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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
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]
regards,
Matthias
On Dienstag, 12. Mai 2020 11:03:02 CEST tim...@timeok.it wrote:
>Hi everyone,
>
>
Am 12.05.20 um 11:03 schrieb tim...@timeok.it:
Bourns 3700S-196-1004
A short search leads to
<
https://www.mouser.de/ProductDetail/Bourns/3700S-1-103?qs=Ce8Nk3DxA0Ci0Gcap53qHg==
>
which says that that the base type is EOL-ed (end of product life).
The data sheet has no 100K version
In message <9091080.ron9qtr...@linux-5fgm.suse>, Matthias Welwarsky writes:
>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]
And the obvious fol
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 j
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
tim...
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
tim...@timeok.it
www.timeok.it
Da "Matthias Welwarsky" time-n...@welwarsky.de
I made a mistake on the product nr.
The correct value is 100k so the pn is 3700S-196-104
As Matthias suggest I have placed a samples request directly to Bourns.
https://www.bourns.com/support/request-samples
Luciano
Luciano P. S. Paramithiotti
tim...@timeok.it
www.ti
Luciano
A suggestion. When you obtain the new pots at least obtain some high
temperature epoxy and fix the problem ahead of time. A small amount should
help.
This may be difficult but I also find calling helps get samples. Though
today the chance of someone picking up a phone seems to be negative.
Search time-nuts for this discussion. Much information and unfortunately
not possible.
Regards
On Tue, May 12, 2020 at 4:53 AM LiAng wrote:
>
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> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mai
Hi
A couple other options:
1) Adapt something like a 3540 series part
2) Redo the circuit to use a 10K.
Bob
> On May 12, 2020, at 7:16 AM, tim...@timeok.it wrote:
>
>
> I made a mistake on the product nr.
>
> The correct value is 100k so the pn is 3700S-196-104
>
> As Matthias sugge
OK its a reverse mini 9 pin. It will be expensive I suspect as its mil.
Or just find some pins stick them in with wires for temp.
If the cover can be removed potentially much more insight can be gained.
Given at this point they are worthless. No harm or foul in diving in.
Potentially you can at lea
Attached are a couple of pictures of these curious oscillators. As there are
no mounting holes to secure these, I assume they were held in a clamping
arrangement.There appears to be a threaded thermometer well in the front and a
frequency adjustment in the rear under a cap screw.
The power/co
Hello,
Yes, this is a micro-D 9 pin female, usually quite expensive although
for 9-pin, there are some lower-cost parts available:
https://www.digikey.es/product-detail/es/norcomp-inc/380-009-113L001/NOR1142-ND/2798595
shall mate the one in the oscillator
Best regards,
Javier, EA1CRB
O
Does anyone know of a ready made board that will allow me to mount and at the
least, minimally support the operation of an MV89A oscillator. I have one which
I've powered up deadbug style and would like to clean up the mess a little.
Thanks
Wes N7WS
__
On 5/12/20 10:18 AM, paul swed wrote:
OK its a reverse mini 9 pin. It will be expensive I suspect as its mil.
Or just find some pins stick them in with wires for temp.
Is it a MicroD? There are some inexpensive plastic connectors that are
compatible (I can't remember the part number, but if th
On 5/12/20 10:22 AM, Bruce Hunter via time-nuts wrote:
Attached are a couple of pictures of these curious oscillators. As there are
no mounting holes to secure these, I assume they were held in a clamping
arrangement.There appears to be a threaded thermometer well in the front and a
frequency
Hi
In this era of $5 for 10 boards from China, a lot of folks have laid out various
boards. They aren’t “ready made” but they get past the dead bug stuff.
Bob
> On May 12, 2020, at 1:52 PM, Wes wrote:
>
> Does anyone know of a ready made board that will allow me to mount and at the
> least,
Potted! That just makes the challenge all the more interesting. Chip and
rip carefully. It depends on the potting but they tend to flake off
sometimes in nice chunks. The really hard stuff is no fun but can be done.
On Tue, May 12, 2020 at 2:09 PM jimlux wrote:
> On 5/12/20 10:22 AM, Bruce Hunte
This may be heresy, but there are a lot of
them over on that auction site.
73, Dick, W1KSZ
On Tue, May 12, 2020 at 11:09 AM jimlux wrote:
> On 5/12/20 10:22 AM, Bruce Hunter via time-nuts wrote:
> > Attached are a couple of pictures of these curious oscillators. As
> there are no mounting hole
The following article just came out. It's not deep, but it's a quick,
readable overview that you can share with friends that wonder why
timekeeping is so interesting. I agree with reader comments that John
"Longitude" Harrison was a major omission.
"Arrows of Time: A project by Quanta Magazine
And Dicke was done out of a Nobel because his antenna was too small.
He's the one who told P&W what they were measuring. That is, after the
pigeon poop had been cleaned out of the horn...
D
On 2020-05-12 16:22, Tom Van Baak wrote:
The following article just came out. It's not deep, but it's a q
Does anyone know about Alfred Loomis and his
early precision time measurements?
According to the article in the link below, he
was also involved in WWII radar and the creation of Loran.
http://www.ob-ultrasound.net/loomis.html
bob
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time-nuts maili
Check out "Tuxedo Park" by Jennet Conant -- it's all about Loomis and
his very interesting life.
John
On 5/12/20 7:24 PM, Bob Martin wrote:
> Does anyone know about Alfred Loomis and his
> early precision time measurements?
>
> According to the article in the link below, he
> was also invol
Well I probed the connector pins and learned enough to operate these
oscillators. At +10 V input , the input current ceased increasing. Output was
10 MHz. As a fellow list member offered, these are apparently ruggedized
oscillators, designed to minimize phase noise under vibration conditions
Yes, the book about Loomis by Jennet Conant is highly recommended. The
"time nut" pages are here:
http://leapsecond.com/pages/loomis/Loomis-Tuxedo-Conant-p66-p70.pdf
Besides being the man behind LORAN, and a hundred other clever ideas, he
also pushed the state of the art in timekeeping, compar
Wes,
Here are a few links that should get you started in the right direction.
[ http://pe9ghz.org/cmsms/index.php?page=gpsd |
http://pe9ghz.org/cmsms/index.php?page=gpsd ]
[ https://easyeda.com/vr2wwp/Temp-b69e1159c6e04e98a45d2de8cb413c79 |
https://easyeda.com/vr2wwp/Temp-b69e1159c6e04e98a45d2
You can watch the PBS American Experience program on him, "The Secret of
Tuxedo Park" here:
http://www.pbs.org/wgbh/americanexperience/films/secret-tuxedo-park/#part01
David N1HAC
On 5/12/20 7:56 PM, Tom Van Baak wrote:
Yes, the book about Loomis by Jennet Conant is highly recommended. The
"t
In message , Tom Van Baak
writes:
>Besides being the man behind LORAN, and a hundred other clever ideas, he
>also pushed the state of the art in timekeeping, comparing the world's
>best pendulum clocks against the best quartz clocks:
While was instrumental in many ways for LORAN, call
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