German Radio Valves. - UK Vintage Radio Repair and Restoration Discussion Forum

Peter.G0DRT · 12th Dec 2017, 4:35 pm

Some time ago I found a site giving details of how to resurrect defunct valves as shown.This was done by removing the faulty valve and fitting B7G or B9A valves etc inside the existing casing.
I have searched the internet but with no luck.Has anyone any info on this?

Peter.

stevehertz · 12th Dec 2017, 5:36 pm

What era is this? I have lots of German Grundig sets and they all have 'normal' European valves.

turretslug · 12th Dec 2017, 5:56 pm

17/41 and 34/37 are likely to be week/year date-codes. There were certainly wire-ended versions of some B7g/B9a valves made for high-reliabilty use, e.g. the wire-end EF91 and EL821 equivalents here, that would lend themselves to this sort of rebuilding.

Cobaltblue · 12th Dec 2017, 9:24 pm

These look like German Military valves you can find them on Radiomuseum.
The RL2T2 is a 1.9V filamenet battery valve https://www.radiomuseum.org/tubes/tube_rl2t2.html

Cheers

Mike T

Gridiron · 12th Dec 2017, 10:18 pm

The RV2 P800 was used in all stages of the WW2 Wehrmacht Torn Eb radio, probably the most well known German military receiver (also used by the Luftwaffe)
Mike.

M0FYA Andy · 13th Dec 2017, 9:51 am

I've been reading this thread with interest. Although I don't have any German equipment, I do have a number of this style of valve in my valve collection. I don't recall ever seeing an article on 'restuffing' this type of valve, but it can't be too hard to devise a method if you have the original defective valve to start off. I guess the starting point is identifying its characteristics to find a suitable relacement type. I wonder if the wire-ended types, usually Russian, might be easier to install than a conventional valve-base?

Andy

Peter.G0DRT · 13th Dec 2017, 11:47 am

Although I have details of the characteristics of these valves I have no plans to fit alternative types.If I had a radio for which these were designed for (wishful thinking) I would give it a go.I had the details from the internet in my documents but I guess they got deleted at some time.As mentioned it shouldn't be too difficult to find some matches or near matches as alternatives,possibly wire ended types.
Peter.

12th Dec 2017, 4:35 pm	#1
Peter.G0DRT Pentode Join Date: Dec 2009 Location: Isle of Sheppey, Kent, UK. Posts: 148	German Radio Valves. Some time ago I found a site giving details of how to resurrect defunct valves as shown.This was done by removing the faulty valve and fitting B7G or B9A valves etc inside the existing casing. I have searched the internet but with no luck.Has anyone any info on this? Peter. Attached Thumbnails

12th Dec 2017, 5:36 pm	#2
stevehertz Dekatron Join Date: Sep 2011 Location: Rugeley, Staffordshire, UK. Posts: 8,831	Re: German Radio Valves. What era is this? I have lots of German Grundig sets and they all have 'normal' European valves. __________________ A digital radio is the latest thing, but a vintage wireless is forever..

12th Dec 2017, 5:56 pm	#3
turretslug Dekatron Join Date: Nov 2011 Location: Surrey, UK. Posts: 4,396	Re: German Radio Valves. 17/41 and 34/37 are likely to be week/year date-codes. There were certainly wire-ended versions of some B7g/B9a valves made for high-reliabilty use, e.g. the wire-end EF91 and EL821 equivalents here, that would lend themselves to this sort of rebuilding.

12th Dec 2017, 9:24 pm	#4
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,865	Re: German Radio Valves. These look like German Military valves you can find them on Radiomuseum. The RL2T2 is a 1.9V filamenet battery valve https://www.radiomuseum.org/tubes/tube_rl2t2.html Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

12th Dec 2017, 10:18 pm	#5
Gridiron Heptode Join Date: Apr 2010 Location: West Midlands, UK. Posts: 662	Re: German Radio Valves. The RV2 P800 was used in all stages of the WW2 Wehrmacht Torn Eb radio, probably the most well known German military receiver (also used by the Luftwaffe) Mike.

13th Dec 2017, 9:51 am	#6
M0FYA Andy Nonode Join Date: May 2007 Location: Preston, Lancashire, UK. Posts: 2,511	Re: German Radio Valves. I've been reading this thread with interest. Although I don't have any German equipment, I do have a number of this style of valve in my valve collection. I don't recall ever seeing an article on 'restuffing' this type of valve, but it can't be too hard to devise a method if you have the original defective valve to start off. I guess the starting point is identifying its characteristics to find a suitable relacement type. I wonder if the wire-ended types, usually Russian, might be easier to install than a conventional valve-base? Andy

13th Dec 2017, 11:47 am	#7
Peter.G0DRT Pentode Join Date: Dec 2009 Location: Isle of Sheppey, Kent, UK. Posts: 148	Re: German Radio Valves. Although I have details of the characteristics of these valves I have no plans to fit alternative types.If I had a radio for which these were designed for (wishful thinking) I would give it a go.I had the details from the internet in my documents but I guess they got deleted at some time.As mentioned it shouldn't be too difficult to find some matches or near matches as alternatives,possibly wire ended types. Peter.