[time-nuts] FS HP 5335A

[Tom Holmes]

HI Bob...

Thanks for the tip. Have been down that road with this one and it didn't fix it. I think someone may have deliberately disabled the internal timebase to prevent users from having anything but the house standard in play. 

Tom Holmes, N8ZM

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Stewart
Sent: Tuesday, May 17, 2016 7:08 PM
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Subject: Re: [time-nuts] FS HP 5335A

Hi,

I know this is a for sale post, but there's a jumper that needs to be there to work with the regulator oscillator.  Page 2-4 of the Operating and Service Manual (05335-90021) details the instructions for installing the Option 010, the 10811 OCXO.  Instruction "c" is below.  You'd need to add the jumper back in.  The factory jumper looks like a resistor.  It may simply be cut with side cutters on your unit.  You can use just a piece of wire, of course.

"c. Remove electrical lead (jumper), PIN 8159-0005, that connects A4U1B(6) and U2B(6)."

Bob
--------------------------------------------
On Tue, 5/17/16, Tom Holmes <tholmes at woh.rr.com> wrote:

 Subject: [time-nuts] FS HP 5335A
 To: "'Discussion of precise time and frequency measurement'" <time-nuts at febo.com>
 Date: Tuesday, May 17, 2016, 4:38 PM
 
 For some reason it did not have an
 internal timebase when I got it, and
 throws an error, UNLESS you have an external 10 MHz
 connected before you
 turn it on. Then it works fine.
 
  
 
 Please contact off list for details,
 
  
 
 AND if you happen to be in Dayton, OH, this weekend for a
 little ham radio
 swap fest with a mere 25,000 people attending, no shipping
 required. 
 
  
 
 AND there will be at least a few known time-nuts in town if
 anyone wants to
 meet up. Make yourself known to John at the TAPR booth.
 
  
 
 Tom Holmes, N8ZM
 
  
 
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