Hi, dave & the others,
Am 05.04.2015 um 20:51 schrieb Dave M:
Count me in for one (maybe two, depending on cost of the board + parts).
I have changed the regulators to TO-220, it will still require attaching
to some isolated metal plate.
In the prototype I have 5W 5V6-Zeners to drop the input voltage, they
run quite hot (but are not
screwed to a heat sink as intended by their manufacturer.)
The outputs now have discharge resistors, the lowpass now can have
higher output impedance
at 5 MHz, making the 2nd 5 MHz trap more efficient. This is still untested.
The board is slightly bigger, still needs a little bit of cleaning up.
I still can accept tech. ideas for, say 3 days.
open:
enforcing symmetry, changing the output transformer of the doubler back
to 9:1 auto-transformer
for more harmonic suppression & cheap gain, so the output drivers
This is the phasenoise btw:
<
https://picasaweb.google.com/lh/photo/D9udFLWUuJUIqiF2tD0pZ9MTjNZETYmyPJy0liipFm0?feat=directlink
>
I have been working on a design for an elliptical lowpass filter
following a diode doubler and a small amount of amplification.. I
have most of the parts, using a couple of RFExtra's developer boards
(Ebay item 150203651783). Only need a couple SMD inductors and can
start building it. Will be continuing with that in a week or two, when
I get over a minor surgery. Will be interesting to compare to two
approaches.
If it turns out to be a problem to duplicate the board in volume, I'd
really like to get an actual-size PDF of it for my own use.
A .pdf & laser printer is what I have used also.
There are more requests now so we could do a small production run. I'd
like to avoid
having many versions of this.
regards, Gerhard.
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