[Jukebox-list] AMI R145 Amp Modification

[WHITE, JAMES P]

Hi Karl,
I too wonder what kind of sound this will result in.  I'm hoping for
just a good quality momo sound - with lots of volume of course!

Going from a stereo signal to a mono amp is not one of my concerns -
only because I have had some success with this.  The last machine I
restored was a Seeburg 222 which had a stereo cartridge but a HFMA-2
mono amp.  I wired the tone arm cable as recommended by one of our list
members and it sounded fine.  I could be missing something here however.


I see the bigger challenges as:
1) Finding the right spot in the amp to inject the 300 mV signal.  (I
need to jump past the first couple stages of amplification and try to
avoid the RIAA(?) equalization circuit)
 
2) Inducing Hum with all this extra input cable.

3) What happens in the amp when the signal path is switched to the new
line level signal?  Will the voltages go wild?  

I have the cap kit and hope to start rebuilding the amp tonight.  I'm
slow so this will take a while.  

JP
_____________________________________________________________________


JP,
Wow......MP3's through a mono G amp? I'm not the resident expert here by
a 
long shot but I can't imagine that sounding anywhere near what I'm
guessing 
your intentions are ( lots of cool music coming out of an old restored 
jukebox despite the small selection of records in it).

Karl
Columbus Coin-Op Shop
2061 S. Lumpkin Rd.
Columbus, GA 31903
(706)507-2963