Dubstep Girl's Massive 5AR4/5R4/5U4G Rectifier Review/Comparison! (Rectifer Tube Rolling thread)
Apr 4, 2021 at 4:13 PM Post #1,954 of 2,674
Sure is fun to roll rectifiers (have around 5 so far) and DHT’s in the Lampizator! I haven’t tried the KR 5u4g RK or some of the exotic 274’s many rave about which are priced up in the stratosphere. Wondering if I’d appreciate the differences?
 
Apr 9, 2021 at 10:17 AM Post #1,956 of 2,674
Any opinions on the Brimar GZ32 being sold by Langrex on eBay? Thanks.
 
Apr 9, 2021 at 1:00 PM Post #1,958 of 2,674
Wow. Thanks for the heads up!
 
Apr 9, 2021 at 1:32 PM Post #1,959 of 2,674
Wow. Thanks for the heads up!

To begin, look for the Mullard label. If it carries the Mullard label, it's probably the real thing. And as you get more experience, you will learn to be able to differentiate a Mullard GZ32 from the others by internal construction. In addition to the Russian 5C4S, there is also a version manufactured by La Ratiotechnique in France.
 
Apr 9, 2021 at 1:44 PM Post #1,960 of 2,674
I actually already own a British Mullard GZ32. I was just looking at some alternatives. In my Woo Audio WA-6, I prefer this tube over others I have tried: Ken Rad 5V4G, RCA 5U4G, Mullard early black base smooth plate GZ34, and Raytheon RK60. Most of the other "better" rectifier's are too just expensive.
 
Apr 9, 2021 at 2:06 PM Post #1,961 of 2,674
I have more rectifiers than I need but these look good.

https://www.ebay.com/itm/VINTAGE-NO...-/324486653639?_trksid=p2349624.m46890.l49286

I actually own a mid 1950's version of this tube in "coke bottle" form. But these tubes are NIB & NOS. And the price is right $30.00. You can't even buy a newly manufactured tube for this price. And in my humble opinion, Canadian made tubes from the golden era of tube making are as good or better than USA made tubes.

These should be good in the Woo Audio WA6 or in any amp that uses a 5U4G.
 
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Apr 9, 2021 at 2:29 PM Post #1,962 of 2,674
I actually already own a British Mullard GZ32. I was just looking at some alternatives. In my Woo Audio WA-6, I prefer this tube over others I have tried: Ken Rad 5V4G, RCA 5U4G, Mullard early black base smooth plate GZ34, and Raytheon RK60. Most of the other "better" rectifier's are too just expensive.
Consider trying out a Brimar 5z4g, great tube that can still be had relatively cheap.
 
Apr 9, 2021 at 3:07 PM Post #1,963 of 2,674
The Brimar 5z4G looks interesting. Are there any sonic differences in the construction and year of manufacture? I see everything from 50's to 70's on eBay.
 
Apr 9, 2021 at 3:40 PM Post #1,964 of 2,674
The Brimar 5z4G looks interesting. Are there any sonic differences in the construction and year of manufacture? I see everything from 50's to 70's on
The Brimar 5z4G looks interesting. Are there any sonic differences in the construction and year of manufacture? I see everything from 50's to 70's on eBay.
I have a pair with the solid type getter probably late 50’s with STC labeling, and a newer square getter version , to me they sound very similar, the older perhaps has a more refined high end and physically feels heavier.
 

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