Actually, looking at the 4 vacuum tubes I need to stock for spares, they are: 6C20, 6N0120, 6NC10,
and 115V010. All the ones I have are Amperite.

Looking to buy Amperite 6NC10 vacuum tubes (or equivalent), by the way.

What is the best place to buy vacuum tubes? Anyone have a slam dunk tube supplier in the USA? I still have a number of machines that still have vacuum tube circuitry. I have kept a couple in stock for years and now I'm at a point of control upgrade or just find some more spares.



Is there a best place to buy vacuum tubes? Or just check on Ebay....

Here's a vintage Cycles per Second Meter



It is made in the USA by Westinghouse. Not sure of the year of manufacture but it is style number: 409C565A53. It says use with external transducer ser. shown on base

OK, all the measurements look OK, 120VAC In 24.8VDC out. Currents are well within spec only around 2.5 amps DC on the out put side with the machine running.

I stumbled on something else though, the temperature of the cabinet. i noticed that it has been hot in there recently but think think much of it. There are two cooling fans to circulate air in the cabinet, both are not working. Turned out one fan had seized and tripped a breaker. I disconnected the bad fan reset the breaker and now at least one fan is working while I order another one. Now I'm thinking that the cabinet temperature has something to do with component failure. I'll know more this week after the machine has been running for a while.

What kind of fuse should I use in a DC power supply? When you buy these new, are you suppose to fuse them yourself based on load?

I am going to replace it again and check both incoming an outgoing voltages, infeed current and outfeed current so I have all the bases covered.

The fuse was original as far as I know. The new power supplies both came with 4 amp mdl glass fuses so I am assuming that is the proper sizing. As for amps, i didn't bother checking because the fuses didn't blow.

Quote from: 3rdshiftguy on February 28, 2017, 04:32:AM
I concur.... (haha) If you're looking for cheap mechanics tools, buy name brand tools used on eBay for cheap, avoid tool brands you never heard of.

I have bought used tools on Ebay too. This is a great way to build your tool box without killing your wallet in the process.

Hello Roundtable,
Guys I have a newer pacific hydraulic press with NC style controls. I have a recurring power supply failure and i'm looking for some advice.

It is a 3.5 amp 24VDC power supply. Fuse didn't blow the on the original supply. So I assumed it gave up and ordered another one. Turns out about two weeks later same problem came back, no 24V again.

I checked the power supply and found a good fuse but no output again. I thought they maybe sent me a bad one and I made the mistake of ordering another one and same thing happened. 3rd one has failed and i don't understand if it's not being overloaded what could be going on...

Any thoughts on my recurring power supply failure?

Triley