[time-nuts] HP 5245L counter

[jmfranke]

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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