[DSP-10] OCXO

[Ton Bouw]

Hello Hermann,

Interesting to see what your guys are busy with. I look forward to your
results.
I have seen an article describing a 10 MHz oscillator controlled by the
DCF77 signal from Mainflingen at 77.5 KHz. This might be a cheaper
alternative to GPS control. If there is interest in the article, I can try
to dig it up. It doesn't change the need for a good homebrew OCXO though.

I assume that there must be quite a few DSP-10 rigs in Europe. It would be
interesting to have a list available of those that experiment with it, so
that local (terrestial) experiments can be arranged. If there is interest in
such list, I am quite willing to set up a web page for it.

Hermann, please let me know how far you are with your DSP-10 rig. I received
my EZ kit and am waiting for the DSP-10 kit which I ordered from TAPR 5
weeks ago. Unfortunately delivery of the kit seems very slow, despite the
USD 36 shipping cost.

73's,

Ton, PA0TBR
(the ham from the Netherlands, hi)

----- Original Message -----
From: <DC9UPGermany@aol.com>
To: <dsp-10@mailman.qth.net>
Sent: 17 March, 2002 11:54
Subject: [DSP-10] OCXO


> Hi  DSP-10 folks.......
>
> We are over here in Germany (a small DSP-10 group) working on a good
tradeoff
> between the price and stability on a 10 MHz OCXO.
>
> There are several possibilities to gain as much as needed stabillity for
the
> DSP-10 and his usage for EME or other weak-signal-work.
>
> Long time stability in terms of days are maybe not so much of a concern.
What
> we think, it is most important to have a short term stable OCXO
> in the range of less than  0.1 Hz per hour or so. GPS locked is the most
> wanted design, but is it really needed????
> Some of as are able to pay the price, but there are other easy to achive
> hombrew constructions.
>
> Forehand we like to mention that thing over here are way different between
> you guys in the US and in the European Hamradio community.
> We have to build most of our equipment by ourself. There is no
Surplusmarket
> to purchase fine, but old stuff, and for the sake of satifaction we should
> get the best out of our minds and doit ourselves. We believe huge bulky
GPS
> RX and controllers and PWS and more bulky stuff is firstof not needed.
> The OCXO we are talking about will fit together with the power supply for
the
> DSP-10 and for the OCXC itself nearby the Hammond Box and all 3 units
again
> can be seated in a nice looking small cabinet.
> One very good cristal (cut and polished according to specs) in the price
> range of 20 $ to 30 $, an 358  OP amp, a PWR Xistor and some ordinary
parts
> out of scrap, a prefabricated stable housing and a good soldering iron
will
> doit. It runs at 60 Deg. C in a selfmade oven.....For the beginning what
else
> do we need????
>
> Sheras GPS  solution might be the best to get...but we will build this
oven
> and get the results and publish them.....at   <A
> HREF="www.walter-schroeer.de">www.walter-schroeer.de</A>  (DC8SW)...
>
> Pictures of a equivalent OCXO for the freq. range 106.5Mhz can be seen at
my
> website  <A HREF="www.dc9up.de/id27.htm">  www.dc9up.de/id27.htm  </A>. It
is
> used as a LO for my 10 GHz station and will permit me to hit the freq.
less
> then 20 Hz at 10 Ghz. (Sorry, the writing on the website is in German, but
> will be translated soon !! )
>
> A same design will be used for 10 MHz. After we have finished and built
this
> thing ( it may take some weeks) the complete design will be available at
the
> above website.
>
> By the way, this website (walter-schroeer) could be used as a pool for
> European kitters for information exchange...just use the mailback button
and
> I will collect all comments and remail them up here on the DSP-10 site.
The
> website maybe will be reorganized  to have a webring, depending on time
and
> reflections. We still work on it, so pse check regular and see how it`s
going.
>
> So far we know, there are about 4 hams on the line in the Euro-land for
> DSP-10:
>
> DC8SW Walter), DC9UP (Hermann) , HB9DHY (Mike) and some ham from the
> Netherlands (pse contact me again by mail (DC9UPgermany@aol.com) because I
> lost your mail-adress).....
>
> If somebody likes to know more about, contact me at:    DC9UP@darc.de
or
> direct        DC9UPgermany@aol.com.
>
> 73 de Hermann (DC9UP) and Walter DC8SW)
>
> (To all of you, pse excuse the writing-errors!!!)
>
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