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Thanks Marty, I tried to follow what Jack had as far as calculating this and I think I got the TW, but not the clock number.. It seemed my numbers were coming up wrong.. Close but not like your

I ran this into Excel and got 0.0343587601826567 for the tuning Constant. Copy and past values from the spread sheet changes the precision from the cells. Hope that is what you wanted. 73,Marty WD9GYM

Jack, I'm having a bit of a hard time grasping this.. In my case my VFO is showing 7025.200, but I need it to drop by 200 to show 7025.00 and align with my signal generator signal. I did the one

Got my number 2 49'er working and the receive is there... Still need to do the TX but figured I'd get the VFO calibrated first. Since I don't have a version of excel that will open this new file can

Nice! Thanks for the contribution...

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SoftwareControlledHamRadio group. File : /My_Tuning_Constant_Calculator.xlsx Uploaded

Hi! I think I have the tuning constant figured out. I was stuck at the end and reading thru Jack's message I saw that the TW needs to be divided by the VFO display frequency on the LCD. On that last

Nice Build...love the case! The BCI filter (see early photos) I detail will knock the slats out of any local broadcast interference. I have an article coming out on it in CQ Magazine this summer. That

The receive is pretty good except for occasional BCI that seems to be common in these simple transceivers. Because I did not have the correct transistor for the final, output is less than a half watt.

Hi DuWayne, Very interesting project. I liked the can enclosure, very creative. How is the performance of your Canned Frog ? I also noticed that you have some cool projects on your blog, keep us

Hi Dennis, Please let me know if you discover any solutions. I am not having this *exact* problem. When I turn on my 49er with the DDS VFO connected, I only get hiss out of the headphones. I never get

I built a different VFO controlled 40 meter transceiver using a Frog Sounds transceiver, Arduino, si5351 breakout board and an OLED display. I have several posts with details on my blog. DuWayne's

I agree. I never flirt with the band edges that close anyway. No sense doing something stupid...again. Jack, W8TEE To: SoftwareControlledHamRadio@... Sent: Tuesday, May 3, 2016 7:14 AM

The difference of 200 HZ may not be a true measure if you use a frequency counter. I have three very good counters and they are all off by at least that much. A better measure is to use a high quality

If you take 2^32 and divide it by 125000000, you get 34.359738368, which we will call the "clock factor". The frequency you want is 7.061.8. So what we want to find is what tuning word will "make"

If you're interested in QRP, check out the FDIM conference that takes place just before the hamfest. It is also in Dayton and starts on Thursday. The group publishes QRP Quarterly and it's a fun

Hola! This is not directly related to the 49er project but I wanted to ask if anybody in the group is planning to attend Dayton this year ? So far, I'm planning to go Friday and Saturday. Of course

Hi! How did you find the new tuning constant ? The screen on my 49er reads 7.062.0 versus my frequency counter showing 7.061.8. I'm a bit stuck finding my new tuning constant. The formula shows FOUT

Ok, I have done extensive testing of the unit and here is what I have found: the delay is exactly 30 seconds (I was really off with my previous estimate of 2 minutes). As soon as I depress the

Here is some additional info. The delay is experienced even with the Forty 9er not connected to the DDS. I put both of my Forty 9er boards on a test stand with nothing but an antenna, headphones and