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Old 10th December 2009, 06:45 AM   #1
diyAudio Member
Join Date: Nov 2009
Location: Vienna
Default Lab Power Supply

Hi All,

I would like to but a power supply for the HV to play around with various valves, including KT88 and 300B. I have been offered the following:

1) Max 350 V 0.250A drop type


2) Max 500 V 0.200A switching type

What would you pick ? the second one is also more expensive.

Do you think that 350 V is not enough?


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Old 11th December 2009, 07:54 AM   #2
m6tt is offline m6tt  United States
diyAudio Member
Join Date: Aug 2007
I think having 500v available would be helpful for power pentodes and beam tubes. Many multigrid power tubes like voltages between 350 and 500. It's probably better to have the voltage available than to need it and not have it, depending on the difference in price!

Last edited by m6tt; 11th December 2009 at 07:57 AM. Reason: improved
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Old 11th December 2009, 10:52 AM   #3
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Join Date: May 2003
Location: Palatiw, Pasig City
a variac is the way to go......
planet10 needs your help: Let's help Ruth and Dave...[B
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