On Sat, October 24, 2020 1:24 pm, AC0XU (Jim) wrote:
> Having recently run into major ground loop noise
> issues, I have begun reworking some of my homemade
> pieces of equipment using insulated coax connectors.
There is generally a trade-off between 60Hz noise and EMI when you start
thinking
Corby wrote:
My NBS 106D DMTD originally had all BNC connectors but after finding out
BNCs are not the best for DMTD units I retrofitted it with insulated SMA
connectors.
I used nylon washers on both sides. See PIX.
Note that this can cause problems with RF noise and interference (both
Hi
As part of your “simple replacement” … keep in mind that it needs to act
both as a multiplier *and* as a mixer. The two modes need to be reasonably
separate from each other or you (likely) get a real mess.
Bob
> On Oct 25, 2020, at 4:26 PM, Ulf Kylenfall via time-nuts
> wrote:
>
>
>
Hello Time Nuts,
I'm going to try a two antenna approach - parts are on order.
Buying a 2nd board vs. trying to implement a low-noise amplifier is a wash
for the cost
for the 2nd audio board.
It will require a few board mods - but they are simple.
When I have some interesting results, I will
Disassembled the surplus Rx cell by first disconnecting
the short jumper cable and then unscrewed the brass
part. Inside was a tiny diode, color coded "391"
as have been previously discussed in a thread some years ago.
I recon that if a diode would some time in the future breakan external
There is one of those books on ebay right now in the Books section.
rp
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That doesn't appear to give you 1/4 the base sampling rate as you suggest
with "... to sample at 4 times the desired rate..."
I do something similar on a 1kHz tone, generating I/Q at 1kHz sampling rate
on a bandwidth up to 500Hz, ie 750 - 1250Hz
Samples at 4kHz are S1, S2, S3, S4
Then I = S1 + S2
Thanks everyone for the responses. Enough for now. Time to make anything
happen.
Will let you know and perhaps start a new thread around this.
Regards
Paul
WB8TSL
On Sat, Oct 24, 2020 at 10:17 PM Graham / KE9H
wrote:
> Paul:
>
> The easiest way to convert a single sample into an I-Q
Hi
There are two versions of the 10811, one plugs into the “target” via an edge
connector. If that is the version you have, there are pin(s) that should be used
for the oven ground connection.
Bob
> On Oct 25, 2020, at 7:11 AM, Joe & Gisela Noci wrote:
>
> Well, spent a good few days undoing
Hi
> On Oct 25, 2020, at 3:43 AM, Bernd Neubig wrote:
>
>
>
> Hi,
>
>> On Fri, 23 Oct 2020 19:32:16 -0400
>> Bob kb8tq wrote:
>> Those authors pretty much only focus on *oscillator* design. ( =
>> electronics).
>> Bottom is a “crystal guy”. He focuses pretty much only on how to chop up a
Hi,
> On Fri, 23 Oct 2020 19:32:16 -0400
> Bob kb8tq wrote:
>Those authors pretty much only focus on *oscillator* design. ( = electronics).
>Bottom is a “crystal guy”. He focuses pretty much only on how to chop up a
>chunk of quartz to get this or that result ( = frequency, temp coef, size, Q
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