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Old 10th October 2004, 05:44 PM   #1
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Default Question about a hybrid PSU design

Hello,

Just found this schematic:

http://www.diyparadiso.com/othello1.htm

Does anybody know what are the benefits of using an EZ80 tube rectifier just after the silicone bridge?
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Old 10th October 2004, 07:43 PM   #2
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Default Re: Question about a hybrid PSU design

Quote:
Originally posted by reaction
Hello,

Just found this schematic:

http://www.diyparadiso.com/othello1.htm

Does anybody know what are the benefits of using an EZ80 tube rectifier just after the silicone bridge?

Reaction,
The IDH rectifier as is EZ 80/81 will provide slow start for the B+ which could not be provided with SS diodes.In other words, without that rctf. the signal tubes will suffer from cathode stripping,because B+ will be applied before they get warmed!

Regards,
Yugovitz
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Old 10th October 2004, 11:45 PM   #3
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Of course, cathode stripping is that fairy tale they tell tube-geek kids at night to scare them...

Tube or SS. Make up your mind. Use a timer relay if you have to (e.g. transmitter tubes specified for a heatup period).

Also no need for *******' 1mF on a preamp

Tim
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