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Old 31st January 2002, 06:08 PM   #11
phil is offline phil
diyAudio Member
Join Date: May 2001
Hi Bernhard
Thanks for your reply. Yes I can that the ecc81 is not a favourite so I will use perhaps your suggestion. What type of transformer is it?
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Old 5th February 2002, 06:59 AM   #12
dice45 is offline dice45  Germany
diyAudio Member
Join Date: Jan 2002
Location: Munich, Bavaria

the preamp i am currently using is a borrowed one, but as i know meanwhile, it is on AudioNote level or better; my friend Manfred lend it to me until my own differential PP preamp gets ready. So i had to ask him for specifics.

Manfred's preamp has an input selsector and a 50kOhm ladder attenuator at the input. From that the 5687's grid is fed. The tube runs at 25 mA quiescent current. The used trannie is a Simon Shilton / SJS model PA102; it has a turns ratio of 5:1 and an impedance ratio of 15kOhm to 600 Ohm.

Warning, the trannie is slightly uncheap, but AFA i can tell, it is worth it.

At the moment, SJS has one pair of them on sale for UK-Pounds 85 a piece with chrome-plated shrouds. The normal retail price is at UKP 115, TMK. Recently, a British line preamp was reviewed in a German high-end audio magazine, Manfred reported, and the unit had a retail price of about US$ 9000.

With this simple structure, you are launched directly to orbit

Run and order as long as the sale trannies are available.
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