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Regulated Heater PSU for Tubes

Information can be found here, designed by v4lvelover.
https://www.diyaudio.com/community/...ree-gerbers-thread.359636/page-7#post-7116710

Basically with 6.3Vac windings from the transformer, this MIC5156 controller based board with an external low Rd on FET can efficiently produce a very stable and reliable 6.3Vdc.
There is also adjustment available using a trimmer on the board to say 5Vdc. I do not recommend using it for higher than 6.3Vac input unless you change the two large reservoir caps to higher voltage rating ones. This board is supposed to be able to do 2.5A if your transformer is able to supply it. Due to what i have on hand, i have only tested it up to 1.5A, which i feel is sufficient to support most applications. With the ldo specifications, and using 6.3Vac and a 1.5A load, very little heat is generated. Runs comfortably cool with good efficiency, little energy is wasted. Output is rock steady, set at 6.3Vdc when you receive the boards.

Currently, there is no insert terminals soldered to the boards. They are still on their way to me. The user can solder wires directly to the terminal pads easily (like i do) or wait for the terminals to arrive the next few days before i send them out.

I built 5 boards (JLCPCB MOQ), and i need three for my own projects. I am selling away remaining two boards at US$80, shipping (registered + tracking) is included. Basically the cost covers parts and shipping + a couple of Starbucks coffee in the morning to wake myself up to get the boards done, especially with the smd components involved :D. Payment by Paypal FF only please. I have transacted frequently without any issues here if you care to track.
 
Some pics
 

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