You could be right, I'm only going on "fleeting" memory. I do recall
though - seeing a few "metal" tubes in High School shop class way back
when - and as I said, I am sure I have a metal tube or two in my stock. As
to the number, who knows! I do know - about 14 years ago - I smashed a LOT
of tubes used in older radios of the 40s and so - and more so of car radios
and tvs. Try as I might to get rid of them then, no luck. E-Bay was not yet
born - DAMNED! Now I have to look in my tube stock, the curiousity is
getting to me.

"826" wrote in message ...
Hi,
It was only made with a glass envelope. Some had metal bases.
Vern

"Radiosrfun" wrote in message
...
Steel or other sort of metal, i'm not sure - seems to me - there was in
fact a metal 6SN7. I further believe I have one in my stock of tubes -
somewhere. IF I can find time to look - and do find one - will send the
interested party - a photo of it.

"Henry Kolesnik" wrote in message
. ..
I've never seen or heard of a steel 6SN7 and I started with tubes in the
early fifties. Now you have me wondering about metal tubes and except
for 6L6 most were real popular in car radios and 5 tube ac dc, also
military. Does anyone recall the first metal tube, who made it, why and
what they touted as their advantage other than it wouldn't break if
dropped. I also recall a real hi power amp being made with 6L6s that
were cooled by them hanging udside down from the chassis in a bowl of
water and others immersed them in oil.


--

73
Hank WD5JFR
"Theo" wrote in message
...
Regarding the "all metal" tubes series by RCA,
can anyone tell me if there was ever a metal version
of the 6SN7?
I cannot find any reference on the web.
Any help would be greatly appreciated.

Metal tubes were the first octal based tubes (1935). The GT came later.

Tube Lore, by Ludwell Sibley (http://www.eht.com/oldradio/tubelore/) is a
must have if you want to go deeper into the history of tubes.

The 6SN7 was always a GT.

Steve.
--
Steven D. Swift, , http://www.novatech-instr.com
NOVATECH INSTRUMENTS, INC. P.O. Box 55997
206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA

Radiosrfun wrote:
You could be right, I'm only going on "fleeting" memory. I do recall
though - seeing a few "metal" tubes in High School shop class way back
when - and as I said, I am sure I have a metal tube or two in my stock. As
to the number, who knows! I do know - about 14 years ago - I smashed a LOT
of tubes used in older radios of the 40s and so - and more so of car radios
and tvs. Try as I might to get rid of them then, no luck. E-Bay was not yet
born - DAMNED! Now I have to look in my tube stock, the curiousity is
getting to me.

"826" wrote in message ...
Hi,
It was only made with a glass envelope. Some had metal bases.
Vern

"Radiosrfun" wrote in message
...
Steel or other sort of metal, i'm not sure - seems to me - there was in
fact a metal 6SN7. I further believe I have one in my stock of tubes -
somewhere. IF I can find time to look - and do find one - will send the
interested party - a photo of it.

"Henry Kolesnik" wrote in message
. ..
I've never seen or heard of a steel 6SN7 and I started with tubes in the
early fifties. Now you have me wondering about metal tubes and except
for 6L6 most were real popular in car radios and 5 tube ac dc, also
military. Does anyone recall the first metal tube, who made it, why and
what they touted as their advantage other than it wouldn't break if
dropped. I also recall a real hi power amp being made with 6L6s that
were cooled by them hanging udside down from the chassis in a bowl of
water and others immersed them in oil.


--

73
Hank WD5JFR
"Theo" wrote in message
...
Regarding the "all metal" tubes series by RCA,
can anyone tell me if there was ever a metal version
of the 6SN7?
I cannot find any reference on the web.
Any help would be greatly appreciated.






Here is a link to an old "Woodie Deluxe" circa 1946 to 1948 that came
with a metal 6SN7 as the preamp.

http://www.ampwares.com/ffg/deluxe_woodie.html

This next link shows a guy that had 10 of them for sale.

http://listserv.tempe.gov/admin/WA.E...=-3&S=&P=46879

Here is a quote and link to a store that has them in stock.

"Whether you need a specific nuvister, or the
metal version of a 6SN7, we've got it in stock."

http://www.wizardelectronics.com/parts.htm

It is possible they might be referring to the metal base in all these too.

I couldn't find a good picture of one in my limited search.

73,
Paul
WD8OSU

"Paul E. Cater" wrote in message
...
Radiosrfun wrote:
You could be right, I'm only going on "fleeting" memory.
I do recall though - seeing a few "metal" tubes in High
School shop class way back when - and as I said, I am
sure I have a metal tube or two in my stock. As to the
number, who knows! I do know - about 14 years ago - I
smashed a LOT of tubes used in older radios of the 40s
and so - and more so of car radios and tvs. Try as I
might to get rid of them then, no luck. E-Bay was not yet
born - DAMNED! Now I have to look in my tube stock, the
curiousity is getting to me.

"826" wrote in message
...
Hi,
It was only made with a glass envelope. Some had metal
bases.
Vern

"Radiosrfun" wrote in
message
...
Steel or other sort of metal, i'm not sure - seems to
me - there was in fact a metal 6SN7. I further believe
I have one in my stock of tubes - somewhere. IF I can
find time to look - and do find one - will send the
interested party - a photo of it.

"Henry Kolesnik" wrote
in message
. ..
I've never seen or heard of a steel 6SN7 and I started
with tubes in the early fifties. Now you have me
wondering about metal tubes and except for 6L6 most
were real popular in car radios and 5 tube ac dc, also
military. Does anyone recall the first metal tube, who
made it, why and what they touted as their advantage
other than it wouldn't break if dropped. I also
recall a real hi power amp being made with 6L6s that
were cooled by them hanging udside down from the
chassis in a bowl of water and others immersed them in
oil.


--

73
Hank WD5JFR
"Theo" wrote in message
...
Regarding the "all metal" tubes series by RCA,
can anyone tell me if there was ever a metal version
of the 6SN7?
I cannot find any reference on the web.
Any help would be greatly appreciated.






Here is a link to an old "Woodie Deluxe" circa 1946 to
1948 that came with a metal 6SN7 as the preamp.

http://www.ampwares.com/ffg/deluxe_woodie.html

This next link shows a guy that had 10 of them for sale.

http://listserv.tempe.gov/admin/WA.E...=-3&S=&P=46879

Here is a quote and link to a store that has them in
stock.

"Whether you need a specific nuvister, or the
metal version of a 6SN7, we've got it in stock."

http://www.wizardelectronics.com/parts.htm

It is possible they might be referring to the metal base
in all these too.

I couldn't find a good picture of one in my limited
search.

73,
Paul
WD8OSU

Well, it looks like there _were_ metal 6SN7's, the
amplifier definitely has three glass and two metal tubes.
Its odd I can't remember ever seeing one and I have been
working with tubes since there was nother else.


--
---
Richard Knoppow
Los Angeles, CA, USA




--
Posted via a free Usenet account from http://www.teranews.com

This is a wild guess but as best I recall the 6SN7 was used mainly in
low freq. multivibrator circuits in radar and TV and weren't shielded so
there was no need for a metal shield. It cam after the craze of metal
tubes wore off.

--

73
Hank WD5JFR
"Richard Knoppow" wrote in message
.. .

"Paul E. Cater" wrote in message
...
Radiosrfun wrote:
You could be right, I'm only going on "fleeting" memory. I do recall
though - seeing a few "metal" tubes in High School shop class way
back when - and as I said, I am sure I have a metal tube or two in
my stock. As to the number, who knows! I do know - about 14 years
ago - I smashed a LOT of tubes used in older radios of the 40s and
so - and more so of car radios and tvs. Try as I might to get rid of
them then, no luck. E-Bay was not yet born - DAMNED! Now I have to
look in my tube stock, the curiousity is getting to me.

"826" wrote in message
...
Hi,
It was only made with a glass envelope. Some had metal bases.
Vern

"Radiosrfun" wrote in message
...
Steel or other sort of metal, i'm not sure - seems to me - there
was in fact a metal 6SN7. I further believe I have one in my stock
of tubes - somewhere. IF I can find time to look - and do find
one - will send the interested party - a photo of it.

"Henry Kolesnik" wrote in message
. ..
I've never seen or heard of a steel 6SN7 and I started with tubes
in the early fifties. Now you have me wondering about metal
tubes and except for 6L6 most were real popular in car radios and
5 tube ac dc, also military. Does anyone recall the first metal
tube, who made it, why and what they touted as their advantage
other than it wouldn't break if dropped. I also recall a real hi
power amp being made with 6L6s that were cooled by them hanging
udside down from the chassis in a bowl of water and others
immersed them in oil.


--

73
Hank WD5JFR
"Theo" wrote in message
...
Regarding the "all metal" tubes series by RCA,
can anyone tell me if there was ever a metal version
of the 6SN7?
I cannot find any reference on the web.
Any help would be greatly appreciated.






Here is a link to an old "Woodie Deluxe" circa 1946 to 1948 that came
with a metal 6SN7 as the preamp.

http://www.ampwares.com/ffg/deluxe_woodie.html

This next link shows a guy that had 10 of them for sale.

http://listserv.tempe.gov/admin/WA.E...=-3&S=&P=46879

Here is a quote and link to a store that has them in stock.

"Whether you need a specific nuvister, or the
metal version of a 6SN7, we've got it in stock."

http://www.wizardelectronics.com/parts.htm

It is possible they might be referring to the metal base in all these
too.

I couldn't find a good picture of one in my limited search.

73,
Paul
WD8OSU

Well, it looks like there _were_ metal 6SN7's, the amplifier
definitely has three glass and two metal tubes. Its odd I can't
remember ever seeing one and I have been working with tubes since
there was nother else.


--
---
Richard Knoppow
Los Angeles, CA, USA



--
Posted via a free Usenet account from http://www.teranews.com

Here is a link to an old "Woodie Deluxe" circa 1946 to 1948 that came
with a metal 6SN7 as the preamp.

http://www.ampwares.com/ffg/deluxe_woodie.html


The photo shows glass 6SN7GT. There are two metal 6v6. The description
doesn't match the photos.

6SN7GT were often coated on the inside for shielding.
--
Steven D. Swift, , http://www.novatech-instr.com
NOVATECH INSTRUMENTS, INC. P.O. Box 55997
206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA