Are you using a tin/lead solder? If so I use Kester 951 low residue soldering flux. I have extra 951 flux if you need some. I also have 959 flux if you could use that. I have found on SMD soldering,

Dear All: I have bought a liquid flux which contains Dimetilcarbinol to solder my AD9851 chip, the problem that I have is that the Tin causes bridges between some pins. I have seen videos where

I ordered an AD9851 module via eBay. Got it yesterday. Connected it to a Type II PHSNA board today. Had a cockpit issue (not unusual for me) but now it's working fine with the Windows GUI.

I ordered two modules at different times from this outfit. http://www.ebay.com/itm/131502143562?_trksid=p2057872.m2749.l2648&ssPageName=STRK%3AMEBIDX%3AIT Both came within two to three weeks

I ordered an AD9851 module from a Chinese eBay seller on Dec 6. It arrived yesterday, Dec 17. It appears to be the correct module. I haven't connected it to anything, so I don't know if it works or

you might add also ALC section as add on and thereafter you get constant output across full range . Here is the link to the ALC element. CWTD - May 26, 2014 CWTD -

If I was starting all over again, I'd get the DDS-60 module. Yes, it costs more - but it has a buffer amp and low pass filter, ready to go. Just my $0.02. --Alan Campbell

About a month ago someone posted on the list about an ebay seller listinig AD9851 modules for a reasonable price. I decided to give it a try. BIG MISTAKE! The seller sent me some other module, not

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the PHSNA group. File : /K1RF/PHSNA Pwr Meter Rear.jpg Uploaded by :

Oh... I just remembered that I could do that because I am using a 5V op-amp! 73, Gary WB6OGD

>Regarding the pot, I think Jim has a detailed procedure that explains it better ... but you are setting the value >from the AD8307 that gives a full house count in the Arduino. It can't go any

FYI, here's a plot of a DDS-60 output from 1 to 61 MHz with the output level set to 0 dBm at 1 MHz. 73, Dave Collins - AD7JT

Haha, we can't have those old analog scopes voting! I couldn't find the info on my DDS-60's output so I ran a plot on it just now and see that I'm at +1 dBm at 2 MHz decreasing to -3.5 dBm at 60 MHz.

Nick: My mistake in describing the falling power as 6 dB per octave in my last e-mail. Must have been a brain glitch. Real answer is that the output voltage from the synthesizer is level at 350 mV

I've posted a file showing some different ways I've constructed Experimenter Boards (still in progress). May be of use to others. And by the way I disagree... DDS Modules ARE fun... ;-)

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the PHSNA group. File : /Couple of Ideas for Experimentor Board.pdf

Glad you're making progress, John. Your device doesn't need to be calibrated in terms of absolute power to do most of its functions, as Will noted. But you do need to have the slope and intercept

The level variation topic has been covered in may 2014 under the heading "Automatic Level Control Techniques for DDS-based Designs" on CWTD this Tuesday at 8pm ET" by N2APB vu3zmv

Hi, Jim I think you mean 4.95v Cheers, Will On 12/12/15 13:39, n5ib@... [PHSNA] wrote:

Glad it's all working, John. It is a fun and useful tool in the shack. As Will said - the trimmer is to set the reference voltage for the Arduino's A/D converter. It normally is set as close to BUT