[R-390] R390 Low Gain at 8 kHz BW

[Renee K6FSB]

I had a similar issue eons ago. check the coils in the IF cans or at 
least verify continuity. I had one that had a broken wire.
Renée, K6FSB

On 2019-06-05 5:09 p.m., Jacques Fortin wrote:
> Hello John,
>
> 12dB down ? WOW !
>
> I have one or two ideas:
>
> 1_ Check all the 2.7 ohms resistors in the IF deck: they are only used when
> the 8kHz BW is selected. (R514, R 524, R529, R534) check also the internal
> IF coils continuity (the ones selected for the 8kHz BW).
> 2_ Check R519, which was a selected manufacturing value to set the global IF
> strip gain when the 8kHz BW is used. Remove it or measure value. If
> doubtful, replace with a modern resistor of the same value.
>
> 73, Jacques, VE2JFE
>
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