Eico 232 VTVM Schematic - 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: Eico 232 VTVM Schematic (/showthread.php?tid=25597)
+- 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: Eico 232 VTVM Schematic (/showthread.php?tid=25597)
Eico 232 VTVM Schematic - RodB - 02-05-2025
A friend gave me this Eico 232 VTVM and I'm having trouble locating the schematic for it. This one seems to be a later version because it has solid state diodes to replace the 6AL5 duo diode tube. I would say maybe early 60s. All my searches have resulted in the schematic for a 12AU7 and 6AL5 configuration. This one has only a 6FQ7/6CG7 replacing the 12AU7. Any help is appreciated.
RE: Eico 232 VTVM Schematic - morzh - 02-05-2025
Is that a battery holder?
RE: Eico 232 VTVM Schematic - Chas - 02-05-2025
Try BAMA for a schematic.
Looks like a replacement power source for the D battery has been installed. The tube may be a sub for the 12AU7. As long as it balances and is stable should be fine.
Was the Uniprobe provided?
Chas
RE: Eico 232 VTVM Schematic - RodB - 02-05-2025
It's a microwave antenna. ?;-p?. I substituted 1N4002s off the 6.3 vac winding for the 1.5 volt battery. Uniprobe is there. BAMA has the older schematic. I haven't looked up the tube yet, it has two sections but it's a 6 volt tube. I guess I'll wing it for now.