would anyone be interested in a reangemaster?

it will be available in about a week after I get them and test them out. will only be selling one of them. keeping 4 of them and the 3 gps oscillators.

your gonna get trashed at night no matter where you're at. that is the nature of part 15 am.

Rearrangemaster

That's cool, sell a few of those old units and then you can get another new unit to add to your cluster.

I hope to hear how it goes with the multiple transmitters, I'd like to know how the GPS phase locking system comes out in tests.

I wonder if anyone has tried to sync their station's carrier to WWV's carrier directly? I'm thinking about the 'atomic clocks' that have been around for years, and radio stations would have had access to WWV before those. Hams would set harmonics of their own crystal oscillators to zero beat with WWV to use as secondary frequency standards, as markers for the edges of ham bands.

I'm guessing that synced transmitters weren't such a concern in earlier times, but now beats are seen as more of a problem.

Boomer

You have a DDS carrier current transmitter? Cool, pretty advanced.

I think that's a yes, on the GPS, have a look at this PDF:

knology.net/~gmarcus/VFO/GPS_Sig_Gen_v1_1.pdf

He shows stability to .3 cycle, or 300 millihertz at 10 mhz, so at AM broadcast frequencies, due to division, that should be around .03 hz, 30 millihertz!

I like that it uses Arduino Nano instead of a PIC chip for easier programming, and the whole thing can cost less than $50.

That would put out a carrier source to substitute for your transmitter's own carrier source, probably the easiest way to apply this to your carrier current tx.

How does the GPS module for the Rangemaster get a signal, is it a remote unit outside of the transmitter case?

Boomer

Then if the transmitter has an external reference input made for GPS, you should be good to go. I've seen those inputs on commercial transmitters as a BNC jack. It would be interesting to see if you locked yours if you were locked with other stations on the frequency.

GPS lock was one of the points proposed in 'AM Revitalization' to lessen beat interference.

The state-of-the-art transmitter would have all internal references locked to GPS, carrier, mixers, and if stereo, the pilot, but that's above hobby expectations at the moment.

TV transmitters have been doing it for years, locking many of reference frequencies that NTSC used to one another. Video carriers were locked to prevent beat over the air.

Glad you met your monetary goals, and I hope to hear more about all the things your station is doing.

Boomer