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EC Zana Deux tube rolling pls share - Page 14

post #196 of 625
Quote:
Originally Posted by David Pritchard View Post
Dear Recstar,
I would say go for it if you see the Fivre tubes for the Moth. For the first time I saw a pair of 6SL7Gt Fivre tubes on E-Bay, and I pulled the trigger-$160.00 for the pair. They are on the way from Italy with original boxes. In the Zana Deux the Fivre is the best tube I have for allowing the violin string to have both musical pitch and a sense of string vibration. Fabulous. I also found a pair of Fivre 6922 tubes for the SET amp. They are not here yet.
Have you tried the Hornshoppe sub yet?
Good listening to all.
David Pritchard
I do have the hornshoppe sub - it is superb. It integrates perfectly with my horns, and the sub amp that comes with it is fantastic. Great bass quantity and quality, makes the bass sound like it is coming from the mains, I am using Ed's hi output connection and there is no performance diminished from the mains and the the blending of the 2 is seamless.

Thanks Earl for the info, appreciate it.
post #197 of 625

Zana Deux

Thank you for the information about RCA and Fivre. The history of these tube manufacturers and their products is interesting. I just finished reading The Saga Of The Vacuum Tube. This is an out of print book detailing the history of the tubes up to 1930. I think a nice book that has helped me understand tube amplification is Valve Amplifiers by Morgan Jones 3rd. edition. I found it on Amazon. Next on the reading list is Fundmentals of Vacuum tubes by Eastman( Pub 1949).
Guys be careful. Finding out of date tube books can be as fun as tube hunting. If you are in a large city or one that has a university, check out the electronics section of your used book stores.
I love the web site of the hornshoppe. Glad to hear his sub sounds so good.
Well since I "won" all 4 e-Bay auctions since NorSpoon's find of the Standard-Erickson tube, I am putting myself back on tube restriction!
Good listening to all.
David Pritchard
post #198 of 625
If anyone of to you find the Metal Base Sylvania 6SL7W you should take it. It is a rare but sometimes you see them in Ebay. You will not be disappointed in it because it is so good. I have now 16 different brand of the tube to ZD, and 6SL7W is my all time favorite all of those.

post #199 of 625

6SL7W

I have had my eye on this one but couldn't justify the price. I notice that you don't have a Brimar 6SL7 with black base and orange print. This is by far my favorite.
post #200 of 625
What do you guys think about this? :
Adapter ECC82 TO 6SN7 5751 TO 6SL7 tubes SUB - eBay (item 250333628792 end time Dec-28-08 03:52:14 PST)

Can I use this adapters with the Zana Deux? Because I have a few the 5751 tubes and it would be interesting to hear how they sound with Zana.
post #201 of 625
Quote:
Originally Posted by Sture View Post
What do you guys think about this? :
Adapter ECC82 TO 6SN7 5751 TO 6SL7 tubes SUB - eBay (item 250333628792 end time Dec-28-08 03:52:14 PST)

Can I use this adapters with the Zana Deux? Because I have a few the 5751 tubes and it would be interesting to hear how they sound with Zana.
If I read that ad correctly, it's an adapter for 5751>6sl7. Not the other way around. I haven't checked with the tube data on these tubes but check with the seller. If there's anything to those adapters other than a change in pin out, you won't be able to use them.
post #202 of 625
I was going back and checking some earlier posts and came across this;
http://www.music123.com/Groove-Tube-...source=ZWSPWXX
It may in fact be the same thing but if you want to experiment with sub-ing the 5751 for the 6sl7, you might as well get one from a well know manufacturer. Of course the 5751 has less gain than the 12ax7 but are way quieter and transparent. As a result, it may not work as well with some cans like K701 or others that are power hungry. You can compensate a little for less gain with the "Y" logo 6c33 which has higher internal dampening.
post #203 of 625
Quote:
Originally Posted by Sture View Post
What do you guys think about this? :
Adapter ECC82 TO 6SN7 5751 TO 6SL7 tubes SUB - eBay (item 250333628792 end time Dec-28-08 03:52:14 PST)

Can I use this adapters with the Zana Deux? Because I have a few the 5751 tubes and it would be interesting to hear how they sound with Zana.


Most of us Singlepower owners have been using adapters for a couple years now .... they work great. But, I would check with the builder to make sure.

Currently some of us have been experimenting with a 6SN7GT to 6F8G adapter. This tube is essentially a 6SN7GT with a plate cap.

Here is a pic of the tube in a Supra ....






Where I am going with this is while I was researching the 6F8G I discovered the 6C8G. The 6C8G is essentially a 6SL7GT with a plate cap. However, this tube while almost identical in most electrical parameters to the 6SL7GT has a noticeably lower gain/ mu of 36 .... compared to the 6SL7GTs documented gain/ mu of 70. So, you might want to ask the builder about this one too.


The 6F8G sounds as good or better than any on my 6/12SN7GTs and I suspect the 6C8G will give the better 6SL7GTs heavy competition too. As a plus, the 6C8Gs I found available were the better nos Ken rad/ RCA/ TS and NU types .... and these tubes cost a whopping $3-4 each. If the lower gain is sufficient this tube is really good. I tried them in my Supra-Extreme and even though the electrical environment was less than optimal the tube still sounded very good. In an amp made specifically to use the 6SL7GT these should be about as good as it gets.

I bought my adapters on ebay ....

Adapters 6F8G TO 6SN7 6384 TO 6L6 tubes SUB - eBay (item 250332454155 end time Dec-25-08 18:45:54 PST)


6C8G ....






Another option is to use an octal to loctal Singlepower 7N7/ 7AF7 (= 6SN7GT ) adapter with a tube called the 7F7. The 7F7 is a 6SL7GT with a loctal base.The 7F7 will work for sure as this tube is electrically identical to the 6SL7GT. 7F7s run about $6-8 per tube.




You can see the 7F7 data sheet here ....

NJ7P Tube Database Search
post #204 of 625
Quote:
Originally Posted by Sture View Post
If anyone of to you find the Metal Base Sylvania 6SL7W you should take it. It is a rare but sometimes you see them in Ebay. You will not be disappointed in it because it is so good. I have now 16 different brand of the tube to ZD, and 6SL7W is my all time favorite all of those.
I got ONE Sylvania metal-base 6SL7W for $10 recently that is in terrific condition and tests as new. Problem is - I can't really use it - I only use 6SL7's in my phono preamp, and it needs a pair. So I am stuck searching for a second...
post #205 of 625
Quote:
Originally Posted by Skylab View Post
I got ONE Sylvania metal-base 6SL7W for $10 recently that is in terrific condition and tests as new. Problem is - I can't really use it - I only use 6SL7's in my phono preamp, and it needs a pair. So I am stuck searching for a second...
Congratulations on your wonderful finding. It was a very cheap.
I paid a pair of the NIB 6SL7W so much that I did not even dare to tell you.

Hopefully you can find it, but if you don't, then you should buy the Zana Deux, and then you can use the 6SL7W. Otherwise, It is idle for the cupboard, and not get shine.
post #206 of 625
Quote:
Originally Posted by Skylab View Post
I got ONE Sylvania metal-base 6SL7W for $10 recently that is in terrific condition and tests as new. Problem is - I can't really use it - I only use 6SL7's in my phono preamp, and it needs a pair. So I am stuck searching for a second...
If you don't find a second, I'd be glad to take that one off your hands sir!

A_Sr.
post #207 of 625
Quote:
Originally Posted by Absorbine_Sr View Post
If you don't find a second, I'd be glad to take that one off your hands sir!

A_Sr.
I am trying to find another, but if I give up, I will let you know for sure
post #208 of 625
Quote:
Originally Posted by Absorbine_Sr View Post
If you don't find a second, I'd be glad to take that one off your hands sir!

A_Sr.
Ditto that! I wouldn't dream of starting a bidding war here though, so just put me second in line if the deep-heating rub passes. -Tim
post #209 of 625
Quote:
Originally Posted by nghows View Post
on the drawing block already..... at least the last time i spoke to him they were.

the man has his fingers in so many pies. each time i touch base with him, he's onto something else.

bad news for me is it appears the hi end phono stage is on the back burner... but then again, if i ask in a few weeks that might change again! I hope so!
I can wait for the phonostage. Nice to know it's on any burner at all! I am carefully planning the slow but sure replacement of all my digital gear with Eddie Current analog heaven. -Tim
post #210 of 625
Got the Isoclean fuse today. They are supposedly directional, and I am wondering which way the arrow should point. Not that I can understand how it could make any difference, but it would be nice to know anyway for the piece of mind.

David: Did you experiment with which way the fuse goes? I set the arrow from left to right (with the fuse holder upside down, as it is inserted).

It really does seem to clean things up. Need more time with it, and to swap back to the original to recheck my hearing.

I am going to order one for my DAC as well. I think I am going to try the Hifi Tuning fuse for it.

Maybe we should start a Zana Deux Fuse Rolling thread....hehe.
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