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

[Shawn]

Let me second Paul's question.
I too am interested in the purchase of 2 of these boards and am happy
to contribute funds in the advancement of this project.
Shawn

On Thu, 2021-12-02 at 15:09 -0500, paul swed wrote:
> 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 abit.I know there is also a earlier thread on this subject
> 3-5 years ago.RegardsPaulWB8TSL
> 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
> > A15inorder to use a better voltage reference than CR5 (9V) and
> > alsosee if Icould 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 theoriginal design from the MagFieldcircuitry 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
> > masksilkscreen, plated holes etc.) but I did not opt for over-
> > nightdelivery, so itwill 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 usingstandards available.If it performs well, the
> > design will be placed into "public domain".Best RegardsUlf
> > KylenfallSM6GXV
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