[Hammarlund] HQ140X questions

[Richard Knoppow]

    Maybe, but its a peculiar mod. The blue wire will be the normal IF 
feed from the mixer to the IF, so it appears that either the IF is being 
fed to something external or its a means to feed an external signal at 
the IF frequency to the IF. One would think an SSB adapter would be fed 
from later in the IF chain. Maybe someone else will recognize what it is 
or figure it out.

On 12/13/2023 9:45 AM, Ray G3XLG via Hammarlund wrote:
> Just had a look Richard, the centre pin of the strange chassis connector
> goes via a 56K resistor to pin 5 the anode of V3 the mixer.
> 
> A blue wire also on pin 5 goes up through the chassis to T1 between the
> mixer and the first 1st IF.
> 
> I think you are right it's a Ham mod, perhaps to feed a signal generator?
> 
> 73
> 
> Ray G3XLG


-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998