Del spends a crapload of money......on old test equipment
Here's a cap story you can appreciate. Years and years ago I made a deal on an ill Heathkit SB220 needed power supply work and caps, may have needed rectifiers I don't remember. Anyway one late-long-weekend-three-four-day-weekend, I just HAD to. Went down to the 'junkbox.' Came up with a pair of old military oil filled caps that would actually fit in the confines of the old filter bank enclosure. You have to have two matched caps because it's a voltage doubler. I KNEW they were low on value, but just "hoped." I don't remember anymore, they were either 8 mikes or 4 mikes apiece, so half that in series.
Anyway put them in it seemed to work fine and ran the amplifier that way for months. Then I got "a deal" someone wanted the thing worse'n I, and I agreed to install the proper caps. Bear in mind this ran some 3200 volts or so on the plates. (3-500Z's a pair). When I pulled those old military cans out, I discovered THEY WERE 600 VOLTS EACH. So 1200V working voltage operating on over 3KV!!!!!
The little box with the big red sign is where the diode rectifiers and caps go
Here's a cap story you can appreciate. Years and years ago I made a deal on an ill Heathkit SB220 needed power supply work and caps, may have needed rectifiers I don't remember. Anyway one late-long-weekend-three-four-day-weekend, I just HAD to. Went down to the 'junkbox.' Came up with a pair of old military oil filled caps that would actually fit in the confines of the old filter bank enclosure. You have to have two matched caps because it's a voltage doubler. I KNEW they were low on value, but just "hoped." I don't remember anymore, they were either 8 mikes or 4 mikes apiece, so half that in series.
Anyway put them in it seemed to work fine and ran the amplifier that way for months. Then I got "a deal" someone wanted the thing worse'n I, and I agreed to install the proper caps. Bear in mind this ran some 3200 volts or so on the plates. (3-500Z's a pair). When I pulled those old military cans out, I discovered THEY WERE 600 VOLTS EACH. So 1200V working voltage operating on over 3KV!!!!!
The little box with the big red sign is where the diode rectifiers and caps go
