Matt, Congratulations! 73 Evan AC9TU

#v3 #ubitx

Hi David, You didn't actually step on toes. You did add your post to a 'thread' about something else and that reduces your chances of getting the right answers. Somewhere in the files section of this

#v3

Thanks OM Raj!! Will revert after checking! 73

#radiuno #v3 #ubitx

Hello everyone, I would like to trace the cause of not having RF output on the PA of the uBITX v4, under the load of 50 Ohms resistive. Could someone post the waveforms on the oscilloscope at the diff

#v3

Hi Ben, If the bitx 40 is still available and you're willing to post to the uk i will reimburse you for any costs.regards Dsve.,

#bitx20 #v3

My issue was broken legs of gate and drain of left MOSFET. After bridging broken legs, issue resolved.

#v3

I used the single channel version of these on another project and thought they might be good for the uBITx. https://www.onsemi.com/pub/Collateral/CM1213A-D.PDF They are small but pretty easy to solder

#v3

Gordon, Would you like to understand the function of each "KTx" relay, which selection each "KT" relay corresponds to? I also want to improve them. Congratulations on your changes. 73's Rubens py2pvb

#ubitx #v3

Yes you’ll see a DC short because your seeing the input/output winding of T2 the first mixer transformer on the other side of the low pass filter. Skip Davis, NC9O

#v3

I should probably amend that to say "200ma into the IRF510 drain". So with the pot fully clockwise for zero drain current, measure the current from the supply. Then carefully rotate counter-clockwise

#v3

Kit, I agree. The Nano is the most likely failed device. There are a number of things between the control header and the LCD display. Arv, I am not suggesting a new LCD, only a new Nano. In the prior

#v3

Update. The issue has been resolved. I gave it to other Ham. He did not find anything wrong he made modifications as in V5 and its working again.

#ubitx #v3 #power

Here is the link: http://www.hamskey.com/2018/06/ubitx-with-nextion-lcd-cec-firmware.html You will need to scroll down past the description on how to install the software to the schematic that shows t

#nextion #v3

I have very good luck with JLI elements. I have used this one on both uBitx and Bitx40's in the past. https://www.jlielectronics.com/microphones/com-mic-jli-52b/ They make a number of other elements t

#v3

Unlikely that it was static damage. The is a DC path from Antenna to Ground via L1/2/3/4 and T2. Raj

#v3 #ubitx #ubitx-help

Hi Dave, I tapped that relay with the scriwdriver handle, but nothing happens. RX low sensitivity is real, I could hear strong signals on 40m at evening, but I have to keep the vol. control near its m

#v3 #ubitx #ubitx-help

I have seen the K3 relay, the single relay on the left side fail. While you are transmitting, tap that relay with a screwdriver handle. Measure the output and see if it pops up. If it does then replac

#v3 #ubitx #ubitx-help

Send me your mailing address at shytron@.... I have some extra boards. You will enjoy the learning experience.

#v4 #v5 #bitx20 #bitx40 #v3

Attached wireup for v3 and v4. Wireup is the same for v3 or v4. V4 had some changes in the audio amp and I think the nano was socketed but wireup should be the same. Hope this helps. Rick KN4AIE

#v3

Hi Christian, I would like to have a copy of that. My email should be able to handle it if yours can. wrcromwell@... 73, Bill KU8H

#ubitx #v3