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Has anyone reported damage to their uBITX (little or no power out on TX) caused by previously keying a QRO rig nearby ?? This was a common problem with the BITX40 as high voltages present on the

Skip, Sorry, I had been in the basement most of the evening. Didn't want wifey to feel neglected, happy wife-happy life! So I headed upstairs after the qso. The band was crazy last night. tim

Here is a nice similar design by LU1AGP for discreet AF amp. I also remember assembling few designs from Elektor as a kid in particular there was a very nice low noise one in a ZN414 based MW

Thats good, what is your antenna ? Raj

It is a V3 ubitx board. I'm using CEC firmware. I get about 10w on 20m and 5w on 10m.

What John and Bill said. Joel N6ALT

Another LED approach that works well is what's used in OZQRP's MDT DSB tx.? As the uBitx is higher power it may be possible to use a smaller coupling capacitor (try 5-10pF instead of 22pF - not

I heard a heterodyne on .277 around 8:30PM local....that was it ...did hear one station on CW calling CQ lower in the band but couldn't make out the call. Conditions are terrible.? don

What John said, a photo or two of the of the three pin mod would be great.

Well there actually is some feedback, it is in the form of those emitter resistors in the final audio amplifier. R75 R77 The crossover distortion may be that in order to properly bias those

Hi Richie, tnx for the pics re your ubitx modular approach . This is? homebrewing in the true sense. Tnx for sharing . 73? Frank??? EI / GM0CSZ??? and KN6WH

Mike and all UBITX enthusiasts, when In looked on the schematic of the new audio amp my first thougt was: why is there no feedback from the output to the input? Please have a look on the very old

Hi all. I’m about to buy another ubitx, but I’m a little concerned about one or 2 of the posts concerning the audio of this latest board. Has anyone with the V4 experienced any distorted audio

I saw one like it at Dayton and almost sprung for it. Looked neat but was a little on the flimsy side. But it looked functional. Dave K8WPE

Mike Hagen, WA6ISP, is selling an "improved" Raduino for roughly $48. It is completely assembled for that price. If you Google his name and call sign you should get an email address for him or just

Most of circuitry is used for both TX and RX, so that is why I asked for TX power output. If TX works, than I would look to those parts not used on TX. Maybe there is some switch (diode or relay) that

iz oos, The Tx power and Rx sensitivity are different issues, I suppose. at times if we carefully tweak the coils(LPF before 1st mixer) , in effect slight changes in their inductance vales, we can

In TX how much power do you get?

Excellent, so just put the .tft file on an sd card, inseart, upload and done. That would be GREAT! Thanks Ian! 73 Nick VK4PLN

I have it on good advice (from Ian) that you will be able to use a 2.4 or 2.8 TJC version with a pre-compile from KD8CEC! Mike ZL1AXG