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""just a total malapropism (look that up!) WOW! How did you know i had to? It is a gift right? Is it because I'm Canadian living among the Ameriglish/Yankish? It is really no big deal. I make

How about the wiper of the volume pot? Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

For my part I'd be happy with the provision of an audio take-off connector on board. That way I can run whatever drop-in module or external powered speaker I like. Paul ZS2OE

Maybe Claude is your Santa: ? ??/g/BITX20/message/43156 The uBitx needs the extra gain of a 1uF cap between pins 1 and 8 as on the Bitx40. (The 0.1uF cap of post 43189 is likely

Thanks Satish, John and Arv. I did not have the BPF connected at the time of experimenting. But it would probably lower the signal even more. So it's best to get a strong signal before I attempt

Ok my fault.? I assumed that since band select stopped at 2000 khz it didn't go lower.? Tuned in 1530 and it comes in with static but intelligible. -- Jason Schlager KM6AUS

Graham, A current limiter on the PA is not a good idea. That would be the same as overdriving the PA and causing "flat-topping". That causes all kinds of spurious responses in your transmitted signal.

Does the 2073D work as well or better than the TDA2822? thanks, Paul K0ZYV To: [email protected] Sent: Wednesday, March 7, 2018 9:45 AM Subject: Re: [BITX20] Micro BitX No Audio TDA2822?

I like this solution. I can't quite see what is printed on your unit but it seems to be an SOT-89 type package. I can't find any 7809 units in that configuration. I can find them in the D2pak or the

There's more than one failure mode. The bad clones like the DX can't tolerate 12v. A good part might eventually go if you exceed the power dissipation rating by running it at high volume with a 12v

Well it is time to get off the Pot and ship the first of the new Ubit RaduinoUMax. Working like a beaver here since the PCBs arrived Friday! The MAX is for the 16 Added I/O pins on the end of the

Ron, The audio is available from the yellow and green ground. You could connect that to an ampli speaker and confirm. If that is working then replace the amp U1. Raj

Looks like a fine solution. The fact that the 78L09 inherently limits current to something reasonable is a bonus. And fits in there perfectly! Might be a little bit easier to just rip that trace out

https://github.com/afarhan/ubitx The Ubitxv3.pdf has it If you have no sound of any kind and the U1 chip has TDA2822 WX on it then its a safe bet the chip is blown. You have a few options for drops

What were the marking on those chips that the club was blowing up? Anything reputable seems to work fine at 12v so long as you don't abuse it with excessive power out.? Though reducing the supply

Ok, I am new to this group and have just assembled my micro bitx.? I sent an earlier message to the group explaining that I have no audio.? After reading some of the posts regarding the TDA2822

Thanks for the reply.? I'm using 1.04 and indeed the error occurs when reading. error message error receive length = 1/1027 73, David K0PD

Kudos should go to Allard. He's the one that found the NJM2073D ? ??/g/BITX20/message/43140 JRC does not strike me as a second or third tier clone manufacturer. And Mouser is

Howard, Thanks.? I found it at ubitx.net Dan W2DLC

What brand of TDA2822's were blowing up on you? I would not expect a short to ground at the jack to blow the part unless? you had the volume cranked way up. And I'd think the short would have to be