Derek92994's 700 Ser II White Oak conversion

[laatsch55]

They are in parallel so if one is shorted they will all appear shorted...are they the 96's or 95's?

 

[laatsch55]

So the 95's.
Negative on base then..try em again..

 

[derek92994]

So the 95's.
Negative on base then..try em again..

All shorted except bottom output

 

[laatsch55]

So...you are now lookin for tenths of an ohm difference...

 

[derek92994]

So...you are now lookin for tenths of an ohm difference...

My meter isnt that good, all 10.7-10.8 B- to C+

 

[laatsch55]

The only way to isolate them is to resolve them or solder one end of the emitter resistor..

 

[derek92994]

Desolder 1 end of the 0.33j’s?

 

[laatsch55]

Desolder them or desolder one end of the emitter resistor.

 

[laatsch55]

Yes....the end closest to the output..

 

[derek92994]

Ok I shall get to work, need to do a quick house chore first. Once isolated, do I do the standard 6 way tests on outputs as if they were out of the backplane?

 

[laatsch55]

Yes...be careful and be quick on the solder suck. Most of the solder is on the backside..

 

[laatsch55]

Nope, check that Darc, they'll still be paralleled through the collectors and bases...gonna have to drop em..

 

[derek92994]

Maybe its safer to remove the outputs, I dont have any spare resistors if I fry one

 

[laatsch55]

Yep, good chance for a solder blob on the back..

 

[derek92994]

Ok I will remove the outputs, does the very bottom one have to be removed also?

 

[laatsch55]

Got new sil pads?

 

[derek92994]

Got new sil pads?

Yep

 

[laatsch55]

K...

 

[derek92994]

Battery powered solder station works a treat, up to 3 hours run time on a 18v 5amp battery. Heats up quick.

About to test these guys, need a cig.

 

[laatsch55]

Getting better at that..