I forgot to mention that it is important to glue the plastic tube to the nozzle otherwise the pressure will send the whole assembly including needle across the room. I used a plumbers PVC adhesive.
Dick
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--- In hp_agilent_equipment@..., "tcxo" <tcxoe@...> wrote:
Interesting and informational!
Thanks,
Greg
----- Original Message -----
From: ferrymanr
To: hp_agilent_equipment@...
Sent: Monday, August 29, 2011 12:42 PM
Subject: [hp_agilent_equipment] Re: 8558B centre frequency wildly unstable above 1250MHz
I have a customised nozzle for my aerosol can of contact fluid. I still have the supplied 10cm length of tube but have fitted a hypodermic needle to the end. This allows me to get a little fluid into awkward places without spraying everything else. A careful inspection of the 10 turn potentiometer with a watchmakers lens showed that there is a tiny gap to the side of ech end connnection. I squirted it in there. The Bourns potentiometer fitted and many others have the rear cover held on with metal clips but I did not want to release these in case the whole thing came apart. That little dribble that got in did the trick.
Dick
