Best advice I can give is to sell that amp and buy one rigged for ssb.

The best advise is the best advice.
You would be better off to sell it as they get a good price used and buy a 2 transistor amp that runs in push/pull and has some kind of bias for SSB work.
The mod and mod v are really only good for AM.
They work well if you set them to just dead key slightly more than the radio and let them swing to full output.
It looks really impressive on a watt meter, even more so if you drive a bigger amp with it.
I am not going to tell you it will be clean.....but if swing is your thing......
It can be rough but.
They will never sound right on side band.
Been there.

73
Jeff