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Say hello to my little (HV) friends

Posted: Wed Oct 25, 2017 11:17 pm
by John Myers
I bought some high voltage equipment from an auction.
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150KV DC caps
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130KV 5.5ma DC supply
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130KV 5.5ma DC supply
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130KV 5.5ma DC supply
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Spark gap firing transformer
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Spark gap firing transformer
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HV Trigger Amp
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HV Trigger Amp

Re: Say hello to my little (HV) friends

Posted: Thu Oct 26, 2017 11:43 am
by Dennis P Brown
Wow, that is a lot of heavy metal! Well, looks like you have both a complex but extremely interesting project getting that stuff working!

I'd really like to hear, as you progress, what you are doing to get the various components working; or if you will side step some of that and create a new pulse system for the x-former (maybe, if you know, some details on how that x-former works.)

That 130 kV x-former really looks like it can deliver the current along with those volts - that is one big monster.

So, do keep us posted on your work once things start to progress - that project really looks exciting and fascinating!

Also, thanks for posting the images.

Re: Say hello to my little (HV) friends

Posted: Thu Oct 26, 2017 7:07 pm
by Rich Feldman
Ooh! Ahh!

Re: Say hello to my little (HV) friends

Posted: Thu Oct 26, 2017 8:43 pm
by Rex Allers
Those big caps are labeled 500 uufd. I think most manufacturers had switched from uufd to pf by some time in the 60's, so that's some pretty vintage stuff. Hope the internal magic hasn't evaporated.

Re: Say hello to my little (HV) friends

Posted: Thu Oct 26, 2017 11:21 pm
by John Myers
I don't have any concrete plans for the spark gap xformer, I thought I might regret not getting it later and should rescue it from the metal scrapers who seem to be bidding on items like that. I haven't found any info on it yet, I'm not exactly sure how it works so I'll probable open it up and take a look.

It looks like it was a bunch of old equipment from the Los Alamos national lab. I also got 4 pwr supplies for Oscopes. Here's a youtube video of someone showing the insides.

I didn't even think about how old the caps were until few day's after I bid on them. I spent about $2 each so I think it's still worth the gamble.

I was told that the items in the pictures below were part of a nitrous system. So I got them too, just out of curiosity. One seems to be a pump or compressor and the other ended up having a large cap inside.

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Re: Say hello to my little (HV) friends

Posted: Fri Oct 27, 2017 12:01 pm
by Jerry Biehler
That's a hydrogen thyratron on the end of that one thing. Marked Res (reservoir) and HTR (Heater filament). Some sell for decent money on ebay.

Re: Say hello to my little (HV) friends

Posted: Fri Oct 27, 2017 5:57 pm
by John Myers
That's great!
I assumed that the tubes meant it was some sort of pump but it must be for cooling the thyratron.

Re: Say hello to my little (HV) friends

Posted: Fri Oct 27, 2017 7:00 pm
by Dennis P Brown
That 130 kV transformer looks fairly complete/turn key (except for the drum and oil.) I believe those horizontal stacks are the HV diodes. Does it indicate what voltage and frequency it needs in the primary in order for it to operate? Also, have you ohm tested the primary and secondaries to see if they are ok?

Re: Say hello to my little (HV) friends

Posted: Fri Oct 27, 2017 8:25 pm
by John Myers
I had to leave on a business trip right after I got them so I didn't have time to checkout/test anything. It will be another whole week before I get back :(

I got two of them but only one had a label, which is faded. I'll check again when I get back to see if there's any other labels somewhere with those specs.
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Re: Say hello to my little (HV) friends

Posted: Sat Oct 28, 2017 7:41 am
by Richard Hull
You might be interested to know that the original Farnsworth fusor team used a Universal Voltronics 150kv 50ma power supply in their work back in the 50's and 60's. According to Jean Meeks the supply was in a fiberglass drum larger than a 55 gal oil drum and with oil weighed in at over 1500lbs. Jean told me they had to move it twice and had to remove two doors to the lab to get a fork lift in the lab to move it each time.

Richard Hull