Stick with the TDA2822, it works fine.
Of the TDA2822 types that the uBitx shipped with,
only the WX clones blew at anything less than 15v.
If you drive a low impedance speaker (4, maybe 8 ohms) at high audio volume
the chip might overheat when fed 12v.? So tune in a strong signal and twiddle the volume control
with a finger on the TDA2822, if it gets too hot to touch then turn down the volume.
Once you get a feel for that, then no worries.
There was a lot of discussion here early on about the TDA2822 blowing right when a headphone
jack was plugged in, and folks were worried about a momentary short somehow.
Far as I know, that was only an issue with the WX branded clones.
Primary reason HFSignals moved away from the TDA2822 on v4 is that they were?
having trouble finding thousands of the known good ones, no longer just throwing
the dice on all the clone TDA2822's on the market..? Those 2n3904's, they've got
reels and reels of, and will be easy to get for another 50 years.
Jerry
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On Thu, Jun 21, 2018 at 05:19 am, Walter Keen wrote:
I've got a yet to be assembled v3 with a socketed TDA2822, non WX branded?
?
Do you think there is any benefit to swapping this tda2822 out for a small board with discrete components, or are these later tda2822 chips reliable?
Lee
Raj vu2zap