Bob, I just received an mtr, looks similar to what your talking about here. Rx module indicates trd 6411 which is no internal. It did at some time have an external that was removed when run as a base station. So to run this in a repeater config without either the internal or external.....impossible ...

Another senario....I am looking at one to purchase, have no access to read the rss. It had,(but was removed) an external. The cable is coming from the usuall place, but is not attached to the chassis in the usuall place when no external mounted. Is it safe to assume that there is an internal? or ...

Thanks

Thanks to both who replied. I do have a RFS/Celwave duplexer that will be tuned and put in so isolation is not a problem here, also a single radio at the site so no qrm....didn't think of looking for the greyed out, that will tell me for sure, as well as the fru's.
I don't need the filtering ...

It came with the external, however I do not need it. Am I safe to assume it has a varactor internally and can I just bypass the external coming from the receiver?
Thanks, appreciate your help
Gordon

Have a vhf 100 watt mtr with an external preselector. I heard that a jumper is removed from the internal when useing the optional
external. Does any one know if this is true? and where do you find tuning info on the external? best route to go? I believe the receivers are wide band as no tuning to ...