Author Topic: Tube socket extenders?  (Read 8095 times)

Offline xenithon

Tube socket extenders?
« on: January 12, 2009, 06:33:11 PM »
Hi all. Is there perhaps such a thing as tube socket extenders (I think sometimes called socket savers)? I just got some NOS UK made G.E.C 6080 tubes and they fit in the sockets, but the tube does not go all the way in as the base is a little too large for the cutout - picture attached. Is it unsafe to run like this? Can it damage the amp and/or tubes? Is there such a thing which will "extend" the sockets?

Cheers
X

Offline Hi-Phibian

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Re: Tube socket extenders?
« Reply #1 on: January 12, 2009, 07:39:18 PM »
Not sure. Maybe another octal socket with copper pins soldered to the lugs with the lug part heatshrinked. no real risk "as is" I think, they my just get knocked out easily and pick up more vibes from the chassis (not with cans I guess)...
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Offline xenithon

Re: Tube socket extenders?
« Reply #2 on: January 12, 2009, 08:00:56 PM »
Hey there. They are actually quite snug as is and the tube held relatively well in place - the brown plastic base sits flush on top of and level with the perimeter of the cutout. The thing I believe I would need are indeed called "socket savers", often used on tube testers. Highly doubt there are in locally though  :-\


Offline Hi-Phibian

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Re: Tube socket extenders?
« Reply #3 on: January 12, 2009, 08:17:29 PM »
The thing I believe I would need are indeed called "socket savers", often used on tube testers. Highly doubt there are in locally though  :-\



Seriously doubt that yes, would have thought they are like Dinosaur eggs and no longer made...
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Offline ghostinthemachine

Re: Tube socket extenders?
« Reply #4 on: January 13, 2009, 07:42:29 AM »
With a little imagination you can make your own.  :)

Buy some sockets
Get some shot tubes with the correct pin set
Good quality wire
Some heat-resistant epoxy
and a good dose of innovation


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Offline Hi-Phibian

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Re: Tube socket extenders?
« Reply #5 on: January 13, 2009, 08:17:27 AM »
I would just use a socket and brass or copper pins perhaps a spacer with holes for lugs and yes, epoxy...

using an old tube you will need good solder, plenty heat and flux as it is harder then you think to solder nicely on the "inside" of the valve base...

I made some plug in diode replacent rectofiers once. (sounded kak evwn though they were my then fave high speed soft recovery types). they were a swine to solder on a smashed EL34 base...
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Offline xenithon

Re: Tube socket extenders?
« Reply #6 on: January 13, 2009, 08:40:38 AM »
Well, can get the above socket savers for around $30/pair so it is not a trainsmash; with my soldering skills it would certainly be safer than attempting DIY :p

Offline Ampdog

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Re: Tube socket extenders?
« Reply #7 on: January 14, 2009, 11:47:53 PM »
Xenithon,

Not sure whether I am not missing something here ...

I am unsure as to how exactly it happens that a tube can go close enough to a socket to make pin contact, but not go in 'all the way'. When it comes to DIY-ing, is it not possible to remove the original sockets and remount them on top of the chassis, or use different octal sockets that could be used like that? Surely less complicated than making an adaptor? I take it that in your case the tubes do not drop 'right through' as in e.g. Quad II, or you would not be able to fit them at all to begin with.

????
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Offline xenithon

Re: Tube socket extenders?
« Reply #8 on: January 15, 2009, 06:00:00 AM »
Hey there. The amp's sockets are not flush with the surface - there are cutouts in the top plate and the sockets sit ~5mm below, you can perhaps call them "countersunk". Most tube bases are wide enough to clear this hole as can be seen with the stock tubes installed in this image:



As you can see in the image attached to the first post though, that 6080 tube has an especially wide base. The base "hits" the perimeter of the cutout preventing it from going further, but the pins are long enough to go in partially and make contact with the sides of the pin sockets (where it looks like the conductive material is located). This is not a DIY amp hence I cannot remove and remount sockets.

Regards
X

Offline Ampdog

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Re: Tube socket extenders?
« Reply #9 on: January 25, 2009, 02:33:39 AM »
Ah, thanks. Then an extender it is.

But still on practicality. Since not much height is required, and to keep things from appearing gross, could it be possible to solder a PC octal socket directly into the existing sockets, or thicken its pins so as to plug in without resorting to a complete socket + plug adapter?
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Offline xenithon

Re: Tube socket extenders?
« Reply #10 on: January 25, 2009, 07:40:08 AM »
Hey there. Thanks for the tip - I am going to try sell the tubes (they're NOS and unused) rather than fiddle with what is bound to be an inelegant solution. There are plenty more choices of power tubes for me to try so I won't break my head or risk my amp to get these to work ;)

Offline Ampdog

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Re: Tube socket extenders?
« Reply #11 on: January 26, 2009, 07:41:43 PM »
Probably a very good idea.
Audio must be the only branch of engineering where lack of basics' knowledge is considered a superior form of wisdom. (Anon)