FINAL SWAP

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KEVIN622004
Newbie
Newbie
Posts: 1
Joined: Sunday 5th Apr 2009, 2:57
First Name: KEVIN

FINAL SWAP

Post by KEVIN622004 »

Radio Make and Model:
PCB Number:
PLL Number:
Test gear available:
Symptoms:
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?:
smokinjoe
Light User
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Posts: 114
Joined: Thursday 12th Apr 2007, 7:55
Location: Virginia

Re: FINAL SWAP

Post by smokinjoe »

I have used the mrf497 hope this helps.
damo666
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Joined: Wednesday 16th Jan 2008, 12:19
Location: england

Re: FINAL SWAP

Post by damo666 »

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.
violator
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Posts: 9
Joined: Tuesday 19th May 2009, 3:46
First Name: Lee
Location: WI

Re: FINAL SWAP

Post by violator »

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.
146 GTL
D104 M6B
2/2290's in a box
Wilson 1000
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