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Are Ruby tubes 5AR4 decent? I seem to have one and have o idea how I acquired it. And, what is the consensus on the best new production 5AR4? This will go in a phono preamp.
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Most likely Chinese.
Good luck with the new manu! Last (2) Russian ones I ordered didn't last 30 seconds! Nothing wrong with circuit either.
If you've got a good piece of gear, buy a good recto. Yes, good ones are expensive these days.
Sylvania and GE USA manu are good. Pretty much any Japanese recto is going to be good and of course a real Mullard(f32) will always be a good choice.
"This will go in a phono preamp."
Just curious, is that a Chinese design?
As far as I know, Ruby is a relabeler.The 'Ruby' label may cover Russian or Chinese tubes (or anything, for that matter).
Correct, Ruby is a re-seller, and not a manufacturer.
they buy tubes on the wholesale market, test, re-brand and sell.
5AR4s are straight forward tubes, and though some will disagree, they should not affect the sound...
Happy Listening
5U4 (not 5AR4) rectifiers do affect the sound, at least, in a Cary SL-80 amplifier.
Does the voltage change?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
I did not check it with a multimeter - I was judging by ear.
.
Have Fun and Enjoy the Music
"Still Working the Problem"
IMO - the same reason as with other tubes.
When alternating current is being used {and I look at music as AC}, the ratio I/V is not necessarily constant. Voltage and current can peak at different times if the circuit contains components like coils or capacitors {also effecting frequency}
These elements also are used by tubes and the ancillary components necessary to operate them. Tough question to answer coherently because THEN one must add how each of us hear differently.
The Mind has No Firewall~ U.S. Army War College.
.
Have Fun and Enjoy the Music
"Still Working the Problem"
"5AR4s are straight forward tubes, and though some will disagree, they should not affect the sound"
Agreed. I don't think i've ever heard a difference in sound between rectifiers ( in amps ) except for maybe the Mazda 5Y3GT in my SE84C. i have a tube phono pre-amp, that only takes 12AX7's. so YMMV
A high current tube rectifier 5AR4 in a phono preamp is more about nostalgia than sonics.
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