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From: Brian Kirby kilodelta4foxm...@gmail.com
Sent: Friday, January 08, 2010 10:34 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] HP 5245L counter
I have two fully operational HP5245L. There is something satisfying about
the glow
David Forbes wrote:
[...]
Coincidence of the day. I spent the other evening in a vain attempt to
get more sensitivity out of my 5245L so that it would respond more
reliably to the tiny 32kHz signal on my nixie wristwatch oscillator.
I'll be tuning up a lot of them in the coming weeks.
I
Hi
Back in the 60's and early 70's it was fairly common to wave solder a board
and then saw off the extra leads hanging through the pc board. The result was
that the core of the lead is exposed to the air. Just about all the leads on
components of the era have enough iron in them to rust.
actually in
instruments still partly attached to the ICs.
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bob Camp
Sent: 09 January 2010 15:00
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5245L
At 9:59 AM -0500 1/9/10, Gary Chatters wrote:
The 5261A Video Amplifier plug in will get the sensitivity down to 1 mv.
The 5258A Sensitive Prescaler will also get the sensitivity down to
the 1 mv range as well as extend the upper frequency range to 200MHz.
Gary
Gary,
Thanks for the
Very very interesting read on hollow leads. Like you I also had spares in
the conductive foam and learned the same thing. Very bad indeed.
I do need to look at several of the decoders to nixies they are acting
strange and would easily guess that the neon bulb logic has some flaky
bulbs. I started
and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] HP 5245L counter circa 1967 humor
Very very interesting read on hollow leads. Like you I also had spares in
the conductive foam and learned the same thing. Very bad indeed.
I do need to look at several of the decoders to nixies
At 12:29 PM -0500 1/9/10, paul swed wrote:
I do need to look at several of the decoders to nixies they are acting
strange and would easily guess that the neon bulb logic has some flaky
bulbs. I started opening that section up and stopped. Its going to be a fair
job. It will be really curious how
:29 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] HP 5245L counter circa 1967 humor
Very very interesting read on hollow leads. Like you I also had spares in
the conductive foam and learned the same thing. Very bad indeed.
I do need
Hello to the group.
For whatever reason I have resurrected a 1967 HP 5245L counter. Indeed I
have many newer units.
But there is something about that nixie tube glow.
Anyhow as good as HP is, I found interesting failures. Infact simply the
gold leads on the transistor rusted/rotted off.
That was
I have two fully operational HP5245L. There is something satisfying
about the glow of Nixie Tubes. And the kids like to see it counting if
you take it out of the storage mode. I also have a complete set of
spare boards - and they are not available. One of the units I have is
H48 spec.
I bought a brand new 5245 for my lab at work in about 1967. It was really
the cat's meow! I also had the parallel printer.
-John
I have two fully operational HP5245L. There is something satisfying
about the glow of Nixie Tubes. And the kids like to see it counting if
you take
--
From: Brian Kirby kilodelta4foxm...@gmail.com
Sent: Friday, January 08, 2010 10:34 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] HP 5245L counter
I have two fully operational HP5245L. There is something satisfying about
the glow of Nixie
At 9:27 PM -0500 1/8/10, paul swed wrote:
Hello to the group.
For whatever reason I have resurrected a 1967 HP 5245L counter. Indeed I
have many newer units.
But there is something about that nixie tube glow.
Anyhow as good as HP is, I found interesting failures. Infact simply the
gold leads on
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