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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

Awesome Nick!

Thanks Dan! I appreciate the response. I did lookup the mic wiring - that is where I started. ? Uniden BC-645 is a Cobra compatible electret 4 pin mic wiring 1-GND, 2-MIC, 3-PTT, 4-RX - I have 1, 2

Hi Everyone. I have almost made it through the backlog of projects, so I should be able to start working on add-on boards again soon. Cheers,

Sorry. Think there is voltage only when the ppt is keyed for the uBitx Dan

Wire the mike that came with the rig and use the plug to the phono mike input. Haven’t looked at the audio diagrams recently but think the dc voltage should show up on the mike line when it is keyed

Step by step.... I have +5 volts on 4 pin connector pin 3 when the radio has power - it measures +5 against either Pin 1 or Pin 2 or the case. Again - from the Uniden/Cobra wiring that I have found on

Thanks guys! 1. CW test produces power out! So far so good. 2. The mic I am using is a UNIDEN/COBRA ( https://www.amazon.com/gp/product/B008CLIB5K/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 )

If your mike is similar to the kit supplied one you will likely need a dc voltage to the mike for it to work. That should already be in the current design. Check the mike connectors for a dc voltage