[Adam Stouffer]

TDSL turned up no info for an 8102 and the only info I can find on the
5662 is that the Radio Amateurs Handbook calls it a "thyratron fuse".
So does anyone know what an 8102 is and how is a thyratron fuse
different from a normal thyratron. Thank you.


Adam

[Phil Allison]

"Adam Stouffer"

TDSL turned up no info for an 8102 and the only info I can find on the
5662 is that the Radio Amateurs Handbook calls it a "thyratron fuse".
So does anyone know what an 8102 is and how is a thyratron fuse different
from a normal thyratron.


** The 8102 is a noval ( 9 pin) triode / pentode with 13.5 volt heater.

It's in the GE " Essential Characteristics" book.



....... Phil

[Sean]

Phil Allison wrote:
"Adam Stouffer"

TDSL turned up no info for an 8102 and the only info I can find on the
5662 is that the Radio Amateurs Handbook calls it a "thyratron fuse".
So does anyone know what an 8102 is and how is a thyratron fuse different
from a normal thyratron.


** The 8102 is a noval ( 9 pin) triode / pentode with 13.5 volt heater.

It's in the GE " Essential Characteristics" book.


5662 = miniature gas thyratron used as a fuse in electric blankets!

[Chuck Harris]

Phil Allison wrote:
"Adam Stouffer"

TDSL turned up no info for an 8102 and the only info I can find on the
5662 is that the Radio Amateurs Handbook calls it a "thyratron fuse".
So does anyone know what an 8102 is and how is a thyratron fuse different
from a normal thyratron.

A thyratron fuse is a thyratron used as a fuse in a bomb or artillery shell.
In this case, the "fuse" is the thing that triggers the bomb to blow up.

A "thyratron fuse" probably is built to be very small and rugged, but since it
only triggers the one time, a long operating life probably isn't high on their
list of required characteristics.

-Chuck

[Adam Stouffer]

Chuck Harris wrote:


A thyratron fuse is a thyratron used as a fuse in a bomb or artillery
shell.
In this case, the "fuse" is the thing that triggers the bomb to blow up.

A "thyratron fuse" probably is built to be very small and rugged, but
since it
only triggers the one time, a long operating life probably isn't high on
their
list of required characteristics.

-Chuck

Wonder what the advantage is over a regular fuse, the ability to be
reset? I'll have to wire one up and see if it behaves like a normal
thyratron and oscillates. My latest project is a tube synth based on
Eric Barbours designs.


Adam

[Chuck Harris]

Adam Stouffer wrote:
Chuck Harris wrote:


A thyratron fuse is a thyratron used as a fuse in a bomb or artillery
shell.
In this case, the "fuse" is the thing that triggers the bomb to blow up.

A "thyratron fuse" probably is built to be very small and rugged, but
since it
only triggers the one time, a long operating life probably isn't high
on their
list of required characteristics.

-Chuck

Wonder what the advantage is over a regular fuse, the ability to be
reset? I'll have to wire one up and see if it behaves like a normal
thyratron and oscillates. My latest project is a tube synth based on
Eric Barbours designs.


Adam

You don't appear to understand what I said. I'm sorry, I'll try again. When you
light a firecracker, you light the *fuse*. A thyratron *fuse* does the
same thing for a bomb, or artillery shell as the fuse does for a firecracker...
it lights the fuse.

The principal advantage of a thyratron in this application is it is easily triggered
with a small electrical signal, and once it is triggered, it will dump all of the charge
from the firing capacitor into the blasting cap, or other device, that makes the bomb
go boom.

-Chuck

[robert casey]

Chuck Harris wrote:

Adam Stouffer wrote:

Chuck Harris wrote:


A thyratron fuse is a thyratron used as a fuse in a bomb or artillery
shell.
In this case, the "fuse" is the thing that triggers the bomb to blow up.

A "thyratron fuse" probably is built to be very small and rugged, but
since it
only triggers the one time, a long operating life probably isn't high
on their
list of required characteristics.



You don't appear to understand what I said. I'm sorry, I'll try again.
When you
light a firecracker, you light the *fuse*. A thyratron *fuse* does the
same thing for a bomb, or artillery shell as the fuse does for a
firecracker...
it lights the fuse.


The word "fuse" has two different meanings. One meaning is a name for
that device that burns out and goes open when you pass too much current
thru it. Another meaning is that rope like thing you light with a match
to slowly burn to the explosive to then make it blow up. This gives you
time to run away.... One of the above posters is getting these mixed up...

[Chuck Harris]

robert casey wrote:
Chuck Harris wrote:

Adam Stouffer wrote:

Chuck Harris wrote:


A thyratron fuse is a thyratron used as a fuse in a bomb or
artillery shell.
In this case, the "fuse" is the thing that triggers the bomb to blow
up.

A "thyratron fuse" probably is built to be very small and rugged,
but since it
only triggers the one time, a long operating life probably isn't
high on their
list of required characteristics.



You don't appear to understand what I said. I'm sorry, I'll try
again. When you
light a firecracker, you light the *fuse*. A thyratron *fuse* does the
same thing for a bomb, or artillery shell as the fuse does for a
firecracker...
it lights the fuse.


The word "fuse" has two different meanings. One meaning is a name for
that device that burns out and goes open when you pass too much current
thru it. Another meaning is that rope like thing you light with a match
to slowly burn to the explosive to then make it blow up. This gives you
time to run away.... One of the above posters is getting these mixed
up...


Uhmmm, which one might that be?

-Chuck

[Tim Shoppa]

On Jul 2, 9:51 pm, Sean wrote:
Phil Allison wrote:
"Adam Stouffer"

TDSL turned up no info for an 8102 and the only info I can find on the
5662 is that the Radio Amateurs Handbook calls it a "thyratron fuse".
So does anyone know what an 8102 is and how is a thyratron fuse different
from a normal thyratron.

** The 8102 is a noval ( 9 pin) triode / pentode with 13.5 volt heater.

It's in the GE " Essential Characteristics" book.

5662 = miniature gas thyratron used as a fuse in electric blankets!

Wasn't it also used mainly in the variable heat control much like a
SCR is used in modern light dimmers?

And through the miracle of specific-applicatin devices it just
happened to have the fusible link in the bulb too?

Tim.

[PhattyMo]

Chuck Harris wrote:
robert casey wrote:
Chuck Harris wrote:

Adam Stouffer wrote:

Chuck Harris wrote:


A thyratron fuse is a thyratron used as a fuse in a bomb or
artillery shell.
In this case, the "fuse" is the thing that triggers the bomb to
blow up.

A "thyratron fuse" probably is built to be very small and rugged,
but since it
only triggers the one time, a long operating life probably isn't
high on their
list of required characteristics.



You don't appear to understand what I said. I'm sorry, I'll try
again. When you
light a firecracker, you light the *fuse*. A thyratron *fuse* does the
same thing for a bomb, or artillery shell as the fuse does for a
firecracker...
it lights the fuse.


The word "fuse" has two different meanings. One meaning is a name for
that device that burns out and goes open when you pass too much
current thru it. Another meaning is that rope like thing you light
with a match to slowly burn to the explosive to then make it blow up.
This gives you time to run away.... One of the above posters is
getting these mixed up...


Uhmmm, which one might that be?

-Chuck

There are also "proximity fuses",that were/are used in warheads and
missiles,etc. Apparently the early versions of these were (tubed!)
radar-like devices..
IIRC,there was a discussion about some of them not along ago on
Usenet,but I don't remember which newsgroup it was in...(Google should
find it though.)

[Chuck Harris]

PhattyMo wrote:

up. This gives you time to run away.... One of the above posters
is getting these mixed up...


Uhmmm, which one might that be?

-Chuck

There are also "proximity fuses",that were/are used in warheads and
missiles,etc. Apparently the early versions of these were (tubed!)
radar-like devices..
IIRC,there was a discussion about some of them not along ago on
Usenet,but I don't remember which newsgroup it was in...(Google should
find it though.)

Back in the day(circa WWII), the US fielded vacuum tube based proximity
fuses that were used in bombs, and artillery shells. The fuse used a CW
Doppler radar effect to sense the presence of a large metal object (hopefully
an enemy airplane), and detonate. It was a vastly better more effective
than the previous contact detonating, and timer detonating shells.

The proximity fuse had a couple of tubes that formed the Doppler detector,
and a thyratron *fuse* that dumped a large capacitor into a detonator cap
that detonated the explosives. Hence the name "fuse".

The 5662 is a very tiny 7 pin glass tube thyratron. I can buy them over
the internet for less than $5, but I haven't had any luck finding a data
sheet. It appears to be capable of withstanding a 150A pulse a single
time... a perfect characteristic for a bomb fuse.

-Chuck

[Adam Stouffer]

Chuck Harris wrote:


The 5662 is a very tiny 7 pin glass tube thyratron. I can buy them over
the internet for less than $5, but I haven't had any luck finding a data
sheet. It appears to be capable of withstanding a 150A pulse a single
time... a perfect characteristic for a bomb fuse.

-Chuck

I picked up two on ebay for $3 each along with a rare 932
photomultiplier tube. But anyhow the 5662 is a really odd tube. Theres a
bare cathode next to a plate with a small hole near the bottom. On the
other side of the hole is a single wire electrode. I'll post a pic of it
soon.


Adam