What is a sold state vacuum tube voltmeter?

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mm

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What is a sold state vacuum tube voltmeter?

http://cgi.ebay.com/HP-AGILENT-410C-SOLID-STATE-VACUUM-TUBE-VOLTMETER-VTVM_W0QQitemZ350203989815QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5189c8cf37&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50

TIA
 
On Tue, 19 May 2009 16:16:59 -0400, mm <NOPSAMmm2005@bigfoot.com> wrote:
What is a sold state vacuum tube voltmeter?
Click to expand...
Probably a VTVM with solid state replacements for the tubes.
 
It's an electronic voltmeter that uses FETs instead of vacuum tubes.
 
On Tue, 19 May 2009 16:16:59 -0400, mm <NOPSAMmm2005@bigfoot.com> put
finger to keyboard and composed:

What is a sold state vacuum tube voltmeter?

http://cgi.ebay.com/HP-AGILENT-410C-SOLID-STATE-VACUUM-TUBE-VOLTMETER-VTVM_W0QQitemZ350203989815QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5189c8cf37&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50

TIA
Click to expand...
I found a "Department of the Army" technical manual:
ftp://bama.sbc.edu/downloads/hp/410c/410c.pdf

I found the following statement:

==========================================================
2-4. The Model 410C is transistorized except for
one vacuum tube and requires no special cooling.
==========================================================

See page 57 for a circuit diagram.

I found this amusing:

==========================================================
1-A.4. Reporting Errors and Recoin.
mending Improvements

You can help improve this manual. If you find any
mistakes or if you know of a way to improve the procedures,
please let us know.
==========================================================

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
"mm" <NOPSAMmm2005@bigfoot.com> wrote in message
news:ts4615pl8s7bjg6h11pul8j5s2v1o8co2f@4ax.com...
What is a sold state vacuum tube voltmeter?

An amplified solid state voltmeter made to emulate the impedance of a Vacuum
Click to expand...
Tube Voltmeter, so that it will accurately read voltages specified in
service data as read by a VTVM. Input impedance is usually specified as 11
Megohms for all DC Volt ranges and 10 Megohm for AC Volt ranges rather than
the Ohm/Volt specification for multimeters and VOMs.

The higher input impedance causes minimal loading of the circuit under test,
so less disruption of the circuit and more accurate readings.

The unit in the picture is a well known quality instrument widely specified
in lab manuals but looks like the probe wires need replacing.
 
mm wrote:
What is a sold state vacuum tube voltmeter?

http://cgi.ebay.com/HP-AGILENT-410C-SOLID-STATE-VACUUM-TUBE-VOLTMETER-VTVM_W0QQitemZ350203989815QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5189c8cf37&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50

TIA
Thats a voltmeter that has been sold....
Click to expand...
 
On Tue, 19 May 2009 21:43:53 GMT, "JB" <nospam@goofball.net> wrote:

"mm" <NOPSAMmm2005@bigfoot.com> wrote in message
news:ts4615pl8s7bjg6h11pul8j5s2v1o8co2f@4ax.com...
What is a sold state vacuum tube voltmeter?

An amplified solid state voltmeter made to emulate the impedance of a Vacuum
Tube Voltmeter, so that it will accurately read voltages specified in
service data as read by a VTVM. Input impedance is usually specified as 11
Megohms for all DC Volt ranges and 10 Megohm for AC Volt ranges rather than
the Ohm/Volt specification for multimeters and VOMs.

The higher input impedance causes minimal loading of the circuit under test,
so less disruption of the circuit and more accurate readings.

The unit in the picture is a well known quality instrument widely specified
in lab manuals but looks like the probe wires need replacing.
Click to expand...
Thanks to all of you. Especiialy JB.

Yes, it's been solidly sold. :)
 
On Tue, 19 May 2009 16:16:59 -0400, mm
<NOPSAMmm2005@bigfoot.com>wrote:

What is a sold state vacuum tube voltmeter?
Click to expand...
It's a transistorized VTM that should only be used to test vacuum
tubes.
 
"Meat Plow" <meat@petitmorte.net> wrote in message
news:2qtiap.blc.17.3@news.alt.net...
On Tue, 19 May 2009 16:16:59 -0400, mm
NOPSAMmm2005@bigfoot.com>wrote:

What is a sold state vacuum tube voltmeter?

It's a transistorized VTM that should only be used
to test vacuum tubes.
Click to expand...
Hmmm... Does that mean that VTVMs should only be used to test transistors?
 
In article <gv0tph$jr$1@news.eternal-september.org>,
"William Sommerwerck" <grizzledgeezer@comcast.net> wrote:

"Meat Plow" <meat@petitmorte.net> wrote in message
news:2qtiap.blc.17.3@news.alt.net...
On Tue, 19 May 2009 16:16:59 -0400, mm
NOPSAMmm2005@bigfoot.com>wrote:

What is a sold state vacuum tube voltmeter?

It's a transistorized VTM that should only be used
to test vacuum tubes.

Hmmm... Does that mean that VTVMs should only be used to test transistors?
Click to expand...
OK, here's a complete non-sequitur triggered by my brain's tendency to
free associate ...

Seymour Cray was once asked what kind of computer he used to design the
original Cray supercomputer. His reply: "I used a #2 pencil and a
quadrille pad."

Some years go by, and he's being interviewed again. The interviewer
says, "Did you know that Apple bought a Cray supercomputer to help them
design their new Mac?"

"That's funny," Mr. Cray says, "I just bought a Mac to help me design my
new supercomputer."

That's one of my favorite stories.
 
On Wed, 20 May 2009 05:41:06 -0700, "William Sommerwerck"
<grizzledgeezer@comcast.net>wrote:

"Meat Plow" <meat@petitmorte.net> wrote in message
news:2qtiap.blc.17.3@news.alt.net...
On Tue, 19 May 2009 16:16:59 -0400, mm
NOPSAMmm2005@bigfoot.com>wrote:

What is a sold state vacuum tube voltmeter?

It's a transistorized VTM that should only be used
to test vacuum tubes.

Hmmm... Does that mean that VTVMs should only be used to test transistors?
Click to expand...
I think you're on to something Bill.
 
On Wed, 20 May 2009 09:14:28 -0700, Smitty Two
<prestwhich@earthlink.net>wrote:

In article <gv0tph$jr$1@news.eternal-september.org>,
"William Sommerwerck" <grizzledgeezer@comcast.net> wrote:

"Meat Plow" <meat@petitmorte.net> wrote in message
news:2qtiap.blc.17.3@news.alt.net...
On Tue, 19 May 2009 16:16:59 -0400, mm
NOPSAMmm2005@bigfoot.com>wrote:

What is a sold state vacuum tube voltmeter?

It's a transistorized VTM that should only be used
to test vacuum tubes.

Hmmm... Does that mean that VTVMs should only be used to test transistors?

OK, here's a complete non-sequitur triggered by my brain's tendency to
free associate ...

Seymour Cray was once asked what kind of computer he used to design the
original Cray supercomputer. His reply: "I used a #2 pencil and a
quadrille pad."

Some years go by, and he's being interviewed again. The interviewer
says, "Did you know that Apple bought a Cray supercomputer to help them
design their new Mac?"

"That's funny," Mr. Cray says, "I just bought a Mac to help me design my
new supercomputer."

That's one of my favorite stories.
Click to expand...
LOLZ!
 
Smitty Two wrote:
In article <gv0tph$jr$1@news.eternal-september.org>,
"William Sommerwerck" <grizzledgeezer@comcast.net> wrote:

"Meat Plow" <meat@petitmorte.net> wrote in message
news:2qtiap.blc.17.3@news.alt.net...
On Tue, 19 May 2009 16:16:59 -0400, mm
NOPSAMmm2005@bigfoot.com>wrote:
What is a sold state vacuum tube voltmeter?
It's a transistorized VTM that should only be used
to test vacuum tubes.
Hmmm... Does that mean that VTVMs should only be used to test transistors?

OK, here's a complete non-sequitur triggered by my brain's tendency to
free associate ...

Seymour Cray was once asked what kind of computer he used to design the
original Cray supercomputer. His reply: "I used a #2 pencil and a
quadrille pad."

Some years go by, and he's being interviewed again. The interviewer
says, "Did you know that Apple bought a Cray supercomputer to help them
design their new Mac?"

"That's funny," Mr. Cray says, "I just bought a Mac to help me design my
new supercomputer."

That's one of my favorite stories.
Click to expand...
Good story. My first computer design (CPU board for a series of
devices), was done with a pencil & a 5mm square graph pad.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
 
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