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Gilfillan 5B8
#9

Ok the bias divider is the 2 resistors that are connected to center tap of the high voltage winding of the power transformer. The resistors are connected though a choke, it's drawn as a choke but it maybe the FC field coil part of the speaker. Looks like one is 350 ohms and the other is 50.

Try touching pin 5 of the 6F6 should get hum. Try touching the grid cap on the 6Q7 and wiggle the tube at the same time to see of you have a bad connection. Check the resistance from pin8 of 6Q7 to the chassis. Should have 0 ohms. Pull off the grid cap and touch grid cap of the tube without the lead attached. Should hum.
Terry


Messages In This Thread
Gilfillan 5B8 - by dseverson - 03-26-2015, 02:54 PM
RE: Gilfillan 5B8 - by Radioroslyn - 03-26-2015, 06:21 PM
RE: Gilfillan 5B8 - by dseverson - 03-27-2015, 09:26 PM
RE: Gilfillan 5B8 - by dseverson - 03-27-2015, 09:30 PM
RE: Gilfillan 5B8 - by Radioroslyn - 03-27-2015, 09:48 PM
RE: Gilfillan 5B8 - by dseverson - 03-28-2015, 12:53 AM
RE: Gilfillan 5B8 - by Radioroslyn - 03-28-2015, 07:03 AM
RE: Gilfillan 5B8 - by dseverson - 03-28-2015, 08:49 PM
RE: Gilfillan 5B8 - by Radioroslyn - 03-28-2015, 09:33 PM
RE: Gilfillan 5B8 - by dseverson - 03-30-2015, 12:13 AM
RE: Gilfillan 5B8 - by Radioroslyn - 03-30-2015, 08:39 AM
RE: Gilfillan 5B8 - by dseverson - 03-30-2015, 05:54 PM
RE: Gilfillan 5B8 - by dseverson - 04-01-2015, 02:30 PM
RE: Gilfillan 5B8 - by Radioroslyn - 04-01-2015, 09:32 PM
RE: Gilfillan 5B8 - by dseverson - 04-02-2015, 05:13 PM
RE: Gilfillan 5B8 - by dseverson - 04-03-2015, 09:27 PM
RE: Gilfillan 5B8 - by Radioroslyn - 04-03-2015, 11:12 PM



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