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

+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Various and Sundry Categories (https://philcoradio.com/phorum/forumdisplay.php?fid=37)
+--- Forum: Test Equipment (https://philcoradio.com/phorum/forumdisplay.php?fid=31)
+--- Thread: HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? (/showthread.php?tid=15780)

---

HEATHKIT SG-8 SIGNAL GENERATOR unknown mod? - Bradley Rush - 11-28-2016

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.

---

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

This is the front of the SG-8

---

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

This is the back

---

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.

---

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?

---

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

HEATHKIT SG-8 now up and going

---