I've got a pair of PCBs in front of me with the schematics. The listing for the 100K 1w is incorrect,
on the schematic of the PC-6 phono board the 150K is marked as 1w. The actual boards I have in front of me
has a 1/2 watt resistor on it, it's 40 years old, doesn't even look like it ever got warm.
Using the voltage chart from the PAS3 manual, that resistor has 95v across 150K equals .63ma and
that is .06 watts. The one resistor with the most power across it is the 100K plate resistor on PC-5 line amp.
It has 130v across 100K for 1.3ma and that is .169 watts, about 1/3 of 1/2 watt rating.
On the actual boards I have in front of me that 100K is a 1w resistor even though the schematic doesn't
spec that. It is an original part. None of the cathode resistors use more than .06w - See updated board layouts below ...

Roy @ www.tubes4hifi.com

The caps 1500 pf and .004 uF... what were they for anyway? The circuit can do without them? Thanks.

Can anyone provide some insight as to why in the PC5 diagram provided by tubes4hifi the 7500pF caps are substituted with 6800pF replacements? It seems like this would have a negative effect on treble response....

in reply to the last two posts, the .002 cap connected to eyelet 4 is part of the treble tone circuit.
as for replacing the 7500pf with 6800pf in the bass section, two reasons I do this, one, try finding a 7500pf cap . . .
2nd, both the treble controls and the bass controls have WAY too much gain in a stock PAS, so subbing a 6800pf for a 7500pf
is a fairly minor change and might only give you 12db (that's 4X !!) of boost/cut instead of 15db.

Just wondering what wattage the resistors are suppose to be and what voltage the caps are suppose to be? thanks

look at the info at the top of this page - all resistors are half watt except one is marked one watt.
Most capacitors should be rated at 400vdc (you can always check the schematics to be sure of anything).
Here is a copy of the original PAS schematic that I've labeled so you can tell what is what,
then two much better re-drawings of the two PCB schematics.
In an original PAS preamp, PC6 eyelet 4 and eyelet 11 have two separate connections to chassis ground,
when I service these preamps I cut both ground wires out and run a single ground connection to eyelet 10,
and then connect eyelet 4 and eyelt 11 together with a wire, as shown on the bottom schematic.

Thanks, I find the original diagrams confusing, I didn't see where they labeled the voltage rating of the board capacitors, I've been trying to figure out what the voltage should be at the last stage of the filter to the boards.