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Ouch and double ouch! Just glad to hear that everyone is OK. let us know when you are back on radio stuff. good luck 73 Evan AC9TU

If you don't see changes in uBITX freq error after you change the master cal in MM, then you need to fix the process problem first. I just did the math, and for every 1 hz change you desire in the

Ouch. Power box is one thing...? But the antenna, RIP EFHW.

Hello, i have found this video for Smeter adjustment https://www.youtube.com/watch?v=JOyOAcvnq_8 cdt

Ouch! On the bright side, it's an opportunity to get those antennas configured better.? ;-) Jerry, KE7ER

Evan, Good to know. I gave up monitoring threads about trouble with goofy calibration schemes a year or so after posting 35235.? And repeatedly pointing to it, just search for 35235. Given the poor

Sorry, this is off topic/ on topic, well I don't know. I'm going to try to pay attention to this but I will not be as active for a bit. We are experiencing an ice storm and it has so far done some

Kit From your description, I think that a 5volt line got shorted somewhere.? The LM7805 regulator has short circuit protection that shuts it down until you power cycle the device. I would check the

Jerry, For the stock uBITX Ashhar Farhan published a video on how to calibrate and set the BFO: https://www.youtube.com/watch?v=t6LGXhS4_O8 The only uBITX that I know of that does not use zero beating

And it's unlikely to be the Arduino, right? B/C my UI works fine. I ask because before I replaced the ribbon cable there was some kind of pop and smoke when I turned on the radio, and the display went

The "critique" was in post 37973, but is likely very old news. I have no idea how calibration is done on the uBitx as it ships now. Jerry, KE7ER

Tom, I have no idea what the calibration routine on the uBitx looks like now for the various variants of the firmware. Here's my critique of the original uBitx firmware, and how I thought it should be

Hi, Omce upon a time I was told that those diodes' mostly fail short, not open. I had a two different pairs fail over the years and yes..they were short circuit. The radio front ends (both Ten Tec)

Evan, You can have large static voltages build up on some antenna systems. Could be several thousand volts. An RF choke to ground at the antenna port should be sufficient to deal with these. Though in

Hi Jerry, These are all good ideas for self testing/debugging the uBitx. One additional thing occurred to me. Rather than try to calibrate the dial frequency by attempting to zero beat WWV or listen

Ah, OK. I installed the diodes there. -- Kit Peters, W0KEH GPG public key fingerpint: D4FF AA62 AFEA 83D6 CC98 ACE5 6FAE 7E74 7F56 ED1D Hello to any and all NSA, DEA, or other government or

Kit, I was assuming that you installed the back to back diodes to protect Q90.? Those go on the K1 transmit/receive relay.? Here is a photo of my v4 board: Where did you install the diodes? 73 Evan

The K1 pins? I'm not sure what you mean. -- Kit Peters, W0KEH GPG public key fingerpint: D4FF AA62 AFEA 83D6 CC98 ACE5 6FAE 7E74 7F56 ED1D Hello to any and all NSA, DEA, or other government or

Jerry, Thank you again. I have done some more research and I get mixed hits on the 1n4148 vs a Schottky like 1n5819.? More important is that I see a more complex solution like this one:

Evan, Been busy with other stuff and not following the group much. Didn't realize there were so many Q90's getting knocked out. This should be addressed. In the dim past on the Bitx40, 1n4148 diodes