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6SN7 Tube Addicts - Page 207

post #3091 of 3547
12/24/12 at 12:59am
Thread Starter 

They are GTB type tubes, they look of the same construction.

IMHO there is nothing to be concerned about, just enjoy them.

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post #3092 of 3547
12/24/12 at 1:25am

Yep, both Tung-Sols, and the rectifier was clearly made by Mullard and should have a Mullard code on it.

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post #3093 of 3547
12/24/12 at 12:25pm
Zaerix tubes are truly a surprise in the box every time. Often Mullard, STC, or other very nice tubes. Sometimes Russian, of Japanese. They were only a rebrander, so you just don't know.
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post #3094 of 3547
12/24/12 at 3:53pm
I have been listening to a pair of TS 6F8G RPs in my Modwright Oppo. These are very fine tubes. I would have to put them in my top 5 of 6SN7/6F8G list.
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post #3095 of 3547
12/24/12 at 4:56pm

I have to say that Im not alone if I say the TS 6f8g RP sounds better than their 6sn7 counterpart?

I have both their round and oval mica of the 6f8g and its sounds better to me than their 6sn7 RP oval mica.

Even have a rare 6f8g square mica from TS that havent tried yet.

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post #3096 of 3547
12/24/12 at 7:34pm

Have you found a material difference in the sound between the round and oval mica 6F8G?

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post #3097 of 3547
12/24/12 at 9:15pm

They sound very similar but the round mica sounds better to me.  Just a tad more musical.  I could live with either one but if i had to choose I would take the round mica.  Have not tried the 6sn7 round mica though.

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post #3098 of 3547
12/25/12 at 1:07am
Thread Starter 

There is also a Ken-Rad 6F8G with oval plates worth trying.

 

The TS 6F8G with the square mica have flat plates, and are not so rare in my opinion.

 

The 6SN7 with square mica on the other hand is very rare.

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post #3099 of 3547
12/25/12 at 1:33pm
Quote:
Originally Posted by Oskari View Post

the rectifier was clearly made by Mullard and should have a Mullard code on it.

 

As a matter of fact, the code also tells us whether that valve is a GZ33 (rS) or a GZ37 (IS). 

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post #3100 of 3547
12/26/12 at 1:19am

Well, I checked, what I could read is ISI (or IS1) 87F5. Not sure what the other numbers mean, I guess the serial number? Still much to learn...

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post #3101 of 3547
12/26/12 at 3:15am

That's IS1 B7F5. IS = GZ37; B = Mullard, Blackburn; 7F5 = 5th week of June 19?7. I'd guess 1967.

 

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post #3102 of 3547
12/26/12 at 1:42pm
Quote:
Originally Posted by Neogeo333 View Post

I have to say that Im not alone if I say the TS 6f8g RP sounds better than their 6sn7 counterpart?
I have both their round and oval mica of the 6f8g and its sounds better to me than their 6sn7 RP oval mica.
Even have a rare 6f8g square mica from TS that havent tried yet.
I agree with you. I own both and also prefer the 6F8G.
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post #3103 of 3547
12/28/12 at 10:07am
Thread Starter 

If anybody is interested at a nice quad or pair of ECC32's let me know.

These are not my own tubes but belong to a friend.

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post #3104 of 3547
12/29/12 at 2:20pm

Here's what my daughter and I did all day:

 

 

1000

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post #3105 of 3547
12/29/12 at 2:32pm

Ware did you get that?

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