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So in following the part of this thread that is strictly related to Huff and Puff, was the original reason for the Huff and Puff circuit to create a manual VFO that would jump and hold in accurate

Jerry I think we are still talking about two different animals. H&P does not normally flip back and forth between two different frequencies. It tries to hover around one particular frequency. If the

I accidentally deleted my previous email on this, reposted havre reposted again. Arv suggested to change from “ View all” to View Digest.”. I have selected “No emails” and am still getting

After thinking I needed to get an SWR meter for checking my 2M Larson antenna, I suddenly realized I'd be miles ahead and better off with the Antuino. I ornded one on Saturday and hope to get it soon.

Mine came too with the enclosure and perfectly aligned. The Output Port in SNA mode delivered in my unit more than -20dbm so for accurate measurements I use attenuators. Mine was one of the first

Just a though. If I was willing to allow relaxed expectations for jitter and short term accuracy, I wonder if I could put a varactor diode in the xtal circuit already on an Arduino Nano and then

Another possible way to remove pins inserted in a nylon connector block is to use a common butt splice. After removing the insulation, cram the sleeve over the pin, into the nylon block, and this will

Ditto, Evan. I'm constantly learning related and unrelated info here and hope no one is discouraged in posting their thoughts and results from their experiments. Personal gain from this is one of the

After watching the video in the first link below, I think this is a primo way to go. The video is excellent, in fact, at least in my opinion. However, this generates another question: If I install the

Good suggestion, Evan. I just called my son and he said he's too busy at the moment to go back and check but I forwarded your message to him to check this. I have heard that some super-duper toasters

Hi Arv, This is good information you supplied while I was slowly working on my last message. So, the Huff and Puff method may introduce a constantly varying low frequency phase shift. That makes

? [email protected]> wrote:

This is an clever way to use an AVR chip to stabilize a 10mhz oscillator without a pre-scalier. Just use the 10mhz oscillator as the main CPU clock. Here is a GPS stabilized frequency reference by

Jerry I suppose that in a very broad description one could say that H&P is a PLL. Just depends on how deep one wants to go into what the tiny gears are doing deep inside. Arv ? [email protected]>

Tom, wb6b Using H&P to "stabilize" a 10 MHz VFO or crystal oscillator with a low frequency clock derived for GPS or WWV sounds interesting. Way back when we were playing with H&P, I did something

Hi Mick, I received a V6.2 ?BITX about 6 weeks ago and confirm that my 'digital' connector looks like yours with the wires cut. You can use a small probe or small straight/minus screwdriver to push

Hello Evan You're becoming my mentor - very much appreciated. I assume then that the numbering of that plug starts at A-Zero one end (Black) though to A7 Purple at the other end. My encoder arrived

H&P is not a phase locked loop in the sense that we usually consider it. There is no "lock" situation involved. As Farhan mentioned, H&P continuously detects whether one edge of an HF cycle leads or

If you have a uBitx and wish to experiment with sine waves instead of square, perhaps add a low pass filter to each of the three Si5351 clocks. The VFO at CLK2 would need to select from multiple

Farhan It is possible to reverse the H&P design by dividing the VFO down to LF and letting it be synched with a very stable HF reference (WWVB or GPS or TCO). Result is the same when derived steering