GEC BC5149 Receiver. - UK Vintage Radio Repair and Restoration Discussion Forum

lolomovil · 14th Nov 2017, 3:43 pm

Hello everyone, I am restoring a G.E.C. BC5149 and I can't get get the schematic diagram. The valve line up is X79 W727 DH77 N709 and U78 rectifier. The N709 audio section works fine, but when you apply signal to the volume pot there is no output on the speaker. On the other hand the valve W727 (the receiver has a 5749 equivalent) gets very hot. I measured the cathode voltage and is close to zero. The cathode resistor is 68 ohms. I hope to get help from the user of the forum to repair it. Regards.

G8UWM-MildMartin · 14th Nov 2017, 3:59 pm

I would measure the anode voltage of the DH77 (pin 7) and check the resistor connected to it.

14th Nov 2017, 3:43 pm	#1
lolomovil Diode Join Date: Aug 2017 Location: Tegueste, Tenerife, Spain Posts: 4	GEC BC5149 Receiver. Hello everyone, I am restoring a G.E.C. BC5149 and I can't get get the schematic diagram. The valve line up is X79 W727 DH77 N709 and U78 rectifier. The N709 audio section works fine, but when you apply signal to the volume pot there is no output on the speaker. On the other hand the valve W727 (the receiver has a 5749 equivalent) gets very hot. I measured the cathode voltage and is close to zero. The cathode resistor is 68 ohms. I hope to get help from the user of the forum to repair it. Regards.

14th Nov 2017, 3:59 pm	#2
G8UWM-MildMartin Heptode Join Date: Jan 2004 Location: Stockport, Greater Manchester, UK. Posts: 827	Re: G.e.c bc5149 I would measure the anode voltage of the DH77 (pin 7) and check the resistor connected to it.