John Blake wrote in message
ups.com...
I have replaced the record player deck in an old radiogram, which had
a mono crystal cartridge, with a BSR deck with an SC12H ceramic
cartridge. I have used a simple resistive network to combine the two
channels but think I need an active interface as the sound is very
weak and there's a fair amount of hum.

Could anyone point me towards a web site or book or other source of a
suitable circuit please?


I've dozens of these NOS , mono,
Sonotone cardridge + stylus LP/S & ASS LP
http://www.diversed.fsnet.co.uk/sonotone.jpg
my email address off the URL below

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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/