Dumb question for cb experts.

Jonathan_lemoine · Post by **Jonathan_lemoine** » Sunday 14th Dec 2008, 7:26

I was browsing through transistor specs and came across some cool looking transistors. I was woundering why someone couldn't put a MRF454 final in a radio such as the cobra 29, or is it posible? and would it require a lot of modifications. This thing puts out 80 watts. I have never taken an electronics course. I have been only playing around with some cobra 29s and turning them up a little. If finals like this could be used in a radio it would be a lot of fun.

http://www.youtube.com/user/TheDefpom · Post by **The Defpom** » Sunday 14th Dec 2008, 8:23

The MFR455 (or equivalents) has been used in the President Lincoln radio, to replace the obsolete MRF477.

Jonathan_lemoine · Post by **Jonathan_lemoine** » Sunday 14th Dec 2008, 9:19

Is it possible to to modify a cobra 29 to take a MRF454? Has anyone tried?

timrim · Post by **timrim** » Sunday 14th Dec 2008, 10:01

Yes, its possible. You will need to mount it on a heatsink capable of dissapating the heat. It is easier buying a stinger board, that has the heatsink and circuit board included, however, I find the heatsink supplied too thin, so I always add more aluminum.

Jonathan_lemoine · Post by **Jonathan_lemoine** » Sunday 14th Dec 2008, 11:06

Thanks for the input guys. I was just curious.