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Marv @ Home

Sat, Aug 10, 2013 9:57 PM

A 6.5 or better will find a good home and be appreciated in your lab,
Joe. Many orphans need homes always appear on eBay, particularly the
top line of its day HPs: 3455a, 3456a, and 3457a.

There is a lot of discussion on the pros and cons of each throughout
the archives, but any will be an order of magnitude better than the 5.5 digit.

At 02:33 PM 8/10/2013, Joseph Gray wrote:

Oops. It was getting late and I guess my fingers typed the wrong digit :-).

Yes, I was thinking about getting a better DMM.

Joe Gray
W5JG

Sincerely,

Marv
Philadelphia, PA

A 6.5 or better will find a good home and be appreciated in your lab, Joe. Many orphans need homes always appear on eBay, particularly the top line of its day HPs: 3455a, 3456a, and 3457a. There is a lot of discussion on the pros and cons of each throughout the archives, but any will be an order of magnitude better than the 5.5 digit. At 02:33 PM 8/10/2013, Joseph Gray wrote: >Oops. It was getting late and I guess my fingers typed the wrong digit :-). > >Yes, I was thinking about getting a better DMM. > >Joe Gray >W5JG Sincerely, Marv Philadelphia, PA

BS

Bob Smither

Sat, Aug 10, 2013 10:49 PM

On 08/10/2013 04:57 PM, Marv @ Home wrote:

A 6.5 or better will find a good home and be appreciated in your lab, Joe.
Many orphans need homes always appear on eBay, particularly the top line of
its day HPs: 3455a, 3456a, and 3457a.

Agreed! I bought a 3455A when it was new. It was a workhorse in my lab for
years, then it sat on the shelf for a few years. When I fired it up a tantalum
cap smoked. Replacing that had it running again. After a few months, a RAM
chip went out, after replacing it another error surfaced that I have not tracked
down.

Since fighting the 3455A, I have purchased three 3457As on Ebay. They are
always on and I have had no problems with them. They are my current favorite
DMMs. All three indicate within a few ppm at +10.00000 volts (I have not
adjusted / calibrated them).

I think HP got a lot right with the 3457A. Wish I could afford a 3458A!

--
Bob Smither, PhD Circuit Concepts, Inc.

---=======
Government is not healthy for children and other living things.
-- Jeff Daiell

---=======
Smither@C-C-I.Com http://www.C-C-I.Com 281-331-2744(office) -4616(fax)

On 08/10/2013 04:57 PM, Marv @ Home wrote: > A 6.5 or better will find a good home and be appreciated in your lab, Joe. > Many orphans need homes always appear on eBay, particularly the top line of > its day HPs: 3455a, 3456a, and 3457a. Agreed! I bought a 3455A when it was new. It was a workhorse in my lab for years, then it sat on the shelf for a few years. When I fired it up a tantalum cap smoked. Replacing that had it running again. After a few months, a RAM chip went out, after replacing it another error surfaced that I have not tracked down. Since fighting the 3455A, I have purchased three 3457As on Ebay. They are always on and I have had no problems with them. They are my current favorite DMMs. All three indicate within a few ppm at +10.00000 volts (I have not adjusted / calibrated them). I think HP got a lot right with the 3457A. Wish I could afford a 3458A! -- Bob Smither, PhD Circuit Concepts, Inc. ========================================================================= Government is not healthy for children and other living things. -- Jeff Daiell ========================================================================= Smither@C-C-I.Com http://www.C-C-I.Com 281-331-2744(office) -4616(fax)

DJ

Didier Juges

Sun, Aug 11, 2013 1:52 AM

That is not completely true. The HP3456A has a full scale of 1,100,000 compared to the HP3478A's 300,000
Not quite an order of magnitude.
I have both and while the display is not always visible, particularly in dim light, I like the smaller size and quiet operation of the HP3478A compared to the HP3456A. When the better specs (on paper) of the HP3456A are not absolutely needed, the HP3478A is a fine bench meter.

Didier KO4BB

"Marv @ Home" marvin.gozum@comcast.net wrote:

A 6.5 or better will find a good home and be appreciated in your lab,
Joe. Many orphans need homes always appear on eBay, particularly the
top line of its day HPs: 3455a, 3456a, and 3457a.

There is a lot of discussion on the pros and cons of each throughout
the archives, but any will be an order of magnitude better than the 5.5
digit.

At 02:33 PM 8/10/2013, Joseph Gray wrote:

Oops. It was getting late and I guess my fingers typed the wrong digit

:-).

Yes, I was thinking about getting a better DMM.

Joe Gray
W5JG

Sincerely,

Marv
Philadelphia, PA

volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.

--
Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things.

That is not completely true. The HP3456A has a full scale of 1,100,000 compared to the HP3478A's 300,000 Not quite an order of magnitude. I have both and while the display is not always visible, particularly in dim light, I like the smaller size and quiet operation of the HP3478A compared to the HP3456A. When the better specs (on paper) of the HP3456A are not absolutely needed, the HP3478A is a fine bench meter. Didier KO4BB "Marv @ Home" <marvin.gozum@comcast.net> wrote: >A 6.5 or better will find a good home and be appreciated in your lab, >Joe. Many orphans need homes always appear on eBay, particularly the >top line of its day HPs: 3455a, 3456a, and 3457a. > >There is a lot of discussion on the pros and cons of each throughout >the archives, but any will be an order of magnitude better than the 5.5 >digit. > > >At 02:33 PM 8/10/2013, Joseph Gray wrote: >>Oops. It was getting late and I guess my fingers typed the wrong digit >:-). >> >>Yes, I was thinking about getting a better DMM. >> >>Joe Gray >>W5JG > > > >Sincerely, > > > >Marv >Philadelphia, PA > >_______________________________________________ >volt-nuts mailing list -- volt-nuts@febo.com >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things.

R

R.Phillips

Sun, Aug 11, 2013 11:03 AM

Didier
I would agree generally with your remarks ref. the 34578A and the 3456A, I
have both, but more recently I have acquired a Keithley 2015 which I guess
is more in keeping with the 3478A, but with a fluorescent display, this is a
very nice instrument to use, and is currently being sold in considerable
numbers having been used by the 'mobile 'phone industry for its distortion
measuring ability, the one I have was cal'd in 2009 - - I would be
interested to hear from any other users.
regards
Roy P

-----Original Message-----
From: Didier Juges
Sent: Sunday, August 11, 2013 2:52 AM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Fluke 510A

That is not completely true. The HP3456A has a full scale of 1,100,000
compared to the HP3478A's 300,000
Not quite an order of magnitude.
I have both and while the display is not always visible, particularly in dim
light, I like the smaller size and quiet operation of the HP3478A compared
to the HP3456A. When the better specs (on paper) of the HP3456A are not
absolutely needed, the HP3478A is a fine bench meter.

Didier KO4BB

"Marv @ Home" marvin.gozum@comcast.net wrote:

A 6.5 or better will find a good home and be appreciated in your lab,
Joe. Many orphans need homes always appear on eBay, particularly the
top line of its day HPs: 3455a, 3456a, and 3457a.

There is a lot of discussion on the pros and cons of each throughout
the archives, but any will be an order of magnitude better than the 5.5
digit.

At 02:33 PM 8/10/2013, Joseph Gray wrote:

Oops. It was getting late and I guess my fingers typed the wrong digit

:-).

Yes, I was thinking about getting a better DMM.

Joe Gray
W5JG

Sincerely,

Marv
Philadelphia, PA

volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.

--
Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other
things.

volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.

Didier I would agree generally with your remarks ref. the 34578A and the 3456A, I have both, but more recently I have acquired a Keithley 2015 which I guess is more in keeping with the 3478A, but with a fluorescent display, this is a very nice instrument to use, and is currently being sold in considerable numbers having been used by the 'mobile 'phone industry for its distortion measuring ability, the one I have was cal'd in 2009 - - I would be interested to hear from any other users. regards Roy P -----Original Message----- From: Didier Juges Sent: Sunday, August 11, 2013 2:52 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Fluke 510A That is not completely true. The HP3456A has a full scale of 1,100,000 compared to the HP3478A's 300,000 Not quite an order of magnitude. I have both and while the display is not always visible, particularly in dim light, I like the smaller size and quiet operation of the HP3478A compared to the HP3456A. When the better specs (on paper) of the HP3456A are not absolutely needed, the HP3478A is a fine bench meter. Didier KO4BB "Marv @ Home" <marvin.gozum@comcast.net> wrote: >A 6.5 or better will find a good home and be appreciated in your lab, >Joe. Many orphans need homes always appear on eBay, particularly the >top line of its day HPs: 3455a, 3456a, and 3457a. > >There is a lot of discussion on the pros and cons of each throughout >the archives, but any will be an order of magnitude better than the 5.5 >digit. > > >At 02:33 PM 8/10/2013, Joseph Gray wrote: >>Oops. It was getting late and I guess my fingers typed the wrong digit >:-). >> >>Yes, I was thinking about getting a better DMM. >> >>Joe Gray >>W5JG > > > >Sincerely, > > > >Marv >Philadelphia, PA > >_______________________________________________ >volt-nuts mailing list -- volt-nuts@febo.com >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.

volt-nuts@lists.febo.com

Re: [volt-nuts] Fluke 510A