How to use a dummy load

Buzzard78945 · Feb 21, 2020

Please forgive me for asking this question I’m 99.9% sure I know the answer I just like to verify. I do feel embarrassed to ask such a stupid question please don’t slaughter me on here...

I recently bought a MFJ 300watt dummy load and I was thinking since it’s 50ohm perfect already I don’t need an extended length coax correct?? I could use just a small jumper (18in) from radio to watt meter; another (18in) jumper to dummy load... correct????

Im sorry for the stupid question I guess it’s such a dumb one it’s not easily answered by a quick google search

IM NEW! I DONT KNOW WHAT TO DO
Joe Dirt

Dmans · Feb 21, 2020

Buzzard78945,
No slaughtering here. Just as long as you hit yourself in the forehead with a ball peen hammer!

You are absolutely correct. At 50 ohms, any length of coax will do. If someone tells you differently, they have hit themselves 1 too many times!!

Welcome to the forum!

73
David

Tweetybird · Feb 21, 2020

Buzzard78945 said:
Please forgive me for asking this question I’m 99.9% sure I know the answer I just like to verify. I do feel embarrassed to ask such a stupid question please don’t slaughter me on here...

I recently bought a MFJ 300watt dummy load and I was thinking since it’s 50ohm perfect already I don’t need an extended length coax correct?? I could use just a small jumper (18in) from radio to watt meter; another (18in) jumper to dummy load... correct????

Im sorry for the stupid question I guess it’s such a dumb one it’s not easily answered by a quick google search

IM NEW! I DONT KNOW WHAT TO DO
Joe Dirt

I need the answer myself thanks for asking.

RT431 · Feb 21, 2020

Dmans said:
Buzzard78945,
No slaughtering here. Just as long as you hit yourself in the forehead with a ball peen hammer!
You are absolutely correct. At 50 ohms, any length of coax will do. If someone tells you differently, they have hit themselves 1 too many times!!
Welcome to the forum!

73
David

Agreed.

And welcome!

Buzzard78945 · Feb 21, 2020

Thanks for the verification! in my line of work I’d rather ask a stupid question than make a stupid costly decision without making sure first .

Road Squawker · Feb 21, 2020

Buzzard78945 said:
Thanks for the verification! in my line of work I’d rather ask a stupid question than make a stupid costly decision without making sure first .

Just what length of coax were you thinking about using,.... and why?

Tallman · Feb 21, 2020

Your coax must be able to reach from the radio to the Dummy load! More if you want it.
Less if you don't need it.

Buzzard78945 · Feb 22, 2020

Road Squawker said:
Just what length of coax were you thinking about using,.... and why?

I was just making sure I didn’t need a long length of coax (18ft) to be able to put a load to the dummy load but since it’s 50ohm’s I figured I didn’t need that length

Buzzard78945 · Feb 22, 2020

Tallman said:
Your coax must be able to reach from the radio to the Dummy load! More if you want it.
Less if you don't need it.

Yes sir I got that verified now thanks!

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How to use a dummy load

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