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200V Tube Amp Power Supply
200V Tube Amp Power Supply
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Old 31st October 2017, 06:04 AM   #61
LSOJ is offline LSOJ
diyAudio Member
Join Date: Oct 2017
200V Tube Amp Power Supply
Originally Posted by JeffYoung View Post
Edcor has a lot of transformers sized for tube gear:

EDCOR - XPWR Series Tube Power Transformers
I browsed, I'm interested in their 175-0-175 68mA transformer. It is perfect for small 200v applications. I was able to design a simple CRC power supply with a couple of 100uF caps and a 4k resistor.

Originally Posted by kodabmx View Post
Or save yourself a lot of time, money, and effort and just use one of these.

DC-DC 8-32V to 45-390V Step Up Power Supply Module High Voltage ZVS Boost Module | eBay

Power it with one of these.

AC100-240V To DC 12V/24V 2A -10A Power Supply Adapter Driver Switch For strip | eBay

You run the heaters from the 12V supply and the rest from the boost converter.

On the present board I'm working with, a dual 6922EH tube headphone amp, I'm using this device with a 24V 1A DC power supply in this device you recommended. It can't seem to keep the charge up.

It uses a 200k resistor to grounds in the form of a voltage divider for floating the filament voltage to +50

Here is also a picture of this setup, and the 1H inductor is not connected.
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