Pass-through 50 Ohm BNC terminators?...

[Jim MacArthur]

Does anyone have a secret source of BNC 50 Ohm pass-through (or in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT2944C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s a common problem in the video world -- but not 50 Ohm. We go through them by the dozens, and it adds up. We\'ve even made our own, but by the time you factor in labor, it\'s $40, like some sort of universal constant.
Thx,
Jim MacA

 

[Lasse Langwadt Christensen]

tirsdag den 22. september 2020 kl. 23.56.41 UTC+2 skrev Jim MacArthur:

Does anyone have a secret source of BNC 50 Ohm pass-through (or in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT2944C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s a common problem in the video world -- but not 50 Ohm. We go through them by the dozens, and it adds up. We\'ve even made our own, but by the time you factor in labor, it\'s $40, like some sort of universal constant.
Thx,
Jim MacA

how critical are they? here\'s 5 for ~$13

https://www.banggood.com/5-Pcs-Y1078-50-BNC-Male-To-Female-Plug-High-Frequency-Test-Socket-Oscilloscope-Probe-p-1568353.html

 

[Jim MacArthur]

On Tuesday, September 22, 2020 at 6:29:39 PM UTC-4, lang...@fonz.dk wrote:

tirsdag den 22. september 2020 kl. 23.56.41 UTC+2 skrev Jim MacArthur:
Does anyone have a secret source of BNC 50 Ohm pass-through (or in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT2944C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s a common problem in the video world -- but not 50 Ohm. We go through them by the dozens, and it adds up. We\'ve even made our own, but by the time you factor in labor, it\'s $40, like some sort of universal constant.
Thx,
Jim MacA
how critical are they? here\'s 5 for ~$13

https://www.banggood.com/5-Pcs-Y1078-50-BNC-Male-To-Female-Plug-High-Frequency-Test-Socket-Oscilloscope-Probe-p-1568353.html

Works for me. Thanks!

 

[John Larkin]

On Tue, 22 Sep 2020 14:56:34 -0700 (PDT), Jim MacArthur
<jimbmacarthur@gmail.com> wrote:

Does anyone have a secret source of BNC 50 Ohm pass-through (or in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT2944C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s a common problem in the video world -- but not 50 Ohm. We go through them by the dozens, and it adds up. We\'ve even made our own, but by the time you factor in labor, it\'s $40, like some sort of universal constant.
Thx,
Jim MacA

Try Amazon for \"50 ohm feed thru terminator\"

2 for $10, free shipping with Prime.

 

[John Doe]

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

Jim MacArthur <jimbmacarthur@gmail.com> wrote:

Does anyone have a secret source of BNC 50 Ohm pass-through (or
in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT29
44C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s
a common problem in the video world -- but not 50 Ohm. We go
through them by the dozens, and it adds up. We\'ve even made our
own, but by the time you factor in labor, it\'s $40, like some sort
of universal constant.

Try Amazon for \"50 ohm feed thru terminator\"

2 for $10, free shipping with Prime.

And probably free returns.

The middleman is everything when dealing with Communist Chinese
products. Like brand names, if you can find a brand-name product
nowadays.

 

[John Larkin]

On Wed, 23 Sep 2020 01:03:58 -0000 (UTC), John Doe
<always.look@message.header> wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

Jim MacArthur <jimbmacarthur@gmail.com> wrote:

Does anyone have a secret source of BNC 50 Ohm pass-through (or
in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT29
44C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s
a common problem in the video world -- but not 50 Ohm. We go
through them by the dozens, and it adds up. We\'ve even made our
own, but by the time you factor in labor, it\'s $40, like some sort
of universal constant.

Try Amazon for \"50 ohm feed thru terminator\"

2 for $10, free shipping with Prime.

And probably free returns.

The middleman is everything when dealing with Communist Chinese
products. Like brand names, if you can find a brand-name product
nowadays.

I\'ve been real happy with super-cheap SMA and SMB thru-hole and
edge-launch connectors from Amazon. I use them on breadboards, and we
buy better stuff for production.

Nice SMA and BNC cables, too. And scope probes.

 

[John Larkin]

On Tue, 22 Sep 2020 18:10:14 -0700, John Larkin
<jlarkin@highland_atwork_technology.com> wrote:

On Wed, 23 Sep 2020 01:03:58 -0000 (UTC), John Doe
always.look@message.header> wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

Jim MacArthur <jimbmacarthur@gmail.com> wrote:

Does anyone have a secret source of BNC 50 Ohm pass-through (or
in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT29
44C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s
a common problem in the video world -- but not 50 Ohm. We go
through them by the dozens, and it adds up. We\'ve even made our
own, but by the time you factor in labor, it\'s $40, like some sort
of universal constant.

Try Amazon for \"50 ohm feed thru terminator\"

2 for $10, free shipping with Prime.

And probably free returns.

The middleman is everything when dealing with Communist Chinese
products. Like brand names, if you can find a brand-name product
nowadays.

I\'ve been real happy with super-cheap SMA and SMB thru-hole and
edge-launch connectors from Amazon. I use them on breadboards, and we
buy better stuff for production.

Nice SMA and BNC cables, too. And scope probes.

And chocolate.

 

[John Doe]

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

I\'ve been real happy with super-cheap SMA and SMB thru-hole and
edge-launch connectors from Amazon.

And chocolate.

Dipped in caviar.

 

[Jeff Liebermann]

On Tue, 22 Sep 2020 14:56:34 -0700 (PDT), Jim MacArthur
<jimbmacarthur@gmail.com> wrote:

Does anyone have a secret source of BNC 50 Ohm pass-through (or in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT2944C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s a common problem in the video world -- but not 50 Ohm. We go through them by the dozens, and it adds up. We\'ve even made our own, but by the time you factor in labor, it\'s $40, like some sort of universal constant.
Thx,
Jim MacA

What is the highest operating frequency? How much power is it
expected to dissipate? If it\'s low frequency and low power, a BNC
T-connector and a common 50 ohm terminator should suffice. However,
if you want flat response into the GHz range, and/or high power
dissipation, it will be expensive. Or, you could take your chances
with a used termination from eBay.

50 ohm BNC feedthrough terminator:
<https://www.google.com/search?q=50+ohm+bnc+feed+through+terminator&tbm=isch>

BNC T-connector:
<https://www.google.com/search?q=bnc+t-connector&tbm=isch>

50 ohm BNC Terminator:
<https://www.google.com/search?q=50+ohm+bnc+terminator&tbm=isch>

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Jeff Liebermann]

On Tue, 22 Sep 2020 19:17:53 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

Or, just make your own 50 ohm BNC feed through terminators:
<https://www.eevblog.com/forum/projects/home-made-feed-through-terminator-for-bnc/>


--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[server]

On Tue, 22 Sep 2020 19:17:53 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

On Tue, 22 Sep 2020 14:56:34 -0700 (PDT), Jim MacArthur
jimbmacarthur@gmail.com> wrote:

Does anyone have a secret source of BNC 50 Ohm pass-through (or in-line) terminators, like:

https://www.digikey.com/product-detail/en/cal-test-electronics/CT2944C-50/CT2944C-50-ND/9826334

for less than $40? 75 Ohm passthroughs are cheap -- I guess it\'s a common problem in the video world -- but not 50 Ohm. We go through them by the dozens, and it adds up. We\'ve even made our own, but by the time you factor in labor, it\'s $40, like some sort of universal constant.
Thx,
Jim MacA

What is the highest operating frequency? How much power is it
expected to dissipate? If it\'s low frequency and low power, a BNC
T-connector and a common 50 ohm terminator should suffice. However,
if you want flat response into the GHz range, and/or high power
dissipation, it will be expensive. Or, you could take your chances
with a used termination from eBay.

50 ohm BNC feedthrough terminator:
https://www.google.com/search?q=50+ohm+bnc+feed+through+terminator&tbm=isch

BNC T-connector:
https://www.google.com/search?q=bnc+t-connector&tbm=isch

50 ohm BNC Terminator:
https://www.google.com/search?q=50+ohm+bnc+terminator&tbm=isch

I recently bought a bunch of 10-watt attenuators from Amazon.

https://www.dropbox.com/s/399bd9n1g5btt4t/Azat_1.jpg?raw=1

TDR/TDT:

https://www.dropbox.com/s/gpvt8uwl7qplv0w/Azat_2.jpg?raw=1

They ring a little at around 10 GHz.





--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[Jim MacArthur]

Thx all. The classic application is the client moving digital triggers around a lab through 30 feet of coax. So they\'ve already lost the game, not unlike the Lakers, but sometimes a terminator will help clean things up. And the BNC Tee + terminator is our stock solution, but clunky when you\'ve got a rack panel full of them. In the DIY department, I\'ve used this:

https://www.digikey.com/products/en?keywords=BNC-KIT-2.6MF

for custom filters and such, but too much effort to make terminators. I grabbed a bunch of Amazon terminators. I\'m sure they\'ll be good enough for what they\'ll be used for.
-Jim

 

[John Larkin]

On Wed, 23 Sep 2020 01:34:47 -0000 (UTC), John Doe
<always.look@message.header> wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

John Larkin <jlarkin@highland_atwork_technology.com> wrote:

I\'ve been real happy with super-cheap SMA and SMB thru-hole and
edge-launch connectors from Amazon.

And chocolate.

Dipped in caviar.

That sounds gross.

Turns out that we don\'t buy much chocolate from Amazon any more. We
have business accounts with Lundt and Ghirardelli now, about half the
price.

https://www.dropbox.com/s/y4gbytrfv7b3jlj/Eng_Choc.jpg?raw=1

I think we have a similar arrangement for coffee. Gotta keep those
engineers stimulated.