Repairing broken pins on valuable tube...

nickds1 · 20th May 2011, 03:00 PM

Hi, I have a valuable & rare tube with a broken pin - its sheared at the glass interface, but is still gas-tight. Before you ask, it came this way

Can this be repaired by a glass/neon shop, i.e. have a new bit fixed to the end of the old? Ideas?

Thanks

Alastair E · 20th May 2011, 04:33 PM

Hmm....

I wouldnt have thought so....

I used a pin (sewing type) a small spring and a connecting lead, modded up a socket so the pin protruded against the 'stump' of the broken tube-pin on a CRT many years ago.

It was a G1 pin so no current--it worked fine....

All according what pin/current the tube draws through the broken pin will govern success of this method--but at least you stand a chance without possible further breakage of the valve itself....

poynton · 20th May 2011, 05:03 PM

Sell it on Ebay !!

If it is really valuable, some idiot will pay for it even broken.

Put it on at an absurdly high Buy-it-Now price with offers.

Andy

.

Alastair E · 20th May 2011, 05:27 PM

Out of curiosity, What valve is it...?

nickds1 · 08:01 PM

Quote:

Originally Posted by Alastair E

Out of curiosity, What valve is it...?

CSF F9020AA - a display rather than audio tube, extraordinarily rare, typical cost (if you ever find one) somewhere north of USD 350 (and have gone for over USD 500).

Anyway, there's enough usable pin stub for get a sprung pin onto, so made a holder from acrylic and its now fine (pin current is only 5mA).

Cheers

20th May 2011, 03:00 PM	#1
nickds1 diyAudio Member Join Date: Aug 2005	Repairing broken pins on valuable tube... Hi, I have a valuable & rare tube with a broken pin - its sheared at the glass interface, but is still gas-tight. Before you ask, it came this way Can this be repaired by a glass/neon shop, i.e. have a new bit fixed to the end of the old? Ideas? Thanks __________________ Nicko "The whole plan hinged upon the natural curiosity of potatoes" - S. Lem

20th May 2011, 05:03 PM	#3
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	Sell it on Ebay !! If it is really valuable, some idiot will pay for it even broken. Put it on at an absurdly high Buy-it-Now price with offers. Andy . __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

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20th May 2011, 04:33 PM	#2
Alastair E diyAudio Member Join Date: Feb 2004 Location: South Wales	Hmm.... I wouldnt have thought so.... I used a pin (sewing type) a small spring and a connecting lead, modded up a socket so the pin protruded against the 'stump' of the broken tube-pin on a CRT many years ago. It was a G1 pin so no current--it worked fine.... All according what pin/current the tube draws through the broken pin will govern success of this method--but at least you stand a chance without possible further breakage of the valve itself....

20th May 2011, 05:27 PM	#4
Alastair E diyAudio Member Join Date: Feb 2004 Location: South Wales	Out of curiosity, What valve is it...?

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