[Shike]

Hey everyone,
 
I'm looking to build a pro bias board for my Stax SRD-7.  I found a guide at Headphonia, but want to make sure my selection is correct before finalizing the order.  They don't list the type of caps used, only the specs needed but there's a picture.
 
Guide:
 
http://www.headfonia.com/stax-srm-1mk2-bias-modification/
 
Pic of their board:
 

 
Parts:
 
VR1: 500k Ohm, Single Turn
R1: 470k Ohm, 1/2 Watt
R2: 33k Ohm, 1/2 Watt
R3: 2.7M Ohm, 1/2 Wtt
R4: 2M Ohm, 1/2 Watt
D1, D2: 1N4007 (or other diodes with ratings above 800V)
C1: 0.1uF 630V, AC Rating
C2: 0.1uF 1000V, DC Rating
 
The parts I'm questioning:
 
R3 and R4, am I right assuming these are carbons (the white ones)?
 
C1 and C2: are pulse film capacitors acceptable for the usage? (schematic at the above link, but they're the only two caps shown)

 

[jdkJake]

The resistors are carbon, but, you could use metal film as well. The power rating is most important.

In the picture, C1 is a mylar capacitor. C2 looks to be a film cap. I would mimic that selection.

Some serious voltage with that circuit. Be very, very careful!

 

[jdkJake]

BTW, for the mylar cap, you probably want to use one that is flameproof and rated for use across an AC line. The circuit would be much safer that way.