[R-390] After diner: More Local & Line stuff
Craig Heaton
hamfish at efn.org
Tue Dec 31 22:16:06 EST 2013
Answered some of my own questions while viewing the schematics in the Y2K.
The AGC line that goes to the 2nd mixer has a 270 ohm and a 1.5M ohm
resistor in series going to ground. Close enough to my readings of 1.8M
earlier today. Last post should of read P108 vs P208.
Then had to prove it out. Back out to the shack and removed the top of the
Motorola R390/A and checked the resistance on those two same lines. Darned
close to identical. The Motorola plays normal. Back to square one.
Sometime soon, it is time to add a little R to the Line & Local pots.
Curious to see how much is needed.
Happy New Year
Craig
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