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Post by 1juicy1 on Feb 8, 2012 8:43:42 GMT -7
Maybe this has been covered before but... can one put a solid state rectifier such as the Weber Copper Cap in the Maz Jr. safely? I've read threads about the Maz 38 owners using them and liking the results. Buddy Whittington supposedly uses one also. I was just messing around trying to get a less compressed/saggy, tighter Marshall tone out of the Maz. Thanks for any info!
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Post by Scott on Feb 8, 2012 9:00:55 GMT -7
Word on the street is solid state rectifiers are OK for amps with 4 power tubes total, but not 2 power tubes like the Jr. I have not seen the Doc post this info, but currently believe it to be true.
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Post by benttop (Steve) on Feb 8, 2012 11:16:00 GMT -7
Word on the street is solid state rectifiers are OK for amps with 4 power tubes total, but not 2 power tubes like the Jr. I have not seen the Doc post this info, but currently believe it to be true. Actually the Doc is the source of that info. He posted it here quite a while back - maybe a few years.
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Post by randalp3000 on Feb 8, 2012 12:25:10 GMT -7
Copper Caps are simulated tube rectifiers and shouldn't be confused with other ss rectos that have only diodes in them like the ones from Groove Tubes that come with the KT-45. The Maz 18 uses a 5ar4 which has a voltage drop of 17 volts and the Weber WZ34 also has a drop of 17 volts and should work with the Maz. Not sure if you would notice much difference in sag, the 5ar4 doesn't sag much in my opinion. I would not recommend the Weber WS1 which does not have any voltage drop. more info for those who wish to further their knowledge about the Copper Caps www.webervst.com/ccap.htmlI have and use a couple but I am not affiliated with Weber in any way best wishes rp
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Post by BritInvasion on Feb 8, 2012 13:16:11 GMT -7
^ That's good to know Randy , might toss one in the gig bag for emergency use.
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Post by telejas on Feb 8, 2012 17:15:48 GMT -7
^ That's good to know Randy , might toss one in the gig bag for emergency use. I've got one in my gig box just for that reason.
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Post by Scott on Feb 9, 2012 2:25:48 GMT -7
If anybody actually tries one in a Jr, please post up your official results.
Thanks!
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Post by John on Feb 9, 2012 5:44:45 GMT -7
The Doc said it will burn up your power tubes quickly on his 2 x el84 amps.
He also said 4 x el84 amps are ok...but not the 2.
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Post by benttop (Steve) on Feb 9, 2012 8:12:17 GMT -7
The Doc said it will burn up your power tubes quickly on his 2 x el84 amps. He also said 4 x el84 amps are ok...but not the 2. I tried a search yesterday to see if I could find that thread, but I was not successful.
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Post by telebender on Feb 9, 2012 10:12:55 GMT -7
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Post by benttop (Steve) on Feb 9, 2012 10:36:55 GMT -7
AH! Thanks for that! Note the Doc says not to use the Copper Cap in the Jr. I believe he knows what he's recommending, which is why I've never done that. Had one in my Stingray though, and it worked great there.
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Post by John on Feb 9, 2012 16:08:19 GMT -7
I may get one for my Z-28. I'm using that amp for my country band gigs ..so the snappy tone change might be welcome.
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Post by Scott on Feb 9, 2012 16:11:05 GMT -7
Thanks for the links boys... Updated! Can I use a Solid State Rectifier in my Maz 18 Jr?
DRZ wrote: I don't like to see SS rectifiers of any type used on my 2 EL-84 amps, very little sag and higher plate voltages. Used on a 4 EL-84 amp of mine there's no problem, many players have used them in MAZ 38's for years.Ed M. wrote: Doc,
I was wondering if you could elaborate/clarify the above statements. The weber copper cap rectifiers are SS but emulate a tube rectifier and the voltage should be the same as a tube rectifier so I assume they are OK. I'm curious though as to why a SS rectifier and higher voltage are fine in the 4-el84 amps. Don't all the tubes see the full B+? I"m confused DRZ wrote: No matter what Ted tells you the Copper Top is not a direct replacement for a 5AR4 in every spec.
Without getting into his design, a lower currant amp like my 2 EL-84's will drop much less voltage across the CT's resistive load that tries to simulate a tube rectifiers SAG. The higher currant draw of a 4 EL-84 amp will cause the CT's internal resister to drop more voltage ( ohms law my friends ), and be closer to a true 5AR4's sag and voltage drop.
Let me add this. I don't enjoy undressing a friends clever solution to an engineering problem, but realize all engineering is a trade off to some degree.
ZRead more: ztalk.proboards.com/index.cgi?action=display&board=maz18&thread=30034&page=1#ixzz1lvfU9rbl
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Post by benttop (Steve) on Feb 9, 2012 16:21:25 GMT -7
Good job capturing that Scott. Now we know where to find it.
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Post by Scott on Feb 9, 2012 16:23:22 GMT -7
No problem. Recording Jr. info is what I do best...
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Post by BritInvasion on Feb 9, 2012 19:00:00 GMT -7
Thanks for digging that up Scott. Just scratched the copper top off the list for my Maz Jr.
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Post by 1juicy1 on Feb 9, 2012 19:57:58 GMT -7
Thanks guys! My Maz is too precious to end up frying!
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Post by Scott on Feb 9, 2012 21:15:20 GMT -7
+1
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