Russian rectifiers and diodes?

[Vbenonisen]

Has anybody seen a list of russian rectifier tubes and/or diodes, or have any experiences of use, quality etc.?

 

[JonSnell Electronic]

I use 5C3S Svetlana 5U4G better equivalent.
1700volts at 750mA cathode current. A beast of a valve. Beats GZ34 many times and it is a bright emitter so heat up time is extremely fast.

 

[jeff5may]

Think JJ, sovtek, and electro harmonix. All Russian made tubes. These two manufacturers are reproducing a gaggle of current production replacements for old brands.

As for solid state stuff, go fish. If I totally missed your call, it was because of the question.

 

[Vbenonisen]

"Think JJ, sovtek, and electro harmonix. All Russian made tubes. These two manufacturers are reproducing a gaggle of current production replacements for old brands."


Yes you're right of course, forgot about those. But I was thinking more about some unusual stuff (no US copies).

 

[VladimirK]

I use 5C3S Svetlana 5U4G better equivalent.
1700volts at 750mA cathode current. A beast of a valve. Beats GZ34 many times and it is a bright emitter so heat up time is extremely fast.

Vintage Vacuum Rectifier VO-188 is considered to be better soundwise than 5C3S. It is from the same period as legendary YO-186 triode.

 

[euro21]

There are some datasheet, but only in russian.

Next-Tube. Vacuum tubes and cores datasheets

This is the list of equivalence:
https://next-tube.com/Data/USA-RUS.pdf

This is also the same list as above... but in german.

 

[Vbenonisen]

Thank you euro21. I will look into it.

 

[thermo]

By the way Jeff, JJs are made in Slovakia (Czech). Good tubes except the 5AR4 which tends to arc.

 

[Francois G]

I use 5C3S Svetlana 5U4G better equivalent.
1700volts at 750mA cathode current. A beast of a valve. Beats GZ34 many times and it is a bright emitter so heat up time is extremely fast.

@JonSnell,

The 5C3S datasheet I checked shows indeed an “Anode Current Peak =750 ma, but it appears that the ”Rectified Current” = 250 ma max. Is this per anode? Am I reading this wrong? How does it “beat the GZ34 many times”?

 

[zdenoeddie]

JJ is not russian.

I used before 6c10p, very good rectifiers...

 

[6A3sUMMER]

Many/Most 5AR4 rectifiers tend to arc when . . .

The maximum input capacitance is exceeded
And/Or . . .
The minimum series resistance in the circuit is not met, versus the voltage to the plates.

Example:
Take a power transformer, primary 120VAC DCR = 30 Ohms, secondary 360-0-360VAC, DCR of 1/2 secondary = 50 Ohms.
Then, 30 Ohms stepped up by the primary to secondary ratio of 3; 3 x 30 = 90 Ohms
50 Ohms of 1/2 secondary
90 + 50 = 140 Ohms.
Check that total DCR and what input capacitance uF you use, versus a very well detailed 5AR4 data sheet.

JJ manufactures a GZ34s.
I do not know if that is exactly the same as a 5AR4.
Check the JJ GZ34s graph for 60uF max, and the required minimum series resistance, versus the maximum plate voltage for that series resistance.
If you are exceeding those ratings, do not complain.

Your Mileage May Vary
Good luck!

 

[Kay Pirinha]

Here's a German site on Russian tubes, containing equivalents tables etc. in English. It also mentions some rectifier tubes.

Btw, Svetlana has ceased manufacturing glass tubes many years ago. Of course you might find NOS ones anyway.

Best regards!