[time-nuts] HP-5065a bought and finally working!

EWKehren at aol.com EWKehren at aol.com
Fri Aug 24 16:20:55 EDT 2012


Edgardo
If you need a Shera board and parts I still have some extras. Contact me  
off list.
Bert
 
 
In a message dated 8/24/2012 4:05:08 P.M. Eastern Daylight Time,  
xe1xus at amsat.org writes:

Dear  Bert,

Thank you for your always expert advise. I am receiving an HP  105B next 
week and for sure I will be doing some disciplining with the  Thunderbolt. I 
just started to gather operational information on the 5065a to  start a 
record. I also have been reading about those methods and also going  deeper with 
your information.

Cheers!



Edgardo  Molina
Dirección IPTEL

www.iptel.net.mx

T : 55 55  55202444
M : 04455 20501854

Piensa en Bits SA de  CV



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On Aug 22, 2012, at 4:18 PM, EWKehren at aol.com  wrote:

> You can discipline a HP 5065A easily using a Shera with  the  Tbolt  1 
PPS 
> and a LTC 1655 DAC in stead of an AD  1861.
> Bert Kehren.
> 
> 
> In a message dated  8/22/2012 8:23:06 A.M. Eastern Daylight Time,  
> jltran at att.net  writes:
> 
> Edgardo,
> 
> Congrats on getting the  5065A up and  operational.  Make sure the A11 
Board
>  (Temperature Controller) is all  OK.  Failure there can destroy the  A12 
RVFR
> Assembly.  There is a  lot of 'expertise' on the  list for this unit.
> 
> What is the serial number  of your  unit and what is the part number of 
the
> manual you have?
>  
> I  have a couple of manuals and I may also have the 'change  sheets'  that
> updates the manual to your serial number.  It  may take me a while  to 
chase
> that down but if I have the 'change  sheets', I can scan them and  send 
them
> to you.
> 
>  I have not heard of anyone 'disciplining' the  5065A by GPS, other than  
by
> hand from week to week.  However, the 105B  has a built  in connection on 
the
> back that is great for that purpose   (negative slope, as I recall) and I 
> have
> done that using a  Brooks Shera  controller board and the 1 PPS from my 
>  TBolt.
> It works quite  well.
> 
> Joe
>  
> -----Original Message-----
> From:   time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>  Behalf Of  Edgardo Molina
> Sent: Wednesday, August 22, 2012 12:22  AM
> To:  time-nuts at febo.com
> Subject: [time-nuts] HP-5065a  bought and finally  working!
> 
> 
> Dear  Group,
> 
> I wish you well.
> 
> Do you recall  a  message and thread about a month ago with my concerns 
about
>  buying a used /  unknown condition HP-5065a rubidium frequency standard? 
 I
> bit the bullet  and bought it. Almost mint condition  (cosmetically 
speaking)
> and with  several operational issues.  
> 
> Well, It took me several weeks to put it  back to work.  Several 
capacitors 
> on
> several boards along with a couple  of  transistors and an IC were 
replaced.
> After that any being  bored by the  yellow light, it finally came off to 
> allow
>  a beautiful green lock condition  light. I went through the necessary  
steps
> to tune it and calibrate it. Now,  as I have been told  recently. "You 
have
> been bitten by the Time Nuts bug."  I am not  complaining at all.
> 
> Now the technical issues if you  kindly  allow:
> 
> a. Does anybody have an HP-5065a manual  for the latest versions?  Mine 
> (which
> I downloaded from  the Internet) is intended for earlier  versions. It 
seems 
>  I
> have one of the last produced units. I would kindly  appreciate  any help 
on
> this and I am willing to pay for time and expenses   to anybody who could
> help. During the repair process I found  several  differences in the 
earlier
> versions design and had to  figure out hoy mine  works.
> 
> b. Is it possible to build a  GPSDRb? I would like to know if it  is
> reasonable to pursue the  goal to discipline the 5065a with a TB which I  
> also
> got  recently. 
> 
> c. I am waiting for the delivery of a recent   purchase. An HP-59309a 
Digital
> Clock to go with the HP 5065a. How I  wish I  could find the optional LED
> integrated optional clock and  1PPS output. Is  my purchase a good match 
for
> the 5065a? Any  other suggestions to drive a  clock?
> 
> d. I am waiting  also for de delivery of an HP-105b mint  condition quartz
>  frequency standard. Would a second 59309a make sense to  use it with  
this
> quartz standard? Or just saving it for a Cesium? Anybody   willing to 
sell a
> spare, dust gathering, clean unit to me?
>  
> e. Any  suggestions for software of lab equipment to measure my  
experiments
> like  AD, jitter, phase comparisons, etc?
>  
> 
> While I wait I am doing some  experiments with a FE Rb  standard to 
> discipline
> an Adret synthesiser to  output  32.768 KHz to directly drive a Nixie 
clock
> kit I just finished   building.
> 
> Your comments are surely welcome. Thank  you!
> 
> Kind  regards,
> 
> 
>  Edgardo  Molina
> XE1XUS
> Mexico
> 
> 
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