UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Radio (domestic)

Notices

Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

Closed Thread
 
Thread Tools
Old 28th Jan 2018, 2:59 pm   #1
ultraviolet
Retired Dormant Member
 
Join Date: Jan 2018
Location: Nantwich, Cheshire, UK.
Posts: 20
Default Another Radio - Please Help Identify

Hi - I'm having difficulty identifying this old radio. It looks like a Cossor but I can't pin it down to a particular model. The radio sits on top of a locked cupboard - presumably for spare valves.

Any help in pointing me in the right direction would be gratefully received.
Attached Thumbnails
Click image for larger version

Name:	DP3M0780.jpg
Views:	198
Size:	104.6 KB
ID:	156340   Click image for larger version

Name:	DP3M0781.jpg
Views:	180
Size:	96.1 KB
ID:	156341  
ultraviolet is offline  
Old 28th Jan 2018, 3:12 pm   #2
Boater Sam
Banned
 
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
Default Re: Another Radio - Please Help Identify

Surely the cupboard was for batteries/accumulator?
Has a home brew look about it, all standard components.
Boater Sam is offline  
Old 28th Jan 2018, 5:02 pm   #3
ultraviolet
Retired Dormant Member
 
Join Date: Jan 2018
Location: Nantwich, Cheshire, UK.
Posts: 20
Default Re: Another Radio - Please Help Identify

You are quite right - it would be for a battery.

I'm trying to establish the voltages needed - presumably 1.5v for the LT and 50-60 for the HT?
ultraviolet is offline  
Old 28th Jan 2018, 5:06 pm   #4
Guest
Guest
 
Posts: n/a
Default Re: Another Radio - Please Help Identify

Well worth rebuilding, not quite a restore, with new wire done all neatly. The valves are more than likely OK, I have yet to find a duff one like that.
 
Old 28th Jan 2018, 6:08 pm   #5
boxdoctor
Rest in Peace
 
Join Date: Sep 2010
Location: Ripley, Derbyshire, UK.
Posts: 785
Default Re: Another Radio - Please Help Identify

Quote:
Originally Posted by Boater Sam View Post
Has a home brew look about it, all standard components.
I agree Sam, I can't imagine any self-respecting manufacturer using that type of woodscrew to hold the front panel on. Tony.
boxdoctor is offline  
Old 28th Jan 2018, 6:43 pm   #6
Cobaltblue
Moderator
 
Cobaltblue's Avatar
 
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
Posts: 6,823
Default Re: Another Radio - Please Help Identify

Quote:
Originally Posted by ultraviolet View Post
I'm trying to establish the voltages needed - presumably 1.5v for the LT and 50-60 for the HT?
Those valves are most likely 2V types

It will need probably 120V for the output valve 60 V or so for the detector.It will also need grid bias for the output valve. probably somewhere between -3V and -9V

Knowing the valve types would help a lot but they look typical mullard types such as PM1HF, PM1LF, PM2

Total guess

Cheers

Mike T
__________________
Invisible airwaves crackle with life or at least they used to
Mike T BVWS member.
www.cossor.co.uk
Cobaltblue is offline  
Old 28th Jan 2018, 7:31 pm   #7
ultraviolet
Retired Dormant Member
 
Join Date: Jan 2018
Location: Nantwich, Cheshire, UK.
Posts: 20
Default Re: Another Radio - Please Help Identify

Thanks eeveryone - the "woodscrews" are actually bolts with a slot head. They connect to a metal chassis holding the radio internally.

The lettering on the valves has mostly worn away but on one I can just make Mullard PM2
ultraviolet is offline  
Old 28th Jan 2018, 7:44 pm   #8
Cobaltblue
Moderator
 
Cobaltblue's Avatar
 
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
Posts: 6,823
Default Re: Another Radio - Please Help Identify

The PM2 is the output valve and is a 2V filament type

So chances are they are all 2V filaments.

Unless the circuit uses auto-bias it will probably need -9V grid bias

You might need to reverse engineer some of the circuit

Cheers

Mike T
__________________
Invisible airwaves crackle with life or at least they used to
Mike T BVWS member.
www.cossor.co.uk
Cobaltblue is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 7:09 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.