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The auto tuner capacitors have to be rated for the highest voltage at the highest impedance. This is an extreme requirement. To illustrate, a 10 watt RF signal will put out a peak 30v across a 50 ohms

They are for a resistive voltage divider to allow both dot and dash paddle signals to come into the Raduino on a single analog-only pin: /g/BITX20/topic/7491087. -Neil N0FN

And Mine :) Red collection card in letterbox when I got home from work…now wheres the soldering iron? Charlie GI4FUE Sent: 11 January 2018 10:39 To: [email protected] Subject: Re: [BITX20] Micro-BITX

Here is a picture of the three resistors that was included with my uBITX kit. Joe Mnson WA4VAG

I am just getting around to installing the Ubitx into a case. I got it before Christmas. In my package of parts were 3 resistors. One, the required 4.7K. But there were also a 2.2K with red paint on

The raduino is the same across all radios. Only the firmware is different

Don't worry, As you may noticed it's impossible to know everything about anything, so we are all students and the only smart option is keep learning. Keep learning: that's one of my motto phrases.

The QRP Labs kit ordering page says 5W. In fact I believe they are fine for at least 10W and this is noted on the LPF Kit page http://qrp-labs.com/lpfkit 10W is well within the specified ratings of

Hi All Having just upgraded my Bitx40 Raduino to v2.02 along with the mods to the board, I find that VFO A and B retain the mode in use on the display but not in tx/rx. The reason for using it like

That would only tell you if the spare contact is working. A failing relay might have no switching action on one set of contacts or all of them. Clark Martin KK6ISP

Thanks' Have you a link to the thread? I'm one of the ones building a PA based on the work of WA2EBY.) Alan

Great documentary. See Netflix. James

Ok, great. Next, you might check the polarity on that electret microphone. If you didn't build it yourself from the supplied parts check it anyway. Make sure the + terminal of the mic goes to the mic

No It looks like i need to refrain from posting and just direct you-all to my website now when the kit is complete. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner -

My comment is in regards to discussion in his group. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner –

This SWR birdge: ? ?http://www.kitsandparts.com/bridge1.4.php

Perhaps you are thinking of this SWR Bridge? It is apparently good for up to 100W, intermittent use.

Jim - thank you - I validated the antenna wiring and it appears good.? I'm also seeing good output on CW (as opposed to SSB voice), so I think that proves out the antenna connection.

Further update...I dont have a telegraph key, but I used a jumper to (momentarily) ground the cw key connector.? I got cw tone in the speaker AND over 5 watts output indicated on the MFJ meter.??

Perhaps , difficult to know whether relays are working . Can we have a small led on the relay drive circuit to indicate atleast drive status of the relay. Whether it is operating or not has to be seen