Ceriatone Forum

I hope someone can please help me.   On the yeti 50 bill of materials, what is a CT red and black special?  Where does it go?  Does it relate to B And C?
On the layout, what are those things at B and C?  Finally, can someone clear up V1 wiring?   I mean what is going on at the terminals strips?   Like the black blob on the left strip, something there is grounded but what is it?  It looks jumbled to me.  Please someone help
Jon b

Also I recommend  the 56K resistors the feed the bias pots need to be 33k 47k to get the bias up to where it needs to be. and use a heat sink on everything on board that you solder

The  red and black special are the famous Jose Arredond  that he was used on hot rod Marshalls and yes they go to B and C Black goes to B and Red goes to C

 AN1 and AN2 are backwards on this layout from output transformer to V4 V5 power tubes. 

50 watt Yeti layout the blob is a .001uF cap is ground and pussy trim is ground

V1 photo

The  red and black special photos

Thanks guys....i appreciate the help.   I am sure i will have more questions later as i get further in this build.

Mr ferguson...do you have any more pics.....like the pcb for the dc heaters

yes

Sweeeet!   Thanks, i was wondering how to do it.....
I am sure i'll have more questions coming up.....thanks again

anytime dude, let me know what you need!  I also have the voltage specs somewhere you will need them to make sure your AC and DC voltage is correct with a multimeter.

Turd

 I should add that these are with Ceriatone's PT at Maylasian voltage. If your PT has a different HT voltage or spec'ed to a different load then you might see some proportional variances. If the HT is higher then expect all the plate voltages to be higher

if you have not got them yet
I would recomend classic tone tranformers you cant beat them for the money if you got the cash get the Marstran transfomers
 
the voltage specs is for120v lead on power Tranformer

here is the site to go to

http://ceriatone.com/voltage/VoltageChart.xls

Use voltage chart for Cupa 50 voltage 120v it is same voltage as Yeti 50 go to bottom of page and choose the amp voltage you want to view

Rock on dude!!

Turd
                              

Thanks again....i did get the ceriatone/promithius trannys.  I am a ways from testing though.   Did i read right that someone said the bias resistors at 56 k won't get you the bias i need?  I anticipate having it assembled by october......not much free time right now with my job kicking my butt.   Did you do your initial power up with a variac?

Oh by the way...as I live in the US and will use 120 volts, what do i do with the extra wires for the other voltages...cut and cap em'?

yes I would put 33K to 47K where the two 56k bias resistors are don't understand why they would use 56k there most marshall amps use 33k to 47k here. the wires on the power trans just tidy them up and zip tie them out of the way. keep all wires as shot as possible high gain amps have a lot of noise and it helps. I did use my variac for first power on slowly increase voltage 10v every hour till you reach 120v it is a good idea to do, it lets you see something arcs if somethings wrong so you don't fry your amp, turn the lights out when you do it so you can see sparks. Oh and I must stress!! drain filter cap and check that no voltage it present when working on amp after it has had power to it. It WILL KILL YOU!!  here are more photos you may need so you can see the tidy wires!!

pics

Thank you so much...pictures really do help!   All right...off to building

Mr furgeson....can you help me understand the pcb connections as the diagram and the received board are nothing alike?

Can you send me a close up photo of your board front and back?

Oh thank you...my noggin is working on this, but my neurons just aren't firing right!

Turd....help....i am dying on this pcb?  I just can't get stuff to line up!   Anyone...please help!