Converting an H2O into an MXR PHASE 45 and SWAMP THANG.

randomhandclaps

MattFGBI said:

randomhandclaps said:

MattFGBI said:

Got all the bits on..... signal is going through but no effect. Going over the joints in a min. 

Have you started to bias the JFets yet?  If they are way off you will get signal but no effect.

What does this mean? 

OK, first off did you buy a matched set of 5952s or have you just picked two randomly?

The trim pot is for biasing the 5952 JFets (or ensuring they are running at the 'correct' voltage so to speak).  It's usually a 250K but looks like you've used a 200K which should work.  Phaser 45/90s are fairly straight forward to bias as there's not ideal voltage so no measuring needed.  Bias varies dependent on each transistor set.  As you if you turn the trim pot it will range from no noticeable effect through to self oscillation.  Between the two you will hit a smallish window where the phaser works as you would expect.  Within that small range you have to use your ears and try various speed setting to strike the best balance.

MattFGBI

Ok, I'll have a go at that. 

Here's a quick shot of where I'm up to: