[time-nuts] Bourns for fine frequency tuning

[timeok at timeok.it]

   Thanks Matthias,

   Mouser and Digikey have in catalog but not in stock the 100K version.

   The 100k value for them is not required enough and they suggest that they could have them but only if the order is for a large number of pieces.

   Luciano

   Luciano P. S. Paramithiotti
   timeok at timeok.it
   www.timeok.it

   Da "Matthias Welwarsky" time-nuts at welwarsky.de
   A time-nuts at lists.febo.com, timeok at timeok.it
   Cc
   Data Tue, 12 May 2020 11:24:39 +0200
   Oggetto Re: [time-nuts] Bourns for fine frequency tuning

   Hi,


   The Bourns 3700S series is still available, a 100k Ohm part is this:

   https://www.mouser.de/ProductDetail/Bourns/3700S-1-104L?qs=%2Fha2pyFadujnek9uGXX64FiPDt0iEW4%2F27z9APd4XbI%3D


   regards,

   Matthias


   On Dienstag, 12. Mai 2020 11:03:02 CEST timeok at timeok.it wrote:

   > Hi everyone,

   >

   > I need your help to find a particular Bourns potentiometer that many

   > frequency standard company use for frequency fine tuning in their

   > oscillators. In my experience, both HP in 107BR and Frequency Electronics

   > in the AN URQ-23 use this potentiometer which has a value of 100k Ohm.

   >

   > Unfortunately I can't replace it with other models and by doing some

   > research I found some but at most with a resistance of 10K Ohm. I need two

   > pieces, but if I find more, I would keep them in reserve. The problem with

   > these multiturns is that the back cover comes off and no longer work. Some

   > can be glued again, others are damaged internally in the cursor because the

   > operator insisted trying to force the spindle. In the case of the HP107BR

   > the potentiometer is installed in the external oven and the temperature has

   > accentuated the gluing problem. In this regard, suggestions on which glue

   > can be used for high temperatures are welcome.

   >

   > The model is: Bourns 3700S-196-1004

   >

   > thanks,

   >

   > Luciano

   >

   > Luciano P. S. Paramithiotti

   > timeok at timeok.it

   > www.timeok.it

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