Cheap commercial???? Expensive comercial yes. Lots of vendors who will take your money. OK We have more definition. Its Epay time go purchase a PTS synthesizer. I picked them up non Epay for $100 or less. Very nice and its far less expensive then buying new. Regards Paul WB8TSL
On Wed, May 15, 2013 at 1:14 PM, Chris Wilson <[email protected]> wrote: > > > > Re: Trimble Thunderbolt, any easy way to create 500 MHz > > > > Richard - > > > I can think of several ways to do this, but "easy" depends upon > > your skill set and the equipment you have. Actually - none of these are > easy! > > > I have done a lot of synthesizers and sources over the years and > > here are some thoughts; hopefully helpful. > > > 1. A straight class C multiplier chain. If you use push pull odd > > order multipleirs and push push doublers to cancel out the > > fundamentals, the inter stage filtering becomes easier. Requires > > discrete old-fashioned RF Design methods and perhaps a filter design > > program. X5 filter, X2, filter, X5, filter will do it, with low > > power bi-polars, but the filters have to be multi-pole to keep the spurs > down. > > > 2. Use one of the modern phase lock loop chips with internal VCO > > from National, Analog Devices, and others. The down side is that > > most of these require an associated PIC or similar processor to load > > - even for one frequency. However for one with the required software > > skills this would most likely be the lowest cost and most straight > forward approach. > > > 3. Cook up your own PLL with discrete pre-scaler, phase detector > > and loop amplifier. Easier than #1, harder than #2 except for the > software advantaged. > > > 4. Mix down to IF PLL - eliminates the high speed counters but > > required a low output multiplier to create a reference line near 500 > MHz. Complex. > > > Any of the PLL schemes will have fewer non-harmonic spurs and some > > makers web sites have tools to help with the design of the loop filter. > > > -73 john k6iql > > 15/05/2013 18:12 > > > My skill level is pretty low, so was hoping a fairly cheap > commercially made solution was possible? Thanks for the ideas so far > everyone, appreciated. > > > Will draft out a basic description of what I am attempting to do > later, should still be working :) > > > > -- > Best Regards, > Chris Wilson. > > _______________________________________________ > 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.
