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Post by midheightfive on Aug 4, 2018 12:55:52 GMT -7
Alright guys. I have been considering a Dr Z for a while and I finally pulled the trigger on an older (I think 2002) Route 66 recently after reading the reviews on the info page saying it cleaned up with the guitar volume knob without losing apparent volume. I have a cheap amp that does that trick, and I've been looking for a better amp that also does it too. When I got my Z it definitely lost volume while cleaning up. Is there anything you know of that will increase sag/compression in the amp to help me out? Different rectifier? Different brand of kt66 or ef86? (Currently NOS ef86, mullard reissue 12ax7, gold lion kt66, and EH 5U4
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Deleted
Deleted Member
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Post by Deleted on Aug 4, 2018 13:05:20 GMT -7
The amp will clean up without loosing volume If you have it turned up in the first place... as in If you had all the knobs (Volume, bass and treble at 3 o'clock or higher).
If it's not already on it's hind legs It won't act the same.
All the tubes you've got sound like good ones.
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Post by midheightfive on Aug 4, 2018 13:09:00 GMT -7
Even turning all controls up to 3 o'clock or higher hasn't produced the results I'm looking for.
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Post by Jaguarguy (Mike) on Aug 4, 2018 13:35:53 GMT -7
Just curious - did you put in the tubes or were they already in the amp when you got it?
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Post by midheightfive on Aug 4, 2018 13:59:16 GMT -7
The Ef86 was already installed. The kt66s fell out of their sockets while they were shipping it to me. They apparently knocked the tube retainer/protector off of the 12ax7 while they were rolling around in there and were wedged up against the rectifer tube when I unpacked it. There were glass chips inside of the kt66s so I had to replace those and I replaced the P.I. and rectifier out of caution. I was really hoping the ef86 wold still work and it did. So, all the tubes except the ef86 are pretty new.
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Post by j4gitr (John) on Aug 5, 2018 3:26:32 GMT -7
Did you re-bias the amp after installing the new tubes? If not, start there.
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Post by midheightfive on Aug 5, 2018 6:44:53 GMT -7
Isn’t the Route 66 cathode biased? I was unaware that it could, or would need to be biased.
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Post by midheightfive on Aug 5, 2018 15:53:36 GMT -7
Okay, I found a thread about bias ztalk.proboards.com/thread/2578/bias-route-66but it looks like that was with a 5ar4 rectifier. Would switching rectifiers to 5ar4 or a 5y3 have an impact on sag/compression? From what I’ve read about rectifiers it didn’t look like using a 5ar4 on an amp in this wattage range was even a good idea, but obviously that was misinformation.
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Post by Jaguarguy (Mike) on Aug 5, 2018 17:02:03 GMT -7
Here's Doc's AMA on rectifiers - it might help you answer your questions. The Route 66 does need to be biased.
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Post by Jaguarguy (Mike) on Aug 5, 2018 17:11:02 GMT -7
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