Cossor 376B Power Supply - UK Vintage Radio Repair and Restoration Discussion Forum

ambriel · 18th Aug 2018, 2:18 pm

I've recently had a Cossor Type 376B valve-based wireless come into my possession.

It was a skip-find and appears to have spent quite a lot of time in a shed somewhere as there's woodworm damage to the case in places.

A cursory inspection suggests that it's otherwise complete.

Now I understand this model is battery powered but what would be the input voltage?

paulsherwin · 18th Aug 2018, 2:24 pm

It used a 2V accumulator for the filaments and a 120V dry battery for the HT. I think this model also used a 9V grid bias battery.

Cobaltblue · 18th Aug 2018, 3:28 pm

There's two versions of the 376B electrically they are both battery superhets with qpp output.

The cabinets are very different but the chassis not so much.

The service sheets for both versions are available top right.

Check out my rogues gallery to see which is which.

Cheers

Mike T

ambriel · 19th Aug 2018, 2:20 pm

Thanks for the information.

I've attached 3 photos of it. As you can see, it's a bit rough but appears complete.

Cobaltblue · 19th Aug 2018, 4:40 pm

Yes that the later version

https://www.service-data.com/section...-later-version

Yes it looks a bit rough so before you to involved in restoration I would at least check continuity of the phase splitter and output transformers these will be difficult to replace on this set but another forum member Ed Dinning and some others do a rewinding service, but it won't be cheap.

Cheers

Mike T

ambriel · 25th Aug 2018, 1:24 pm

Thanks, I'll dig my meter out and see what I can find.

Would there be any value to it from a parts point of view? The valves appear fine but obviously I haven't been able to test them. There's a 220 B, 200 DD, 220 P/A, plus two more I can't read the numbers off.

18th Aug 2018, 2:18 pm	#1
ambriel Triode Join Date: Apr 2011 Location: NW Sutherland, Scotland. Posts: 10	Cossor 376B Power Supply I've recently had a Cossor Type 376B valve-based wireless come into my possession. It was a skip-find and appears to have spent quite a lot of time in a shed somewhere as there's woodworm damage to the case in places. A cursory inspection suggests that it's otherwise complete. Now I understand this model is battery powered but what would be the input voltage?

18th Aug 2018, 2:24 pm	#2
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,931	Re: Cossor 376B Power Supply It used a 2V accumulator for the filaments and a 120V dry battery for the HT. I think this model also used a 9V grid bias battery.

18th Aug 2018, 3:28 pm	#3
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,857	Re: Cossor 376B Power Supply There's two versions of the 376B electrically they are both battery superhets with qpp output. The cabinets are very different but the chassis not so much. The service sheets for both versions are available top right. Check out my rogues gallery to see which is which. Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

19th Aug 2018, 2:20 pm	#4
ambriel Triode Join Date: Apr 2011 Location: NW Sutherland, Scotland. Posts: 10	Re: Cossor 376B Power Supply Thanks for the information. I've attached 3 photos of it. As you can see, it's a bit rough but appears complete. Attached Thumbnails

19th Aug 2018, 4:40 pm	#5
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,857	Re: Cossor 376B Power Supply Yes that the later version https://www.service-data.com/section...-later-version Yes it looks a bit rough so before you to involved in restoration I would at least check continuity of the phase splitter and output transformers these will be difficult to replace on this set but another forum member Ed Dinning and some others do a rewinding service, but it won't be cheap. Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

25th Aug 2018, 1:24 pm	#6
ambriel Triode Join Date: Apr 2011 Location: NW Sutherland, Scotland. Posts: 10	Re: Cossor 376B Power Supply Thanks, I'll dig my meter out and see what I can find. Would there be any value to it from a parts point of view? The valves appear fine but obviously I haven't been able to test them. There's a 220 B, 200 DD, 220 P/A, plus two more I can't read the numbers off.