Valve with nut and bolt inside - UK Vintage Radio Repair and Restoration Discussion Forum

Boom · 28th Feb 2009, 10:20 pm

I wouldn't have believed it neither. I told another forum member that I had a valve that had a nut and bolt inside it and he asked me what I was drinking. Here it is Geoff.

The print is faint. I think the valves ID is 'UU3' but have no idea what it is.

evingar · 28th Feb 2009, 10:29 pm

I've never seen anything like that - I guess some of the large transmitting valves might have had bolts in them !

You just have to hope they tightened it up well

MALC SCOTT · 28th Feb 2009, 10:36 pm

Hi, the UU3 i think is an early full wave rectifier valve.

Peter.N. · 28th Feb 2009, 10:45 pm

That's a new one on me! Yes, I would concur, a full wave rectifier, U= half wave rectifier in Mazda speak.

kalee20 · 28th Feb 2009, 10:51 pm

Cor Blimey!

We just need another member now to put up a photo of a valve with a Jubilee clip inside...

Heatercathodeshort · 28th Feb 2009, 11:01 pm

Have a look inside an AC/PEN....Another bright little nut and bolt! Your not that far off the jubilee clip. The bolt tightens a metal band securing the electrode assembly to the glass pinch. John.

Lloyd 1985 · 28th Feb 2009, 11:08 pm

Hi

I've got some valves somewhere with exactly that in them! I think they are AC/pen valves.. my AC86's have nuts and bolts in both the rectifiers and the output valves!

regards,
Lloyd.

60 oldjohn · 28th Feb 2009, 11:15 pm

I was looking here http://www.valve-museum.org and I saw a valve with nut and bolt, can,t be sure but it may have been a transmitter valve. All sorts of weired and wonderful valves on this great site. John. I should have added the site contains lots of excellent closeup photographs.

Geoff 555 · 28th Feb 2009, 11:21 pm

Thank you very much for that, goodness you learn something every Day.
Cheers.
Geoff.

russell_w_b · 28th Feb 2009, 11:22 pm

Quote:

Originally Posted by evingar

I've never seen anything like that - I guess some of the large transmitting valves might have had bolts in them !

They certainly have screws in them. This is one of the 'smaller' large transmitting valves, a cathode-follower type 3Z222EW (now re-used as a nice table-lamp

), and the screw-heads can clearly be seen.

I have a feeling that traditional nut/bolt construction is used in the likes of the BY1144 (makes sense with the weight of materials involved: different animals to wee rx valves)!

Heatercathodeshort · 28th Feb 2009, 11:41 pm

Quote:

Originally Posted by kalee20

We just need another member now to put up a photo of a valve with a Jubilee clip inside...

Well I've gone through my stock of Mazda AC/PEN's and have indeed discovered one with a Jubilee clip inside. Its described in the 1936 'Mazda Book of Brimsdown Inventions' as a 'Heat Deflector'. You do find the strangest things inside radio valves.. Regards, John.

The General · 28th Feb 2009, 11:51 pm

Hmm, yes...
Nicely done...

Mark.

kalee20 · 1st Mar 2009, 12:17 am

Flippin' heck!

Well, at least we can justifiably say that valves once formed the nuts and bolts of the electronics industry...

G8UWM-MildMartin · 1st Mar 2009, 2:58 am

I've seen a nut & bolt inside an STV280 (/40 or /80? I forget.)

ppppenguin · 1st Mar 2009, 8:51 am

Quote:

Originally Posted by Heatercathodeshort

Well I've gone through my stock of Mazda AC/PEN's and have indeed discovered one with a Jubilee clip inside. Its described in the 1936 'Mazda Book of Brimsdown Inventions' as a 'Heat Deflector'. You do find the strangest things inside radio valves.. Regards, John.

John it's the wrong month. Today is 1st March

Find us a valve with a leek or daffodil inside

Heatercathodeshort · 1st Mar 2009, 10:40 am

Don't you believe it Jeffery!
Seriously though, that really is a splendid UU3. I have an Ultra 'Blue Fox' that uses the UU3 and the AC/PEN. They are superb Mazda valves and very rarely fail. I think they were the first range of indirectly heated, Mazda AC mains valves released around 1933.The young ladies that assembled these valves all those years ago would probably be very amused at our comments. Regards, John.

GrimJosef · 1st Mar 2009, 11:29 am

Maybe this is going OT (and if it is please let me know mods and I'll re-post it to a new "Valve with dangly bit inside" thread). But here's a pic of a brand new valve. The top mica on these Russian KT66s (branded Genalex Gold Lion - yours for ~£30 each) is centred in the envelope by four spring clips. Or at least it should be. In this case, however, one fell loose before the electrodes were inserted and the glassware was sealed up. And it seems even modern QA processes aren't infallible, so it made it all the way from the factory to the distributors in the US and then back here to me.

This is just a small defect and the valve seems to work fine but I wonder if any other forum members have other, perhaps more extreme, examples ?

Cheers,

GJ

Aerodyne · 1st Mar 2009, 11:47 am

Not uncommon, David (or should that be nut uncommon?) - I used a picture of a similar valve as the background frontispiece in my 'Restoring valve radios' books! Dunno what you do if it works loose, though...
-Tony

Tim · 1st Mar 2009, 10:18 pm

I have a valve with a nut and bolt inside too. ISTR it's either a similar rectifier valve or AC/PEN

Paul_RK · 2nd Mar 2009, 12:20 am

And here's a vintage Mazda PP5/400 boasting a pair of nuts and bolts. It's the one valve I have that feels positively top-heavy from the weight of the electrode assembly.

Paul

28th Feb 2009, 10:20 pm	#1
Boom Retired Dormant Member Join Date: Jan 2007 Location: Westbury, Wiltshire, UK. Posts: 2,451	Valve with nut and bolt inside I wouldn't have believed it neither. I told another forum member that I had a valve that had a nut and bolt inside it and he asked me what I was drinking. Here it is Geoff. The print is faint. I think the valves ID is 'UU3' but have no idea what it is. Attached Thumbnails

28th Feb 2009, 10:29 pm	#2
evingar Octode Join Date: Oct 2003 Location: Newbury, Berkshire, UK. Posts: 1,770	Re: Valve with nut and bold inside I've never seen anything like that - I guess some of the large transmitting valves might have had bolts in them ! You just have to hope they tightened it up well __________________ Chris

28th Feb 2009, 10:36 pm	#3
MALC SCOTT Octode Join Date: Aug 2006 Location: Willington, County Durham, UK. Posts: 1,499	Re: Valve with nut and bold inside Hi, the UU3 i think is an early full wave rectifier valve. __________________ Malc Scott

28th Feb 2009, 10:45 pm	#4
Peter.N. Dekatron Join Date: Jul 2008 Location: Charmouth, Dorset, UK. Posts: 3,601	Re: Valve with nut and bold inside That's a new one on me! Yes, I would concur, a full wave rectifier, U= half wave rectifier in Mazda speak.

28th Feb 2009, 10:51 pm	#5
kalee20 Dekatron Join Date: Feb 2007 Location: Lynton, N. Devon, UK. Posts: 7,088	Re: Valve with nut and bolt inside Cor Blimey! We just need another member now to put up a photo of a valve with a Jubilee clip inside...

28th Feb 2009, 11:01 pm	#6
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Valve with nut and bolt inside Have a look inside an AC/PEN....Another bright little nut and bolt! Your not that far off the jubilee clip. The bolt tightens a metal band securing the electrode assembly to the glass pinch. John. Last edited by Heatercathodeshort; 28th Feb 2009 at 11:07 pm.

28th Feb 2009, 11:08 pm	#7
Lloyd 1985 Nonode Join Date: Jun 2008 Location: Coningsby, Lincolnshire, UK. Posts: 2,820	Re: Valve with nut and bolt inside Hi I've got some valves somewhere with exactly that in them! I think they are AC/pen valves.. my AC86's have nuts and bolts in both the rectifiers and the output valves! regards, Lloyd.

28th Feb 2009, 11:15 pm	#8
60 oldjohn Dekatron Join Date: Dec 2004 Location: East Yorkshire, UK. Posts: 3,990	Re: Valve with nut and bolt inside I was looking here http://www.valve-museum.org and I saw a valve with nut and bolt, can,t be sure but it may have been a transmitter valve. All sorts of weired and wonderful valves on this great site. John. I should have added the site contains lots of excellent closeup photographs. Last edited by 60 oldjohn; 28th Feb 2009 at 11:27 pm.

28th Feb 2009, 11:21 pm	#9
Geoff 555 Heptode Join Date: Jan 2008 Location: Bristol, UK. Posts: 981	Re: Valve with nut and bolt inside Thank you very much for that, goodness you learn something every Day. Cheers. Geoff.

28th Feb 2009, 11:51 pm	#12
The General Hexode Join Date: Apr 2007 Location: Milton Keynes, Buckinghamshire, UK. Posts: 329	Re: Valve with nut and bolt inside Hmm, yes... Nicely done... Mark.

1st Mar 2009, 12:17 am	#13
kalee20 Dekatron Join Date: Feb 2007 Location: Lynton, N. Devon, UK. Posts: 7,088	Re: Valve with nut and bolt inside Flippin' heck! Well, at least we can justifiably say that valves once formed the nuts and bolts of the electronics industry...

1st Mar 2009, 2:58 am	#14
G8UWM-MildMartin Heptode Join Date: Jan 2004 Location: Stockport, Greater Manchester, UK. Posts: 827	Re: Valve with nut and bolt inside I've seen a nut & bolt inside an STV280 (/40 or /80? I forget.)

1st Mar 2009, 10:40 am	#16
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Valve with nut and bolt inside Don't you believe it Jeffery! Seriously though, that really is a splendid UU3. I have an Ultra 'Blue Fox' that uses the UU3 and the AC/PEN. They are superb Mazda valves and very rarely fail. I think they were the first range of indirectly heated, Mazda AC mains valves released around 1933.The young ladies that assembled these valves all those years ago would probably be very amused at our comments. Regards, John.

1st Mar 2009, 11:29 am	#17
GrimJosef Dekatron Join Date: Sep 2007 Location: Oxfordshire, UK. Posts: 4,311	Re: Valve with nut and bolt inside Maybe this is going OT (and if it is please let me know mods and I'll re-post it to a new "Valve with dangly bit inside" thread). But here's a pic of a brand new valve. The top mica on these Russian KT66s (branded Genalex Gold Lion - yours for ~£30 each) is centred in the envelope by four spring clips. Or at least it should be. In this case, however, one fell loose before the electrodes were inserted and the glassware was sealed up. And it seems even modern QA processes aren't infallible, so it made it all the way from the factory to the distributors in the US and then back here to me. This is just a small defect and the valve seems to work fine but I wonder if any other forum members have other, perhaps more extreme, examples ? Cheers, GJ Attached Thumbnails

1st Mar 2009, 11:47 am	#18
Aerodyne Octode Join Date: Jun 2004 Location: Hampton Vale, Peterborough, UK. Posts: 1,698	Re: Valve with nut and bolt inside Not uncommon, David (or should that be nut uncommon?) - I used a picture of a similar valve as the background frontispiece in my 'Restoring valve radios' books! Dunno what you do if it works loose, though... -Tony

1st Mar 2009, 10:18 pm	#19
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,310	Re: Valve with nut and bolt inside I have a valve with a nut and bolt inside too. ISTR it's either a similar rectifier valve or AC/PEN __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

2nd Mar 2009, 12:20 am	#20
Paul_RK Dekatron Join Date: Nov 2003 Location: Fakenham, Norfolk, UK. Posts: 4,259	Re: Valve with nut and bolt inside And here's a vintage Mazda PP5/400 boasting a pair of nuts and bolts. It's the one valve I have that feels positively top-heavy from the weight of the electrode assembly. Paul Attached Thumbnails