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Radio Make and Model:
PCB Number:
PLL Number:
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WHAT OTHER FINALS CAN I USE IN PLACE OF THE MRF 477.
What is working:

What has been tried:

Did it suddenly happen ?:
Anything else that may be of help?:

I have used the mrf497 hope this helps.

The sd1446/mrf455 has very similar specs and Hfe. In my estimation, i think it'd drop in. If it didn't it certainly would with a bit of component alteration. Just my $2. Hope this helps.

I replaced sd1446 finals w/ 2sc2290's in an old Galaxy linear. I found the upgrade/ replacement info in a pamphlet from RF parts and it worked very well. They stressed the importance of using 2 beta-matched finals together rather than randomly picking a couple of the same make/model.