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In Reply to: RE: BATTERY POWERED FM TUNER? posted by Ugly on July 24, 2009 at 23:36:14
Thanks Ugly.
I don't really need any more selectivity or sensitivity, just curious on how the sound quality (sound stage, imaging, tonality etc) will be affected.
The reason for this is that I heard on the grape vine that there was once a battery operated McIntosh MR78 that was made(or modified for battery use) but never went in to production as a battery powered tuner.
It's sound was truly amazing apparently.
Anyone know more about this beast?
Anyone?????..................
There was a project of Richard Modeferri (sp?) who developed the RIMO filter used in the MR77 and MR78 and worked on them. I think it was based on a MR78 as I remember a discussion in an interview he did about his time at Mc. He is a consultant at Audio Classics so you can try him there.
I'd think it would be an interesting project but using most of the later tuners probably would yield only something equal to an average analog from the golden age of SS tuners. So you'd need to go to that period to really get a reasonable return I'd surmise.
Thanks Brian.
I'm about to run a S.S. intergrated amp with batteries (cheap 6v lantern style - 12 of them)after hearing what happened when I ran the amp on +/- 12v sealed lead acids (1/4 of the voltage required).
Cellist Yo Yo Ma was in the friggin room with me....I swear!.....the result was downright scary!
As I listen to a lot of FM,I have a small old tuner that's easy to modify/hot rod on a 12v supply. So I thought .....why not?
Well, I managed to get a chip amp (Gainclone) up and running on battery supply. Details are on the AMP/PREAMP FORUM.
As the results were so damned spectacular, the battery tuner is going ahead as planned.
The tuner I have in mind will be easy to convert, but I am concerned about it's quality as it is part of a cheap compact record player/receiver unit made in China. As is, the sound is not shockingly bad.....quite the opposite in fact when connected to a decent pair of efficient speakers. If the amp is bypassed at the tuner signal is tapped at the line level point, it may be worth a look?
The other tuner I have is a digital Sansui, nothing special, but good sounding also.Problem is the power supply has multiple voltages in two places (dc and a couple of a.c.? points) so it's a lot harder to try on battery power, especially without a schematic.
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