Re: KitsAndParts uni-VFO kit
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I've got one of those Uni-VFOs (and another one still in the paper bag, waiting to be soldered).
I think it's a clever project and the small size, use of a pot for tuning, and configuration set by serial port are highlights.
I thought?I'd try my hand at writing my own program, as a way of getting back into plain C, without all the Arduino goodies. I've got it going pretty well, and even added a Morse sending unit so it can communicate with me.?
I'm stuck on one problem in that there's uncertainty around the last digit and it jumps a step or two periodically. I've tried a number of software filters and hardware troubleshooting but haven't calmed it yet.
I'd be glad to share and compare with anyone else rolling their own.
73
Nick, WA5BDU
On Wed, Mar 26, 2025 at 9:47?AM chuck adams via <chuck.adams.phd= [email protected]> wrote: OK.? Patent pending has been removed.? You beat me to it Doug.? But, I
use the small
end of a zip tie.? When I dip into into the blob (sorry Steve McQueen),
there is
a sharp tip at the end of the attached paste.? By adjusting the depth
that you
apply, you have very good control of how much you apply. Especially
important
for the 10-MSOP part for the Si5351A.? I find the paste that I'm using
is a tad too dry.? Would like to have it a little less viscous. (Word of
the day.)
I now have the world record for the speed of a SMD diode going across
the room.
Never to be seen again.? Heck.? Who needs a reverse protection diode anyway?
That's why I buy two of the cheap things.
I wasn't good enough for the toothpick.? I tried it first.? Guess I didn't
invest enough money in the critters.? :-)
Mike, yes it does work.? Great work and a lot of applications thought of.
I know that the thermal time scale is a lot longer than recommended, but
it doesn't
seem to be a problem.? A sample of two doesn't make for great statistics.
I just wanted a cheap way to get started.? Didn't want to invest a lot of
coin of the realm and not do anything afterward.? I'm not cheap but I am
frugal and want to spread the money around.
We don't have to be scared of SMD.? It reminds me of the transition from
tubes to solid state.? We all fought tooth and nail against it because
it was going to just be a fad.? I just wanted to see if I could do it.
thanks guys,
chuck, aa7fo
On 3/26/25 07:04, Doug W via wrote:
> On Wed, Mar 26, 2025 at 01:21 AM, chuck adams wrote:
>
>? ? ?I'll do a video of the patented paste applicator.
>
> looks good.? looking forward to your video.? I play with hot air but
> have never tried a skillet.? I put a blob of paste on whatever scrap
> is at hand and apply with a toothpick.? on an indulgent whim I picked
> up some of these.
>
> --
> /¡ì97.313 Transmitter power standards.
> (a) An amateur station must use the minimum transmitter power
> necessary to carry out the desired communications./
> _._,_._,_
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Nick Kennedy