Jump to content

For you tube cheapskates out there. Excellent Conn organ 12AU7s


jimjimbo

Recommended Posts

I am almost out of the RCA cleartops offered earlier (3 pairs left at $29/pair shipped), however, I do have 15 pairs of Conn organ marked (Sylvania) green label 12AU7 tubes available.  These were specially selected by the manufacturers for low noise and microphonics, and they sound great.  They are a bit dusty and I have cleaned them up as best I can without trashing the labels.

 

Long grey plates, copper rod supports, chrome top, and top getter.  Pins are clean and straight.

 

All have been tested on my calibrated TV-7 tester and I have put together very closely matched pairs.  All pairs test at NOS levels.

 

Only $19 per pair, shipped to your door in the US.  I usually ship next day.

 

Please PM me with interest.

Link to comment
Share on other sites

No, not bad questions at all.  Several factors come into play, so it's hard to answer exactly.  Not necessarily in order or all inclusive.....

 

1.  Type of tube, ex. Power (6L6, 6550, etc.) small signal (12AX7, 12AU7, etc), rectifier (5U4, 5Y3, etc).

2.  How hard they are driven

3.  Number of on/off cycles

4.  Type of circuit

5.  Ambient temperature  within and around the amp

6.  Manufacturer and construction

 

Perhaps @tube fanatic and/or others could add to this.

Link to comment
Share on other sites

  • 3 months later...
  • 4 months later...
  • 1 month later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...