Sorry that you got the bad one. If you have an LM386 lying around, you can use it as an outboard audio amp. Feed the audio into the LM386 from the volume control's middle and ground lug. If you have some NPN or PNP transistors lying around, you can throw a quick but very cool audio amplifier together as show here? (you just? build theQ16,? Q17,Q18 circuit).
HF signals can ship you a replacement chip anyway, if you'd like that.
What happened was that they stopped manufacturing the TDA2822. As the market dried up, our suppliers picked up these WX chips without us noticing them. We shipped with these. Some two hundred boards must have gone out with these chips. Many survived, many didn't. We stopped shipment for a while to get other sources that still had some stock of good ones left, tested them and used them. The new boards have a socket to replace it anyway.
Starting this month, the? boards will ship with a minor revision of the PCB. We are using an audio amplifier built with discrete transistors. In hindsight, we should have done this right in the begining.
