Showing posts with label power supply. Show all posts
Showing posts with label power supply. Show all posts

Monday, August 26, 2019

Monolithic Tube Power Supply Success!

Chris and I have been working on this power supply off and on for a year and a half. There is alot under the hood on this one. The previous power transformer failed but we had this beautiful Kenyon transfomer available. This power supply is stable and runs cool at 940v and 280ma.
 Of course the mercury vapors are 866A but the not so common tubes are the 6D22S which has a 30 second warm up.
 The blue glow is captivating and the westing house meters are stunning.

 I filmed our first startup here.

Now to build the other three chassis for this amplifier 8-)

Sunday, August 11, 2019

Monolithic Power Supply - Where There Is Smoke There Is Smoke

Chris and I have beeen working on this power supply off and on for a while. We are almost there and today we let her rip two 6D22S and two 866A tubes. It weighs almost 90lbs. Sadly the vintage ginormous power transformer started smoking and even stranger the 866A insulators were lightning up. If the video plays Look close for smoke and sparks. Fortunately we have a few transformers we can swap. We we were hitting 1kv and around  300ma+. Very fun we definatly went out for beers to celebrate!

Saturday, May 7, 2016

Boat Anchor or High Voltage Power Supply SCORE!

I had been lamenting the lack of any interesting scores locally and then a lot of vintage electronics showed up on craigslist. I was about 13 days late so I missed some tubes and another power supply. This isn't too bad for left overs.
 
I'm sure my friend Chris will say it is missing some meters and he would be right. 
This unit is very heavy. It has a huge power transformers and two really nice Kenyon chokes. The capacitors are a good size as well. I thought the tubes were 866 but they are in fact 836 which should be swap-able. 



Monday, January 19, 2015

How to Build A Universal Audio Amplifier And Power Supply - Radio News 1930

Another great Radio News article this one on building a universal power supply.