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Post by myles on Sept 21, 2008 18:41:45 GMT -7
This is a post I answered on another forum that I thought may be of interest to some of you:
Myles, Thanks for the advice, on the 12AT7's. I am still trying out different tubes and the Tung Sol 12AX7 may be all the Agression I need. Brendan
Brendan,
The current batch of Tung Sol reissues are great tubes and some of the most consistently high in gain of today's production tubes. The rightmost column is true, actual gain. Most of today's tubes are 75-85, most around 80 actually, so these are a great batch. Having a tube 5 points in gain lower than another in V1 will make a difference most folks can hear easily. Having a tube with plate current output down 20% from spec (spec is 1.2mA) as a phase inverter will also impact things a lot in most amps:
Design spec is:
1600 TC 1.2mA plate current 100 gain
Plate Current TC Gain
1.0 1470 0.0155 94.8 1.4 1840 0.018 102.2 1.1 1320 0.015 88.0 1.1 1510 0.016 94.4 1.1 1560 0.018 86.7 0.9 1490 0.016 93.1 0.8 1340 0.015 89.3 1.0 1560 0.018 86.7 1.1 1630 0.0175 93.1 1.3 1740 0.0185 94.1 1.2 1650 0.018 91.7 1.0 1540 0.017 90.6 1.0 1400 0.015 93.3 1.2 1670 0.018 92.8 1.4 1730 0.018 96.1 1.5 1910 0.019 100.5
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Post by Fiestared69 on Sept 21, 2008 18:50:22 GMT -7
Thanks a bunch for the info!!!
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Post by myles on Sept 21, 2008 19:09:58 GMT -7
Thanks a bunch for the info!!! You are welcome. In the future I will be publishing a lot of these test results here.
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Post by azatplayer on Sept 22, 2008 0:49:26 GMT -7
Huh! My new handwired Vox has Tungsol's in it, cool!
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Post by myles on Sept 22, 2008 8:22:55 GMT -7
Huh! My new handwired Vox has Tungsol's in it, cool! Thanks for this info .... I learned something cool from you ... that in the handwired Vox they are not going the cheap route on tubes! That is a cool thing to know.
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Post by zane on Sept 22, 2008 14:08:03 GMT -7
I had them in my Oldfield Club D'lux amp... really liked them, I've got a set sitting here I may try them in my RXJr ;^)
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Post by azatplayer on Sept 24, 2008 14:22:00 GMT -7
Huh! My new handwired Vox has Tungsol's in it, cool! Thanks for this info .... I learned something cool from you ... that in the handwired Vox they are not going the cheap route on tubes! That is a cool thing to know. Actually Myles, its got 2 Tungsols, a sovtek in the PI, and EH outputs and a JJ Rec. The EF86 is covered with a condom so cant tell what that is Very sweet tone.I like
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Post by myles on Sept 24, 2008 14:53:58 GMT -7
Thanks for this info .... I learned something cool from you ... that in the handwired Vox they are not going the cheap route on tubes! That is a cool thing to know. Actually Myles, its got 2 Tungsols, a sovtek in the PI, and EH outputs and a JJ Rec. The EF86 is covered with a condom so cant tell what that is Very sweet tone.I like Well, if you ever are coming to L.A. bring them here and I will test and trace them so you know what they are actually doing
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Post by azatplayer on Sept 25, 2008 0:34:37 GMT -7
Mate my wife and i could really do with a boat holiday!
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Post by myles on Sept 25, 2008 9:46:36 GMT -7
Mate my wife and i could really do with a boat holiday! If you and the wife are in L.A. please drop me a note and I will make sure to take you all over the place.
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Post by azatplayer on Sept 25, 2008 13:58:35 GMT -7
Awesome Myles! We're planning to travel to the States next year. I fully intend to look up a lot of the forum guys. Will be very cool! Cheers buddy
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Post by myles on Sept 26, 2008 10:02:15 GMT -7
Awesome Myles! We're planning to travel to the States next year. I fully intend to look up a lot of the forum guys. Will be very cool! Cheers buddy I'll be more than happy to take you on the "tour".
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Post by brad737 on Sept 26, 2008 11:47:30 GMT -7
I've heard great things about the Tung-Sol 12ax7. I bought a set to put in one of my amps, but the little buggers didn't fit in the aluminum tube sockets. I wonder how they compare to the 9th gen Chinese?
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Post by Fender Bender on Oct 1, 2008 9:29:45 GMT -7
The current batch of Tung Sol reissues... Myles, Maybe a stupid question, but if I where to order some of these Tung Sol 12AX7s, how would I know it was from this batch..?
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Post by myles on Oct 14, 2008 9:51:57 GMT -7
The current batch of Tung Sol reissues... Myles, Maybe a stupid question, but if I where to order some of these Tung Sol 12AX7s, how would I know it was from this batch..? There is really no way ... some runs have date codes but many do not.
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