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

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Components and Circuits

Notices

Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

Reply
 
Thread Tools
Old 14th Jul 2018, 3:29 am   #1
petervk2mlg
Heptode
 
petervk2mlg's Avatar
 
Join Date: Jan 2007
Location: Parkes, NSW Australia
Posts: 684
Default VR35 valve

Hi
I came across this valve in my collection. Can anyone tell me what radio(s) used this type? It's a double pentode with a 2 volt filament.
Attached Thumbnails
Click image for larger version

Name:	VR35.jpg
Views:	81
Size:	35.4 KB
ID:	166035  
petervk2mlg is offline   Reply With Quote
Old 14th Jul 2018, 8:37 am   #2
Cobaltblue
Nonode
 
Cobaltblue's Avatar
 
Join Date: Dec 2010
Location: Exeter and Poole, UK.
Posts: 2,819
Default Re: VR35 valve

Don't know about military use bit its. QP21 or 240QP in Cossor coding and certainly Cossor used in at least two models the 485 and the 583 as a QPP output valve it gave higher power output for less average HT consumption at the expense of higher LT consumption. Very commonly used by many manufacturers of battery sets in the late 1930s

Cheers

Mike T
__________________
Don't care if it was a bargain why's it on my table?
Mike T BVWS member.
www.cossor.co.uk
Cobaltblue is offline   Reply With Quote
Old 14th Jul 2018, 9:01 am   #3
M0FYA Andy
Octode
 
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 1,557
Default Re: VR35 valve

The VR35, along with a VR21, is used in the A1134 and A1134A intercom amplifiers used in the Avro Lancaster and the other heavy bombers of WW2 fame.

Andy
M0FYA Andy is offline   Reply With Quote
Old 14th Jul 2018, 9:36 am   #4
ukcol
Dekatron
 
ukcol's Avatar
 
Join Date: May 2003
Location: Harlaxton, Lincolnshire, UK.
Posts: 3,820
Default Re: VR35 valve

The Nation Valve Museum states that the VR35 is the Military version of the Osram QP21.
Attached Files
File Type: pdf qp21.pdf (127.6 KB, 20 views)
__________________
Best Regards,
Colin McLaughlin
BVWS Member
ukcol is offline   Reply With Quote
Old 15th Jul 2018, 12:27 am   #5
petervk2mlg
Heptode
 
petervk2mlg's Avatar
 
Join Date: Jan 2007
Location: Parkes, NSW Australia
Posts: 684
Default Re: VR35 valve

Many thanks, Mike, Andy and Colin.
petervk2mlg is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 2:41 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 - 2018, vBulletin Solutions, Inc.
Copyright ©2002 - 2018, Paul Stenning.