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Thanks Raj and Mike for the info!!! I have had a bad run. I have had 2 faulty LM386's on previous projects, and now this! Oh well, I guess that's just how it is sometimes.? Pez

Pez Mouser has them and Surplus Electronics here in NZ ( https://surplustronics.co.nz/products/4797-tda2822-2-x-1w-audio-amplifier-ic ) Should be sources in Aus Mike

R51 change is only in the RX path. It changes the biasing to Q70 and allows it to handle bigger signals without distortion. Alternatively you can change R50 to 180 or 220K and get the same

Thanks for the suggestions everyone. When I first connected the pot, the wiring was as per the schematic (and therefore incorrect). I has this corrected in the first 10 minutes of operation, so it is

Thanks John, As far as I can determine now, I do think there is a differenced in Nano version. At least one difference is.... the old one has a green led while uploading firmware and the new one has

Hi guys Where can I buy a new Raduino board for the ubitx? I need a spare. Do you think I may contact the seller somehow? Regards

Mine ordered on 12/25 was shipped on 12/20 and came in today. No duties or extra fees form DHL. -- 73, Yvon NU6I

I think so too.. swapping the volume control wires may solve it. I have never had a TDA2822 misbehave and they have been solidly stable. Raj

I'm just completing a uBitx and vhf/uhf build in an ammo can. I'll post details when it's finished. Sent from my iPad

Sounds like the TDA2822 is oscillating. Cheers, Will, ZL1TAO

Hi Folks. Just a little update, all well so far. Had it on receive and it seems fine. txtd on CW into a load and got 1.53 amps.? My problem started by twiddling were I shouldnt have. the Rig had run

As you may have read that the volume control wires are incorrectly shown in the wireup diagram. Please interchange the yellow and red on the volume control. This may solve the problem. If it becomes

No, it should not get hot.

For some reason, Tayda calls them "Serie 2500", not "KF2510".? ? https://www.taydaelectronics.com/connectors-sockets/wafer-housing-crimp-terminal/serie-2500-2-54mm.html (

Hi Nik, I have two questions for you in regards to using the TPA2016 module.? First question is are you taking the audio input to the module directly from the volume pot wiper? That was my take on an

"Multiple speakers and headphones have been tried with no improvement."

Have you tried a different speaker. Clark Martin KK6ISP

Thanks Mvs Sarma. There is no change at 12V. Does the?TDA2822?normally get hot?? I have some spare LM386s here, but I have not looked to see if they are directly swappable. (I have never used

Also limit the power supply to 12V while testing the audio in RX. Regards MVS Sarma

why not try replacing the TDA2822. !! Regards MVS Sarma