Wiring Diagram for a 100 watt PT

Metal Handles · Post by **Metal Handles** » Tue Dec 26, 2006 10:39 pm

I want to double check my thoughts before the point of no return.
A laydown Heyboer 100 watt 1203-80-1 (putting together a superbass with '67 era specs).

Left side: (top to bottom)
COM
120
220
240
16AWG solid green
16AWG green with yellow stripe
16AWG solid green
22AWG solid blue
22AWG solid blue

Right side: (top to bottom)
178
152
COM
152
178

Could somebody review the connection points for each of these wires?
I would really appreciate it!

Metal Handles · Post by **Metal Handles** » Thu Dec 28, 2006 11:19 am

I found a few answers, still a few questions though. How's this look?

(Heyboer laydown for 10,000 series superbass circuit. Serial number 1203-80-1 HTS 8205-1 9960646)

Left side:
COM run an orange wire from tab to the mains 4 amp fuse holder
120 run a red wire from tab to the lower two terminals of the power
switch
220 leave tab on tranny alone
240 leave tab on tranny alone

16AWG green- twist with other green 16 AWG wire then to pin 2 or 7 of V7
16AWG green/yellow stripe- to ground lug of nearby filter cap.
16AWG green- twist with other green 16 guage wire then to pin 7 or 2 of V7
22AWG blue- to bias supply on main board
22AWG blue- bias winding common tap, to chassis lug

Right side:
178 ?
152 leave tab on tranny alone?
COM ground to a lug on the chassis?
152 leave tab on tranny alone?
178 ?

The right side is not so clear to me right now. Thanks in advance for any help!

Flames1950 · Post by **Flames1950** » Thu Dec 28, 2006 4:51 pm

You've got the left side fine. The right side will run either the two 178 taps or the two 152 taps -- the 178's giving you a higher final B+ voltage than the 152's -- a blue wire from each to the AC sides of your bridge rectifier. I think for the '67 you'll want to take the center tap to the junction of your two mains filter caps (the "+" of the first joining the "-" of the second) but you might check Dan's '67 layout to be sure, but I'm pretty sure it should be a voltage doubler arrangement and hook between those caps.

Metal Handles · Post by **Metal Handles** » Thu Dec 28, 2006 5:10 pm

Thanks Flames.

Metal Handles · Post by **Metal Handles** » Fri Dec 29, 2006 3:12 pm

OK, after reviewing Dan's layout, do I run the two B+ (178 taps) to the top two tabs on the standby switch? (which then runs to the power board)

If so, I assume there is no difference which of the two B+ (aka HV Secondaries?) wires go to either of the top two standby switch tabs.

Flames1950 · Post by **Flames1950** » Fri Dec 29, 2006 4:53 pm

Metal Handles wrote:OK, after reviewing Dan's layout, do I run the two B+ (178 taps) to the top two tabs on the standby switch? (which then runs to the power board)

If so, I assume there is no difference which of the two B+ (aka HV Secondaries?) wires go to either of the top two standby switch tabs.

Yes, and it makes no difference which goes where.

Metal Handles · Post by **Metal Handles** » Fri Dec 29, 2006 5:06 pm

Nice. Thanks again,

And I may check with you when I get to the board about some tweak values. I'm sure you probably know a few tricks.

Herec · Post by **Herec** » Sat Dec 30, 2006 12:05 pm

Does it matter which bias wire goes where, like which one goes to the board and which one to ground with this tranny.

Metal Handles · Post by **Metal Handles** » Sat Dec 30, 2006 3:03 pm

Herec wrote:Does it matter which bias wire goes where, like which one goes to the board and which one to ground with this tranny.

As far as I understand it, they are interchangable.

novosibir · Post by **novosibir** » Sat Dec 30, 2006 4:49 pm

Herec wrote:Does it matter which bias wire goes where, like which one goes to the board and which one to ground with this tranny.

Doesn't matter!

Larry

Metropoulos Forum

Wiring Diagram for a 100 watt PT

Wiring Diagram for a 100 watt PT

Uh oh!