Down The Tubes?

[Ron Hubbard]

I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

 

[John Larkin]

On Fri, 27 Jun 2008 06:08:39 -0700 (PDT), Ron Hubbard <ryon@quik.com>
wrote:

I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

Could be any of a number of parts. Can you post a pic?

John

 

[Tom Biasi]

"Ron Hubbard" <ryon@quik.com> wrote in message
news:add5c12c-1a93-43b8-bea3-0509af48e5b9@f63g2000hsf.googlegroups.com...

I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

If you can post a picture maybe I can help.
Also post your question and a picture link to rec.antiques.radio+phono,
someone there will know.

Tom

 

[Tim Wescott]

Ron Hubbard wrote:

On Jun 27, 6:21 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Fri, 27 Jun 2008 06:08:39 -0700 (PDT), Ron Hubbard <r...@quik.com
wrote:

I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.
It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.
Ron
Could be any of a number of parts. Can you post a pic?

Sigh... No; 'fraid not. For some inexplicable reason I can never keep
a scanner working for more than ywo or three days at the most, then
they go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump. ;-(

Ron

Perhaps you're trying to shut the lid all the way when you try to scan a

tube?

I'd think you'd diagnose the problem after breaking a few tubes, but if
you have to break the scanner glass...

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html

 

[Ron Hubbard]

On Jun 27, 6:21 am, John Larkin
<jjlar...@highNOTlandTHIStechnologyPART.com> wrote:

On Fri, 27 Jun 2008 06:08:39 -0700 (PDT), Ron Hubbard <r...@quik.com
wrote:

I bought  a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

Could be any of a number of parts. Can you post a pic?

Sigh... No; 'fraid not. For some inexplicable reason I can never keep
a scanner working for more than ywo or three days at the most, then
they go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump. ;-(

Ron

 

[Bob Eld]

"Ron Hubbard" <ryon@quik.com> wrote in message
news:add5c12c-1a93-43b8-bea3-0509af48e5b9@f63g2000hsf.googlegroups.com...

I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

Hard to say without more info, but it may be an 810, Transmitting Triode.
The max ratings of this tube are 2750 plate voltage, 250 ma plate current,
175 W dissipation., 10 volt fil. The base has four short pins. The grid is
the side cap and the plate the top cap. The tube is 8 1/2 in long and 2 9/16
diameter. The base is a bayonet mount.

 

[Tim Wescott]

Bob Eld wrote:

"Ron Hubbard" <ryon@quik.com> wrote in message
news:add5c12c-1a93-43b8-bea3-0509af48e5b9@f63g2000hsf.googlegroups.com...
I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

Hard to say without more info, but it may be an 810, Transmitting Triode.
The max ratings of this tube are 2750 plate voltage, 250 ma plate current,
175 W dissipation., 10 volt fil. The base has four short pins. The grid is
the side cap and the plate the top cap. The tube is 8 1/2 in long and 2 9/16
diameter. The base is a bayonet mount.


IIRC there are other tubes in the same package, but AFAIK (and I'm no

expert) the 810 is most likely.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html

 

[Ron Hubbard]

On Jun 27, 4:34 pm, Tim Wescott <t...@seemywebsite.com> wrote:

Ron Hubbard wrote:
On Jun 27, 6:21 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Fri, 27 Jun 2008 06:08:39 -0700 (PDT), Ron Hubbard <r...@quik.com
wrote:

I bought  a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.
It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.
Ron
Could be any of a number of parts. Can you post a pic?

Sigh...  No; 'fraid not. For some inexplicable reason I can never keep
a scanner working for more than ywo or three days at the most, then
they go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump.  ;-(

Ron

Perhaps you're trying to shut the lid all the way when you try to scan a
tube?

I'd think you'd diagnose the problem after breaking a few tubes, but if
you have to break the scanner glass...

LOL. No, I don't do that.... I scan only paper pages and on rare
occasions, a few photos, and within a day or two after turning pages
into .jpeg files or whatever, I usually have a dead scanner; go
figure.

So now I quit buying scanners.; it's much cheaper that way.

Ron

 

[Ron Hubbard]

On Jun 27, 8:01 pm, Tim Wescott <t...@seemywebsite.com> wrote:

Bob Eld wrote:
"Ron Hubbard" <r...@quik.com> wrote in message
news:add5c12c-1a93-43b8-bea3-0509af48e5b9@f63g2000hsf.googlegroups.com....
I bought  a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

Hard to say without more info, but it may be an 810, Transmitting Triode.
The max ratings of this tube are 2750 plate voltage, 250 ma plate current,
175 W dissipation., 10 volt fil. The base has four short pins. The grid is
the side cap and the plate the top cap. The tube is 8 1/2 in long and 2 9/16
diameter. The base is a bayonet mount.

IIRC there are other tubes in the same package, but AFAIK (and I'm no
expert) the 810 is most likely.

--

Tim Wescott
Wescott Design Serviceshttp://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says..
See details athttp://www.wescottdesign.com/actfes/actfes.html- Hide quoted text -

- Show quoted text -

Thanks, Tim; I'll look into it. ;-)

Ron

 

[Stephen J. Rush]

On Fri, 27 Jun 2008 16:29:55 -0700, Ron Hubbard wrote:

Sigh... No; 'fraid not. For some inexplicable reason I can never keep a
scanner working for more than ywo or three days at the most, then they
go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump. ;-(

Don't dump them. Find a robotics hacker or someone who wants to build a
small CNC milling machine. They can use the steppers and precision slide
rods.

 

[Ron Hubbard]

On Jun 27, 7:57 pm, "Bob Eld" <nsmontas...@yahoo.com> wrote:

"Ron Hubbard" <r...@quik.com> wrote in message

news:add5c12c-1a93-43b8-bea3-0509af48e5b9@f63g2000hsf.googlegroups.com...

I bought  a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

Hard to say without more info, but it may be an 810, Transmitting Triode.
The max ratings of this tube are 2750 plate voltage, 250 ma plate current,
175 W dissipation., 10 volt fil. The base has four short pins. The grid is
the side cap and the plate the top cap. The tube is 8 1/2 in long and 2 9/16
diameter. The base is a bayonet mount.

Mine doesn't *quite* look like the few pictures I can find of it; so
it's likely to be the cheaper Chineese version I keep hearing about,
but it's an 810! Thanks for the help; much appreciated! ;-)

Ron

 

[Claude Hopper]

Ron Hubbard wrote:

On Jun 27, 6:21 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Fri, 27 Jun 2008 06:08:39 -0700 (PDT), Ron Hubbard <r...@quik.com
wrote:

I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.
It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.
Ron
Could be any of a number of parts. Can you post a pic?

Sigh... No; 'fraid not. For some inexplicable reason I can never keep
a scanner working for more than ywo or three days at the most, then
they go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump. ;-(

Ron

You don't need a scanner. You need a digital camera, download the jpg to
your computer and attach to email. No printer or scanner needed.

--
Claude Hopper

? ? Ľ

Why did Kamikaze pilots wear helmets?

 

[Ron Hubbard]

On Jun 27, 11:53 pm, "Stephen J. Rush" <sjr...@comcast.net> wrote:

On Fri, 27 Jun 2008 16:29:55 -0700, Ron Hubbard wrote:
Sigh...  No; 'fraid not. For some inexplicable reason I can never keep a
scanner working for more than ywo or three days at the most, then they
go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump.  ;-(

Don't dump them.  Find a robotics hacker or someone who wants to build a
small CNC milling machine.  They can use the steppers and precision slide
rods.

Hmmm, I would prefer to get one that'll last me more than three
days...

Ron

 

[amdx]

"christofire" <christofire@btinternet.com> wrote in message
news:cvSdnZfWqeKfhfvVRVnyiQA@bt.com...

"Ron Hubbard" <ryon@quik.com> wrote in message
news:1348aeba-9731-4a83-97a7-706b3f6662e3@r66g2000hsg.googlegroups.com...
On Jun 27, 4:34 pm, Tim Wescott <t...@seemywebsite.com> wrote:
Ron Hubbard wrote:
On Jun 27, 6:21 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Fri, 27 Jun 2008 06:08:39 -0700 (PDT), Ron Hubbard <r...@quik.com
wrote:

I bought a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one
sticking
off to the side in an "L" shaped arrangement.
It's obvious it's a power tube of some sort, but does anybody have
any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.
Ron
Could be any of a number of parts. Can you post a pic?

Sigh... No; 'fraid not. For some inexplicable reason I can never keep
a scanner working for more than ywo or three days at the most, then
they go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump. ;-(

Ron

Perhaps you're trying to shut the lid all the way when you try to scan a
tube?

I'd think you'd diagnose the problem after breaking a few tubes, but if
you have to break the scanner glass...

LOL. No, I don't do that.... I scan only paper pages and on rare
occasions, a few photos, and within a day or two after turning pages
into .jpeg files or whatever, I usually have a dead scanner; go
figure.

So now I quit buying scanners.; it's much cheaper that way.

Ron


You could use a digital camera, even one in a mobile 'phone, to take a
shot of the tube/valve.

What and break a camera and phone?

Mike

 

[John Larkin]

On Fri, 27 Jun 2008 16:29:55 -0700 (PDT), Ron Hubbard <ryon@quik.com>
wrote:

On Jun 27, 6:21 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Fri, 27 Jun 2008 06:08:39 -0700 (PDT), Ron Hubbard <r...@quik.com
wrote:

I bought  a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron

Could be any of a number of parts. Can you post a pic?

Sigh... No; 'fraid not. For some inexplicable reason I can never keep
a scanner working for more than ywo or three days at the most, then
they go dead on me. Why, I don't know, but I have the remains of four
scanners lying about just waiting for the garbage dump. ;-(

Ron

The cheapest USB digital camera I've seen, in a drug store, was
$12.95. And there are several good free picture hosting web sites
where you can dump stuff for everybody to see.

John

 

[christofire]

"Claude Hopper" <boobooililililil@roadrunner.com> wrote in message
news:ZOmdnbb3N9RyvPvVnZ2dnUVZ_uWdnZ2d@giganews.com...

-- snippity snip ---

? ? Ľ

Why did Kamikaze pilots wear helmets?

Probably in order to reach their drop zone without mishap (e.g. on account
of extreme turbulence).

Chris

 

On Jun 28, 7:15 pm, Ron Hubbard <r...@quik.com> wrote:
<snip>

If all I wanted to do was to post pictures, I don't even need a
digital camera-- I can buy a cheap disposable film camera, take my
photos, then have the developed pictures put onto a CD-- a process
that takes less than a day. But scanners serve other purposes than
just formatting pictures for the 'Net.

Ron

Disposable camera is a very expensive and time consuming way to do
that. You might find the digital camera to be far more useful than you
think. Taking something apart and want to get it back as it was?
Pictures. Some jerk hit your car and start to drive away? Camera will
stop them. Just as a joke I a snapped a pic of a 1" VTR scanner while
it was rotating 1 rev / field (3596.4 rpm) and completely froze the
motion. This is not some whiz-bang camera, just a Canon S2IS. You
should try it - I bet you'd like it.

G˛