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  #31  
Old 08-08-2014, 11:36 AM
muscmp muscmp is offline
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Quote:
Originally Posted by Dru Edwards View Post
Lots of great responses here - thanks everyone. I didn't realize we had such tube aficionados here but then again we have had great threads about tube amps too.

Does anyone generally prefer tube rectifiers over the solid state ones? I guess it really depends upon whether you want that "sag" or on not?
i have no preference. i have a blackface bassman with solid state that sounds great and, i have a bunch with tube that also sounds great. i guess i just listen and like the sound of the individual amps for what they are and not what is inside them. . .other than NOS tubes of course. ha!

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  #32  
Old 08-08-2014, 12:04 PM
BTF BTF is offline
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I love my old valve stuff, but honestly, if I could find a solid state power amp with which I could satisfactorily replace my JTM45, I'd use it in a second.
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  #33  
Old 08-08-2014, 12:28 PM
terrapin terrapin is offline
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Originally Posted by BTF View Post
I love my old valve stuff, but honestly, if I could find a solid state power amp with which I could satisfactorily replace my JTM45, I'd use it in a second.
Solid State to replace a JTM45.............. It AIN'T gonna happen!
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  #34  
Old 08-08-2014, 12:29 PM
zabdart zabdart is offline
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I wish RCA was still making vacuum tubes. Man... they were the best! Philips Broadcasting and Raytheon tubes weren't far behind, either. Today's tube manufacturers just don't reach those standards.
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  #35  
Old 08-08-2014, 12:50 PM
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Bob Womack Bob Womack is offline
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I love tube rectifier sag and I love cathode bias as well.

Bob
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  #36  
Old 08-08-2014, 01:32 PM
terrapin terrapin is offline
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Originally Posted by Bob Womack View Post
I love tube rectifier sag and I love cathode bias as well.

Bob
Same here Bob. Dual sag. But, it I were a "shredder" (thank God I am not) I would want a solid state rectifier.
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  #37  
Old 08-08-2014, 02:49 PM
Dru Edwards Dru Edwards is offline
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I'm on vacation at my Dad's and there's a very old large radio, about 3 feet high, in the basement that was my grandfather's. It used to catch stations around the world (is that short wave?).

Anyway, I just checked and there are 6 unopened boxes of tubes in the back. None appear to be guitar related though. I have no idea what they are. A couple of 6SN7, 3CB6, 6BE6, 6F6, and 5X8. All tubes made in Canada or the US. Too bad I didn't stumble across some 12ax7s.
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  #38  
Old 08-08-2014, 02:59 PM
terrapin terrapin is offline
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Quote:
Originally Posted by Dru Edwards View Post
I'm on vacation at my Dad's and there's a very old large radio, about 3 feet high, in the basement that was my grandfather's. It used to catch stations around the world (is that short wave?).

Anyway, I just checked and there are 6 unopened boxes of tubes in the back. None appear to be guitar related though. I have no idea what they are. A couple of 6SN7, 3CB6, 6BE6, 6F6, and 5X8. All tubes made in Canada or the US. Too bad I didn't stumble across some 12ax7s.
Dru, you might check and make sure that these cannot be substitutions for amp preamp tubes. Are they all 9-pin triodes or dual triodes?
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  #39  
Old 08-08-2014, 04:01 PM
BTF BTF is offline
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Of that lot only the 6SN7 is even remotely a guitar amp tube. The 6F6 and the 6V6 are near, but DO NOT try to sub it in a guitar amp.
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  #40  
Old 08-08-2014, 04:14 PM
Dru Edwards Dru Edwards is offline
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Quote:
Originally Posted by terrapin View Post
Dru, you might check and make sure that these cannot be substitutions for amp preamp tubes. Are they all 9-pin triodes or dual triodes?
Thanks Russ. I googled each of the tubes.

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Originally Posted by BTF View Post
Of that lot only the 6SN7 is even remotely a guitar amp tube. The 6F6 and the 6V6 are near, but DO NOT try to sub it in a guitar amp.
Looks like the 6SN7 was used before being replaced by the 12AU7. It's a dual triode 8 pin. Not sure if it's a directly replacement or not. Thanks for the note about the 6F6 / 6V6.
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  #41  
Old 08-08-2014, 06:05 PM
BTF BTF is offline
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Dru:

It's an octal (8-pin) large tube. The 12AU7 is noval (nine-pin) miniature and is of course the same size as- and except for electronic parameters interchangeable with- your 12AX7s.

It's a bummer. I had a whole slew of valve radios from the 50's and 60's and unfortunately they were all transformerless designs that ran the tubes directly off the 110-120VAC from the wall. Not a usable tube in the lot.

Last edited by BTF; 08-08-2014 at 06:19 PM. Reason: poor typing! :)
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  #42  
Old 08-08-2014, 06:33 PM
muscmp muscmp is offline
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i have some old gibson amps that use the 6sq7, 6sn7 and 6sl7 preamp tubes. great amps. some of the boutique amp makers are now making amps using these tubes. great sound but quite different than a 12ax7 and its bretheren.

i may be able to use the 6sn7 dru if you are wanting to part with it.

thanks,
play music!
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  #43  
Old 08-10-2014, 10:56 AM
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I'd have to get my amp book out to confirm, but I think Fender used octal based preamp tubes before the mid fifties. The early tweeds and woodies used 6SN7 preamp tubes, IIRC.
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  #44  
Old 08-10-2014, 11:40 AM
muscmp muscmp is offline
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Quote:
Originally Posted by clintj View Post
I'd have to get my amp book out to confirm, but I think Fender used octal based preamp tubes before the mid fifties. The early tweeds and woodies used 6SN7 preamp tubes, IIRC.
clintj: you are correct according to my fender amps book. for example, the deluxe, 5d3 eliminated the 6sc7 tubes and replaced them with a 12ax7 and a 12ay7.

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  #45  
Old 08-10-2014, 01:58 PM
Dru Edwards Dru Edwards is offline
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Quote:
Originally Posted by muscmp View Post
i have some old gibson amps that use the 6sq7, 6sn7 and 6sl7 preamp tubes. great amps. some of the boutique amp makers are now making amps using these tubes. great sound but quite different than a 12ax7 and its bretheren.

i may be able to use the 6sn7 dru if you are wanting to part with it.

thanks,
play music!
I'll keep you in mind but I don't think the tubes are going anywhere.

Quote:
Originally Posted by clintj View Post
I'd have to get my amp book out to confirm, but I think Fender used octal based preamp tubes before the mid fifties. The early tweeds and woodies used 6SN7 preamp tubes, IIRC.
Thanks for the info Clint.
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