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Post by jaybee on Jan 27, 2006 13:24:56 GMT -7
The subject says it all. I've read a few threads lately singing high praises for this tube. Has anyone put them in a Z-28? Mine has the stock GT's and I'm curious about what kind of change would happen.
Does the amp need to be rebiased in this case?
thanks!
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Post by arniez on Jan 27, 2006 19:04:25 GMT -7
The amp would definitely need a rebias. I asked the same question several weeks ago, it seems no one has really experimented with them in a Z28. FWIW the genral buzz is that the JJ's are more 6l6ish than the stock 6v6's ArnieZ
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Post by jaybee on Jan 27, 2006 22:20:57 GMT -7
Thanks Arniez!
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Post by myles on Feb 9, 2006 13:24:39 GMT -7
The amp would definitely need a rebias. I asked the same question several weeks ago, it seems no one has really experimented with them in a Z28. FWIW the genral buzz is that the JJ's are more 6l6ish than the stock 6v6's ArnieZ I have been playing with these in a Z-28 and Fargen Blackbird. They are great tubes and yes ... more like a 6L6 in some ways. They are very strong tubes and handle very high voltages. In a Z-28 I bias them at 24-25 milliamps. I don't know if they are "better" than the 6V6R (EH) but they are different and stronger. It will boil down to personal taste. I also like how the 6V6S feeds the output of a overdriven 12AX7R2 (Sovtek 12AX7LPS) more than with the 12AX7M if you use a Tele with stock vintage pickups or a Gretsch with Filtertrons. With a Rickenbacker 360-12 I prefer the ECC803 JJ as the phase inveter. With Strats and Les Pauls / PRS / humbuckers I prefer the 12AX7M when using the 6V6S as the output tube in the Z-28. Most output tubes are never driven too far their design limits actually, especially if the amp is not turned all the way up. What you are actually hearing in the output section breaking up is how the phase inverter is crapping out and distorting in many cases.
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Post by evildoc on Feb 19, 2006 8:19:13 GMT -7
I also like how the 6V6S feeds the output of a overdriven 12AX7R2 (Sovtek 12AX7LPS) more than with the 12AX7M if you use a Tele with stock vintage pickups or a Gretsch with Filtertrons. With a Rickenbacker 360-12 I prefer the ECC803 JJ as the phase inveter. With Strats and Les Pauls / PRS / humbuckers I prefer the 12AX7M when using the 6V6S as the output tube in the Z-28. Myles, can you explain this? How do the 6v6s affect what's going on in the PI? I suspect it has something to do with the power tubes creating some kind of current draft....but I'd love a more technical explanation...
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Post by myles on Feb 21, 2006 18:48:20 GMT -7
I also like how the 6V6S feeds the output of a overdriven 12AX7R2 (Sovtek 12AX7LPS) more than with the 12AX7M if you use a Tele with stock vintage pickups or a Gretsch with Filtertrons. With a Rickenbacker 360-12 I prefer the ECC803 JJ as the phase inveter. With Strats and Les Pauls / PRS / humbuckers I prefer the 12AX7M when using the 6V6S as the output tube in the Z-28. Myles, can you explain this? How do the 6v6s affect what's going on in the PI? I suspect it has something to do with the power tubes creating some kind of current draft....but I'd love a more technical explanation... When you hear an output section distort it is actually more of the phase inverter breaking down and how it "dies" or distorts than the output tubes in many cases. Different 12AX7s as an example each have their own breakdown characteristics. I have a more detailed post somewhere in here on phase inverters and how important they are in your amp.
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