UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Racal 9081 SSG No FM but he meter reads OK

Markany · 15th Jan 2018, 6:41 pm

Hi All

I have an early version 9081 the one with the LED on the from panel, I have a printed service manual but it unhelpfully says the FM mod PCB is for later versions only.

The problem is after the usual 12V PSU cap failures were sorted (for now anyway) upon testing there is no FM mod from the unit. Now the meter reads and the level set appears to work, the AM side is fine. So my conclusion is the AF osc works and the faults is more likely to be in the FM mod section.

Has anyone seen this problem before or has the circuit diagram for the earlier units, i can only find the more recent ones on line.

Regards

Mark

15th Jan 2018, 6:41 pm	#1
Markany Retired Dormant Member Join Date: Jan 2018 Location: Andover, Hampshire, UK. Posts: 4	Racal 9081 SSG No FM but he meter reads OK Hi All I have an early version 9081 the one with the LED on the from panel, I have a printed service manual but it unhelpfully says the FM mod PCB is for later versions only. The problem is after the usual 12V PSU cap failures were sorted (for now anyway) upon testing there is no FM mod from the unit. Now the meter reads and the level set appears to work, the AM side is fine. So my conclusion is the AF osc works and the faults is more likely to be in the FM mod section. Has anyone seen this problem before or has the circuit diagram for the earlier units, i can only find the more recent ones on line. Regards Mark