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Old 15th April 2011, 12:14 AM   #111
Salas is online now Salas  Greece
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Since I haven't seen it working with stringed heaters, I can't speak from experience. Gibson had used them in parallel for one. I would prefer you don't mix stages heaters if possible for this kind of gain app.
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Old 15th April 2011, 12:27 AM   #112
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Sure - thats easy. I have some 15V transformers - which would suit ~12V heater supplies..... can use different secondaries for each, or even separate transformers. BTW, anyone looking for some - farnell still ahve some a ~€3 each!

Fran
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Old 15th April 2011, 12:33 AM   #113
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You need two envelopes, one noval, one octal, at 1/2B+ elevated heaters for covering two channels in this phono. Another two the same at no elevation. Plan clear.
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Old 16th April 2011, 12:32 PM   #114
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Valves and bases ordered today. Traffos in stock - just need to organise the parts list next....
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Old 16th April 2011, 12:45 PM   #115
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Lets see who does the first one. We have early British & Australian interest but Irish outsider late entry may steal the contest.
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Old 16th April 2011, 02:16 PM   #116
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Hah!! at the rate I'm going I really will be paddy last!

Anyway, giving back to community!!

BOM with mouser links.
PS info not included, wima caps chosen as reasonable base to start from, circuit numbered to match my own notes, prices are +vat.

Please double check!!!!


Fran
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Old 16th April 2011, 03:04 PM   #117
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Quote:
Originally Posted by woodturner-fran View Post
wima caps chosen as reasonable base to start from,

Fran
I would advise against the interstage coupling cap to be a Wima if possible. See for USSR K40Y PIO or 0.047uF K72P Teflon. Boutique PIO and Teflon no problem but can set back the budget heavily...
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Old 16th April 2011, 03:08 PM   #118
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Yes, I'd agree - i'll add a note to say that k40y will sound better....

Would you suggest the same for output cap and RIAA ones?

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Old 16th April 2011, 03:42 PM   #119
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For Riaa such caps lack in tolerance. For output I prefer 2u2 and to pre-shape the LF roll off with the interstage so it can mate many line inputs, still holding a determined rate fall. 47n to 100n interstage OK. 2u2 difficult in CCCP caps. Maybe K75-10 500B 1u//1u // FT3 0.1u. Green monstrosity with a silver accent.
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Old 16th April 2011, 06:40 PM   #120
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Yes, I've heard that before - but it might be worth buying a number and matching by hand.

Anyway, I've found a russian federation seller on ebay and will be ordering from him.....
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