I googled "Mirage B-215-G VHF 2 meter amplifier schematics" and didn't really see much, but I found a post on another forum and a gentleman said he has a schematic for your amp.
His call is "WB5DEQ", do a callsign search at the top left of this screen and it will give you his info. Hope this helps.....
73 DE Jim
"YOU DON'T KNOW, WHAT YOU DON'T KNOW".
"Anyone fool can Criticize, Condemn, and Complain, and most do". - Dale Carnegie
South Bend, Indiana : Home of the UNIVERSITY of NOTRE DAME - "GO FIGHTING IRISH"
In Great Memory of N9MQJ "Bill" (SK)
November 13, 1940 - January 25, 2006
A GREAT AMATEUR RADIO OPERATOR
AND A VERY VERY GOOD FRIEND..........