What is the difference btwn 6V6GTA/6V6GT?
Ful...@minmet.lan.mcgill.ca
I use some 6V6 GTA in my guitar amp and the other day I got a box full of old tubes, where I found some
6V6 GT. I tryed in the amp and it worked fine, lots of compression, beautiful sound. Does anybody know if I
can harm the amp with this "A" difference and why it sounded better? It is a Fender Deluxe Reverb II amp.
Thanks a lot
Fulvio
Joseph Lowe
Ful...@MinMet.LAN.McGill.CA wrote:
: I use some 6V6 GTA in my guitar amp and the other day I got a box full of
: fine, lots of compression, beautiful sound. Does anybody know if I
: can harm the amp with this "A" difference
The only difference in the GT and GTA is the GTA has a controlled heater
warm up time. Thus was important when the filament was wired in series
with other tubes. Otherwise they are the same.
:and why it sounded better?
There are always differences in the sound of tubes depending on brand, age
ect... Hard to say. If they were used, they could be a little on the weak
side giving you the "compression".
Joe
Mark W
Ful...@MinMet.LAN.McGill.CA wrote:
>
> I use some 6V6 GTA in my guitar amp and the other day I got a box full of old tubes, where I found some
> 6V6 GT. I tryed in the amp and it worked fine, lots of compression, beautiful sound. Does anybody know if I
>
> Thanks a lot
>
> Fulvio
The 6V6GTA was simply the more recent edition of the 6V6GT but both
tubes are almost identical. Any difference in sound you hear may be due
to a different manufacturer, better (or worse) quality, and so forth.
You'll be amazed at how the same kinds of tubes can sound quite
different.
Mark
Ned Carlson
Mark W <ma...@x-press.net> wrote:
>
>The 6V6GTA was simply the more recent edition of the 6V6GT but both
>tubes are almost identical.
The latter day 6V6-GTA used composite (multi-layer) plate material,
instead of the black stuff you'd see in an old 6V6-GT.
Thus an additional 2 watts of plate dissipation (14 vs 12)
Some old 6V6-GT might have problems (like glowing
plates) if installed directly in amps where 6V6-GTA
was specified originally (answer is to make the bias more
negative), as might the Russian 6V6-GT.
Ned Carlson, Triode Electronics, Chicago, IL http://www.triodeel.com
Open 12:30-8 PM CT, 12:30-5 PM CT Sat Closed Wed
ph:773-871-7459 fax 773-871-7938 "where da tubes are"
Email catalogs: email our CataBot: cat...@triodeel.com
Charles Cohen
On Fri, 10 Oct 1997 08:56:49 GMT, trio...@ameritech.net (Ned Carlson)
wrote:
>jl...@shore.net (Joseph Lowe) wrote:
>
>>
>>The only difference in the GT and GTA is the GTA has a controlled heater
>>warm up time. Thus was important when the filament was wired in series
>>with other tubes. Otherwise they are the same.
>
>Uhuh. Old 6V6-GT had 12W plate dissipation, later model 6V6-GTA
>had 14 W plate dissipatrion. Plate material was not the same,
>re US made items.
>
>>There are always differences in the sound of tubes depending on brand, age
>>ect... Hard to say. If they were used, they could be a little on the weak
>>side giving you the "compression".
>
>That I agree with.
>
>
>Ned Carlson, Triode Electronics, Chicago, IL http://www.triodeel.com
>Open 12:30-8 PM CT, 12:30-5 PM CT Sat Closed Wed
>ph:773-871-7459 fax 773-871-7938 "where da tubes are"
>Email catalogs: email our CataBot: cat...@triodeel.com
Hi all,
I have some RCA JAN CRC 6V6GTY tubes. Their boxes are stamped JAN
1952. Can anybody tell me how these would work in a 6V6GT
application such as a mid- sixties Fender "black face" Deluxe Reverb
guitar amp?
Thanks,
Chuck
Ned Carlson
cfc...@total.net (Charles Cohen) wrote:
>I have some RCA JAN CRC 6V6GTY tubes. Their boxes are stamped JAN
>1952. Can anybody tell me how these would work in a 6V6GT
>application such as a mid- sixties Fender "black face" Deluxe Reverb
>guitar amp?
Should be OK, note you should have them biased so that
plate dissipation does not exceed 10W (I'm being conservative, but
remember you are running old tubes that are difficult to replace)
IOW not more than 20 ma per tube.