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In Reply to: RE: Marantz 10B posted by Tube Hertz on April 28, 2008 at 19:11:53
Hello, Tube Hertz:
That is exactly the version of the 10-B that I own and prize the most.
Rare it is, particularly complete with a factory rack mount panel.
Anyway, the IFs on the tuner were adjusted and sealed at the factory.
Theoretically, the only thing that gets adjusted during servicing might be an adjustment to "top off" the Butterworth filters.
That is what I was told long ago.
It might also surprise you to hear that there was apparently no officially published set of service instructions for this tuner, aside from some factory bulletins concerning replacement of the LDRs, restringing the dial pointer, etc.
I own a set of crudely drawn "instructions" regarding alignment, etc., but they look like hieroglyphics to me and to some technicians, to whom I have shown them.
This does not mean that the capacitors in the unit should not be changed after over forty plus years and if this involves caps near or around any of those IFs, they will need to be adjusted, methinks.
Aside from LDR failures and the weird phenomenon many owners experience at one time or another of "spontaneous loss of detection", they do sound great, just as long as something great is being broadcast, which these days is sadly sort of uncommon, I'm afraid.
I own three of these tuners, but my "treasure" is the rack-mounted one in the living room.
Richard Links
Berkeley, CA
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