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Old 8th January 2013, 04:54 PM   #1091
Salas is offline Salas  Greece
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They brought more sound stage focus being well matched?
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Old 8th January 2013, 05:08 PM   #1092
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Yes, also more harmonics, less harsh, a lot of less noise, simply is other phono: the best phono preamp I had listened (for the moment at least), I also ordered these tubes GENUINE NOS 1578 MELZ tube (6N8S, 6H8C, 6SN7) metal base hole plate :

One or more GENUINE NOS 1578 MELZ tube (6N8S, 6H8C, 6SN7) metal base hole plate | eBay

Have the power to ear a lot of more details: guitar, piano, voices, is really other level, is pure emotion and heart, vocal jazz is like you are there when Ella is singing, I don't have words to express all the big upgrade done with these tubes, surely when I refurbish mine Jadis JA80 I will substitute the 12AX7 for these incredible tubes.

If the change it's so big when change the resistors & when I receive the 1578 really I will have the best phono in the world, thanks Salas.

Last edited by merlin el mago; 8th January 2013 at 05:17 PM.
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Old 8th January 2013, 05:17 PM   #1093
Salas is offline Salas  Greece
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Those MELZ are top quality 6SN7s.
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Old 8th January 2013, 05:20 PM   #1094
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Yes I know, I bought two tubes super matched pair, now I have in the preamp one metal base 6H8C/6N8S without hole plate & one metal base 6H8C/6N8S with hole plate, that's was also a big improvement vs 6H8C/6N8S Foton.
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Old 26th January 2013, 03:25 PM   #1095
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What's the correct bias in mA?

Across R9 560R?
Across R10 33K or R11 560R?

Last edited by merlin el mago; 26th January 2013 at 03:43 PM.
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Old 26th January 2013, 04:31 PM   #1096
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I mind is R9 & R10?
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Old 26th January 2013, 04:45 PM   #1097
Salas is offline Salas  Greece
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Around 3.5mA should be running through them.
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Old 26th January 2013, 04:49 PM   #1098
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Thanks, for R9 can I use one green LED 2V?

Last edited by merlin el mago; 26th January 2013 at 04:52 PM.
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Old 26th January 2013, 05:06 PM   #1099
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Its not necessary. Only if you want to test it for fun.
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Old 26th January 2013, 05:08 PM   #1100
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I do it in other tube preamp & like it.
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