[Jeffhs]

Bob, jr_tech, et al.:

Thanks for the replies.

First, the TO-3000-1 is all solid state and has no vacuum tubes, so there is no possibility of having a tube in an incorrect socket.

Second, I do not have a signal generator or any kind of test equipment here other than a DMM (I gave up my workshop nearly 14 years ago when I moved to this apartment), so there is no way I can test the radio's AVC system.

Third, I did try rotating the radio to null out the local station, but the signal is just too strong, even at night when it cuts its power to 500 watts (as I mentioned, I live only about two miles from the station's towers). The station does not sign off at night, even on Sunday nights for maintenance as many radio stations used to do years ago, so the frequency is always occupied. Because of this, I cannot tell if my problem disappears if there is no signal (or only very weak distant signals) on the station's carrier frequency (1460 kHz). I can sometimes hear weak signals from other stations when the station is only transmitting a carrier (no audio), such as at the top of every hour just before it airs a national newscast.

One thing I did not mention in my previous post is that none of my other radios have this problem, only the T/O. I did have a problem with my Zenith C845 and weak/garbled reception on the local station, but I corrected it by resoldering an open connection on the AM antenna loop. That radio and every other set I own now work excellently on AM and FM. I also have a Zenith H511-Y AM-only 5-tube radio that works, but not very well (it gets the local station and a couple of Cleveland stations during the day, though I did hear Chicago talk station WLS-AM at dusk one evening a couple of years ago); however, it seems to work better at night after dark, when the AM band opens up for DX--I hear stations all up and down the East Coast and in the Great Lakes region at night on this radio. The speaker is shot (cone is torn up beyond repair, although it works well enough for talk radio); however, at this time I'm not concerned about restoring that set. It has at least one other issue (broken dial cord) that doesn't affect its operation, so I'm not concerned about that either.