Schiit Lyr Tube Rollers
Mar 9, 2019 at 2:47 PM Post #20,088 of 23,446

fotomeow

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Mar 10, 2019 at 12:14 PM Post #20,090 of 23,446

koover

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How are the 12AT7/ECC81 tubes in the MJ2? Are these good tubes?
Any suggestion if these bad boys are good? I'm waiting on an adapter from the slow boat from China so I can test out the set that @Guidostrunk sold me on the cheap. Looking forward to hearing them. They're not NOS and test a bit low I believe if I'm reading them right, but what I bought them for, it gives me a good idea what they'll sound like.
 
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Mar 10, 2019 at 2:59 PM Post #20,091 of 23,446

OldSkool

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I love the 12AT7's in my WA2, particularly the TFK ECC801S. I also love my 6SN7GT Bad Boys too. Both are killer, IMO.
 
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Mar 10, 2019 at 3:23 PM Post #20,092 of 23,446

TK16

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If anybody is interested in any of my tubes, pulling them this week for a couple months, may be adding more to the FS signature, but not for about 2 months as well.
Edit: lowered the price on the pair of the Siemens CCa with the tube at 1 tube at 11,000-8,100, other tube tests around 11,000-10,000 on the other (good testing) Hickok 752. Essentially buying 1 good tube and other may or not work fine. I put about 500 hours on this set and worked fine in Lyr 2, dac. Did not know testing numbers until after I put all these hours on it. If you have a lot of tubes, I recommend getting a tester.
 
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Mar 10, 2019 at 8:48 PM Post #20,093 of 23,446

fotomeow

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Ya, what do you all suggest for tube testers?

I’ve done some research, the Hickok 539c overpriced “holy grail” $1500. 2 transformers reportedly allows higher accuracy. +/- 5-10%
The Hickok 539b, $500-750. 2 transformers. Accuracy reportedly +/- 5-10%
Hickok 539a- not sure

Hickok 752- industrial version - 1 transformer, accuracy reportedly +/-15%
(Hickok) TV3 - TV7/TU7 - TV10 (sp) - Military versions, one transformer, accuracy reported +/- 15%

Then many other brands, Eico, Stark, B & K, etc.

Just not sure how to sort through them for a reliable machine that will test all the different types of tubes we roll in audio
Under $500 ??
 
Mar 10, 2019 at 9:16 PM Post #20,094 of 23,446

bcowen

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Ya, what do you all suggest for tube testers?

I’ve done some research, the Hickok 539c overpriced “holy grail” $1500. 2 transformers reportedly allows higher accuracy. +/- 5-10%
The Hickok 539b, $500-750. 2 transformers. Accuracy reportedly +/- 5-10%
Hickok 539a- not sure

Hickok 752- industrial version - 1 transformer, accuracy reportedly +/-15%
(Hickok) TV3 - TV7/TU7 - TV10 (sp) - Military versions, one transformer, accuracy reported +/- 15%

Then many other brands, Eico, Stark, B & K, etc.

Just not sure how to sort through them for a reliable machine that will test all the different types of tubes we roll in audio
Under $500 ??

539C overpriced? Depends on what you're comparing it to. It's half the price of an Amplitrex AT-1000. :laughing: The 539B is more similar to the C than different. I just picked one up in very nice condition for $600 and tuning it up now. The 752 / 752A is a great tester. My favorite because I'm lazy and it tests the 2nd triode of a twin-triode tube with the press of a button. I've had one for 20 years and it's still my main tester. But you'll pay as much as a 539B for one in good condition, and the 539B and C are more robust machines.

Others:
Triplett 3444 (or Weston 981...same machine). Pricier than the 539C, but a very capable machine.
Heathkit TT1 or TT1-A. Circuitry is a direct copy of the Triplett. Big downside is they were only sold as kits so the construction quality is dependent on the skills of whoever put it together. A poor man's 3444 that go for as little as $325 and most are in very good shape cosmetically. The risk is finding a rat's nest of crap inside after Joe "I have a soldering iron" guy got through with it.
B&K 747 or 747B -- B&K's tube testing flagship, fully solid state, and usually go in the $400 - $500 price range. Most are in decent shape.
 
Mar 10, 2019 at 9:25 PM Post #20,096 of 23,446

Ripper2860

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You had to go and reopen that wound didn't you? :smile:
 
Mar 10, 2019 at 9:54 PM Post #20,097 of 23,446

bcowen

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@bcowen, has the black box been found yet on that Heathkit? Would make it easier finding all the bits and pieces spread around the country? RIP.

The seller (AKA boneheadeous maximus) had what's left of it returned to him. He'll probably re-list it 'as-is' for $50 and then charge $200 for packaging. :relaxed:
 
Mar 10, 2019 at 10:00 PM Post #20,098 of 23,446

TK16

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Ya, what do you all suggest for tube testers?

I’ve done some research, the Hickok 539c overpriced “holy grail” $1500. 2 transformers reportedly allows higher accuracy. +/- 5-10%
The Hickok 539b, $500-750. 2 transformers. Accuracy reportedly +/- 5-10%
Hickok 539a- not sure

Hickok 752- industrial version - 1 transformer, accuracy reportedly +/-15%
(Hickok) TV3 - TV7/TU7 - TV10 (sp) - Military versions, one transformer, accuracy reported +/- 15%

Then many other brands, Eico, Stark, B & K, etc.

Just not sure how to sort through them for a reliable machine that will test all the different types of tubes we roll in audio
Under $500 ??
Maybe make an offer on this? Sure glad I didn't lie on the testing numbers on the pair of tubes I sold you know that you are looking at testers. Ha.
https://www.ebay.com/itm/Hickok-TV-...-Calibrated-Accurate-Works-Great/153410883241
You might want to look at getting a dual triode switch so you don't have to change the dials checking the 2nd triode, unless you get a 752/A.
 
Mar 10, 2019 at 10:38 PM Post #20,099 of 23,446

fotomeow

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Maybe make an offer on this? Sure glad I didn't lie on the testing numbers on the pair of tubes I sold you know that you are looking at testers. Ha.
https://www.ebay.com/itm/Hickok-TV-...-Calibrated-Accurate-Works-Great/153410883241
You might want to look at getting a dual triode switch so you don't have to change the dials checking the 2nd triode, unless you get a 752/A.

Ya, I’ve started almost stockpiling tubes for rolling, .... must stop ...
Checked out the tube tester, trying to figure out if I should buy it.

TK16, I understand what you mean about the convenience of checking the 2nd triode,
But I’m it sure which machines have it, and which don’t. Other than your Hickok 752 of course!
 
Mar 10, 2019 at 10:39 PM Post #20,100 of 23,446

Bamadawg

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Check out this tester kit:

https://www.dos4ever.com/uTracer3/uTracer3_pag11.html


Ya, what do you all suggest for tube testers?

I’ve done some research, the Hickok 539c overpriced “holy grail” $1500. 2 transformers reportedly allows higher accuracy. +/- 5-10%
The Hickok 539b, $500-750. 2 transformers. Accuracy reportedly +/- 5-10%
Hickok 539a- not sure

Hickok 752- industrial version - 1 transformer, accuracy reportedly +/-15%
(Hickok) TV3 - TV7/TU7 - TV10 (sp) - Military versions, one transformer, accuracy reported +/- 15%

Then many other brands, Eico, Stark, B & K, etc.

Just not sure how to sort through them for a reliable machine that will test all the different types of tubes we roll in audio
Under $500 ??
 

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