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Topic: Tubes for a twin reissue Sarno- Fox - or Tech |
Jim Whitaker
From:
Ohio, USA
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Posted 27 Dec 2008 9:53 am |
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This is my second thread on this subject.
2 questions please.
1. Can bad tubes cause your bass response to diminish?
2. What are the best reasonably priced tubes to purchase & should I change all tubes or just the 6L6's?
Thanks in advace |
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Ken Fox
From:
Nashville GA USA
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Posted 27 Dec 2008 11:19 am
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1. Can bad tubes cause your bass response to diminish?
Had it happen with cheap Chinese preamp tubes on a Peavey Triumph some years ago.
If you are losing bass on both channels then there may be an issue with tube #6 or other issues.
I do not guess on things like that, I bench test to check the amp.
2. What are the best reasonably priced tubes to purchase & should I change all tubes or just the 6L6's?
That's a matter of opinion, I would suppose. Change all the tubes? No idea if they are bad or not. Could be a waste of good money!
JJ/Telsa is all I use in my shop. SED are fine tubes as well. |
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Jim Whitaker
From:
Ohio, USA
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Posted 27 Dec 2008 12:16 pm
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Thanks Ken I really appreciate it. As I understand it you don't work on reissues. Is that right?
Jim |
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Ken Fox
From:
Nashville GA USA
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Posted 27 Dec 2008 3:22 pm
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| I avoid them at all cost |
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Jim Whitaker
From:
Ohio, USA
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Posted 28 Dec 2008 12:42 pm
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Ken, one more question. Just on a whim which tube is the 6th tube so maybe I'll change it out just to see.
Jim |
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Ken Fox
From:
Nashville GA USA
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Posted 28 Dec 2008 12:55 pm
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| From right to left facing the rear, #6 is a 12AT7 next tot eh power tubes |
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David L. Donald
From:
Koh Samui Island, Thailand
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Posted 28 Dec 2008 8:14 pm
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I agree avoid the SED's I am advising a Hong Kong metal / hard rock guitarist
with some classic Marshals and a few classic Fenders,
on some rebuilds and mods, he has mostly SEDs,
and MOST ALL are going bad, he is apoplectic about it too.
I have Tungsols in a few amps and like them for power tubes.
I have Electro Harmonix 6L6 in the Dumble clone power tubes
and they are stable, but I don't push it hard so far.
On the front end small 12a±7 class I love Mullards,
especially for those 1st or overdriven tubes.
But also NOS Philips, RCA, National and Sylvania.
Typically JAN Joint Army Navy old stock.
A bit less picky about Phase inverter tubes
or Tune stack drivers or reverb drivers.
Tesla had a bad batch of GZ34 recto tubes recently,
but their other tubes seem to be fine.
Generally a good marque.
Tubes last a good long while, don't go cheap,
just put in good ones gradually.
_________________
DLD, Chili farmer. Plus bananas and papaya too.
Real happiness has no strings attached.
But pedal steels have many!
Last edited by David L. Donald on 29 Dec 2008 11:16 am; edited 1 time in total |
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Steve Feldman
From:
Central MA USA
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Posted 29 Dec 2008 7:38 am
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David - Just FWIW, I've had really good success with SED Winged C's in a couple of amps here (tone, stability, etc). On balance, they also have very good 'press' among alot of the chatter on other guitar forums. Just my experience....
_________________
"...An admission of interest in protracted commentary is certainly no reason to capitalize on surmised aberations that do not exist." - BH |
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Michael Brebes
From:
Northridge CA
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Posted 29 Dec 2008 8:17 am
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I have also had very good experience with the SED Winged C tubes. Good life and tone out of the 6L6's and EL34's.
_________________
Michael Brebes
Instrument/amp/ pickup repair
MSA D10 Classic/Rickenbacher B6/
Dickerson MOTS/Dobro D32 Hawaiian/
Goldtone Paul Beard Reso
Mesa Boogie Studio Pre/Hafler 3000
RP1/MPX100 |
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David L. Donald
From:
Koh Samui Island, Thailand
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Posted 29 Dec 2008 11:15 am
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I have also heard nice things about the tone
and stability
of some generation of Winged C.
But my more or less student amp mod'er is losing these tubes
at a maddening rate. Most cases prior to doing any work
on the amp.
He is 6 for 8 bad at this point. Prretty maddening.
This is part of 8 amps worth of advising I am doing with Wei right now. So I agreed with the warning,
based on actually dealing with a high percentage of
bad ones in present tense.
Bad batch of a normally good tube is my best guess.
_________________
DLD, Chili farmer. Plus bananas and papaya too.
Real happiness has no strings attached.
But pedal steels have many! |
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