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03/10/25 at 04:01:25

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Viable rectifiers for UFO2 (Read 155 times)

whynotnothing

Verified Member

Posts: 11

Viable rectifiers for UFO2
02/09/25 at 22:16:57

I was wondering if something exotic like Valvo G4004, Telefunken RGN4004 or Telefunken RGN 2504 are viable rectifiers for the Zen?

RGN 4004 heaters require 4 amps at 4V, so it does stress the ps more than 5U4G

There are also more options to be considered - for example the RGN2004 - which is double the heater current and dc output of rng1064 - which I know is viable and has been used already in ufo

Anyways thought I'd bring these rectifiers up - might be interesting to hear what others think - perhaps it ends up similar to the thread of 80 rectifier types

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CAJames

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red light on memory
lane."

Posts: 2340

Re: Viable rectifiers for UFO2
Reply #1 - 02/10/25 at 19:30:05

Quote:

Posted by: whynotnothing Posted on: Yesterday at 14:16:57
I was wondering if something exotic like Valvo G4004, Telefunken RGN4004 or Telefunken RGN 2504 are viable rectifiers for the Zen?

RGN 4004 heaters require 4 amps at 4V, so it does stress the ps more than 5U4G...

For me, I wouldn't risk it but I guess the question is how bad do you want to try them? I'm pretty sure using the adapter is going to draw more than 4 amps from the power transformer and that isn't anything I'd want to do. But, I've seen adapters made with a connection for an external power supply which might be something to investigate if you really really want to run these rectifiers in the UFO2.

I've tried AZ[1|11|12] rectifiers in my UFOs, but they all use less power than a 5U4. FWIW they all sounded good, but not good enough to displace my favorite 5V rectifiers. There are so many 5V rectifiers out there I'm content sticking with them.

[FOOBAR2000 | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC

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whynotnothing

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Posts: 11

Re: Viable rectifiers for UFO2
Reply #2 - 02/11/25 at 09:47:44

Thanks.

Well, makes sense, I guess I won't risk it with an 4004, that'd be pushing it too far.

OTOH, since you've used AZ12 which should be an electrical equivalent to RGN2504 - I guess that one should be safe.

Reason I'm asking is I got the TFK RGN2504 globe with solid plates,
and another one I found for pocket change is Tungsram PV4200, which is an equivalent to RGN2004. Both look beautiful and would be a shame not to give them some run time

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