[time-nuts] HP 5300B - HP 5308A Counter Time Base Question...

Bob Camp kb8tq at n1k.org
Sat Nov 1 15:48:52 EDT 2014


4.5 Hz at 1 MHz is 4.5 ppm. That’s not out of the likely adjustment range on the basic crystal reference on a 5308. It’s probably a simple tweak to get it back into calibration. 


> On Nov 1, 2014, at 3:19 PM, Burt I. Weiner <biwa at att.net> wrote:
> I was recently given a HP-5300B / 5308A counter. I thought it might be handy when I'm at an AM broadcast transmitter and needed to make "rough" frequency measurements.  It turns out that at 1000 kHz it reads about 4.5 Hz high. Looking inside I'm not sure if there's a time base adjustment.  I looked at the on-line manuals available and I don't find any reference to adjusting the time base frequency.  Does anyone here know anything about these counters?  Is there a schematic available?  I'm not looking for precision, but 4.5 Hz at 1 MHz seems a tad much.
> Burt, K6OQK
> Burt I. Weiner Associates
> Broadcast Technical Services
> Glendale, California  U.S.A.
> biwa at att.net
> www.biwa.cc
> K6OQK 
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