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DIP and 12V rails, too.? Seems like everything's either got 2 AA batteries or is charged by a USB connection. Great discussion on all this!

What I have been asking Santa aka Farhan is for a similar circuit that just plugs in to the existing 8 pins. No need for output caps and such as it is already there! Raj

Solution 3: 78L09. the center lead looks soldered but it is floating but the tab is soldered to the copper below it. The white wire is my fix for prevent the filter relays from clicking during PTT.

Ash and all, Jerry Gaffke provided a valuable link: https://ludens.cl/Electron/audioamps/AudioAmps.html the second circuit (without crossover distortion compensation) seems to me to be more than

I think there was some misspelling there.?? Try Occultation or Osculation. Ron W7HD -- W7HD - NAQCC#7587 OMISS#9898 KX3#6966 LinuxUser#415320

Greetings UT Source is showing high stocks (34000) of TD2822M https://www.utsource.net/itm/p/911560.html ( https://www.utsource.net/itm/p/911560.html ) We still think based on the finding of the GQRP

Probably a good idea. I can think of several devices which I don't expect to disappear anytime soon, like the LM324. Or even the JRD audio chips or the NE5532. I am sure the guitar repair people are

NJM2073D. Also available at digikey . Good pick up Jerry

I solved my Dynamic mic problem by installing the *5 Band Mic Processor by UR8QW*.? I mounted the potentiometers on the front panel so that I now have a mic processor with compression, mic level and

John, others, Given our experience of the non-generic ICs going out of production, it is best to stick to either discrete or generic ICs. The bitx20 will soon be a 15 year old design. The NorCal is

So far no issues with my TDA2822L, but since replacement I power off before touching the jacks As my case is still open I use Arvo's technique to probe the IC. So far no heat issues. John

I've blown up quite some TDA2822 audio chips and they seem to be working on the edge of their ratings. My uBitx has a built-in speaker wired through a 3,5 mm jack which switches it off when a

I just borrowed from occultation! just a T slipped! If you take it from flocculate that would be another!

today I ordered the 5 volt reg. and some of the 2073 chips, what I am wondering is there any one know if there is any problems with installing a socket for the audio chip. I don't want to create any

Since we've already gone off topic, I'd like to congratulate you on your commentary. It appears cromulent, but it's not. (smile)? Sent from Yahoo Mail. Get the app

Hi all. A discrete components design could be more tolerable imho. Plus it leaves more space for hacks/mods. Possibly on a small boatd. Konstantinos, SV1ONW.

This might be of interest to some. DC levels and RF levels at various points in the PA driver section from Q90 onwards. 12.5v supply. ~8W out.

I put this in today just drop right in and its part status is active NJM2073D-ND ( https://www.digikey.com/products/en?keywords=NJM2073D ) -- David ?N8DAH Kit-Projects.com (

After replying that I like the discrete route… I did a little research and the TDA2003, while a different foot print, looks to be good for this application too. Wide distribution/ current part and

Thanks for the good input, Jerry!? I don't have a spare LM386 or a spare rig right now (I'm rebuilding a new ham station from scratch after loaning out my other HF gear to a newer ham).? I'm