[DSP-10] Transverters with DSP-10

[P.W. Straks]

Hello Dave and all the other DSP-10 users,

For the db6nt Transverters (and others as well) there is now the 40°
precision crystal heater.
It regulates at about 0.1 Degree on 40 Degrees C. 
Not quite a OCXO but I think pretty close.

You can put it easily on an existing Xtal and there are also 40 Degrees C
Xtal's available, but you can first try out if it works good enough before
ordering a 40 C Xtal.
Perhaps the 1296 MHz Transverter is then stable enough to do PSK31 and other
digital modes.

http://www.kuhne-electronic.de/english/news.htm


For 10 GHz you can build your own 106.5 MHz OCXO, but there is also a good
one available at (also with other frequencies):

http://www.id-elektronik.de/

This OCXO is (on request) also available with a external input for tuning it
and using this input when locking it to a stable source, like GPS 1pps or
Rubidium 10 MHz


BTW: For 2m, 70cm and 23cm, I am using the IC-910-H with a external OCXO
(30.2 MHz) locked to GPS or most of the times to 10 MHz Rubidium using the
controller design of Shera Brooks.

http://www.rt66.com/~shera/index_fs.htm

On 23 cm the result here is quite good now, within 0.1 Hz.
I will use this OCXO in future also for the 13 cm db6nt Transverter as Local
Oscillator:
30.2 x 4 = 120.8 MHz and, this will give, with the transverter multiplying
it 18 times to 2174.400 MHz, on IF 145.800 MHz then 2320.200 MHz (European
Band).
 
This 30.2 MHz OCXO I ordered from HC-Electronics( OCXO-6): 

http://www.hcelectronics.cz/Aver/index_A.htm

 


73,

Paul, pa0ocd

 

  



On 29-10-2004 17:51:10, Discussion of DSP-10 2-meter transceiver
(dsp-10 at mailman.qth.net) wrote:
> I used to use the DB6NT xverter for 1296 with my dsp10 (which was locked
> to GPS). It was OK for ssb/cw/fm but was not stable enough for WSJT modes,
> 
> i had to build an external oscillator for it. The same is true of my
> db6nt
> 10g xverters, an experience shared with many in europe who use
> external
> oscillators such as the G8ACE one http://www.microwaves.mcmail.com/
> 
> Dave
> 
> ww2r
> 
> I found it needed an external oscillator >
> I'm planning to use my DSP-10
> as IF for some 1296 (EME mostly) work and am
> > looking over available transverters.  I believe I would like to use the
> DB6NT
> > MKU 13-G2 unit.
> >
> > Several questions:
> > 1. See no specs on how much 144 MHz drive is required for the
> transverter.
> > Will the DSP-10 be adequate or would I need an amplifier stage?
> > 2. Has anyone used this transverter with the DSP-10 and could give me
> your
> > results, hints, etc.?
> > 3. Any suggestion for a better transverter (within a limited budget)?
> >
> > and slightly off this subject, but eventually it will come...
> >
> > 4. Ideas for a higher power amp between transverter and dish antenna