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Old 20th October 2011, 11:07 PM   #481
Salas is offline Salas  Greece
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Quote:
Originally Posted by taniknight View Post
Salas, do I remember correctly that that you pointed out that there will be DC at the input and a blocking cap should be used in the absence of a transformer to protect the cart coil?

Edit: Yep, in post 4.
Usually innocuous, but its advised to check with a DMM on mV DC that there is no appreciable voltage on the input from a leaky valve before hooking up an MM cart straight. Although rare, it could be.
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Old 23rd October 2011, 02:28 PM   #482
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1578 tube can be used instead 6SN7? hole plate is better, why?

Last edited by merlin el mago; 23rd October 2011 at 02:32 PM.
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Old 23rd October 2011, 02:36 PM   #483
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Haven't used it ever. There was a thread: Russian 6N8S/1578
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Old 23rd October 2011, 04:17 PM   #484
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Can I buy 2 MELZ 6N8S / 6SN7 tube metal base (hole plate) for $100.00, it's a good price?
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Old 23rd October 2011, 07:16 PM   #485
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Originally Posted by merlin el mago View Post
Can I buy 2 MELZ 6N8S / 6SN7 tube metal base (hole plate) for $100.00, it's a good price?
$50 per tube - you probably wont see them any cheaper these days. Bought a bunch a few years ago for around $40 per but that was a good deal and I was patient and looked for a while. They are the best 6SN7 tubes I've heard and are at least as good as the RCA 5692 rugedized version. As good as they sound, my results varied, a few were microphonic. I stoped looking for them after 2 went microphonic. So I suspect some on the market were rejects from the factory even tho they have the OKT stamp on them. I started buying the 5692 RCAs as they are much more reliable and last virtually forever in audio and sound almost as good, very close 2nd in my gear.


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Bob
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Old 23rd October 2011, 08:16 PM   #486
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On ebay a couple starting from $100 to $174 all metal base but not hole plate, I see a couple very interesting but a little expensive circa $140 but measurement is very good

Thanks,
Felipe
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Old 23rd October 2011, 09:22 PM   #487
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Maybe don't get too caught up in the tube rolling yet - save it for later after you have it up and running and when you're finished with caps etc....

The $100 will bu a lot of the rest of the parts...
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Old 23rd October 2011, 10:28 PM   #488
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Quote:
Originally Posted by merlin el mago View Post
On ebay a couple starting from $100 to $174 all metal base but not hole plate, I see a couple very interesting but a little expensive circa $140 but measurement is very good

Thanks,
Felipe
Pass on them - THE only 6N8S worthy of that price are the round hole versions.

Cheers,
Bob

Last edited by bobrown14; 23rd October 2011 at 10:30 PM.
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Old 24th October 2011, 12:13 PM   #489
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Originally Posted by woodturner-fran View Post
Maybe don't get too caught up in the tube rolling yet - save it for later after you have it up and running and when you're finished with caps etc....

The $100 will bu a lot of the rest of the parts...
Quote:
Originally Posted by bobrown14 View Post
Pass on them - THE only 6N8S worthy of that price are the round hole versions.

Cheers,
Bob
Hey guys,

Thank you very much for your good advices.

Felipe
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Old 25th October 2011, 11:27 AM   #490
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Default Partridge 977

Just arrived the couple of partridge 977 for the Itch could you help me to wire up, there is 1 red pin, 1 yellow pin & 2 green pins connected, attached pic:
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