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https://soldersmoke.blogspot.com/2019/01/soldesmoke-podcast-209-skn-old-rigs.html

Do you have the keyer jack wired up?? If not do you have a 4.7k resistor between pins 2 and 3 of the radiuno? -- www.bitxmap.com ( http://www.bitxmap.com )

Listen to see if the xmit relay is cycling. Take a paper towel tube and place it over each relay to determine if one is cycling. If so, look on the schematic to see what that relay controls.? If

That is what happens to all three of my ubitx radios. The work around that I have used is to not plug in mic when turned on. Welcome from N.E. Mo. 73 Dave

Jim, If the mic connector is common with PTT then I suggest you try switching the PTT and mic contacts. Raj

Hello everyone, I've sent several messages in the past asking about why my uBitx clicks (relay) as if it's trying to transmit when I connect a mic to the jack. I've even sent some images of how I

The heat dissipation on 24V really is high - i stick to 13.8V and 30W on the meter. The PA is still to be analyzed regarding spurs - this is going to be done in the near future.

I was baffled by this too. All a bit strange. For uBitx V 4.3 calibration Here's what i did: Change band to 20m, attach a dummyload, or a decent antenna for 20m, with a low SWR. Use Your frequency

With the Raduino otherwise disconnected, can you plug its USB port into a USB line from your computer or a cell charger? That will power it up on 5v and you can see if it is displaying and acting

Playing more with the uBitX, currently “breadborded” (wired up with alligator clip jumpers) on the desk. I found that it is going into transmit during the calibration phase, and that appears to be

A consideration here is to wonder if any spurs, etc., get amplified with the amp. May need more LPF's to keep it within FCC specifications. Just a thought. Bob —

Got more options with an eBay search... https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=HF+Power+Amplifier+For+FT-817+IC-703+SUNSDR2+PRO+KX3+QRP+Ham+Radio&_sacat=0 Bob —

Reply : Some of the photos I have seen have marginal looking? OPTs on them as in things that look like longitudinally split core coaxial cores. 2.? THe fully assembled versions will have a heat

*Thank you Timothy. Heres a link :

Right, the module seems to be sold by many different sellers in asia. Dont expect to get documentation or service, they just sell it. The boards are named "XF-P100" and "XF-LPF-HF". ? I am not

There is also an older format XLS file in the folder if required. /g/BITX20/files/VU2ZAP/uBitx4%20voltages.xls ( /g/BITX20/files/VU2ZAP/uBitx4%20voltages.xlsx )

Ted, Just uploaded into files section RC RX/TX voltages without modulation. See files \ VU2ZAP folder. Power supply adjusted to 12.0V during RX and TX. Hope it helps! Cheers Raj

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* uBitx4 voltages.xlsx *Uploaded By:* Rajendra Kumar

https://www.ebay.com/itm/90W-HF-Power-Amplifier-For-FT-817-IC-703-SUNSDR2-PRO-KX3-QRP-Ham-Radio/182056979298?hash=item2a63710b62:g:d~UAAOSwP~tW6cCQ:rk:13:pf:0 this vendor is top-cc* in Shanghai -

If you've got it working to your satisfaction, thats probably a good place to stop .. Jim