scientific explanation???

[rabbiporkchop]

 

[Road Squawker]

of course it matters,............ coax thats too short to reach the antenna, just WON'T work

 

[rabbiporkchop]

of course it matters,............ coax thats too short to reach the antenna, just WON'T work

All 3 reach.
Only one works properly.
Care to explain?

 

[Road Squawker]

...Only one works properly...
Care to explain?

that must be the one that was measured using the "special "formula, that isn't available on line"


oh and "SWRS"............................ REALLY????

 

[Captain Kilowatt]

If manufacturers would provide a 50 ohm input impedance for their amps then coax length between the radio and the amp would not matter. Because they do not provide a 50 ohm input impedance the operator is left to use a certain length of coax between the radio and amp in order to transform the impedance to something that is mutually beneficial for the radio's output and the amp's input impedance. When the match is off the radio drops it's drive level to the amp. You don't have that problem with ham amplifiers because the inputs of those amps are tuned for 50 ohms.

This has been beat to death many times on this forum and many others.

 

[vkrules]

he wants to sell you his patch cable

 

[rabbiporkchop]

that must be the one that was measured using the "special "formula, that isn't available on line"


oh and "SWRS"............................ REALLY????

In all your infinite wisdom you still haven't explained the reason for the waveform on the scope changing with each jumper. In all seriousness,
I'd like a rational explanation.

 

[Road Squawker]

[QUOTE="Captain Kilowatt, post: 523242, member: 39"...transform the impedance to something that is mutually beneficial for the radio's output and the amp's input impedance...

This has been beat to death many times on this forum and many others.[/QUOTE]

yeah, he blows this off and uses the term "phase angle",.............. sounds IMPRESSIVE.

heck, a FS meter moved along the coax will tell you the truth .

 

[Captain Kilowatt]

Stick an antenna tuner between the radio and amp and watch what happens as you adjust the match.

 

[rabbiporkchop]

If manufacturers would provide a 50 ohm input impedance for their amps then coax length between the radio and the amp would not matter. Because they do not provide a 50 ohm input impedance the operator is left to use a certain length of coax between the radio and amp in order to transform the impedance to something that is mutually beneficial for the radio's output and the amp's input impedance. When the match is off the radio drops it's drive level to the amp. You don't have that problem with ham amplifiers because the inputs of those amps are tuned for 50 ohms.

This has been beat to death many times on this forum and many others.

Does Texas Star qualify as a "ham amplifier"?
The waveform changes with those as well depending on jumper length.

 

[Captain Kilowatt]

Does Texas Star qualify as a "ham amplifier"?
The waveform changes with those as well depending on jumper length.

LOL. Texas Star most definitely does NOT qualify as a ham amplifier. It is just another piece of CB/11m stuff. Try your experiment on an amp that has Yaesu, Kenwood, Alpha, Ameritron, Emtron, Henry, or Tokyo High Power etc. on the front panel.

 

[Road Squawker]

... In all seriousness,
I'd like a rational explanation.

ok,..... if he used the coax that showed lower output power, and just changed frequency,

what do you think would have happened?

 

[rabbiporkchop]

ok,..... if he used the coax that showed lower output power, and just changed frequency,

what do you think would have happened?

The rf generator wasn't touched.
The only thing that changed was the jumper.

 

[vkrules]

The waveform on the scope looks like plain old overdrive to me. Dont think its self oscillating.We might be overthinking it The good cable might be the one with the most attenuation, or the worse load.

 

[vkrules]

anyway I have never seen any amp I use do that just by changing the jumper cable.