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JBL 4311B/1978
this has been chez sedon for a couple years; it was adwertized as not working when i got it - signal strength meter tube bad. i finally decided to try to trouble shoot it; the 6g-e12 signal strength meter tubes are rare as hen's teeth, and i had no luck finding another one for less than a few times what i paid for the complete tuna. i wariac'd it slowly last night, and gave it a go today; it turns out that everything is fine. one of the tube socket connections was shorting out against another chassis connection. w/everything cleaned, lubed, and the socket connector moved away from the chassis, everything works and sounds fine, including the signal strength meter tube. it sounds good; further ewaluation will be forthcoming after it runs in a few days.doug s.
i think that's the model that my dad had circa 1957, and I got it when I was about 16 (1967). Fond memories! EDIT: Wrong model. His was mono with a multiplex output.
Micro Seiki BL-91
it could be the right model - this one is also mono w/a mpx out. it says "stereophonic", cuz you can operate am on one channel and fm on the other. (notice the "selector" switch.) some stations did this in the early days of stereo - broadcasting one channel on am & the other on fm, before fm stereo. you'd be surprised how many wintage tubed tunas are like this - they say "stereo" but they are not really, w/today's broadcasts - you need a mpx decoder.it's been up & running 24/7 now for a little over a week, and it is sounding mitey-fine, thru a relatively modern studio-12 fm mpx decoder...
You the man, Douglas.