Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › 2359glenn | studio
New Posts  All Forums:Forum Nav:

2359glenn | studio - Page 71

post #1051 of 10384
Quote:
Originally Posted by rosgr63 View Post

 

Glenn please don't!

 

You don't want me to get another tube addiction do you?

 

Seamaster well done, now you've seen the light.

Spending on a tester is the best tube money one ever spends.

 

The B&K 747 is a great tester, the short and leakages tests one of the best at 100Mohm.

However they test a 6SN7 at 19mA instead of 9mA so your results will be lower.

That means a good 6SN7 on the B&K is better than what you read.

 

Make sure it's been rebuilt/checked/calibrated.

OK I won't send the adapters you would get a addiction to $300.00 tubes?  OK I will just bring them in the summer.

Have you tried the LP2 tubes yet?

post #1052 of 10384

Now you are talking, you have made me very happy tonight, really looking forward to it!

And don't forget your tester too.

 

I have tried the LP2.

They are microphonic but they sound very nice and detailed they have qualities similar to some 6SL7 I tried but better.

 

The base is strong the mids and highs excellent.
 
They are nice to have and try from time to time.
 
I am a tube addict these BL63 look good but can my transformer cope with 1.3A? 
 
 
post #1053 of 10384
Quote:
Originally Posted by rosgr63 View Post

Now you are talking, you have made me very happy tonight, really looking forward to it!

And don't forget your tester too.

 

I have tried the LP2.

They are microphonic but they sound very nice and detailed they have qualities similar to some 6SL7 I tried but better.

 

The base is strong the mids and highs excellent.
 
They are nice to have and try from time to time.
 
I am a tube addict these BL63 look good but can my transformer cope with 1.3A? 
 
 

Your amp has that small filament isolation transformer for the LP2 and 12 volt boost for the 12SN7 that it will be pushing but it should be OK. Because it's output is 12.6 volts at one amp so at 6.3 I am sure it can handle a little more. Every one else that has one of these

amps has no problem with the BL63 they have 5 amps reserve on the 6.3 volts

 I'm sure you kneed more tubes to try!!

post #1054 of 10384
Thread Starter 
Quote:
Originally Posted by longbowbbs View Post

Quote:
Originally Posted by Silent One View Post
 

Christmas came early the the Silent One!

 

I'm kicking myself for not buying a tube tester. Had the chance and let it off the hook!

post #1055 of 10384

If you have some 6SN7s in that batch of tubes just put them in the amp. The best test is see how they sound. There is

really nothing the 6SN7 can do to the amp. The 6AS7  you might want to test them for shorts though. other then shorts

most readings from a tube tester are meaningless. Unless you bought expensive tubes that supposed to have matched sections

you can test that you are getting your money's worth.

post #1056 of 10384
Thread Starter 
Quote:
Originally Posted by 2359glenn View Post

If you have some 6SN7s in that batch of tubes just put them in the amp. The best test is see how they sound. There is

really nothing the 6SN7 can do to the amp. The 6AS7  you might want to test them for shorts though. other then shorts

most readings from a tube tester are meaningless. Unless you bought expensive tubes that supposed to have matched sections

you can test that you are getting your money's worth.

 

After further review, I can't use any of these tubes. At least not as is - an adapter perhaps, for one or two among the stash. There's certainly about two dozen worth selling, especially the Mullards. The rest I'll just gift and forget. Got a few really old rectifiers that look neat, and may keep just to be having things. 

 

I did find a 1948 pair of round cylinder black glass GE 6V6GT's. Need to look up what they'd go in. Previous owner labeled a pair or two of '45s' that didn't make the cut. Will eventually clean 'em all up and shoot pix of the ones I an't never seen before.

 

I did find a couple of manuals - RCA Receiving Tubes for AM, FM & Television (1950c) and RCA Victor Radio Tubes (1940c). Interesting stuff inside them...


Edited by Silent One - 11/18/12 at 6:02pm
post #1057 of 10384

You can get a adapter to use a 12AU7 in the 6SN7 socket or a 6CG7/6FQ7 but you might be better off selling them and use the money to buy a real 6SN7 or

one of it's variants. Better sounding then those 9 pin tubes. and you are not going to have one that beats your TSBGRP 6SN7s

post #1058 of 10384

I have used Mullard CV4003, and Mazda shield 6CG7 and Amperex 6CG7 with adapters in place of 6SN7. 12au7 type sound drier than others. 6CG7s sounded cooler and faster, but better extension on both end, especially bass present. 6F8G is better balanced in place of 6SN7.

 

What do you think of Eimac tubes? Not limited for headphone amp.

 

100TH (Eimac) 5V 6.3A 100W (4T17)
250TL (Hitachi)  5V 10.5A 250W (5T20)
450TL (Toshiba) 7.5V 12A 450W (5T30)
750TL  (Eimac)  7.5V 21A 750W (6T35)

1000


Edited by Seamaster - 11/18/12 at 6:55pm
post #1059 of 10384
Thread Starter 
Quote:
Originally Posted by 2359glenn View Post

You can get a adapter to use a 12AU7 in the 6SN7 socket or a 6CG7/6FQ7 but you might be better off selling them and use the money to buy a real 6SN7 or

one of it's variants. Better sounding then those 9 pin tubes. and you are not going to have one that beats your TSBGRP 6SN7s

 

Thanks! Ignore the PM I just sent asking you this very question. I walked into the room and sent the PM first and only now reading this thread. rolleyes.gif

post #1060 of 10384

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.


Edited by rosgr63 - 11/18/12 at 11:32pm
post #1061 of 10384
Thread Starter 

Up all night, rather than listening to music or watching TV, I have been sorting through tubes. Man, was this inventory of old tubes dirty! eek.gif I did find a few this morning that I like. Wait, let me clarify that remark - by appearances - haven't tested or heard any of them. 

 

I found a RCA Globe UX-245 with engraved base that looks beautiful. I remember when Glenn debuted the USAF-596. I wanted it bad and contacted him, not even caring if I couldn't use it, but what was tongue_smile.gif his asking price?! I was all set to simply collect that bad boy. Turns out, my amp was able to use it after all.wink.gif

 

The story repeats itself here - I'm going to keep this beautiful glass whether I can use it or not. I do wonder though, if the OTL can some how, some way use it...rolleyes.gif biggrin.gif

 

Sample of what I'm working with below:

 

da7e460e_DSC_9750600x399-Copy.jpegcb32649e_DSC_9747600x399-Copy.jpeg

d1c5c7f1_DSC_9745600x399-Copy.jpeg

post #1062 of 10384

Very nice tubes SO, let us know how you get on.

post #1063 of 10384
Thread Starter 

Thanks. If, the master of thermionic valves himself suggests I could use the UX-245 glass, I'll stay up all night for impressions. And if not, I'll stay up all night anyway just to admire it. biggrin.gif

post #1064 of 10384

From what I can see it has a UX4 base, so you'll need an adapter.

 

It's a DHT tube at 2.5V you'll need two of them.

I'll let Glenn fill in the details.

post #1065 of 10384
Thread Starter 
Quote:
Originally Posted by rosgr63 View Post

From what I can see it has a UX4 base, so you'll need an adapter.

 

It's a DHT tube at 2.5V you'll need two of them.

I'll let Glenn fill in the details.

 

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.


Edited by Silent One - 11/19/12 at 7:03am
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › 2359glenn | studio