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I saw this 50 ohm "terminator" BNC connector at Radio Shack today and
was wondering if it could be used as an antenna dummy load? It is
designed as a computer network terminator - just a female jack without
any output connector. I believe the only question would be "Could it
stand the power output?" What if the output was just 5W? Anybody know
about this product or have used it as a dummy load?

It'd sure save the price of a "real" dummy antenna (it was priced about
$4.00 USD).

Thanks
--
MGFoster:::mgf00 at earthlink decimal-point net
Oakland, CA (USA)
** Respond only to this newsgroup. I DO NOT respond to emails **

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In article , MGFoster
wrote:

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I saw this 50 ohm "terminator" BNC connector at Radio Shack today and
was wondering if it could be used as an antenna dummy load? It is
designed as a computer network terminator - just a female jack without
any output connector. I believe the only question would be "Could it
stand the power output?" What if the output was just 5W? Anybody know
about this product or have used it as a dummy load?

It'd sure save the price of a "real" dummy antenna (it was priced about
$4.00 USD).

Thanks

Hello, and I've got a whole box of these in my networking lab (from the
old 10Base2 days). A terminator certainly could be used as a dummy load
but I would probably keep the average RF power delivered it under 1 W.
Not sure how useful that would be even for a QRP setup. Sincerely, and
73s from N4GGO,

John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337

"MGFoster" wrote in message
...
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I saw this 50 ohm "terminator" BNC connector at Radio Shack today and
was wondering if it could be used as an antenna dummy load? It is
designed as a computer network terminator - just a female jack without
any output connector. I believe the only question would be "Could it
stand the power output?" What if the output was just 5W? Anybody know
about this product or have used it as a dummy load?

It'd sure save the price of a "real" dummy antenna (it was priced about
$4.00 USD).

Thanks
--
MGFoster:::mgf00 at earthlink decimal-point net
Oakland, CA (USA)
** Respond only to this newsgroup. I DO NOT respond to emails **

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Almost certainly, the power rating of the terminator is either 1/8, 1/4, or
1/2 W.

Tam/WB2TT

Tam wrote:
Almost certainly, the power rating of the terminator is either 1/8, 1/4,
or 1/2 W.

Does Radio Shack not specify the power rating?
--
73, Cecil http://www.w5dxp.com

"Cecil Moore" wrote in message
...
Tam wrote:
Almost certainly, the power rating of the terminator is either 1/8, 1/4,
or 1/2 W.

Does Radio Shack not specify the power rating?
--
73, Cecil http://www.w5dxp.com

Not in the catalog. Maybe on the bubble pack.

Tam/WB2TT

On Jan 17, 2:54 am, MGFoster wrote:
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I saw this 50 ohm "terminator" BNC connector at Radio Shack today and
was wondering if it could be used as an antenna dummy load? It is
designed as a computer network terminator - just a female jack without
any output connector. I believe the only question would be "Could it
stand the power output?" What if the output was just 5W? Anybody know
about this product or have used it as a dummy load?

It'd sure save the price of a "real" dummy antenna (it was priced about
$4.00 USD).

Thanks
--
MGFoster:::mgf00 at earthlink decimal-point net
Oakland, CA (USA)
** Respond only to this newsgroup. I DO NOT respond to emails **

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As others have noted, beware of the power rating. On the other hand,
I have a dummy-load-on-BNC-jack that I made with four 200 ohm 2 watt
metal-oxide resistors (and the connector, of course). The connector
is one with a square base, four ground pins and a pin in the center,
for mounting on a PC board, like DigiKey A24512-ND. I cut the lead
completely off one end of each resistor, and trimmed the lead at the
other end of each so when folded over back against the body it reached
not quite all the way to the end with the lead cut off. The four
leads are soldered around the center pin of the connector. The
insulating covering is scraped off the resistor ends with no lead,
exposing the metal cup that contacts the resistive element. The four
ground pins are clipped off the connector, and the cups are soldered
directly to the connector ground, one in each corner. The result on
my HP8753E network analyzer (freshly calibrated and all that) shows
return loss greater than 40dB (S11 below -40dB) out to beyond 300MHz,
and greater than 20dB to about 850MHz. In other words, it is as good
as my semi-precision loads out to 300MHz, and quite a bit better than
a whole bunch of other 50 ohm BNC loads I have -- quite adequate for
any ham work I would do out to 500MHz at least, and able to dissipate
a moderate amount of power. YMMV, of course, depending on the
particular metal-oxide resistors you use, and admittedly it is really
helpful to have a good network analyzer around to test it on. But it
should be no problem making a load that way, usable through at least
VHF.

Cheers,
Tom

"Tam" wrote in
:


"Cecil Moore" wrote in message
...
Tam wrote:
Almost certainly, the power rating of the terminator is either 1/8,
1/4, or 1/2 W.

Does Radio Shack not specify the power rating?
--
73, Cecil http://www.w5dxp.com

Not in the catalog. Maybe on the bubble pack.

I dout they have a power rating on Digital line terminators! That isn't
one of the specs in common use in that field.

They aren't made for terminating much power at all.

As for the original question, they can be used as a terminator, but not
at the power levels we are likely to use, unless you are into QRPp.

- 73 de Mike N3LI -

"MGFoster" wrote in message
...
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I saw this 50 ohm "terminator" BNC connector at Radio Shack today and
was wondering if it could be used as an antenna dummy load? It is
designed as a computer network terminator - just a female jack without
any output connector. I believe the only question would be "Could it
stand the power output?" What if the output was just 5W? Anybody know
about this product or have used it as a dummy load?

It'd sure save the price of a "real" dummy antenna (it was priced about
$4.00 USD).

Thanks
--
MGFoster:::mgf00 at earthlink decimal-point net
Oakland, CA (USA)
** Respond only to this newsgroup. I DO NOT respond to emails **

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Hi, look he
http://www.bourns.com/components.aspx?cmsphid=7631383|7163299|3412571

DIY - you need piece of AL heatsink and connector. Enjoy own dummy load! 73

"MGFoster" wrote in message
...
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I saw this 50 ohm "terminator" BNC connector at Radio Shack today and
was wondering if it could be used as an antenna dummy load? It is
designed as a computer network terminator - just a female jack without
any output connector. I believe the only question would be "Could it
stand the power output?" What if the output was just 5W? Anybody know
about this product or have used it as a dummy load?

It'd sure save the price of a "real" dummy antenna (it was priced about
$4.00 USD).

Thanks
--
MGFoster:::mgf00 at earthlink decimal-point net
Oakland, CA (USA)
** Respond only to this newsgroup. I DO NOT respond to emails **

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Hi, The second link:
http://www.caddock.com/Online_catalo...e/Current.html

at the bottom of the page you can see resistor: MP9100, 100Watts! just
amazing! 73's

"Cecil Moore" wrote in message
...
Tam wrote:
Almost certainly, the power rating of the terminator is either 1/8, 1/4,
or 1/2 W.

Does Radio Shack not specify the power rating?
--
73, Cecil http://www.w5dxp.com

Hey engineer! here is link:
http://www.caddock.com/Online_catalo...e/Current.html
MP9100
Dont lure good people to smacks shops! Just DIY!