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#1
03-31-2015, 07:16 PM
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Freed - Eisemann
Up on the bench is a unknown model freed-eisemann tabletop, one I picked up from Kutztown a few years ago. Seems like this was somebody's home at one time. Mr. Mouse was very busy destroying the RF coils.
Anyway, whats left from what I can tell is there was 3 coils per tube. Closest circuit I can find is a mission - bell model 407 or 411 ( riders vol 6 page 11-2 ) Tube lineup 80, 41, 75, 6d6, and 6f7. Anybody know where I can get coils that will work? 
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#2
03-31-2015, 10:01 PM
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Yee-ikes!
 Hope you're observing proper hantavirus precautions.
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#3
04-01-2015, 05:32 PM
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Quote:
Although it probably will be scrapped if I can not find coils that will work. Anyone have miller numbers 43-A, 43-RF, 5261-A, 5261-RF, or merit BC412 and 413? Any of these should work.
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#4
04-04-2015, 08:00 PM
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Turns out I found a meissner cross on these coils, and playthings of past listing shows he has them. I just shot him a email as to availability. If he has them, the chassis is heading to the cabinet blaster.
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#5
04-10-2015, 09:35 PM
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Well here it is after a strip down and a trip to the blasting cabinet. All recapped, chewed up wires replaced. Got the coils from playthings of past. Can't fire it up just yet, found a tube was in it that does not belong or subs. It takes a 6F7 and somebody has a 6A7 in it's place. Did not have one on hand, so I had to order one.
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#6
04-17-2015, 09:20 AM
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Quote:
The 6A7 is a pentagrid converter, where the 6F7 is a triode-penthode type tube. IIRC, the cathode is common to both sections of the 6F7. 
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#9
04-17-2015, 12:01 AM
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Is the one station spread across a portion of the dial? If so, the local oscillator (LO) is not running.
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#11
04-17-2015, 07:05 PM
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Check with another operating radio to see if the oscillator is working. Don't know the IF frequency of this set but if it's around 455 kc, set the good radio to around 1450 and tune the Freed Eisemann back and forth around 1000. Should hear a squeal in the good radio.
If no squeal, check the oscillator coil wiring: try reversing just one set of leads, EITHER the primary OR the secondary, of this coil. They have to be in the proper relationship to each other for oscillation to occur.
__________________
Reece Perfection is hard to reach with a screwdriver.
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#12
04-17-2015, 07:15 PM
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Since the original coil got chewed in half by mice, the only thing moyer had was a miller universal coil, which I thought I had hooked up right, but might not be. I'll try it with the other radio.
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#14
04-18-2015, 07:47 AM
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Tried the radio trick, it does squeal. This was after I realized I did not install the goat shields...duh...Still does nothing with the 6F7 in it, so at some point it must have been reworked to use the 6A7.
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#15
04-18-2015, 06:25 PM
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If it oscillates with the 6A7, it oscillates. May have been a later version of the set. Set your signal generator to 455 kc with internal mod and lay its output cable near the first IF transformer wiring. Assuming 455 or 456 is the correct IF for this set, should hear the tone in the speaker. Maybe somebody fiddled with the IF trimmers.
If the oscillator works, and the spread is from 1000 to 1455 between the two radios, then you know the IF should be 455. With that determined and working, what's keeping the oscillator signal from beating with the incoming BC signals to produce IF? Hmm...
__________________
Reece Perfection is hard to reach with a screwdriver.
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