Yes. I noted that some sites disagree on which is a Type I or Type II in the attached PDF. Mike K5ESS

Dave, They are different modules. Either might have either AD9850 or AD9851 DDS chips. See the attached file. The file also shows an adapter board that can be used when needed. The modules are becomin

I used tin plated steel sheet from Hobby Lobby. It cuts easily and solders very well. See attached on right side. Mike K5ESS

Check out the group at HBTE@groups.io. There is currently a discussion about a spec anal built mostly out of ebay modules and workable up to 2 GHz. Mike K5ESS

Finally completed my PHSNA (after three years). Built it in a re-purposed HP-435 chassis. Took advantage of the 435's 50MHz, 1mW power reference and included it. Also included a second channel. Guess

Does anyone have a reliable Ebay (or otherwise) source of AD9850 and/or AD9851 chips? Ebay has some advertised as low as $9.50 for 9850 chips but I have no experience with any of the suppliers listed.

Well as a matter of fact you can get them on ebay cheap(relatively). Item 183406561654. But you better hurry, there's only one left ;-) Mike K5ESS

David, That module is the wrong form factor to fit on the PHSNA base board. Here is one with the right form factor - Ebay item 262505118496. I can't vouch for that supplier as I have not used them. Mi

I would offer a word of caution on the AD9851 modules. The Type I modules (three rows of seven pins) have been very popular in VFO and antenna analyzer projects. This has resulted in a doubling or gre

Curt, The PHSNA needs a fairly pure signal source to give accurate results, generally meaning the signal source should be a sine wave which the AD9851/51 can provide. The SI-5351 has a square wave out

A new net devoted to Makers (DIYers, homebuilders) has started up on Echolink conference node 9229 (*TECHLINK*). All those interested in building their own “stuff” are invited. The net is on Sunday an

The board is 1.64 X 1.183 inches. The single row of 7 pins is spaced 1.4 inches from the inside row of the dual 7 pin headers. Mike K5ESS

Sent: Sunday, November 12, 2017 10:05 To: PHSNA@yahoogroups.com Subject: RE: [PHSNA] Re: Reminder - Maker’s Net on Echolink Reminder. Sent: Saturday, November 04, 2017 18:37 To: PHSNA@yahoogroups.com

Reminder.

A new net devoted to Makers (DIYers, homebuilders) hasstarted up on Echolink conference node 9229 (*TECHLINK*). All those interested in building their own“stuff” are invited. The net is onSunday and s

A new net devoted to Makers (DIYers, homebuilders) hasstarted up on Echolink conference node 9229 (*TECHLINK*). All those interested in building their own“stuff” are invited. The net is onSunday and s

A new net devoted to Makers (DIYers, homebuilders) hasstarted up on Echolink conference node 9229 (*TECHLINK*). All those interested in building their own “stuff”are invited. The net is on Sunday and

Have you tried opening the Rset pin on the AD9850? The resistance between this pin and ground sets the DAC full scale output current with the relationship Iout = 32(1.148 V/Rset) Doesn’t say what “V”

I’ve replaced the 30 MHz oscillators on several of the AD9851 modules and had no trouble removing the old oscillators using my hot air soldering station. I didn’t replace them because of a failure, ju

I assume you’re talking about the input resistance to ground. It’s shown as 50 ohms because that’s the output impedance of the driving device. If the driving device output impedance is 100 or 200 ohms