This is a 1960s external power supply that was very common. It supplied +830 Vdc, +300/+250 Vdc switchable, -130 Vdc bias, adjustable ~50 Vdc bias, +6 Vac filament, +12 Vac filament via a crazy 11-socket plug. It featured external on/off, a "circuit breaker", and could optionally fit inside the company's speaker enclosure.
Older poaler bears (@Owlchemy) will recall fondly the Heathkit phenomenon, whereby inexpensive (relative to others on the market) kits were made for adults and older children to put together themselves! Think of it... soldering, deadly voltage... could never do it today.
As with any old electronics, as @sporkulon can attest to, capacitors will probably be bad, and given the price to replace, worth doing. In the case of this power supply, it was so common that a couple folks have made printed circuit board replacements for the direct point-soldering method of circuit construction, and everything fits in a smaller space (while still using the transformer, choke (inductor), switches, and mounting points.
- Comparison of my grandfather's work vs. mine (picinfinity.co) (he had lead solder probably!) soldered all diodes, resistors, capacitors to the PCB
- Old unit didn't have the cover that came with it; wasn't a big deal before but now there would be exposed 800 Vdc so good idea to get a cover off eBay (picinfinity.co) and spruce it up (picinfinity.co) with some matching paint.
- Hardest part was doing the point-soldering of old wires to the underside of the PCB; several needed extensions. OLD (picinfinity.co) NEW (picinfinity.co)
- Outside view, OLD (picinfinity.co) NEW (picinfinity.co)
- Finished, with cover (picinfinity.co)
I hereby declare this as the coolest thing any of us faggots did today
This is a 1960s external power supply that was very common. It supplied +830 Vdc, +300/+250 Vdc switchable, -130 Vdc bias, adjustable ~50 Vdc bias, +6 Vac filament, +12 Vac filament via a crazy 11-socket plug. It featured external on/off, a "circuit breaker", and could optionally fit inside the company's speaker enclosure.
Older poaler bears (@Owlchemy) will recall fondly the Heathkit phenomenon, whereby inexpensive (relative to others on the market) kits were made for adults and older children to put together themselves! Think of it... soldering, deadly voltage... could never do it today.
As with any old electronics, as @sporkulon can attest to, capacitors will probably be bad, and given the price to replace, worth doing. In the case of this power supply, it was so common that a couple folks have made printed circuit board replacements for the direct point-soldering method of circuit construction, and everything fits in a smaller space (while still using the transformer, choke (inductor), switches, and mounting points.
1. [Comparison of my grandfather's work vs. mine](http://picinfinity.co/d/c4247ab5-e3e9-4ff7-855a-07bb4ccd231f.jpg) (he had lead solder probably!) soldered all diodes, resistors, capacitors to the PCB
2. Old unit didn't have the cover that came with it; wasn't a big deal before but now there would be exposed 800 Vdc so good idea to get a [cover off eBay](http://picinfinity.co/d/6baf1c5a-14d9-43c5-b89e-3d4d5018f1f5.jpg) and [spruce it up](http://picinfinity.co/d/32a46305-5c04-4384-a717-361d85a2f602.jpg) with some matching paint.
3. Hardest part was doing the point-soldering of old wires to the underside of the PCB; several needed extensions. [OLD](http://picinfinity.co/d/773d32d2-e4d2-45c0-9f52-70577a5f49a7.jpg) [NEW](http://picinfinity.co/d/d8267eec-c9bd-4615-bad6-b6ce873a42ae.jpg)
4. Outside view, [OLD](http://picinfinity.co/d/fe9df325-40ee-4d5a-89cb-e8756f522906.jpg) [NEW](http://picinfinity.co/d/38211039-a7a4-44ed-80c4-7d3462c2687f.jpg)
5. [Finished, with cover](http://picinfinity.co/d/11591e15-c161-4b25-8fd8-444629886522.jpg)
I hereby declare this as the coolest thing any of us faggots did today
(post is archived)