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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

Jack, I have your DDS VFO kit connected to my BitX 40 at the DDS jack and it is definitely tuning the radio. Two questions: 1) I understand the VFO needs to output between 4.7-5.0MHz to tune

The trimmer cap in the VFO can be moved around to change the frequency coverage. Mine is currently adjusted to where I start out around 7.1mhz and have 7.2 right in the middle. I haven't compared it