[time-nuts] HP 5245L counter
sar10538 at gmail.com
Sat Jan 9 08:13:34 UTC 2010
I've always had the idea that I wanted to build a programmable
oscillator that would change in frequency in time with the time, IE.
2112.55 for instance. I could then connect that to my Nixie counter,
or any counter for that matter, and have a cool clock.
2010/1/9 jmfranke <jmfranke at cox.net>:
> I have a couple 5233 counters and I still use them.
> I use two Nixie tubes to display seconds from 1PPS signal from a GPS
> receiver. The one pulse per minute output from the Nixie display drives a
> 1930's slave or impulse clock.
> John WA4WDL
> From: "Brian Kirby" <kilodelta4foxmike at gmail.com>
> Sent: Friday, January 08, 2010 10:34 PM
> To: "Discussion of precise time and frequency measurement"
> <time-nuts at febo.com>
> Subject: Re: [time-nuts] HP 5245L counter
>> 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. Extra
>> shielding for EMI/RFI testing.
>> I have the standard 5253B 50-500 Mhz plug in, the 5262A Time Interval plug
>> in, a 5257A Transfer Oscillator plug in, a 5265A Digital Voltmeter plug in,
>> and a 5254A 300 Mhz to 3 Ghz plug in. And I look at every hamfest for
>> I also put a 5245L manual up at Ken's site :
>> http://www.kennethkuhn.com/hpmuseum/ - -
>> 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 the transistor rusted/rotted off.
>>> That was most of the issues. Aside from the fact someone really hacked
>>> beast to death.
>>> Its looking pretty good at this point, though I do have several nixies
>>> are troubled.
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> and follow the instructions there.
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> and follow the instructions there.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
Steve Rooke - ZL3TUV & G8KVD
A man with one clock knows what time it is;
A man with two clocks is never quite sure.
More information about the time-nuts