You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

the amp is not displaying the same impedance as the antenna or dummy load you tested the radios into. in other words, the connex is most likely delivering less power to the amp than the 148 because of the impedances that the amp is 'showing' to the radios. and of course if the connex is actually delivering less power to the amp, the amp will put out less power as well.

to see what power the radios are actually delivering to the amps you would need two 1/2w sections of coax with the watt meter in the middle and the other ends going to the radio and amp. this lets the radio and wattmeter see a mirror image of the amps input (but they will be 180* out of phase with each other).

on a side note, you most likely can play with jumper lengths until you find a 'sweet' length that displays an impedance to the connex that it likes better and allows it to deliver its full power to the amplifier.

<blockquote data-quote="ss8541" data-source="post: 81872" data-attributes="member: 1432">the amp is not displaying the same impedance as the antenna or dummy load you tested the radios into.&nbsp; in other words, the connex is most likely delivering less power to the amp than the 148 because of the impedances that the amp is &#039;showing&#039; to the radios. and of course if the connex is actually delivering less power to the amp, the amp will put out less power as well.&nbsp;&nbsp; to see what power the radios are actually delivering to the amps you would need two 1/2w sections of coax with the watt meter in the middle and the other ends going to the radio and amp. this lets the radio and wattmeter see a mirror image of the amps input (but they will be 180* out of phase with each other).&nbsp; on a side note, you most likely can play with jumper lengths until you find a &#039;sweet&#039; length that displays an impedance to the connex that it likes better and allows it to deliver its full power to the amplifier.</blockquote>

[QUOTE="ss8541, post: 81872, member: 1432"] the amp is not displaying the same impedance as the antenna or dummy load you tested the radios into. in other words, the connex is most likely delivering less power to the amp than the 148 because of the impedances that the amp is 'showing' to the radios. and of course if the connex is actually delivering less power to the amp, the amp will put out less power as well. to see what power the radios are actually delivering to the amps you would need two 1/2w sections of coax with the watt meter in the middle and the other ends going to the radio and amp. this lets the radio and wattmeter see a mirror image of the amps input (but they will be 180* out of phase with each other). on a side note, you most likely can play with jumper lengths until you find a 'sweet' length that displays an impedance to the connex that it likes better and allows it to deliver its full power to the amplifier. [/QUOTE]

Top Bottom