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2359glenn | studio - Page 72

post #1066 of 10149

Not just beautiful but stunning, curvy and sexy looking!

post #1067 of 10149
Thread Starter 

The RCA & Cunninghams both look sexy...got to find a way to use them.

post #1068 of 10149
Quote:
Originally Posted by Silent One View Post

 

I just learned that in the last few minutes using my Goog-fu! Got some Cunningham C345's as well. So, now I got these '45' tubes and can't use 'em. Did I mention they're beautiful? rolleyes.gif I think I saw a pair of '80' tubes in the box, too. Eventually, will see what I can use and process the rest.

The 80 is an old rectifier that was commonly used in amps using the 45 as an output stage.   EML makes a reproduction now, good tubes and if it tests good is probably worth some money.

 

I don't see how the OTL could possibly use a 45.  It's impossible for output, and for driver would require modification of the amp not just an adapter is my guess.  Even then the gain would be too low.  45 has 1/7 the gain of the 6SN7.

 

They'd certainly work in a 45 amp though.  tongue_smile.gif


Edited by Xcalibur255 - 11/19/12 at 3:24pm
post #1069 of 10149
Quote:
Originally Posted by rosgr63 View Post

I have used the following with adapters  instead of a 6SN7:

 

2C51/5670/6385/WE396A/6CC42/7062/E180CC/6CG7

 

12AV7/12AZ7 can drive the 6AS7G well.

 

ECC40

 

I need to try the 5687, sorry Glenn I haven't yet despite your request.

 

I need to retest them all with my GR OTL 6SN7/LP2/5998, but need time.


Have heard good things about the 5687 in my reading, it is suggested to be a superior driver alternative to the 6SN7 by some people.  These were tubes from the space age era, the stuff that powered NASA and military equipment before SS entered the scene.  Because the engineering came from the military sector they were way better tubes than stuff like the 12AX7 and their ilk that was on the consumer side.


Edited by Xcalibur255 - 11/19/12 at 3:21pm
post #1070 of 10149

I am currious on what does the 5687 brings to the table.

post #1071 of 10149
Quote:
Originally Posted by Silent One View Post

 

I just learned that in the last few minutes using my Goog-fu! Got some Cunningham C345's as well. So, now I got these '45' tubes and can't use 'em. Did I mention they're beautiful? rolleyes.gif I think I saw a pair of '80' tubes in the box, too. Eventually, will see what I can use and process the rest.

The 80s are the same as a 5Y3 just with a UX4 base instead of the newer octal. They could be used in a WA6 with adapter the OTL draws to much current

for the 80.  Of coarse the 45 has to be in a amp with output transformers I could make a OTL with these but it would kneed 8 of them.

.

post #1072 of 10149
Thread Starter 
Quote:
Originally Posted by Xcalibur255 View Post

Quote:
Originally Posted by Silent One View Post

 

I just learned that in the last few minutes using my Goog-fu! Got some Cunningham C345's as well. So, now I got these '45' tubes and can't use 'em. Did I mention they're beautiful? rolleyes.gif I think I saw a pair of '80' tubes in the box, too. Eventually, will see what I can use and process the rest.

The 80 is an old rectifier that was commonly used in amps using the 45 as an output stage.   EML makes a reproduction now, good tubes and if it tests good is probably worth some money.

 

I don't see how the OTL could possibly use a 45.  It's impossible for output, and for driver would require modification of the amp not just an adapter is my guess.  Even then the gain would be too low.  45 has 1/7 the gain of the 6SN7.

 

They'd certainly work in a 45 amp though.  tongue_smile.gif

 

Nothing clicked. ph34r.gif I was tired and though I had been looking at the tube, nothing clicked. It wasn't until I realized it was actually a '45' tube, I would need an output transformer or some R&D wizardry. At which point I'd just get another amp. Yes, I am following your activity with the studio. biggrin.gif I've long wanted a nice fat DHT amp...and a treasure map to find the funds for it.


Edited by Silent One - 11/19/12 at 5:00pm
post #1073 of 10149
Thread Starter 
Quote:
Originally Posted by john57 View Post

I am currious on what does the 5687 brings to the table.

 

I'm also looking forward to the reply...

popcorn.gif


Edited by Silent One - 11/19/12 at 5:01pm
post #1074 of 10149
Thread Starter 
Quote:
Originally Posted by 2359glenn View Post

Quote:
Originally Posted by Silent One View Post

 

I just learned that in the last few minutes using my Goog-fu! Got some Cunningham C345's as well. So, now I got these '45' tubes and can't use 'em. Did I mention they're beautiful? rolleyes.gif I think I saw a pair of '80' tubes in the box, too. Eventually, will see what I can use and process the rest.

The 80s are the same as a 5Y3 just with a UX4 base instead of the newer octal. They could be used in a WA6 with adapter the OTL draws to much current

for the 80.  Of coarse the 45 has to be in a amp with output transformers I could make a OTL with these but it would kneed 8 of them.

.

 

Thanks Glenn. I trust your judgement on the 9-pin 12AU7/12AT7 versus the TSBGRP. And will skip the exercise in buying an adapter only to dilly-dally around. 

post #1075 of 10149

Got them in the mail. Little teaser , they are very heavy! Click to enlarge pictures. wink.gif

 

1000

1000


Edited by Seamaster - 11/21/12 at 12:19pm
post #1076 of 10149

They look very nice!

post #1077 of 10149
Quote:
Originally Posted by Seamaster View Post

Got them in the mail. Little teaser , they are very heavy! Click to enlarge pictures. wink.gif
Warning: Spoiler! (Click to show)



Seamaster, Are those bulb testers?
post #1078 of 10149

They are the soul of my project. Transformers.

post #1079 of 10149

Seamaster

Is the bottom graph is with load and shows the powerband frequency response?

post #1080 of 10149
Quote:
Originally Posted by Seamaster View Post

They are the soul of my project. Transformers.

Big transformers! Pics during and after please!
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