Ceriatone Forum

heyho, i am currently putting all the bits in place and i was wondering if the voltage regulator needs to be bolted down to the chassis via the metal square bit the sticks out of it.

Also, is the bus bar soldered to the chassis directly or should i use a wire and send it to a seperate lug?

thanks in advance!

Yes the voltage regulator is bolted through that hole.

The brass busbar is only connected to the pot terminals as shown, with one wire coming down to an earth lug by the volume pot. The soldered wire hold it in place in mid air. I guess this is to ensure that all circuit grounding goes in the correct place to reduce the possibility of noise.

ah ok, cheers!

ok, a few more questions here...

1) what is the difference between the several bits of bare wire and the one long thicker bit of bare wire that came with kit as far as uses go?

2) I have used the long screws to screw in the power socket, foot pedal socket and the board stands. is this correct? because i don't have any to screw the smaller boards in place now.

I'm guessing that the thinner wire is for early in the signal chain and the fatter is for the likes of the shorts across the output jack sockets. The long brass wire is for the busbar above the pots.

You will need the longer screws for the 5 small boards since they, with their insulating backing board are too fat for a short screw to fit. I used the short screws everywhere they would fit!

ah that does make a lot of sence. Thanks once again!

I used that long straight piece for the buss bar.
I used the next thinner piece for the links from the pots to the buss bar.
I used the skinny ones that look like resistor leads for the shorts on the switches.

Here is a picture of my buss-bar, I used the lugs on the potmeters to hold it in place.
I assembled it on the outside for easy access, then just mounted it inside.

(http://www.bluegate.nl/Images/CT/CT8.jpg)

that is genious!

ok next question:
I am wiring the front panel at the moment and i am alittle confused. For connections T,V,X,C,Y,B,A, the thick black wire is used and the green wire connects to it on the diagram. Why can you not just solder the ground lugs of the pots with the other lugs that go to the board and valves?
thanks.

Those connections are Shielded Cables.
They are connected to ground on one side as close as possible to the inner core.
On the other side leave the shield in tack as far as possible and seal with shrinktube
so just a little core sticks out to solder in place.

what do you mean, "as close as possible to the inner core"?  in the example of the volume pot with lug 2 going to pin 7 of V1, with the ground bus attached to the shielded wire. Should i solder the core of the shielded wire to lug 2 AND to the wire coming from the ground bus which in affect, is the same as soldering lug 2 direct to the ground bus, then heat shrink this end. At the other end at V1, i then solder the core to the lug and also heat shrink this?
Or do i do something else?

On the pot side, keep everything as short as possible and wire them as shown.
On the otherside, use shrincktube and keep everything as short as possible.

You don't want to connect both sides of the shield to ground (groundloop hum)
If you don't use shielded cable or leave the leads to long, then you'll pickup noise & hum.

ah, ok, just to clear things up,  i do not solder anything to the shield of the wire, only the core, right?

thanks for all your help so far and sorry about the bnoobins questions.

Fred, you need to ground the shielding at the pot end, but not the other. Here's what I did.

Trim about 20mm of the outer sheath away. Un-weave(?) the shielding, move it all round to one side and twist it tight. Tin it and trim it back to about 10mm long.

Prepare a piece of black wire with 10mm of exposed wire, tinned.

Lay both wires on a piece of wood with the exposed wires next to one another and solder them together. Slip a piece of heat shrink tube over the thin wire and push it over the solder joint. Shrink it.

Fold the wire back, slip a larger piece of heat shrink over the lot leaving about 10mm of the inner wire exposed, shrink it. You can see this in the photos. Now you can strip the inner core and solder it to the pot tag and then do the same with the earth wire.

At the other end, trim about 20mm of outer sheath and the shielding leaving only the inner core. Cover the end of the outer sheath with some more heat shrink so the shielding is well covered.

Cheers

Hywel Harris

AH I SEE! thanks guys, i better go and re some of my handy work. Thanks!

Here is a picture showing the ends of the shielded wire and the bus

(http://img.photobucket.com/albums/v670/ic-racer/relays.jpg)