[time-nuts] HP 5245L counter

[Steve Rooke]

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.

Steve

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
>> more...
>>
>> I also put a 5245L manual up at Ken's site :
>> http://www.kennethkuhn.com/hpmuseum/   - -
>> http://www.kennethkuhn.com/hpmuseum/scans/
>>
>> 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
>>> this
>>> beast to death.
>>>
>>> Its looking pretty good at this point, though I do have several nixies
>>> that
>>> are troubled.
>>> Regards
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>>>
>>
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>
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-- 
Steve Rooke - ZL3TUV & G8KVD
A man with one clock knows what time it is;
A man with two clocks is never quite sure.