Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Ken -
Did you retune T6?? You effectively hung a capacitor across the primary
of T6, which will detune it somewhat.
If retuning doesn't bring the gain back up to where it was, you can try
coupling instead to the secondary of T6, which is a lower impedance
point and less susceptible to external loading. You may still have to
retune, but I don't think so.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B & C-Line Service Supplement CDs
<www.k4oah.com>
Ken Bessler wrote:
Ken Bessler <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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I'm trying to interface a software defined outboard IF stage
to my TR4 (1969 vintage). I soldered a 4.7pF disc cap to
pin 6 of V3. The other end of the cap goes to the center
conductor of a RCA cable (looks like RG-174 but I know it
isn't) and the sheild of the cable goes to a nearby chassis
ground terminal. The far end of the cable has a male RCA
plug.
OK, now you know the setup - here's my question:
Can the above setup load down the TR4's IF stage if nothing
else is hooked up to it? My TR4 seems a tad deaf since I
installed the IF tap. I can still hear the -107dbM signal from
my XG-2 but the 50mV test signal no longer produces a full
S9 - more like S8.5 or so.
73's de Ken KG0WX - Kadiddlehopper #11808,
Flying Pigs #-1055, Grid EM17ip
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