Hi @Mharpen do you have a shematic of the audio amp circuit you used to compensate for the gain loss of the AGC circuit?

I just got my uBITX V3 wired up yesterday and decided to go ahead and load the latest available KD8CEC firmware this morning. After playing around with it for a while I decided that I would prefer to

Hi. Is there an error in the wiring instructions of the coaxes here? -> http://www.nd6t.com/uBITX/Graphics/potmnt2.jpg Shouldn't it be to K3 pin 3 and not pin 14? (In the schematic on hfsignals.com

Yep, i got the 5A LM2596 version on eBay $8.00

Hi I actually have two uBITx radios. One that I have tuned the BFO on and another factory stock. I did swap in the other uBITx into the same cable harness: the "crispy / semidistorted" audio is

Well, looky there! Mike, I hadn't noticed but it looks like Farhan moved the wiring from version 3 (the one that I have) to the other set of relay contacts on version 4 (the one that I am waiting

Here is an example of how it sounds like. SSB signals kind of sounds like someone runs a strong RF clipper on them. If you wait until the last part of the clip you can also hear CW signals. Those

Here is the audio file with a working URL to the file section https://groups.io/g/BITX20/files/180615_1218.MP3

It looks like you were sitting on my deck. Every detail. 73 Willy W1LY

Hello Mike. The amp is a verbatim copy of the Q70 amp including the blocking caps and C52 and R52. It is installed between VOL-H and R70 with a 10k trim pot on the input to adjust the drive. Thanks

Relay K3 has different pin assignments in the r4 schematic compared to prior versions. The AGC mod was created before the r4 schematic was released. 73, Carl, K0MWC

Jerry, that Si5338 while it has four outputs it only has a single PLL, it would seem that only a single PLL to work with would compound the jitter/phase noise problem if there really is one in the

Miguel, if you could get that output up around 225MHz that would be great for those of us in the United States. -Justin N2TOH

Kindred spirits lol 73 Bill K0WHW

Displays functional

Hi, Just a couple of general observations about I2C displays. Yes, the I2C display uses the same pins as the SI5351 (A4, A5) for the interface connection. The SI5351 is a 3.3V part and the bus is set

Problem solved. Comment incorrect display, un-comment correct display. Thanks for all today who helped, and Thanks Dr. Lee 73

Bill KF7YXS There are a number of different I2C libraries. The word "different" is key because some function calls are definitely different. Beauty and curse of libraries is that there are so many

I have yet to make a contact on mine and I think it’s because I can’t really find a good spot for my antenna and not wanting to drill any coax holes in this rental house. How do you like the qrp

Yes, the si5338 has one pll. But with that single pll, the output msynths are done accurately enough that jitter is better than can be done on the si5351 using integer output msynths. Also, you do