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In Reply to: Panasonic Table Radio Problem posted by Andy Traxel on August 13, 2006 at 16:31:08:
If you had grown up during the time when such dials were the norm, you would know that such a very minor discrepency was nothing to be concerned about; many had much worse dial error right out of the box. If it works fine otherwise, leave well enough alone lest you make it much worse in performance; listen to the radio & look at the TV instead.
Follow Ups:
Ron,I'm 49. That's old enough to remember B&W TV as well as analog tuners.
The difference with the AM tuner is 300 kHz. I have to twist the pointer up to 920 kHz to find the 620 kHz station in town. I could live with that, but I wouldn't call it minor. And it would throw anybody else trying to use the radio for a loop.
Since the pointer is pretty much spot-on when switched over to FM, I'm wondering if there's some adjustment to the tuner circuit that could bring the AM frequnecy and the pointer closer together.
I'd still be hesitant to turning the IF slugs; there ought to be trimmer capacitor screws alongside the main tuning variable condensor (the closely-spaced metal fins rotated when dial moves), these screws will bear a metal strip against a mica or plastic film separating strip from main frame- note exact position prior to adjustment so that you may return if neccessary. Usually the FM & AM sections share the same basic tuning condensor BUT the FM portions will have far fewer fins & wider spaced while the AM portions will have many fins closely spaced. SO, trial turn only those trimer screws that are adjacent to AM fin sections. Your own body capacitance thru tool may affect adjustment zero so several small trial changes may be needed. With miniture plasic-encased variable tuning capacitors, the trimmer screws are located on the package rear & only require one full turn either direction for a complete adjustment range.
Thanks for the info.The tuning condenser is unenclosed.
Is adjusting the trimmer screws something that's personally safe to do with the radio on (electrocution)? Or should I adjust, turn the radio on to see what progress I've made, turn it off & try again?
Andy
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