Hello i have a cobra 148gtl my upper side band and lower sideband are way off frequencey also has some type of knob inside with black tape looks like a mod if you need pictures i can send for better viewing.
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Yes i has an echo board installed they replaced the rf gain with a on and off switch guess to turn echo on or off and the swr cal is used now for echo as well.pics would help,,,, being off freq,,,,has the clarifier been opened,,,, put on freq counter and while keyed up move clarifier and see if freq changes,,,, has echo been installed? sometimes echo adjustment is put on front and what ever was there taped up and stuck inside,,, may be dial a watt,, too seen that done,,,,,
clarifier must not be open because i have tried turning the clarifier and my frequency dosent move at all thanksthat on the inside is the knobs they replaced with the echo controls,,,,,, done that alot just put inside radio taped up and put echo contorls in hole,,,,did you check the freq on counter? if the clarifier has been opened it is sometimes really wierd to line up the sideband,,,, my 148 is opened and the center slot for am is 1 oclock,,,, if i turn it fully anticlock wise it 1 channel down,,, on side band i have to tune in someone very careful it is real sensitive but it works,,,,
Yeah my other radios when you key up on side band would show you frequency, but strange reason this 148 would not
Yes i has an echo board installed they replaced the rf gain with a on and off switch guess to turn echo on or off and the swr cal is used now for echo as well.