Couple of Green Pre parts questions

[asm]

the 10K Log pot, i cant find it on mouser, also, whats this for?

the 1K and 20K multiturn, is this a trimpot or something?
the 100K one is labled "flat", but what are the others?

the ferrite's, are they the winded kind, doesnt matter, ect? theres no specs for them


thanks for any help.
t

 

[OddHarmonic]

Mouser Part #313-1220-10K

This works as a 6dB trim pot on the output.

The 1K multiturn is for setting CMRR

The 20K multiturn is for setting the peak detector DC offset

The 100K multiturn is for setting the LED meter levels

andrew

 

[asm]

thanks man, the multiturns are just standard trimpots or what?

 

[OddHarmonic]

no problem! They are just standard trimpots

andrew

 

[asm]

the mouser part number you gave shows a Audio taper, thats not the same as a LOG taper is it?

 

[OddHarmonic]

same thing

 

[peterc]

The PCB will also allow a multiturn 100k, the flat one is cheaper & not critical in that position.

Peter

 

[asm]

now i cant find a 22pF or 150pF cap in a polycarb or polyester. i can find something that small in ceramic, but the BOM is calling for a good quality, and they are all in large value radials

also, i cant seem to locate C21,C25,C26,C27, C20 on the schematic which these are for?

:?

 

[peterc]

A 22pF ceramic will be fine here.

Try a 150pF in polystyrene.

The part numbers do not correspond between the schematic, BOM & PCB. They were done at different times in different circumstances & so have changed.

Peter