Yeasu ft 857 ext meter on CB?

[Copycat32]

Hi nis it posable to is tall the yeasu Ft857 external meter on a Cb Radio like a trc457 cobra 139xlr tram D300?
Just curious nif it would work or if uts possible if I add a jack to the rear of the radio and pick up power from the meters?

 

[nomadradio]

It's all about the specs. Not every meter uses the same combination of current and voltage. The meters in most CB/10-meter radios take a quarter or a fifth of a milliamp, 200 or 250 microamps to read full scale. The resistance matters too. Not sure what's typical for the factory meters. Hooking the external meter in series with the built-in may work better than connecting it in parallel. Without knowing the external meter's coil resistance and sensitivity, It's a crap shoot as to what it will do. Easiest series connection would be to unhook the negative wire from the meter. Connect the + side of the external to the loose end of the built-in meter, and connect the negative side of the external meter to the ground where the internal one was unhooked.

Haven't tried this, just educated guessing.

73

 

[W4KVW]

YEASU = YAESU & more than likely it will Not work. The LDG meter that was made for the ICOM 7700 works with the ICOM 7800 but it can't do both bands just one, but it does work. Basically, the same radio with two independent receivers.

 

[Copycat32]

OK I figured but was asking..

Thank You for the replies