[time-nuts] How can I generate a very clean 1 W signal @ 116 MHz ?

Alexander Pummer alexpcs at ieee.org
Mon May 30 10:24:38 EDT 2016


KVG Neckarbischofshofen used to have a crystal in a glass envelope, 
which was made just for that purpose it was third overtone crystal ask 
Bernd if that is still available, of course you would need a low noise 
power amplifier to get that 1W

73
KJ6UHN
Alex



On 5/30/2016 4:06 AM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
> I was thinking about designing a 2 m (144-146 MHz) ->HF (28-30 MHz)
> transverter, using a 116 MHz local oscillator feeding a level 30 mixer.
>
> 116 + 28 = 144
> 116 + 30 = 146
>
> I'm wondering what's the best way to generate 116 MHz with very low phase
> noise. Phase noise at < 20 kHz offset is particularly important, but 200
> kHz would be fairly important. Outside that, it does not matter too much.
>
> The ability to lock to 10 MHz would be "nice", but certainly not essential,
> as absolute frequency stability would not be of prime importance. Getting
> the phase noise as low as possible would be more important. I expect better
> performance can be achieved if one forgets about locking the signal source
> to something else, but I may be wrong.
>
> An HP 8663A sig gen has <-147 dBc/Hz at 10 kHz offset, but I'd hope its
> possible to produce something better than is possible in a commercial sig
> gen that covers up to 2.5 GHz.
>
> Dave
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2016.0.7598 / Virus Database: 4591/12324 - Release Date: 05/29/16



More information about the time-nuts mailing list