Re: A Yorek YK-901 portable to EXT ANT's! IC's?

There are only 2 IC's in this, but I have not been able to ID them. The center 1/2" SMT square IC is what I would assume to be the CPU / DSP. The other, 24 leg SMT IC, appears to be de-MOD and audio. FREQ width on AM? It's got to be wider than 10kHz. I say that since listening to both my Part #15 AM stations, which both run 10kHz MAX audio and sound more like mono FM on a wide-band receiver, you still hear the nice high audio FREQ's in there. It's about 1/2 the audio high response that you's get running like a GE Super Radio III in AM Wide. So a rough guess-timate, I can clearly hear 8kHz audio in AM on this portable. I haven't had the time to kick the RF GEN on and step-run the EXT Audio to that, yet. But, to better answer your question, if you have two AM stations just 5kHz apart, expect to hear both stations battle for dominance. Another modification that I want to try is to liberate the Push-Button tuning with one of those increment FWR / REV rotating switches, to replace those tedious < > tuning M-O-M buttons. Again, the big seller to me was the SW FREQ range of 3MHz - 21.850MHz continuous. Yeah... Doing the band step helps and dumping a 1MHz step in each Programmed Memory helps a lot too, but I just hate push-button tuning, especially that span of FREQ's.