Heyboer 1202-118 Schematic Question

guitarcal · Post by **guitarcal** » Fri Mar 11, 2016 5:59 pm

Hi all,

This is my first post! The information on this forum is awesome!

I am installing the Heyboer 1202-118 PT in my 50 watt build.
The Metro Amp build schematic mentions a black, brown, orange, and yellow wire for power. Unfortunately, my transformer has no orange wire.

I have 1 solid black wire and the remaining 3 wires have a white stripe, a yellow stripe, and a brown stripe.

Can I assume the solid black wire is the common wire and the brown stripe wire is the 120 V AC supply? If this is the case I would cut and shrink tube the remaining wires.

Thanks!

axeman · Post by **axeman** » Fri Mar 11, 2016 6:44 pm

Do you mean 1202-118?

guitarcal · Post by **guitarcal** » Fri Mar 11, 2016 7:02 pm

axeman wrote:Do you mean 1202-118?

Yes, the 1202-118. Thanks, I made the edit above.

axeman · Post by **axeman** » Fri Mar 11, 2016 7:07 pm

Where do you live?

guitarcal · Post by **guitarcal** » Fri Mar 11, 2016 7:29 pm

axeman wrote:Where do you live?

Oklahoma, interested in the 120 V AC supply.

axeman · Post by **axeman** » Fri Mar 11, 2016 7:44 pm

Yes the Brown Lead wire is for 120v. The Black is 100vac.

Does this help.

guitarcal · Post by **guitarcal** » Fri Mar 11, 2016 7:46 pm

axeman wrote:Yes the Brown Lead wire is for 120v. The Black is 100vac.
Does this help.

I believe so. So is the Black 100 vac the same as the Common Black George references in his 50 watt build guide?

axeman · Post by **axeman** » Fri Mar 11, 2016 7:56 pm

On what page? vac goes to the fuse if I remember correctly.

guitarcal · Post by **guitarcal** » Fri Mar 11, 2016 8:00 pm

axeman wrote:On what page? vac goes to the fuse if I remember correctly.

Bottom of page 11, it mentions the common black wire to the fuse.
Appreciate your quick responses!

axeman · Post by **axeman** » Fri Mar 11, 2016 8:03 pm

Ok common does mean "ground" but on your PT it goes to Main Fuse.

guitarcal · Post by **guitarcal** » Sat Mar 12, 2016 10:17 pm

axeman wrote:Ok common does mean "ground" but on your PT it goes to Main Fuse.

Alright, wired up everything and began checking voltages. For my heater voltage, I am receiving 1.3V AC on the tube socket terminals. The instructions say I should be around 3.15.

Is it possible the brown stripped wire is not rated for 120V on this power transformer?

axeman · Post by **axeman** » Sat Mar 12, 2016 10:24 pm

No the brown wire is for 120v. Maybe you did something wrong, post pictures. Do you have a Layout to follow?

guitarcal · Post by **guitarcal** » Sat Mar 12, 2016 10:34 pm

axeman wrote:No the brown wire is for 120v. Maybe you did something wrong, post pictures. Do you have a Layout to follow?

Probably true... Yes, I followed the 50 watt build.

Here are a few pics of the power sections:
http://i1131.photobucket.com/albums/m55 ... G_1362.jpg
http://i1131.photobucket.com/albums/m55 ... G_1360.jpg
http://i1131.photobucket.com/albums/m55 ... G_1358.jpg

axeman · Post by **axeman** » Sat Mar 12, 2016 10:40 pm

Check the ground for the heaters, make sure the work is solid, then make sure that the color you chose that goes to pin 7 goes to every pin 7 of the power tube sockets and every pin 2 wire goes to every pin 2 of the power tubes, and the same with the pre amp tube sockets but obviously it's pin 4 and 5 together and then pin 9. Yah that reading is low
Send me your email so I can send some Layouts to follow.

guitarcal · Post by **guitarcal** » Mon Mar 14, 2016 10:30 am

axeman wrote:No the brown wire is for 120v. Maybe you did something wrong, post pictures. Do you have a Layout to follow?

Finally figured this one out. Heyboer used their internal color codes for this transformer build.
Black - 0, black/white - 120, black/yellow - 220, black/red - 240. The black/red looked brown to me, which is why i assumed this was their 120.

I connected the black/white and get 2.9 - 3V at the heaters. Still a bit low, but from what I read its fine. I tested everything else and fired up the amp, everything sounds great.

Thanks axeman for sending the schematics and the help.

Metropoulos Forum

Heyboer 1202-118 Schematic Question

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