[Heathkit] SB-102 voltages

[Carl]

Any tube on the AGC line can do that.

Carl
KM1H


----- Original Message ----- 
From: "GARY HATTAWAY" <gary_hattaway at bellsouth.net>
To: <heathkit at mailman.qth.net>
Sent: Saturday, October 22, 2011 3:18 PM
Subject: [Heathkit] SB-102 voltages




All,

I'm working on a SB-102 that uses a 6HS6 as the RF amplifier...after a few 
minutes, the AGC begins to misbehave, and the s meter swings below zero. 
These are classic signs of bad (leaky) RF or first mixer tubes. I've checked 
V-10, 11, and even replaced them with known good tubes. I've checked all the 
resistor and cap values around the RF amp circuitry and found everything 
within specs. I can substitute a 6AU6 for the 6HS6 and the receiver works 
pretty well, but then the s-meter tends to rest below zero on 15 meters and 
above. It's fine on 80-20.

Does anyone have nominal pin for pin voltages recorded for this rig?

Thanks,
Gary KQ1E
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