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Hello I do have some experience with both the SI5351A in the shape of the RFzero: www.rfzero.net and the AD9850 and AD9912 used in the Next Generation Beacons platform www.rudius.net/oz2m/ngnb/dds.htm

Bob: ? The Si570 is very popular.? Low phase noise and the non-cmos options(LVECL, etc) will go up to 1400 MHz.? The Si564 just came out.? Lower noise than the Si570 and covers 100 KHz to 3 GHz.

While the 9850is common thee are other AD part like the 9851 and many more all more costly but cleaner. The 5351 with the right programming for the microprocessor can do ritty direct by simply

I know about the AD9850 and SI-5351. I like the SI-5351 because it can do 3 VFOs. You could use 2 VFOs for RTTY. I think you could do PSK with a simple inverter. (180degree phase shift) Are there

I've also built dozens of these over the decades. From a lot of experience and a lot of LTSpice modeling, I've come to the conclusion that frequency matching is the most important crystal parameter by

Thanks for posting and sharing, Nick. Some good info. 72, Paul NA5N

OK, after saying I forgot to past in the link. Here it is: http://pages.suddenlink.net/wa5bdu/crystal.html More 72, Nick, WA5BDU

All, The goals of testing are to: Get matched crystals, Remove those with low Q or other defects, Create a group that are more or less the same. Do it simply, but good enough to get reasonable and

I currently use a system called PHSNA. It's been described in QQ and has a Yahoo discussion group with a lot of files and descriptions. There are much simpler ways though, generally starting with some

How do you do the crystal testing? Does Elecraft sell sets of matched crystals? Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark"

I got my 50 ea. 4.9152 MHz crystals a day or so ago so I've fired up my testing stuff and did measurements on ten of them. Average series resonance was 4,913,519 Hz. Q values went from 18,000 to

Soda Pop II sold -- N8DAH Shop.Kit-Projects.com ( HTTPS://Shop.Kit-Projects.com ) Kit-Projects.com ( http://Kit-Projects.com )

HT20 Sold pending funds Soda Pop II still up TNC still up accepting offers -- N8DAH Shop.Kit-Projects.com ( HTTPS://Shop.Kit-Projects.com ) Kit-Projects.com ( http://Kit-Projects.com )

Tuner sold -- N8DAH Shop.Kit-Projects.com ( HTTPS://Shop.Kit-Projects.com ) Kit-Projects.com ( http://Kit-Projects.com )

-- N8DAH Shop.Kit-Projects.com ( HTTPS://Shop.Kit-Projects.com ) Kit-Projects.com ( http://Kit-Projects.com )

Due to financial reasons these items must go: 4SQRP Hilltopper 20 with LCD: 110$ shipped SodaPopII with case ready to go 80$ shipped 4SQRP 4S tuner 50$ shipped MFJ-TNC x 1270-x with 2 yaesu cables 110

I mailed an envelope with a flat 5x7 inch piece of cardboard and an embedded transistor, total weight of 0.7 ounces. The charge was $0.55 for first class mail PLUS a surcharge of $0.15 for special

No, I was just curious if you had any problems with the clerk at the PO trying to charge more than 70 cents. Ray, AB7HE

Yes...you need one?

Diz, Did the PO let you mail the envelope for 70 cents? Ray, AB7HE