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Mike, we calibrate it using a reference 10 mhz by zero beating it. The calibration may slip. It is best to calibrate it with WWV.

Any new features or bug fixes?

I found this interesting: http://novicehistory.slafetra.org/1971-75/index.html ( http://novicehistory.slafetra.org/1971-75/index.html ) I remember a lot of those milestones in the 70s..getting a WD

All caps have a rated voltage. That is the max voltage you apply to it. If you exceed this voltage the insulation between the "plates" of the cap will break down and the magical smoke will be released

One other question. Can the 10 MHz output be used as a frequency source for calibration purposes?

Thanks. I had already ordered it and saw the video of it not in a case. Now I can sell my MFJ-259.

It is a fully tested unit in the all metal case. It has an internal battery case for 6 AA cells. Two SMA connectors.

Does it come with the case?

The voltage rating on the capacitor is the maximum the component can “deal with”. It works absolutely fine at lower voltages of course and it is best to give some headroom for example on a 12v

Can someone explain the reasons for certain voltages listed on any schematic for the electrolytic caps, AND what problems could arise if one used a cap with a larger voltage rating? How much higher a

Can you guys wait for me to say it? (Grin)

Good news. Everyone has been waiting. Thank you.

Good work Ashar! http://www.hfsignals.com/index.php/antuino/

Since the entire circuit set is 12V or less, your 16V caps should work just fine. Sent: Monday, August 12, 2019 12:40 AM To: [email protected] Subject: Re: [BITX20] AGC Circuit for uBITX Featured in

Thanks.? Any thoughts on voltage rating for the capacitors, especially the "big" electrolytic ones?? (10uF, 100uF, 470uF... I'm assuming they're electrolytics.)? I looked at the Hycas schematic,

As I recall, the JackAl AGC circuit is just the Hycas AGC circuit lifted from QST December 2007. Al added a couple of things like a switch to turn it off. The FETs are nothing special. A 201 and a 102

I agree: the video was nice, but lacking. Many very basic facts were left out. Seemed to be aimed at hams who already knew about the uBitx and just wanted to see one. -- Donald, KB5PWL

I'm looking at possibly lifting just the AGC circuit out of the JackAl design, and seeing if I can stock it out of my junk box.? But... the only JFET's I have are MPF102, J201, 2N5486, and 2N4393...

For transmitting CW, clk2 drives mixer d1/d2 at the transmit frequency.? The modulator, 2 crystal filters, and 2 IF amps are not used. When transmitting SSB, all of that stuff must work. Jerry, KE7ER

Asher, You may wish to contact ARRL and ask permission to host a PDF of the review article on your own website. I'm not sure what the arrangement is for that sort of thing, but I've encountered that