[time-nuts] Re: 5065A - A15 (PSU)

[paul swed]

Ulf I would have replied off list. Are you intending to sell blank PCBs?
I was recently thinking about the same thing as I watched the cfld move a
bit.
I know there is also a earlier thread on this subject 3-5 years ago.
Regards
Paul
WB8TSL

On Thu, Dec 2, 2021 at 11:15 AM Ulf Kylenfall via time-nuts <
time-nuts at lists.febo.com> wrote:

> Since the A15 regulator board is mentioned...
>
> I recently decided to try to improve the Voltage Regulator board A15in
> order to use a better voltage reference than CR5 (9V) and alsosee if I
> could reduce the drift and noise of the Magnetic Field winding.
> After some experimenting, I am reasonable satisfied.
>
> The board has been completely redesigned.
>
> The drift and noise of the +20V is reduced. Thermal driftcompared to the
> original design from the MagField
> circuitry is also reduced significally.
>
> Modern thru-hole components are used facilitating manual assembly.
> A total of 10 PCB's have been ordered (Double side, solder masksilk
> screen, plated holes etc.) but I did not opt for over-nightdelivery, so it
> will be another couple of weeks for them to arrive.
> I will assemble a board for myself and, unless covid makes itimpossible,
> take the 5065A to my former employer and evaluatethe performance using
> standards available.
> If it performs well, the design will be placed into "public domain".
> Best Regards
> Ulf KylenfallSM6GXV
>
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