FDP Forum / Recomendation for current production GZ34 rectiier tube ?/ 8 messages in thread.

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Stratmanx

Contributing Member
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Memphis, TN

Oct 9th, 2017 10:13 AM        

more than likely going to replace the Sovtek GZ 34 I've got on hand and wanted to know what you guys are using for current production GZ34 rectifiers ?<br /> <br /> I love the NOS stuff, but prices on these are pretty high.<br /> <br /> Thoughts ?<br />



willie

Contributing Member
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Too Near Atlanta GA

Amp Tech Emeritus
Oct 9th, 2017 11:08 AM        

I've long used JJ 5AR4/GZ34 with good results. <br /> <br /> w



Stratmanx

Contributing Member
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Memphis, TN

Oct 9th, 2017 12:11 PM        

Thanks Willie, I'll give it a shot.<br />



Hammond101

Contributing Member
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So. Cal. USA

Oct 9th, 2017 12:16 PM        

I also prefer the JJ over the Russian or Chinese rectifier tubes.



MLC



It's not just good..

...it's good enough.
Oct 10th, 2017 06:39 AM        

I put the equivalent Weber Coppper Cap rectifier in my Deluxe Reverb several years ago.<br /> <br /> It's a solid state device, but they were designed to mimic a tube rectifier. It's NOT a straight-up SS rectifier plugin. <br /> Basically, a "tube" rectifier that won't wear out.<br /> <br /> I've been very happy with mine.<br />



Steve Dallman



Merrill, Wisconsin

Age is just a number...mine is big
Nov 3rd, 2017 01:30 PM        

I too like the copper caps. They use a SS rectifier and voltage dropping power resistors, in series with a heat sensitive thermistor. <br /> <br /> When you power up the amp, the thermistor is at a high resistance. As the resistors heat up, the resistance of the thermistor drops, until full voltage is reached. <br /> <br /> The resistors chosen drop the voltage to match their tube counterparts. <br /> <br /> My ONLY complaint is that the CC is rather heavy and falls out often in transport. I have added tube holders to the rectifier socket to prevent this.



pdf64



UK

Nov 4th, 2017 05:02 AM        

Ruby tubes have a good warranty and are stringently screened.<br /> A well respected real engineer has worked to get their GZ34 as close as possible to the Mullard characteristics, see link.<br /> <br /> The Weber WZ34, with its 78 ohm series resistance, is far saggier than any real GZ34, and so hamstrings an amps power output (which may be a good thing if that's what you're after).



willie

Contributing Member
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Too Near Atlanta GA

Amp Tech Emeritus
Nov 4th, 2017 06:15 AM        

I like the concept of the copper cap but not the practicality of it for the same down side that Steve mentioned (too heavy). I used to build my own version of the copper cap years ago...they have their applications but I still prefer a well designed and appropriately applied vacuum tube rectifier in most cases. <br /> <br /> w



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