Cheap tube mic preamp power supply

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FWIW we never send out client gear with house-built or non-certified power supplies. Yes, we build super quiet ones for ourselves, but the liability is just not worth it with paying clients as @emrr and @JohnRoberts have stated. Most of the potential liability is in that power supply.

I will have to look up the model switching supply (for tubes) we tried here on an old Raytheon preamp. The noise level was so high the preamp barely could cover it at full tilt, also I do not think it actually put out its rated current on either side. I knew it would need some filtering, but man it was really bad. Some nice motorboating too, I had to put on a life jacket just to listen, it was quickly removed. I will find the brand/model so we can all avoid it. It is possible we got a bad one, that happens. This was not a situation where I grabbed 100 of them thankfully.

-Tony

P.S. I will be up your way again soon @emrr, Kernersville area around the 1st of May, you have been warned, lol. Hoping we have time to meet up quick this time. Again, you have been warned.
 
To power a few preamp tubes for a single ended mic pre, why can't I build a simple power supply like the ones used in these circuits? (but modified to use a grounded 3 prong power cord and no death cap of course)
No reason at all. Many of us do it all the time. Hammond makes a wide range of mains transformers for just this kind of thing.

Cheers

Ian
 
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