HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Printable Version

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+--- Thread: HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? (/showthread.php?tid=15780)

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HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Bradley Rush - 11-29-2016

I have a heathkit sg-8 that some one has modified
They put a 8 pin socket on the right upper side.

Pin 5  goes to pin 1 of the 12AU7
Pin 6  goes to RF out jack
Pin 7  goes to ground 
Pin 8  goes to 6.3 Vac 

I ask to find out if any knows of this mod?
 If so what tube should I get?
My guess is this tube is amplifying the RF.

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RE: HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Bradley Rush - 11-29-2016

This is the front of the SG-8

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RE: HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Bradley Rush - 11-29-2016

This is the back

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RE: HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Radioroslyn - 11-29-2016

I doubt it's a socket for an additional tube, probably for some sort of accessory. Maybe an 100kc calibrator.

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RE: HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Bradley Rush - 11-30-2016

With the signal gen  hooked up you could monitor rf plate voltage on the 12AU7 and filaments for stability?

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RE: HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Bradley Rush - 11-30-2016

HEATHKIT SG-8 now up and going

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