Need help to repair two phase 400 amps

1 526 2 517 3 527 4 522 5 528 6 530 7 524 8 540 9 530 10 517 11 535 12 521 13 532 14 522 15 538 16 531

yes still on diode
 
1 062 2 090 3 058 4 open 5 060 6 063 7 060 8 open 9 059 10 069 11 063 12 open 13 054 14 060 15 053 16 open
 
OK, , black on base, red on collector....1 thru 16....
 
Wow these guy's are not easy to check! I wonder if it is worth getting all new because of their age?
 
They are a 40 year old output, with a much less robust "safe-operating-area" than more modern devices...
 
1 564 2 559 3 562 4 open 5 569 6 565 7 565 8 open 9 564 10 561 11 565 12 open 13 563 14 557 15 565 16 open
 
Does anyone make a higher end replacement? and will 909's be ok to change out? And are the seal pats ok to reuse? I also read that the grease was a better option?
 
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The 66456's are good. The outputs are not shorted. We don't know if they are all good though. You were blowing fuses correct?
 
LarryD said:
1 thru 16 open I would like to purchase better outputs.
Click to expand...

We're a loooooooooong way from doing that. The old outputs will be sacrificial lambs till we get the board straightened out...
 
Were the fuse burns a simple break in the element, or was the inside of the glass blackened?
 
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