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Does anyone know the voltage drop of the 596 (rectifier)? I've searched -- here and everywhere else I can think of -- but no luck.
I have one on order to try in place of a 5U4G -- mostly just to see what the hype is about. At 5V/3A, it will "work"; but will it WORK?
Thanks!
Follow Ups:
Which has a 4uF first cap limit. If you have a big cap as your first cap it will arc.
A 5R4 will drop more voltage, probably 15 to 20 volts versus a 5U4
Tube Type DC mA PIV FIL AMPS Max ACV DCV DCV DROP
Diode Rectifier 425
5AR4 / GZ-34 250 1500 1.9 450 415 10
5V4-GA 175 1400 2 375 400 25
GZ37 350 1000 2.8 450 388 37
5U4-GA 250 1550 3 450 381 44
5U4-G 225 1550 3 450 381 44
5U4-GB 275 1550 3 450 375 50
5Y3-G/GA 125 1400 2 350 365 60
5R4GYB 250 3100 2 900 362 63
5R4G/GY/GYA 250 3100 2 750 358 67
What qualifies the 5R4 as the "electrical equivalent" to the 596? Would you mind linking me to a source? I ask because they obviously have different filament current draws. I guess "electrical equivalent" does not mean "suitable replacement" in practice? Thanks!
High-rel, high altitude (60000ft) version of 1641, full wave rectifier. 2.3KV PIV, 275mA average current. Designed and manufactured by United Electronics.
Look Up 1641
http://tdsl.duncanamps.com/pdf/vm408.pdf
It has a 3 amp indirect heater versus a 2 amp filament in the 5R4
"Which has a 4uF first cap limit"No it doesn't.
It has a max peak repetitive current rating (like all rectifier tubes) that can not be exceeded.
4uf, depending on the voltage, current and resistances involved, can cause the max peak repetitive current rating to be exceeded while in a different situation with different voltage, current and resistances a 50uf cap would be fine.
I have stated this truth about rectifier tubes and tried to explain about the input cap value given on the data sheets and what it means many times but no one seems to listen.
The data sheet linked below shows a input cap value of 20uf. The data sheet also shows the operating conditions that allows that value.
If you have different operating conditions then the max input cap value will be different.
Again, it's the max peak repetitive current rating that can not be exceeded.
If the voltage is less and/or the current is less and/or the series resistance is more then the uf value of the input cap can be higher without exceeding the max peak repetitive current rating of the tube.
There is no magic "max input cap value" associated with rectifier tubes.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 04/25/17 04/25/17
So, is there a formula or better yet, an online calculator for determining the max peak repetitive current rating in a given circuit?
Thanks in advance
Yes, PSUD2 will show the peak repetitive current in the rectifier tube of a power supply design.
Or you can get a more accurate idea of the currents by using spice.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
This issue came up again in another thread about the 6X4. Seems to be a common misconception that there's a fixed value of safe maximum capacitance for every rectifier type. Oh well, keep up the good work! :)
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