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ept360014c rx ssb distortion

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tauros
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ept360014c rx ssb distortion

Post by tauros » Monday, 13 February 2017, 18:37 PM

Chassis ept360014b RX distorted only in ssb for strong signals, AM normally, when I close rf gain the RX gets normal, Has anyone had this problem


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jon6667
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Re: ept360014c rx ssb distortion

Post by jon6667 » Tuesday, 14 February 2017, 12:43 PM

what radio. its front end overload.
the old president jackson had that problem. i fixed a few but i don't remember the mod. it was so long ago.

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MDYoungblood
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Re: ept360014c rx ssb distortion

Post by MDYoungblood » Tuesday, 14 February 2017, 16:39 PM

I'm guessing (really know) it is a Galaxy radio but we need the model to say exactly what it could be.

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Re: ept360014c rx ssb distortion

Post by pabxone » Wednesday, 15 February 2017, 5:03 AM

It's most likely an AGC problem.

I'm assuming you have tried doing a RX alignment to see if that has any effect ?

Have a look around IC1 & TR12, the problem will most likely be one of them or a diode or electrolytic in that part of the circuit.

IC1 will be a NJM324 / NJM2902 or similar - that can be directly replaced with an LM324

If there are odd squelch problems as well it is highly likely IC1 is your problem

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Re: ept360014c rx ssb distortion

Post by jon6667 » Wednesday, 15 February 2017, 12:36 PM

http://www.cbtricks.com/cgi-bin/databas ... sensitive=" onclick="window.open(this.href);return false;


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