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Post subject: 4 USD tube find
Posted: Sat Dec 31, 2016 10:27 am
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Had some time and decided to drop in to a place I pass every day and in 20 minutes time found these for 1 dollar each, , I think I may stop back for an extended visit
2x Telefunken 12at7
1x Sylvania JHS-12AT7WA
1x Sylvania USA 12AT7 [ECC81] Black Plate Top
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HAPPY NEW YEAR
MUD


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Post subject: Re: 4 USD tube find
Posted: Sat Dec 31, 2016 11:08 am
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Location: On the loo, regretting that gas station burrito.
Pretty cool find. 8)

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Post subject: Re: 4 USD tube find
Posted: Sat Dec 31, 2016 11:25 am
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Hope they test good. Those legendary tubes are great bottles.

Arjay

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Post subject: Re: 4 USD tube find
Posted: Sat Dec 31, 2016 3:37 pm
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Yes they tested well in my tube tester now to see how they do in the drive V3 and the PI V6 of my SR
mud


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Post subject: Re: 4 USD tube find
Posted: Sat Dec 31, 2016 3:50 pm
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Be sure to check them for microphonics after you plug them in.

Arjay

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Post subject: Re: 4 USD tube find
Posted: Sat Dec 31, 2016 7:47 pm
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I will give them a little chop stick tap
mud


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Post subject: Re: 4 USD tube find
Posted: Sat Dec 31, 2016 8:33 pm
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Great way to start out the new year. "Play em like ya stole em"


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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 1:55 am
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Nice, mud. How did they sound?

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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 2:03 am
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mud wrote:
Yes they tested well in my tube tester now to see how they do in the drive V3 and the PI V6 of my SR
mud


Unless they are dead or short, amps tubes test alway good in tube tester.


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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 3:44 am
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stratele52 wrote:
mud wrote:
Yes they tested well in my tube tester now to see how they do in the drive V3 and the PI V6 of my SR
mud


Unless they are dead or short, amps tubes test alway good in tube tester.


That's what a tube tester is for.

Would you rather discover a shorted tube by plugging it into a valuable amp?

Get a grip.

:roll:

Arjay

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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 3:53 am
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I write tube tester are usefull to know if tubes are short or dead or vey very weak ( almost dead )

Tube tester are useless for weak or microphonic tube.

Without knowing witch tester is used . If heater glow, some tubes tester say tube are always good. :lol:


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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 11:58 am
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Tube testers are also useful for pairing tubes.


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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 12:01 pm
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arth1 wrote:
Tube testers are also useful for pairing tubes.



If you agree with what I write ; no !


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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 1:40 pm
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stratele52 wrote:
arth1 wrote:
Tube testers are also useful for pairing tubes.



If you agree with what I write ; no !


I call "merde" on that, and anything else you may have to say on the topic of tube testers.

I'll put my trust in my TV-7A/U and leave the hokum and the tea leaves to all the doubting Thomases who don't understand the purpose of such equipment.

Bon jour et adieu!

Arjay

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Post subject: Re: 4 USD tube find
Posted: Sat Jan 21, 2017 2:43 pm
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At the risk of being uncharacteristically controversial :wink:

I lob preamp valves in without testing. They're biased to class A so there ain't much gonna go wrong (not).

Yep there's some risk but as long as they sound nice and ain't squealing, I use em. I don't even bother tapping em

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