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"hoping that building a power supply would be simple"

71.81.118.60

In Reply to: RE: I wonder if "AC In" is in reference to the level of ripple in their power supply? posted by 1974 on January 27, 2025 at 07:12:22

I do understand your thinking. Is resale value of any concern? If so, you're very likely better off buying the stock power supply.

If ultimate performance from that circuit is your goal, sure you could probably build a better supply than what they're offering.

But if you take into account the cost of a power transformer (or transformers, if you use a separate filament transformer), a properly sized choke, caps, umbilical/connector, etc. etc. the cost starts to quickly add up.

And that's not even including the chassis. If you're OK with assembling an open power supply on a piece of plywood, then you're good. But if you want the supply in a decent looking chassis, that's where the work and expense really comes into consideration.

Good luck.

Follow Ups:

RE: "hoping that building a power supply would be simple" - 1974 08:29:14 01/28/25 (1)
Resale value aside, I'm not sure that a bunch of components, some of them carrying 300V, screwed to a block of wood is what I'm looking for.

Also if the 6.3 and 300V have a common ground, then the suggested SMPS will definitely not work.
- RE: "hoping that building a power supply would be simple" - FlaCharlie 12:45:50 01/28/25 (0)
  You apparently have not looked at the links I provided earlier, especially the one to the amp my granddaughter built.
  A single 100 Ohm resistor isolates the grounds and it is not simply mounted on a piece of plywood.
  - My 10-year-old Granddaughter's Amp (Open in New Window)
  Edits: 01/28/25

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