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Evan, doing a once over before setting the PA bias, I noticed that I am getting excessive heating of D30, D31 upon Tx. I still have output from the finals. It could be heating elsewhere as well, but

I tried both mods. Not much improvements in audio quality. I observed 59++ signals doing good with little distortion. Signals below 58 are heavily distorted. I have some small TDA2822 and LM 1875 amp

Hello Praba, Two possible mods might help: 1 - Add a 10uF capacitor across C75.? If electrolytic, the + goes to pin 1. (see 9.2.2 in the datasheet) 2 - Add the bass boost circuit described in the TI

Issue fixed... what i did is just made hex file from arduino IDE after compiling and the upload said hex file via Xloader. success.

Makes sense. It does seem rather touchy and the effect on signal strength of the received signal is more like an on/off switch than a range, like you might expect. Anyway, it works and I am now

The attached is Rx audio of my ubitx v6.1. Audio is too chirpy and unpleasant to hear. But Tx audio is good as per other hams reports. I tried several bfo adjustments. Anyone help me to rectify the

To be clear, both the receiver and the transmitter use that mixer.? It translates the signal from the 40MHz IF frequency to the operating frequency in both directions. 73 Evan AC9TU

I figured it had something to do with the reception, as when I first turned it back on and the receiver appeared to be "deaf", but yes, right around the halfway point it picked up again. I appreciate

Glad you fixed it!? The other pot is used to adjust the "bias" for the mixer: The adjustment does not seem critical.? I would set it to the midpoint and verify that the receiver is sensitive and

Evan, I finally got it going! My problem was having more than one problem at a time. Once I replaced everything in the circuit, fixed dry or bridged joints, and put a new set of finals in, it now

Glad you fixed it and that I could be of help. 73 Evan AC9TU

Hello all, and thank you for helping me getting my uBITX V6 up and running again. I replaced C30 this morning and I now have audio. Next will be alignment, BFO, and the frequency display is off. So

I built a new trx ...12m DSB ft8. https://www.qsl.net/py2ohh/trx/12mft8trx/12mft8trx.html It is a simple TRX using one TA7358 and 7 x 2N2222 ... 800mW . 73 de py2ohh miguel

Thanks for sharing! Li

Looks nice. Congratulations! 73s John N4HNO

Hello everyone, I realize I'm late to the topic, but after a course by the ARI Parma association on the uBITX V5, I wanted to try my hand at designing a single-sided PCB for the receiver part only

I got this element and stuffed cotton balls in the housing and get GREAT audio reports PUI Audio, Inc. AOM-5024L-HD-R

Was there a mic input modification for the sBtx DE because I am getting reports of bad or distorted audio. The mic element I am using was the one that came in the uBitx v3 kit. Was thinking of

I have cloned https://github.com/gdyuldin/ft8_lib and added my suffixed callsigns to the test: OE/SP5DAA, DE/SP5DAA, SP5DAA/2, SP5DAA/P (in ft8_lib/test/test.c) Only SP5DAA/P is encoded and decoded