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Armin, both those are connected under that solder there is a tiny bridge connecting them. The schematic of the Raduino board showed pins 15 and 16 connected (on connector P3) which the clearly are if

Lyn Just to clarify. My uBITX still has the original Raduino in it. The DIY pcb I made was fitted to a VK4PLN Raduino just fopr testing? but is not in the rig itself. The new 'buffer' board will fit

Hi Lyn, Not had time to make up the PCB for it, as yet.? Hopefully in coming week. glenn vk3pe

Thanks, Richie.? The mystery is part of the fun, and frustration. Eddie

I don’t have your reference at my disposal. Do we need a BCI to transmit through? The BCI mid for the ubitx puts a BCI filter in the RX path only. So my question was is will the one I provided work

QST Feb ‘78 p22 BC-Band Energy — A Rejection Filter W3NQN does this look one could transmit thru it?

Ah good to know ...Since I'm the only one that mentioned "in? passing" that I modeled Q90 circuitry (part of the PA chain last I looked) in the hopes that "someone else" might to choose to model it

tek p6100 > extended bandwidth 2215a scope Jim

Hi, It's easily used field portable with the BitX20 or the uBitX or other small field portable radios. Can you see that these radios are not intended to be assembled and then sit on a shelf someplace.

What does this have to do with BITX20? Thanks, Jim K0HW

Hi Fabian, sure I used my multi-meter to test connectivity before I sent my message and I also have? the FCI chip. Please have a look onto attached picture, which shows my Raduino board. You can

Did a count and nearly 50% of the posts in thsi string have nothing to do with: amplifier chain design - best practices. About DBMs, DBM drive levels Low pass filters Spectrum analyzer and probes. K2

RCBG/Carl, R.E. has an opinion.? Venders supply fact. Home brew is speculation and requires testing. uBitx uses the latter, until tested its all a guess.? WHile patterned after many the transformers

Ok yes it was the one post i have write an when load up was deleten i have forget to write it again.. Here re the information from the lost posting Power supply is 12v 3amp or batterypack of 8x1,5v

The small units ....... https://youtu.be/io2eqepRB6g ? https://sites.google.com/view/pd0lew/projects/rtty ? Best, Johan

As I recall, several here have posted that the LO input to the DBM should be about 7 dBm.? That agrees with the following DBM tutorial I found online:

KD8CEC? 3.2 files Download this file https://github.com/phdlee/ubitx/releases/download/1.1/UBITX_Nextion_GUI_V3.zip Extract Ubitx_32.tft for just the tft or Ubitx_32.him for the him file. Marty --

Prototype for the MMIC based bi-directional amplifier replacement. That is not the actual MMIC.... still awaiting delivery. But the transmission line boards are here and the isolation caps, bias

Look at KD8CEC firmware updates, they do work with your display, and do fix the keyer subroutine. But if you stay with the straight key, it won't matter much. Ed KC8SBV

What probe are you using? Raj