Tube adapters??

mikek200 · 17653

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Offline mikek200

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on: April 13, 2013, 05:59:06 AM
I bought a few 6sn7 tubes,for my crack.

Can anyone tell me,if,using a 6sn7 to 12au7 adapter,will degrade SQ?

Thanks
Mike


Offline johnsonad

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Reply #1 on: April 13, 2013, 06:11:00 AM
Nope, it's a mechanical connection either way. An adapter saved you from rebuilding the kit.

Aaron Johnson

Offline mikek200

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Reply #2 on: April 13, 2013, 07:13:03 AM
Thank you ,Sir,I went ahead and ordered a few 6sn7's ,before checking---daaa.

Raytheon 6sn7 WGT
Sylvania top getter 6sn7GT
And have my eye on an old RCA  5692  Red Base


Offline ualcap

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Reply #3 on: April 19, 2013, 11:24:14 AM
Where is the bet place to get one of those tube adapters?


Offline Tubejack

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Reply #4 on: April 20, 2013, 02:31:33 AM

There are 10 types of people in this world,
Those that understand Binary and those that Don't!

Offline mikek200

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Reply #5 on: April 20, 2013, 04:03:29 AM
Excellent link,TJ

Thanks
Mike


Offline ualcap

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Reply #6 on: April 20, 2013, 04:30:09 AM
TJ,

Saw those on Ebay the other day i was hoping to find some one on the forum that has used them. Do they work ?

Thanks
Danny


Offline mikek200

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Reply #7 on: April 20, 2013, 01:40:01 PM
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


Offline Lar

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Reply #8 on: April 20, 2013, 02:16:49 PM
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

Larry V

Offline mikek200

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Reply #9 on: April 20, 2013, 02:26:16 PM
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


Offline Lar

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Reply #10 on: April 20, 2013, 04:54:40 PM
I`m using the Electro-Harmonix 6SN7 with very good results. No worries.   :)

Larry V

Offline Tubejack

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Reply #11 on: April 21, 2013, 02:51:55 AM
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. 

There are 10 types of people in this world,
Those that understand Binary and those that Don't!

Offline mikek200

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Reply #12 on: April 21, 2013, 07:25:33 AM
  What are "octals"?

Do you feel that the 6sn7 tubes,give a  better,cleaner sq, than the 12au7's

Which of the 6sn7's are your favorites??

Tnx
Mike


Offline Tubejack

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Reply #13 on: April 21, 2013, 08:24:26 AM
"Octal" is a generic term for the 8-pin base on many types of tubes, such as the 6SN7. 

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fangela.com%2Fimages%2Fproducts%2Fdetail%2F310249166957.jpg&hash=629415303be63a88d0897e6e5f2e0ea4a6d6a456)

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 ....

There are 10 types of people in this world,
Those that understand Binary and those that Don't!

Offline Natural Sound

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Reply #14 on: April 21, 2013, 09:25:33 AM
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.  :)


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