May 23rd, 2012, 07:06 AM
I just purchased a pile of electronic gear. One of the items was the thing shown below. I believe the seller said it was a 350v power supply he built. What is it, how does it work, does it have value, could I use the parts to build an amp? The tube in it is a 5u4GB. The large capacitors are spragues. The transformer is a Standard Transformer PC8409. It does not seem to have any connections to hook anything to it. I have lots of tubes.
May 23rd, 2012, 07:45 AM
Umm.., 1 x PT, 1 x rectifier (tube), 2 x filter caps, 1 x HT choke, and a mains chord, switch, and pilot lamp - looks like a power supply. It should have a mains fuse (on the primary side of the PT) though, just to protect the thing from catching fire.
May 23rd, 2012, 08:43 AM
The guy that had all this equipment worked on shortwave radio equipment and I know he used this in doing that.
I also purchased a nice Hickok 533a tube tester which is what I was after along with a pile of tubes.
May 23rd, 2012, 08:45 AM
Yeah, power supply.
The big caps are junk by now. Nice Amphenol octal socket just like Fender used in '50s tweeds.
It's an amplifier with the amplifier left out. :lol:
350v-0-350v @ 80 ma.
5v / @ 2a so that 5U4G doesn't belong in there.
6.3v CT @ 3a.
May 23rd, 2012, 08:48 AM
Looks like I could use the parts in an amp build.
May 23rd, 2012, 08:58 AM
Yup. Two more tubes and you got an amp. Plenty of room in / on that chassis.
Lose the 5U4G, use a 2 amp rectifier like 5Y3, 5V4 or 5AR4.
Use a 6L6 because the supply voltage will be on the high side for a 6V6.
12AX7 for the preamp.
Did you get the dude's Greenlee punches?
May 23rd, 2012, 12:17 PM
No. Did not know anything about them.
May 23rd, 2012, 03:40 PM
What is a simple amp design that this transformer would go with?
May 23rd, 2012, 03:59 PM