开云体育

Be careful using N6QW, Pete Juliano's code from the LBS. The libraries for the SI5351 is incorrect. Don't get me wrong, Pete does fantastic work. Our club did the LBS as a group build and we quickly

Self explanatory - //initialize the Si5351 si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0); //If you're using a 27Mhz crystal, put in 27000000 instead of 0 // 0 is the default crystal frequency of

look at that : http://n6qw.blogspot.hr/ http://www.n6qw.com/ http://ak2b.blogspot.hr/ here you will find many interesting stuff. 9a3xz,Mikele 2016-12-06 20:15 GMT+01:00 Jack Purdum

Good to know. My mission is to see more ham projects using microcontrollers and this seems like a good fit. Thanks! 72,73,Jack, W8TEE To: BITX20@... Sent: Tuesday, December 6, 2016

You're not missing anything, Jack. It is falling-off-a-log easy to change the code from 25 or 27MHz. It's not an issue, other than being aware of it. NT7S's documentation makes it very

Joel I'll build the 3.5-5 MHZ one and let you know. 73 Ken BITX20@...> wrote:

Ken, I built the one on the top of the list as it covers 3.5 to 5MHz which is the exact frequency of the VFO coverage, although being A LPF it's going to filter everything above so may not make that

Am I missing something or can't the software be changed to account for the difference? Our VFO has a timing constant in the code that is changed to account for variations in the 125MHz crystal on the

Hi all. Just a word of warning/advice. The Si5351 based VFO (clock) boards produced by Hans (QRP Labs) and Adafruit are not directly interchangeable for use within the many Arduino based VFO

Joel I built NT7S 5-8 MHZ filter and I don't hear any real difference. But the signal into T2 is much prettier than the square wave. I'll do some more testing later, not much can be done at 5:30 in

Hans, Sorry about the ugly square wave, you are right, we can't see it properly on a regular scope, but I was looking for a sine wave which I got after the LPF. I don't know if we need a sine wave

I just got the new 40 m version three board in the mail three weeks ago. Very pretty packaging I might add. Unfortunately this thing seems not to like S9 phone signals in the extra class portion of

Hans, Yes that's the one. Well, I guess I'll stick with the DDS VFO instead, easier in the long run. Thanks anyway. Joel Caulkins KB6QVI

Thanks for trying Tim.? SoCal was a bit far from NoVa for last night's conditions.? 73? Bill

Hi Joel You are referring to this 1-chip VFO stabiliser http://hanssummers.com/huffpuff/minimalist/1chip.html http://hanssummers.com/huffpuff/minimalist/1chip.html. I do not recommend it unless

Hi Jerry I'm not sure if you need a sinewave for the BITX40 - perhaps Farhan could comment on that. Many mixers work better with a squarewave drive. But I am not sure about the BITX40. QRP

My BITX40 is #465. It came wrapped in what looks like an ex-candybox. But it was well-packed and survived the journey well. I had the same problem as you. The initial VFO coverage was ~4870 Khz -

Thanks Ken. Later, Joe, K8MP Sent from AOL Mobile Mail

Thanks Bill. Your rig looks like "Professional Level" work! <div> Sent from AOL Mobile Mail

See below: To: BITX20@... Sent: Monday, December 5, 2016 11:40 PM Subject: Re: [BITX20] Bitx40 varactor tuning/tuning dial? ? Jack,I have your DDS VFO kit connected to my BitX 40