Schiit Lyr Tube Rollers
Nov 17, 2018 at 3:21 PM Post #19,381 of 23,494
Been burning in a $70 pair of Mullard Blackburn 12AT7 1957 pair. Quite a bit better than any Blackburn 6922 variant I tried. If you like warm tubes, highly recommended. Excellent tubes on the cheap.

Which 12A_7 adapters do you use? In the market for a pair and it looks like there are several options.
 
Nov 18, 2018 at 7:59 AM Post #19,383 of 23,494
Been burning in a $70 pair of Mullard Blackburn 12AT7 1957 pair. Quite a bit better than any Blackburn 6922 variant I tried. If you like warm tubes, highly recommended. Excellent tubes on the cheap.
I'm not having much luck pairing up the mid 50s Mitcham I have. First one arrived and tested virtually dead. Refunded. 2nd one arrived from a different seller, tested great, micro as fk in the amp. Refunded...third time's a charm hopefully...
 
Nov 18, 2018 at 8:21 AM Post #19,384 of 23,494
I'm not having much luck pairing up the mid 50s Mitcham I have. First one arrived and tested virtually dead. Refunded. 2nd one arrived from a different seller, tested great, micro as fk in the amp. Refunded...third time's a charm hopefully...
Most of if not all my micro tubes were from the 50`s. The PW E180CC were the worst, went through 3 pair before I got a non micro. The 1 59 PW 6201 is horribly micro, other is micro on tap (decent), 1 55 ECC81 Heerlen is horribly micro as well, other tube is fine. I don`t test tubes first anymore except for shorts. They get a micro test first.
 
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Nov 18, 2018 at 8:21 AM Post #19,385 of 23,494
Nov 18, 2018 at 8:27 AM Post #19,386 of 23,494
I've purchased probably a half-dozen different adapters from that same seller and all have been nicely constructed, wired correctly, and delivered in a reasonable time frame (about 2.5 weeks on average).
I recommend these counterfit (sp?) tubes to go along with the adapter I linked to the new members. Maybe something like these yellow label Valvo 6201`s.
https://www.ebay.com/itm/Platinum-M...056710&hash=item5d7f6eb286:g:SigAAOSwQe1bUPKd
Or this pair made in the 1690's.
https://www.ebay.com/itm/Matched-Pa...181069?hash=item467694e88d:g:eV8AAOSwAaJZ7qH0
 
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Nov 18, 2018 at 9:57 AM Post #19,388 of 23,494
Oh Bangy Bang, how I love the smell of fresh paint in the morning....
 
Nov 18, 2018 at 11:29 AM Post #19,390 of 23,494
All 4 tubes are matched based on my visual finding of the Valvo logo. They all have a tear drop under the "A". Like they were stamped with the same exact stamp and at the same time.

Aw, come on TK. At least give him a little credit for scratching out part of the perimeter line to make it at least look like he didn't paint them last week.

Valvo.jpg
 
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Nov 18, 2018 at 11:37 AM Post #19,391 of 23,494
Or this pair made in the 1690's.

I'm pretty sure tubes were only made in China way back then. Right after they discovered gunpowder. :stuck_out_tongue:
 

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