Dear Don,
Good morning. Like probably many others, owning or collecting nice
pieces of equipment probably drove me to consider an HP unit, instead
of wisely doing some research on more specific and technically
feasible options. The search is only beginning. Your advise is
welcome. Thank you.
Best regards,
Edgardo Molina
XE1XUS
On Jun 30, 2012, at 3:05 AM, Don Latham wrote:
Edgardo: For the asking price, you can do a LOT better than this Hp.
There will be more opinions from more knowledgeable time-nuts
regarding
your choices, I would consider them carefully. Again, you do not
need to
spend anything like $1k US to get what you need.
Don
Edgardo Molina
Dear Group,
Good morning. I wish you well. This is my first post to the Time-Nuts
group. Please be gentle with the newbie ;)
I have been offered an HP 5065a Rubidium Frequency Standard recently
in what I feel, a bad operational condition. I need a reliable
rubidium standard for my time/frequency experiments, still I am in
doubt to invest in buying such and old beast. The general situation
of
the instrument (for what I have been able to see from the first
inspection) is:
100 Khz output: Not working, noise coming out of it.
1Mhz output: Working, sine wave clean and not distorted, a couple of
frequency meters showing 1.0000030 Mhz in frequency, the oscilloscope
shows a transient pulse on top of the sine wave signal and affecting
the frequency readout instantly and then returning to the value
previously mentioned. Last digits vary sporadically.
5Mhz output: Working. sine wave clean but a little bit distorted when
ramping up. A couple of frequency counters showing 5.0000014 Mhz in
frequency. No transient pulses or other glitches around the output
signal. Last digits vary sporadically.
No lights coming up when the instrument turned on. No physical damage
of abuse on case or internal components. No options installed . A
couple of electrolytic caps replaced on some boards, no trace of
burnt
PCB traces or visible damage to electronic components or physics
package. Haven't got the manual until today and was unable to check
on
the front panel voltages to check on general health. As turning the
voltage test selector knob, voltage is shown for most positions,
except of course battery and the 100 Khz oscillator output. Some
voltage test positions get the instrument needle to go full scale and
out of range, other appear to be within scale.
I can perform a second visual and operational inspection today, this
time with a copy of the instrument manual. I will take my own trusted
frequency counter and portable digital storage oscilloscope. Would
really appreciate if I could receive comments from you experts to
evaluate if such a unit could be worth buying. The asking price is
$1K
USD. Should I consider it an instrument that can be repaired and
serviced to show some decent performance? Or should I look somewhere
else to get a decent rubidium frequency standard.
Thank you beforehand for all your kind and expert comments.
Respectfully,
Edgardo Molina
Mexico City, Mexico
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--
"Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind."
R. Bacon
"If you don't know what it is, don't poke it."
Ghost in the Shell
Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com
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