This Radio Shack SWR Field Strength Meter PN 21-533 is a classic, tried and true design and has been around for decades. It is designed to handle up to 1000 watts, although I have never passed more than 100 watts through mine. This meter will allow you to measure forward and reflected transmitted RF power. Install the sense antenna and you can also use it to measure field strength. Nice feature. I've used various versions of this Radio Shack SWR F/S meter for decades. Basic, simple, functional. It is well constructed and will take moderate abuse. Every amateur radio operator, and CB'er for that matter should own one.
Verified purchase: Yes | Condition: Pre-owned
This works for cb freq only. It is listed for ham but does not work outside 10 -11 meters bands. The field strength is really not that important. Noone really need it. The swr does work, but has cheap internal components with a cap, three diodes and a meter and a few resistors. This thing is not much. Buy a better meter and better brand with power readings and a good swr trap. This is not good on ham equipment, only for cb band.
Verified purchase: No
used.but in brand new condition. easy to use! excellent purchase
Verified purchase: Yes | Condition: Pre-owned
Perfect meter for testing power output of small portable radios. Especially effective at verifying radio power out and antenna health.
Verified purchase: Yes | Condition: Pre-owned
Seems to work fine long-term reliability TBD
Verified purchase: Yes | Condition: Pre-owned
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