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HP 5335A Timer / Counter - Anything i should know?
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tkamiya:
I must have a later motherboard than manual was based.  Would someone please confirm cream colored "thing" with one black band in middle is the jumper I'm supposed to remove when installing an oven oscillator? 

My Oven Osc says 10811 osc series 3010
What is series 3010?

I think this one came out of HP8568 spectrum analyzer.
Dr. Frank:

--- Quote from: tkamiya on February 17, 2019, 05:59:37 pm ---I must have a later motherboard than manual was based.  Would someone please confirm cream colored "thing" with one black band in middle is the jumper I'm supposed to remove when installing an oven oscillator? 

My Oven Osc says 10811 osc series 3010
What is series 3010?

I think this one came out of HP8568 spectrum analyzer.

--- End quote ---

Hello,
it's too dangerous to agree, based on your description (although I think I know what you mean).

Please have a look in either version of the manual, on page 2-4 it's described, that you need to remove jumper P/N 8159-0005, that is zero Ohm resistor W1, on board A4, so it's designated as A4W1 in the BOM. You'll also find that part in the schematics, and also on the board drawing, please just look one page ahead in this thread, reply #74, where 'sdwest' nicely described that modification.

All versions of the counter are identical around the XTAL circuit.

Your OCXO should probably be labelled 10811-60111; you'll find further info by google search on '10811 osc series 3010'
That type should work in the 5335A.

PS: I had a quick look on my spare OCXO, and yes, 3010 might be the manufacturing date, decoded to CW10 of 1990, if its serial number is something like 3010A01234
 The P/N anyhow, should be something like 10811-60xxx

Frank
tkamiya:
3010 is a mysterious designator.  On mine, there are two stickers and one says "upgraded to series 3010".  60*** is no where to be seen.  On web entries, there are mostly questions without answers.  I'm thinking it's a some kind of performance version of the whatever unit.

As to the jumper, on my photo, it's little higher than center left.  There are many photos on this board with one trimmer cap version but not two like mine.  I am unable to find a manual that matches mine.

I might install one and route it to Aux input.  That way, I can avoid modifying anything at all.
Dr. Frank:

--- Quote from: tkamiya on February 17, 2019, 10:24:47 pm ---3010 is a mysterious designator.  On mine, there are two stickers and one says "upgraded to series 3010".  60*** is no where to be seen.  On web entries, there are mostly questions without answers.  I'm thinking it's a some kind of performance version of the whatever unit.

As to the jumper, on my photo, it's little higher than center left.  There are many photos on this board with one trimmer cap version but not two like mine.  I am unable to find a manual that matches mine.

I might install one and route it to Aux input.  That way, I can avoid modifying anything at all.

--- End quote ---

Maybe you post a picture of your unit, of the face plate, and of the connector.

All manuals which I know and possess (5335A-90005, 5335A-90021, and 5335A-90044) match exactly your PCB area, and W1 is also clearly visible.

The drawing on the previous page in this thread (#74) also clearly indicates what has to be done, and that matches exactly your PCB, maybe apart from additional C53 cap trimmer, which is visible in manual -90044 .  :-// :-// :-//



Frank

PS: here are the -90044 schematic and PCB drawing:

tkamiya:
Dr. Frank?  That's not what I am asking....  I was asking about the jumper to remove.  I posted a photo around that area with what I believe to be a fairly clear description.  You'll see that part is slightly different.

Can you help me with that?

You said W1 is CLEARLY visible.  I think so too.  When I asked for confirmation, you told me to be careful and refereed me to a manual.  That's when I got concerned.
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