Tube adapters??
- Thread starter mikek200
- Start date
I am expecting delivery,of this adapter ,next week..
http://www.ebay.com/itm/220742043198?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
From what I've read-they do work..maybe a more learned member can chime id here,and give you a more detailed answer.
After I get it ,and test it for a few days,I'll post back with my impressions.
For,the money,it seems like a good option???
Mike
http://www.ebay.com/itm/220742043198?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
From what I've read-they do work..maybe a more learned member can chime id here,and give you a more detailed answer.
After I get it ,and test it for a few days,I'll post back with my impressions.
For,the money,it seems like a good option???
Mike
The 6SN7 tubes sound very good in the Crack.
But from looking at that adapter you purchased, looks like its the wrong one, or else i`m just not seeing clearly.
You need a 9 pin male going to a 8 pin female, like this one.
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=320659633166&ssPageName=STRK:MEWAX:IT#ht_1080wt_793
But from looking at that adapter you purchased, looks like its the wrong one, or else i`m just not seeing clearly.
You need a 9 pin male going to a 8 pin female, like this one.
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=320659633166&ssPageName=STRK:MEWAX:IT#ht_1080wt_793
Larry,yes,I did order the wrong adapter
I contacted the seller,& he is giving me a refund.
SORRY,SHOULD HAVE CLARIFIED THIS BEFORE...
I did however,order the correct adapter...like the one you linked..& it should be here next week
Can I ask,which 6sn7 tube your using in the crack,which do you prefer?
I ordered a few,on ebay,and was shocked with the low prices..nice surprise after owning literally dozens of tubes with my Lyr
Sorry,again ,on the misinformation about the adapter
Mike
I contacted the seller,& he is giving me a refund.
SORRY,SHOULD HAVE CLARIFIED THIS BEFORE...
I did however,order the correct adapter...like the one you linked..& it should be here next week
Can I ask,which 6sn7 tube your using in the crack,which do you prefer?
I ordered a few,on ebay,and was shocked with the low prices..nice surprise after owning literally dozens of tubes with my Lyr
Sorry,again ,on the misinformation about the adapter
Mike
Tubejack
New member
I use a 6SN7 adapter in my Crack and have rolled several different brands and productions. The adapter works just fine, and it really opens up the different types of tubes you can try as a driver. They are inexpensive enough to give octal's a try, w/o having to make semi permanent modifications to the Crack just to experiment.
Tubejack
New member
"Octal" is a generic term for the 8-pin base on many types of tubes, such as the 6SN7.
I was lucky enough to find 2 pair of these for $50 a few years ago; my current favorite in the Crack, as compared to the 12AU7's and equivalent 9-pins I have tried ....
http://www.ebay.com/itm/RCA-Black-Plate-Red-Base-5692-Audio-Tube-High-End-6SN7-6SN7GT-PAIR-2-/140957889014?pt=Vintage_Electronics_R2&hash=item20d1beb1f6 (Submitted only as an example of the tube I currently use, not affiliated with this listed seller. You will find dozens of different brands/types 6SN7's on the market.) I have also tried black base RCA 5692 and and Sylvania JAN 6SN7, GE 6SN7GTB, with good results.
But by all means I certainly have not tried them all .....http://www.ebay.com/sch/i.html?_trksid=p2047675.m570.l1311.R1.TR11.TRC1&_nkw=6sn7+tube&_sacat=0&_from=R40
YRMV, it's all personal to your ears ....
I was lucky enough to find 2 pair of these for $50 a few years ago; my current favorite in the Crack, as compared to the 12AU7's and equivalent 9-pins I have tried ....
http://www.ebay.com/itm/RCA-Black-Plate-Red-Base-5692-Audio-Tube-High-End-6SN7-6SN7GT-PAIR-2-/140957889014?pt=Vintage_Electronics_R2&hash=item20d1beb1f6 (Submitted only as an example of the tube I currently use, not affiliated with this listed seller. You will find dozens of different brands/types 6SN7's on the market.) I have also tried black base RCA 5692 and and Sylvania JAN 6SN7, GE 6SN7GTB, with good results.
But by all means I certainly have not tried them all .....http://www.ebay.com/sch/i.html?_trksid=p2047675.m570.l1311.R1.TR11.TRC1&_nkw=6sn7+tube&_sacat=0&_from=R40
YRMV, it's all personal to your ears ....
Natural Sound
New member
I installed a second octal socket and wired up my crack amp for a 6SN7 right out of the box. You can see it here.
http://www.bottlehead.com/smf/index.php/topic,1222.0.html
And see some comments I made here.
http://www.bottlehead.com/smf/index.php/topic,3415.15.html
I really liked the sound but started to wonder if I was mising out on anything "magical" that the 12AU7 might have to offer.So I ordered up a set of adapters from the Lowther club in HK.
http://lowther.com.hk/ (scroll down to the bottom)
I rolled a lot of 12AU7 and 6SN7 tubes and always kept coming back to an RCA 6SN7 and a "Conn Organ" 6SN7 tube that I believe was made by Sylvania. The funny thing is that these happen to be some of the cheapest 6SN7's in my inventory.
http://www.bottlehead.com/smf/index.php/topic,1222.0.html
And see some comments I made here.
http://www.bottlehead.com/smf/index.php/topic,3415.15.html
I really liked the sound but started to wonder if I was mising out on anything "magical" that the 12AU7 might have to offer.So I ordered up a set of adapters from the Lowther club in HK.
http://lowther.com.hk/ (scroll down to the bottom)
I rolled a lot of 12AU7 and 6SN7 tubes and always kept coming back to an RCA 6SN7 and a "Conn Organ" 6SN7 tube that I believe was made by Sylvania. The funny thing is that these happen to be some of the cheapest 6SN7's in my inventory.
Ah,OK Tubejack
Thanks for that clarification
I'm a little new to crack & the tubes,that can & cannot be used.?
Basically,what I'm trying to find out is...does the 6sn7,produce better quality sound,with all things being equal ,vs. the 12au7
My thinking,correct me ,if I'm wrong,or,coming from left field,is,that, due to the bigger physical size,the 6sn7 should produce bigger,better SQ????
Also,most of my 6sn7's,that I've purchased,are all made in the 50,60's..& jan labelled
Weren't the tubes ,made in that era..better quality,better sound? low noise??
With that being said,yesterday,I got delivery of another tube ,a Siemens 12au7 ecc82 triplemica ,,,the quality of sound with my HD800's & Crack, ,and tung-sol 5998 ,was so outstanding,_ I listened to it for almost 12 hours nonstop
Natural sound,
Great pics......the original tube that came with my crack,was from a "Conn" organ
Thanks for those links.
Any other input/advice ,will be greatly appreciated
Mike
Thanks for that clarification
I'm a little new to crack & the tubes,that can & cannot be used.?
Basically,what I'm trying to find out is...does the 6sn7,produce better quality sound,with all things being equal ,vs. the 12au7
My thinking,correct me ,if I'm wrong,or,coming from left field,is,that, due to the bigger physical size,the 6sn7 should produce bigger,better SQ????
Also,most of my 6sn7's,that I've purchased,are all made in the 50,60's..& jan labelled
Weren't the tubes ,made in that era..better quality,better sound? low noise??
With that being said,yesterday,I got delivery of another tube ,a Siemens 12au7 ecc82 triplemica ,,,the quality of sound with my HD800's & Crack, ,and tung-sol 5998 ,was so outstanding,_ I listened to it for almost 12 hours nonstop
Natural sound,
Great pics......the original tube that came with my crack,was from a "Conn" organ
Thanks for those links.
Any other input/advice ,will be greatly appreciated
Mike
mikek200 said:
This is kind of a gnarly misconception.
The primary difference between a 6SN7 and 12AU7 would be ten years of technological evolution (6SN7 evolving into the 12AU7). If you go backwards from the 6SN7, you'll find the single bottle 6J5, then the 76, 37, etc.
One way to judge the impact of physical size is to look at how much heat one of the plates can dissipate. A 12AU7 can burn off 2.75 Watts, while earlier 6SN7's are rated to 2.5 watts (the GTB/A can do more).
It's also worth noting that the overall geometry differences between the 6SN7 and 12AU7 lead the SN7 to have more stray capacitances, which may contribute to some of the observed sonic differences.
IMO, the very best of the 12AU7 family edge out the 6SN7, but an average 6SN7 will sound a little better to me than an average 12AU7.
-PB
"IMO, the very best of the 12AU7 family edge out the 6SN7, but an average 6SN7 will sound a little better to me than an average 12AU7"
PB,thanks for your reply..
So,basically,size does not matter..
Key word here,might be ..edge out,.
I was guessing as much,& I'm assuming the very best of the 12au7's,might even be price prohibitive?...Lorenze, {if you can find one ?},matched & balanced Siemens tubes?
Dollar for dollar,the 6sn7,might be the way to go?
M
PB,thanks for your reply..
So,basically,size does not matter..
Key word here,might be ..edge out,.
I was guessing as much,& I'm assuming the very best of the 12au7's,might even be price prohibitive?...Lorenze, {if you can find one ?},matched & balanced Siemens tubes?
Dollar for dollar,the 6sn7,might be the way to go?
M
Eh, the prices that tubes command can be circumvented to a large degree by buying used tubes with unusual labeling. I see a few Mullard 12AU7's with non-Mullard printing on eBay for $15, that's a nice place to start.
When you move into Siemens, Telefunken, Amperex, and Mullard type 12AU7's, then the 6SN7's that can keep up become a bit more scarce.
When you move into Siemens, Telefunken, Amperex, and Mullard type 12AU7's, then the 6SN7's that can keep up become a bit more scarce.
Paul,
Thanks for your suggestion
I went on e-bay,& found a few tubes {12au7 }, that I might be interested in,.Amperexes Mullards,Brimar
These have odd labeling,but seem to be authentic..such as--Mullards ,made in India,and one or two others
Prices were low,& the readings were good-to like new...
Still waiting on my 6sn7 to 12au7 adapter..coming from China.
Thanks for your suggestion
I went on e-bay,& found a few tubes {12au7 }, that I might be interested in,.Amperexes Mullards,Brimar
These have odd labeling,but seem to be authentic..such as--Mullards ,made in India,and one or two others
Prices were low,& the readings were good-to like new...
Still waiting on my 6sn7 to 12au7 adapter..coming from China.
