12y4g - UK Vintage Radio Repair and Restoration Discussion Forum

kelvinmunson · 12th Jul 2011, 2:00 pm

Is it correct that the 12Y4 would be the same valve as the 12Y4G ?

Kelvin

Herald1360 · 12th Jul 2011, 5:25 pm

If they follow the usual meanings for no suffix and -G suffix, yes.... but the no suffix will be a metal can and the -G suffix a shouldered glass bottle, so there might be problems fitting a -G physically into a no suffix space.

Edit- actually it seems that a 12Y4 is a M-O double diode in a shouldered glass bottle, not an American metal cased type. I can't find any reference to a 12Y4G. Maybe someone jumped to the same conclusion as myself and just added a -G suffix?

kelvinmunson · 12th Jul 2011, 5:32 pm

Thanks for the info Chris; looks like I won't have a problem then, as the original is a 12Y4G and I am looking for a replacement............... can't find a -G but may be able to get hold of a 12Y4

Thanks, Kelvin

Herald1360 · 12th Jul 2011, 11:44 pm

This would be in your 52 set, presumably? Possibly the only common application for the type......

http://www.radiomuseum.org/tubes/tube_12y4.html

kelvinmunson · 13th Jul 2011, 7:33 am

It certainly is

Fixed the PSU and the 52 is now up and running.

Previous owner has replaced a dud 12Y4G with a couple of diodes and I thought I'd reverse the modification.

Plus the xtal calibrator doesn't seem to function at all.

I got hold of the R.E.M.E service manual so I can go through the set and check everything is A1.

Kelvin

Herald1360 · 13th Jul 2011, 1:06 pm

CV(0)523 seems to be the forces equivalent for 12Y4.

If you want lots:

http://cgi.ebay.co.uk/12Y4-CV523-Mar...-/190400964308

Or Billington looks like a better bet

https://secure25.securewebsession.co...d081346390e8ec

kelvinmunson · 13th Jul 2011, 1:37 pm

Thanks for the links............... I don't know what I'd do with 10-off.

Price at Billington is OK but with a minimum order of £50; I'll wait untill I need a few more

12th Jul 2011, 2:00 pm	#1
kelvinmunson Pentode Join Date: Jul 2010 Location: Scunthorpe, Lincolnshire, UK. Posts: 159	12y4g Is it correct that the 12Y4 would be the same valve as the 12Y4G ? Kelvin

12th Jul 2011, 5:25 pm	#2
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: 12y4g If they follow the usual meanings for no suffix and -G suffix, yes.... but the no suffix will be a metal can and the -G suffix a shouldered glass bottle, so there might be problems fitting a -G physically into a no suffix space. Edit- actually it seems that a 12Y4 is a M-O double diode in a shouldered glass bottle, not an American metal cased type. I can't find any reference to a 12Y4G. Maybe someone jumped to the same conclusion as myself and just added a -G suffix? __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O Last edited by Herald1360; 12th Jul 2011 at 5:36 pm.

12th Jul 2011, 5:32 pm	#3
kelvinmunson Pentode Join Date: Jul 2010 Location: Scunthorpe, Lincolnshire, UK. Posts: 159	Re: 12y4g Thanks for the info Chris; looks like I won't have a problem then, as the original is a 12Y4G and I am looking for a replacement............... can't find a -G but may be able to get hold of a 12Y4 Thanks, Kelvin Last edited by kelvinmunson; 12th Jul 2011 at 5:33 pm. Reason: Typo

12th Jul 2011, 11:44 pm	#4
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: 12y4g This would be in your 52 set, presumably? Possibly the only common application for the type...... http://www.radiomuseum.org/tubes/tube_12y4.html __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

13th Jul 2011, 7:33 am	#5
kelvinmunson Pentode Join Date: Jul 2010 Location: Scunthorpe, Lincolnshire, UK. Posts: 159	Re: 12y4g It certainly is Fixed the PSU and the 52 is now up and running. Previous owner has replaced a dud 12Y4G with a couple of diodes and I thought I'd reverse the modification. Plus the xtal calibrator doesn't seem to function at all. I got hold of the R.E.M.E service manual so I can go through the set and check everything is A1. Kelvin

13th Jul 2011, 1:06 pm	#6
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: 12y4g CV(0)523 seems to be the forces equivalent for 12Y4. If you want lots: http://cgi.ebay.co.uk/12Y4-CV523-Mar...-/190400964308 Or Billington looks like a better bet https://secure25.securewebsession.co...d081346390e8ec __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

13th Jul 2011, 1:37 pm	#7
kelvinmunson Pentode Join Date: Jul 2010 Location: Scunthorpe, Lincolnshire, UK. Posts: 159	Re: 12y4g Thanks for the links............... I don't know what I'd do with 10-off. Price at Billington is OK but with a minimum order of £50; I'll wait untill I need a few more