FDP Forum / Recomendation for current production GZ34 rectiier tube ?/ 11 messages in thread.

1 to 11 of 11 shown.


Stratmanx

Contributing Member
**********
*******

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
********

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
**********
*******

Memphis, TN

Oct 9th, 2017 12:11 PM        

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



Hammond101

Contributing Member
**********
*

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
********

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



avspecialist



USA/Connecticut

Bobby Roadrunner
Jan 2nd, 2018 06:01 AM        

I did a quick experiment using my 1967 Super Reverb. I compared my noâs Millard, the JJ, the TAD and a preferred series GZ34/5AR4 and there was virtually no difference. I presently left the TAD in there since the 6L6GC were TAD also just to have matching tubes showing.



Mars Hall



USA NW Indiana

Telefunkin'
Jan 3rd, 2018 12:36 PM        

pdf64, the only Ruby rectifiers I see are labeled 5AR4 from the Magic Parts site and others. The guy in your reference article claims the 5AR4's have more voltage drop than a GZ34. The posts are from 2011. Perhaps Ruby doesn't produce the GZ34 any more?



pdf64



UK

Jan 4th, 2018 11:39 AM        

Thanks for pointing that out.<br /> I suspect (from the blurb and the 'C' designation) that they may be selling it now as the 5AR4C/GZ34 see link.<br /> <br /> I guess they might have labelled it like that to avoid confusion, as the two tube types are compatible / equivalent.<br /> <br /> It definitely isn't their 5AR4CZ which is branded JJ.



Copyright 1999-2003 Fender Discussion Page, LLC. Visit the web site at http://www.fenderforum.com