clay
New Member
Posts: 11
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Post by clay on Nov 9, 2008 20:39:29 GMT -7
Looking for current production. Sovtek 12AX7LPS is what I have now, but I've had a problem with low level hum in a few of them. I have a JJECC83S in V2 and another LPS in the PI. Also, is the SRZ considered a "high gain" amp? ...I see some tubes on websites that say, "not recommended for use in high gain / cathode follower amps" I suspect this refers more to V2 than V1 ? Thanks in advance. Clay
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Post by rhythmeister on Nov 12, 2008 16:32:27 GMT -7
Can't help you with current production for V1. I experimented extensively and decided that V1 in all my amps would be occupied by either a NOS RFT (my SRZ-65RH) or a Brimar (my 6545). To me, the extra money was very much worth it. The RFTs are still not outlandishly priced.
Cheers, Blair
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Post by myles on Nov 25, 2008 15:48:21 GMT -7
Carl Verheyen has a Sovtek 12AX7LPS in V1 of his USA SRZ-65 and a 12AX7EH in V1 of his SRZ-65 that resides in Europe along with JJ KT77 output tubes.
The output tubes in his USA SRZ-65 are E34LS tubes and in the USA amp I now have a solid state rectifier. GZ34 in the Europe amp.
The V1 in his USA SRZ has the following specs:
1.2 plate current 1680 TC 93.3 actual true gain 1.2 plate current 1750 TC 97.2 actual true gain
The above is for side A of the tube ... top line and side B bottom line. Most of these tubes have a gain of 85 or so, at TC of 1400 or less in many instances and the plate current can be 0.8ma on average ... 33% off of spec. Sort of turns your 65 watt amp into a 35-40 watter tonewise. Carl desired a bit more headroom.
Since Carl uses a lot of pedals I selected a tube that had proper plate current before breakdown so it would not squash and compress as quickly.
If you want to hear the amp in action hit the video at
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Post by Bill on Nov 26, 2008 21:17:29 GMT -7
Always a pleasure to watch/ listen to Carl play, unbelievable talent. And the TONE...
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