Depends on the AC voltage and the filter type. Please have a look at the datasheet.
Best regards!
Best regards!
Usually you'd use balancing resistors in series with each diode to help with sharing the current.
You will be living on the edge of a cliff. One EZ81 can take 150mA ( depending on voltage and filter)
Why don't you use 1n4007 instead ?
I already studied the data sheet but it gives me no clue about using a pair in parallel.
Cheers
Ian
They did that in the Philips BX732A with EZ80s. These rectifiers are high impedance. They will equalize their current load even when they age to some extent. But why not use a single GZ34 if you insist on using vacuum tech?
GZ34 will only do 250mA and I need at least 300mA. I would like 500mA so a pair of GZ35 seems like a viable option. So do I just common the cathodes and feed the plates via individual resistors? Can I double the value of the reservoir capacitor?
Cheers
Ian
Just exploring options at the moment. Could use 1N4007 (but I don't like what it does to the transformer core) , or suitable tubes, or an SMPSU.
Cheers
Ian
6CG3 and its aliases will do 350 MA. but you'd need two for full wave.
https://frank.pocnet.net/sheets/123/6/6CG3.pdf
https://frank.pocnet.net/sheets/123/6/6CG3.pdf
You can rectify with silicon and then before getting to the first capacitor you use a (TV) damper diode. Only one is required and it creates a slow startup plus it gets rid of the cr@p introduced by silicon diodes. Use a small capacitor, then a choke and after that a capacitor as big as you like, in my case it is two 64u in series (giving 34u), a 5H choke, then 150u and then a resistor followed by 150u. You can even go further and use two resistors followed by a capacitor each to go to each channel.
Due to a purchased PCB I am using the damper diode in line with the transformer c.t. connection (with a fuse) rather than cutting tracks on the PCB.
Due to a purchased PCB I am using the damper diode in line with the transformer c.t. connection (with a fuse) rather than cutting tracks on the PCB.
Or 2 x EY500 ? They have Magnoval bases and can take 440 mA per tube. If = 2.1 A per tube.
If 300 mA in total at Vo = 500 V is enough, than 2 x EY84 is an option. If = 1 A per tube.
If 300 mA in total at Vo = 500 V is enough, than 2 x EY84 is an option. If = 1 A per tube.
THanks for those suggestions Walter. Is there a table anywhere listing rectifier valves?
Edit: And they are not too expensive either. Thanks again Walter. What do you think of the Sovtek version?
Cheers
Ian
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Why the 0.3 A requirement? Continuous? If it is peak a GZ34 will work just fine. EY500/PY500 is a booster diode for color TV, massive overkill IMHO.
It is continuous. The application is a professional audio mixer. It contains approximately 20 modules, each using 3 valves and consuming about 15mA, all class A.
Cheers
Ian