Oh I actually understand the radio. I was looking at the wenzel and will guess that would be quite expensive. This from a flea market junky. Regards
On Thu, Dec 23, 2010 at 12:24 PM, <[email protected]> wrote: > Because the Rockwell-Collins HF80 has sensitivity and selectivity which are > avaialble only in Ham gear costing 7000+ definitely not in the > 'inexpensive' category, it's transmit signal is also far cleaner than most > synthesized HF Rigs. > > So it makes sense to upgrade the reference oscillator to use this radio > with more modern modes such as PSK31 and coherent CW. (Occupied bandwith > less than 5 Hz) > > Scott > Sent from my Verizon Wireless BlackBerry > > -----Original Message----- > From: Joseph Gray <[email protected]> > Sender: [email protected] > Date: Tue, 21 Dec 2010 22:39:38 > To: Discussion of precise time and frequency measurement< > [email protected]> > Reply-To: Discussion of precise time and frequency measurement > <[email protected]> > Subject: Re: [time-nuts] Question on GPS and reference standards > > Not knowing all the particulars and requirements, I may be off base, > but instead of spending money trying to frequency stabilize a 20+ year > old radio (HF-80), wouldn't it make more sense to spend it on a > modern, inexpensive HF rig? You can even get a TCXO option for some > rigs. This should be stable enough for most common HF data protocols. > > I assume that this is for Amateur use? If not, then my comments may not > apply. > > Joe Gray > W5JG > > On Tue, Dec 21, 2010 at 9:48 PM, Bruce Griffiths > <[email protected]> wrote: > > A conjugate regenerative divider will have asinewave output. > > It only requires a mixer an amplifier or two and a couple of bandpass > > filters. > > It will have lower phase noise than all(?) alternative techniques. > > > > Bruce > > > > Tom Van Baak wrote: > >> > >> A good question for the group... > >> /tvb > >> > >>> Hi: > >>> > >>> I have both a GPS Frequency standard (Trimble Thunder Bolt) which > outputs > >>> the 10 > >>> MHz reference and also the 1 PPS signal. In addition, I have a Collins > >>> AEU unit > >>> which has a 10 MHz Rubidium reference inside. Both units work well and > >>> produce a > >>> very accurate reference signal for the units that require a 10 MHz > >>> reference. > >>> > >>> The challenge is that I am looking for a source of a 10:1 frequency > >>> divider so I > >>> can create a 1 MHz reference for my Rockwell Collins HF-80 system. Can > >>> you > >>> suggest a source of a high quality frequency divider that outputs a > >>> (nearly) > >>> sine wave signal? We only need two units - one for production and one > for > >>> our > >>> development lab. > >>> > >>> The object is to provide a very accurate source of 1 MHz and 10 MHz to > >>> the > >>> various radio systems used in our disaster and humanitarian relief > radio > >>> network. When you send data, you need to be exactly on frequency. > >>> > >>> Any help would be great. Just need to be pointed in the right > direction. > >>> While > >>> we could try to design something to meet this objective, I am sure that > >>> someone > >>> has already done this. > >>> > >>> Thank you. > >>> > >>> Kevin > >> > >> > >> > >>_______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > > > > > > > >_______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
