[AMRadio] another SX-28 question

[w5sum]

good morning Jeff

yes there is an AVC switch and it is on... I think the problem is, that this 
is a non linear pot I dug up... measuring the resistance, it moves slowly for 
just a cunt hair, then it JUMPS quickly... I'm going to change this out first

Happy New Year to ya!!

Ronnie

On Wed, 31 Dec 2003 07:58:36 -0600, Geoff Edmonson wrote
> > the RF gain control was not working at all. I found a pinched wire that 
was
> > grounded.  This was the wire going to the cathode resistor of V-1. I fixed
> > this, and even put a new pot in there for the RF Gain. It works BUT.. all
> > you have to do is just barely turn it and it blanks out the front end.
> > Could one of the cathode resistors have changed value, canceling out the
> > work of the rf gain control? R-3 to V-1 or R8 to V-2? Or, possibly, C14 on
> > V-1 or C18 on V-2?
> 
> Just a silly-assed question, Ronnie - mainly because I don't remember...
> but is there an AGC control switch on the front of the SX-28?  It 
> should be ON.  Without the AGC circuit being active, you could have 
> the same effect - any signal would send the front-end to saturation.
> 
> Happy New Year!
> 73 = Best Regards,
> -Geoff/W5OMR
> 
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