UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

MotorBikeLes · 17th Jun 2021, 10:23 pm

I had quite a few E2s 40 years ago, but I never saw one with an ECC91 as best as I can recall. I think all mine had octal valves, and only one half of the valve was used. I once had one with intermittent output, but that was a badly (read NEVER) soldered connection to the valve base.
I would be inclined to try a different valve. I don't know the characteristics of the ECC91, but maybe half an ECC88 would be better. Why not a single valve instead of a double. Would an EC92 be suitable. Just random ideas.
The output DOES fall on higher ranges, but that seems rather a lot.
Les.

17th Jun 2021, 10:23 pm	#5
MotorBikeLes Nonode Join Date: Dec 2012 Location: Kirk Michael, Isle of Man Posts: 2,350	Re: Advance E2 Signal Generator fault I had quite a few E2s 40 years ago, but I never saw one with an ECC91 as best as I can recall. I think all mine had octal valves, and only one half of the valve was used. I once had one with intermittent output, but that was a badly (read NEVER) soldered connection to the valve base. I would be inclined to try a different valve. I don't know the characteristics of the ECC91, but maybe half an ECC88 would be better. Why not a single valve instead of a double. Would an EC92 be suitable. Just random ideas. The output DOES fall on higher ranges, but that seems rather a lot. Les.