[time-nuts] Bourns for fine frequency tuning

[timeok at timeok.it]

   Hi,

   good suggestion, I have seen the form for requesting samples.

   I will also try this path. In any case, if someone had to sell, let me know directly.

   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
   Cc timeok at timeok.it
   Data Tue, 12 May 2020 11:31:39 +0200
   Oggetto Re: [time-nuts] Bourns for fine frequency tuning
   On Dienstag, 12. Mai 2020 11:24:39 CEST Matthias Welwarsky wrote:
   > 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[1]
   >

   Sorry for the broken link, but just search Mouser for "3700S-1-104L" and it
   will show up. Unfortunately, it's a "non-stock" item, but maybe you can get a
   sample directly from Bourns?

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