Somebody send me the URL to that board thank you
On Fri, Sep 14, 2018, 9:21 PM wrote:
> Got a whole bunch of answers all with useful info. I think I will go
> with Hans' 4 output board to see if the project works at all and go from
> there. Off on a three week tour of Italy to Malta and
Got a whole bunch of answers all with useful info. I think I will go with
Hans' 4 output board to see if the project works at all and go from there. Off
on a three week tour of Italy to Malta and should have the parts when I get
back. This is one of those weird design things so maybe the
Would a mems oscillator such as a dsc6183 possibly work for you? I'm
uncertain if the characteristics of a mems oscillator is compatible with
your application.
For odd frequencies I often head toward a mems oscillator since many can be
programmed to any reasonable frequency. For example one
Nigel
Returned from a business trip this week.
Glad you are making progress.
You are lucky to have an active station to run your equipment.
I do agree that the various equipment now surplus is really nice.
Though I still see strange things at crazy prices on some web sites.
If you do proceed on
The beauty of a $2 arduino and a drop of code snitched from Engineer google.
OK enough of that back to the thread.
Regards
Paul
WB8TSL
On Fri, Sep 14, 2018 at 8:04 PM, Mike Feher wrote:
> Not when I built them in the late 60's and early 70's. All discrete. 73 -
> Mike
>
>
>
> Mike B. Feher,
Not when I built them in the late 60's and early 70's. All discrete. 73 -
Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115
-Original Message-
From: time-nuts On Behalf Of Richard
(Rick) Karlquist
Sent: Friday, September 14, 2018 7:15 PM
To: Discussion of
Rick said:
"The trouble with a DDS is that you need a microcontroller with software
just to baby sit the thing."
Yes, I know what you mean. I wouldn't want to go through all that. I'm
picturing more like the small, cheap DDS boards that show up on ebay.
Maybe the right stuff could be found
Finally, of course, you can use DDS. This is nearly an ideal case for
The trouble with a DDS is that you need a microcontroller with
software just to baby sit the thing.
Rick N6RK
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time-nuts mailing list -- time-nuts@lists.febo.com
To
Those programmable oscillators look interesting. I went to Cardinal the
website to learn more, but they're pretty sparse on details. It looks
like they make all sorts of crystals, OC, TC, and VT XO modules, etc,
and these programmable ones, which are apparently PLL-based oscillators
locked to
I would be interested in hearing more of the more suitable classes of logic
chips. I have a 20Mhz rubidium that I wanted to divide down to 10Mhz
-=Bryan=-
From: time-nuts on behalf of Dana Whitlow
Sent: September 14, 2018 12:55 PM
To: lstosk...@cox.net;
As a suggestion I collaborate with a Canadian ham some 5 years ago using a
DDS as a BFO for the HP 3586. Those details were shared on time-nuts if
they are still in the archives.That worked really well. I recall he was a
VE3??? The 3586 had 2 crystals for the BFO while the entire rest of the
The AC series is really quite good on phase noise; I used it in
the 5071A at 80 MHz.
Rick N6RK
On 9/14/2018 12:55 PM, Dana Whitlow wrote:
Frequency dividers can be pretty low noise, if you choose the right class
of logic. I remember that
at one time in the distant past, LSTTL was considered
I encountered these oscillators on a circuit I inherited
from another engineer. The spectrum of these is quite
dirty and they should only be considered as digital clock
oscillators. An additional annoyance is that they are
not marked with the frequency they are programmed to,
so if you have USB
Frequency dividers can be pretty low noise, if you choose the right class
of logic. I remember that
at one time in the distant past, LSTTL was considered king. Unfortunately
I've been out of touch
with frequency dividers long enough to be ignorant of what works well today.
i'd suggest trying
I'd look for the appropriate crystals. If it will help, I have a 250.00 kHz one
you can have.
Wes N7WS
On 9/14/2018 9:14 AM, lstosk...@cox.net wrote:
Off topic for this list, but you guys are experts in oscillator noise!
Playing with some mechanical filters. Need USB and LSB crystals for
paulsw...@gmail.com said:
> I looked at those types of units. I thought they were factory programmed. I
> may be wrong but was not of the opinion they were single unit buys.
I think the business model is distributor programmed. The distributor stocks
a small set of internal xtal frequencies
Not sure it would be the noise divided by 4. Not a useful answer.
I looked at those types of units. I thought they were factory programmed.
I may be wrong but was not of the opinion they were single unit buys.
Regards
WB8TSL
On Fri, Sep 14, 2018 at 12:14 PM, wrote:
> Off topic for this list,
Off topic for this list, but you guys are experts in oscillator noise!
Playing with some mechanical filters. Need USB and LSB crystals for the BFO.
No one seems to make crystals anymore, especially in the 253 KHz range!
Looking at the DigiKey Cardinal programmable oscillators. Cheap and
Hi, am I right in saying that these typically sell for about £80-£160 used?
this one seems to have a lock problem but I am not sure without looking at it.
ebay /itm/273424114165 maybe bad lamp but not totally hopeless if so.
Pretty sure its repairable but need to figure out what parts to buy in
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