Pearl Two

[6L6]

Oh - Peter's universal board. Yep, wonderful, totally appropriate (and somewhat overkill...perfect!) for the pearl. Get (8) MUR860 diodes for this. Actually, (12) because you need 4 for the B1.

Only 1/2 watt resistors available instead of 1/4? Get them from Percy and use them. Dissipation only matters when it is to small.

[Woody1911a1]

6L6 , when someone refers to "Brians" boards , i believe they are referring to this brian Chipamp.com

he also sells aleph pcbs and aleph ps pcb's

cheers Woody

[6L6]

Originally Posted by Woody1911a1

6L6 , when someone refers to "Brians" boards , i believe they are referring to this brian Chipamp.com

Yes, that's what I thought as well, but he really doesn't have a 'universal' PSU board.

[richluvsound]

Thanks 6 ,

the Brian boards LOL I went through about 10 building my first amp

I'll order 2 boards and the 12 thingys - Digikey ?

Do you have your boards yet or will make your own ?

I'll order the remaining resistors tomorrow .

Rich

[6L6]

These are the Diodes - Digi-Key - MUR860GOS-ND (Manufacturer - MUR860G)

That board was made with them in mind.

I have my Pearl boards and am going to use a (because I have it on-hand) Peter Daniel chipamp PSU board (which basically will only hold the diodes and one small snubber cap) and either use perfboard or just Point-to-Point the 'big' caps and the resistors.

[richluvsound]

6,

what size Caps..... Panasonics ? Actually , A BOM for this voltage would useful ?

Rich

[6L6]

Rich,
Remember that my PSU has the requirement of dropping a few volts, because the transformer I'm using is a higher voltage than specified.
Anyway, Wayne figured that most people would just buy another pair of the 10000uf 35v electrolytic caps -- the same that are on the PCB. However, if you are using the Peter Daniels universal board, (which has room for 4 caps) I would buy a quad of them, or something similar. It mainly depends on your box for the PSU.

[6L6]

Here is my plan. Hopefully it will work!


Please excuse my CAD program, it's rather low-tech.

[richluvsound]

Morning ,

I guess my values wont change . Boards shipped today from Peter ( nice guy for a Canuck )

Should I add these parts to my digikey order ?

BTW I'm using these Digi-Key - 1003-1192-ND (Manufacturer - 127010-0030)

The 35 amp 200v rectifier is confusing me ?

also ... R15 = RX please explain ?



Caps http://search.digikey.com/uk/en/prod...1119-ND/588860 OK ?

Have a great day all !

[6L6]

Rich -

The plugs you picked out will work, but 6 pin just makes it harder to solder and work with. You only need 3 pins.

The big bridge is a ground loop breaker. Signal ground connects to it, and then the chassis through the diodes, to keep the signal off the metal chassis. The diodes have to be really big in case there is an actual earthing problem, to pass the possible current.

R15 is normally a jumper. Here is Wayne from the manual;

"The overall gain of the circuit as shown is 55 dB @ 1K Hz. Decreasing R14 from 1K to 300 Ohms gives 10 dB more gain when desired for lower output cartridges. R15 which normally would be shorted to 0 ohms can be replaced by a resistor to provide more gain as an alternative to reducing the value of R14. C15 has been placed on the board to allow for additional adjustment of equalization. In both cases these values are up to you."