| Electronics > Projects, Designs, and Technical Stuff |
| Planning to build benchtop 500V tube PSU, help needed. |
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| TERRA Operative:
Quick bump to let you guys know this is still happening... :) Got pretty much all the parts needed (pending final tube choices) except the enclosure (which I'll choose once I know the size I need) and the power transformer and 12H inductor, which I can get from Digikey. Transformer - https://www.digikey.com/products/en?keywords=hm5128-nd Inductor - https://www.digikey.com/products/en?keywords=hm4779-nd Problem is that after the Christmas expenses (airfares and all), I just blew this months allowance on a Tek 577-177 curve tracer, so I'll have to wait a bit to save up my pennies for those last bits. Anyway, here's a pic of the stuff I have so far. :) |
| coppercone2:
How much cooler does the vacuum insulated part of the tube get when the tube is cooled from envelope reradiation? Is it possible to measure temperature of the structure with a built in rtd to regulate heater power rather then to cool the tube? |
| ArthurDent:
I’ve made some adjustable D.C. power supplies in the past using triodes as the pass element. On the larger supplies I used 6080WA or 6336 tubes. Here are some photos of a small 150-250VDC 100Ma supply I made ages ago that worked pretty well. What I’m using now is an electrophoresis power supply made by Bio-Rad that is somewhat similar to the one pictured below. These sell on eBay generally for less than $100. The one pictured has 2 voltage ranges of 250/500VDC and 2 current ranges of 50/500Ma. I needed one a little different so the one I bought has digital meters and goes up to 1Kv. |
| 001:
--- Quote from: ArthurDent on February 09, 2019, 03:32:53 am ---I’ve made some adjustable D.C. power supplies in the past using triodes as the pass element. On the larger supplies I used 6080WA or 6336 tubes. Here are some photos of a small 150-250VDC 100Ma supply I made ages ago that worked pretty well. What I’m using now is an electrophoresis power supply made by Bio-Rad that is somewhat similar to the one pictured below. These sell on eBay generally for less than $100. The one pictured has 2 voltage ranges of 250/500VDC and 2 current ranges of 50/500Ma. I needed one a little different so the one I bought has digital meters and goes up to 1Kv. --- End quote --- Thanx for great info! Can You post schematics of this units or correct model numbers to google it? |
| TERRA Operative:
--- Quote from: ArthurDent on February 09, 2019, 03:32:53 am ---Here are some photos of a small 150-250VDC 100Ma supply I made ages ago that worked pretty well. --- End quote --- Looks cool! Don't tease us though! You got any schematics? :) |
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