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Old 25th Aug 2019, 11:15 pm   #25
Skywave
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Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
Default Re: Philips 170A restoration

Quote:
Originally Posted by cdm1christopher View Post
Well I'll leave the valves alone as they work fine although I do have some conductive paint but its grey.
Yes, I've used that grey conductive paint a few times to redo the screening - and it always worked well. Just make sure that you have a bare wire, electrically connected to that paint and to pin 1 of the valve base: that maintains the screening, since pin 1 is - or should be - connected to chassis at the valve socket.
Although red is the most usual colour for the screening of an EF39 (and ECH35), occasionally I have seen some EF39 that were grey. From memory, they were probably ex-military versions with a 'VR' number: same valve, though.

Al.
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