need to get a bigger power transformer?

i think that one of the original TIPs was flipped over and screwed to the heat sink. (i had to unscrew it to read it) but im not sure. i didnt take pics before i tore it apart.

i think im gonna park this thing for a while, this whole project has ticked me off

so once i fix this thing, if i unplug one of the speakers it should work right? would having both speakers plugged in when i turn it on blow fuses?

hey i was looking at the layout (data sheet) and i think that i have the pnp in backwards. what could or is blown? did i fubar some things up or is it fixable?

i put in the 122 and the 127 the same way the 110, 115 came out.
i was thinking that my prob was starting to sound like the op with the Marshall. i will investigate and get back with you.

*****update**************
the 122 is npn
127 pnp
i believe i got them in right.


here is that section of the board

cool new layout.

anything you guys need to get this amp running?

Merry Christmas, Happy New Year.

the letters on the pic are where i have the wires connected. i have one black from power transformer and the black from the power cord going to the switch. the green wire is attached to a bolt going into the side of the amp.



i hope you guys can see this.

i only posted part of it to keep from getting in trouble with Crate. though the amp is 30 years old i doubt it would matter. that is the assembly schematic. i hope it helps.

hey heres part of the assem schem

from left to right. red wire, red, black tranny. running up right side- black ground, white-power cord
thanks phat. i hope Crate doesnt get mad

what part of the schem do you guys need?


hey on the assem schem they list the TIPs as 120 and 125 (q5 and q6). i put in 122 and 127. found this here
http://www.harmonycentral.com/products/84348
4th and 5th psot down.

if they put these TIPs in and it worked why wont mine work?

thanks for your help. i have the schem on paper and the assembly schem(this one lists the values of caps and resistors) i have this on pdf but i dont know how to post it and i dont think Crate would appreciate it very much.  i talked to Crate and they dont have much info on any of the amps from the early days.

so let me see if i understand you guys correctly

-the green wire from the power cord needs to be connected to the metal panel i have attached to the front of the amp
-i need to figure out which black wire is the main. (on the pic from the led. there is a red wire, red, black from tranny. this black wire is attached to the busy end of the fuse and a .0027uf cap(c40)

Bry- thats how i have it hooked up except for the green wire. thats attached to a screw on the side of my amp(wood)

im wondering if the green wire is why it keeps shorting out

heres the schem

I sense another Darwin Award coming soon 0:)

yes im still alive. lol. i have read the shock hazard warnings on every amp forum ive been to.

that is all the wiring. this is a better pic


the speaker wire is the output for the speakers

this is all the wiring. its all on the left side of the board. there is one black wire from the ps going to the switch and a black wire from the power cord going to the switch

hey i rehoused a cr112 and made it a cr 212. i have it wired up like this


i dont know if i have it grounded right or whats going on. i dont know anything about amps and didnt know they would be this much trouble.

i have the little black wire from the fuse going to a screw in the side of the box.

the green wire was attached to the chassis before i tore it apart. the pc board was atttached to the chassis.

i took a wire from the screw hole that attached the pc board to the metal and ran it to a screw. the green wire from the power cord is attached here also.

sorry for the late response. they never emailed me back.

oh ok thanks. ill leave it as it is. time to get dirty lol

hey im rebuilding an old cr-112. im changing out the ic's and changed out the opamp. i was wondering about the pots. the pc board has solder pads behind where the pots are soldered to the board. would putting the double pots on the board be benificial or bad? i emailed crate but they havent emailed me back. thanks

i listened to a youtube vid. not bad for a 1/2 w amp. ill get back to ya