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Alpine Electrocats

FS: Marshall Leach pre pre amp

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Item: battery powered phono stage it step up transformer
Location: Canberra
Price: $70
Item Condition:good / fair
Reason for selling:not needed
Payment Method: Pickup - Cash, Paypal, COD Only
Extra Info:

I bought this years ago and never used. I thought it was a phono stage but it might be a step up Transformer. 
it could do with a cleanup and tweak. 

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Edited by Alpine Electrocats

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This was a moving coil amplifier to boost the signal level to moving magnet levels. It was very quiet and required matched transistors to build. The 9v battery per channel idea & paralleled emitter input was ahead of its time to keep noise low. 
Marshall Leach was like Nelson Pass in that he liked to share his ideas with the audio community. Originally published this circuit in mid 1970s in Audio magazine. At that time this was the best option for moving coil. 


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