12-series project

[Vegard]

Finally going to the workbench again!
Im waiting on the parts from Metro, but today I recieved the very beautiful boards from BrianH !!
I also have some mustards and a 100pF RS cap.

http://i267.photobucket.com/albums/ii28 ... CI0156.jpg" onclick="window.open(this.href);return false;

[vanhalen5150]

Those boards look awesome. Those turrets are so easy to work with as well. Wish I could get my hands on some of those Mustards as well.

[Strat78]

OK, I got my 68 kit and I feel like an 12-18 year old again but, OMG, I've got solder block, where do I begin this build? I'll print the 100w plexi directions and go from there. Any advise on getting this thing rolling would be great?

[Vegard]

Its a good idea to look at the 100w kit instructions. Follow the steps in the instructions, but look at the 68' chassis layout.

[vanhalen5150]

OK, I got my 68 kit and I feel like an 12-18 year old again but, OMG, I've got solder block, where do I begin this build? I'll print the 100w plexi directions and go from there. Any advise on getting this thing rolling would be great?

Download the NightOwl instructions. They were fairly helpfull for the 68.

[Vegard]

Almost done, waiting for the 3PDT standby switch and a few other parts!

http://i267.photobucket.com/albums/ii28 ... CI0147.jpg" onclick="window.open(this.href);return false;
http://i267.photobucket.com/albums/ii28 ... CI0150.jpg" onclick="window.open(this.href);return false;
http://i267.photobucket.com/albums/ii28 ... CI0153.jpg" onclick="window.open(this.href);return false;
http://i267.photobucket.com/albums/ii28 ... CI0154.jpg" onclick="window.open(this.href);return false;
http://i267.photobucket.com/albums/ii28 ... CI0159.jpg" onclick="window.open(this.href);return false;
http://i267.photobucket.com/albums/ii28 ... CI0160.jpg" onclick="window.open(this.href);return false;

[shakti]

Excellent work, Vegard! I have some 470pF RS silver micas to sell if you're interested, for the tone stack and mixer resistor.

[VelvetGeorge]

Looks great Vegard!

One note: I think you have a 10k 2W MO in V2, that should be a 100k. It looks like brown-black-orange in the last pic. I'd suggest using Allen Bradley or a carbon film there personally.

george

[Vegard]

Thanks George!

Haha, you are absolutley right. Thanks for noticing!

[Vegard]

Help!


When I flip the power switch, one of the 4 bolts that attaches the PT to the chassis turns burning hot just in a few seconds. Anyone know why that can happen? It is the bolt on the primaryside closest to the blue biaswires.

Also, the red lamp dont work correctly. When I power up the amp there is only a very weak light, and the light is there for some seconds even after I have turned off the amp.
It is a 120V lamp. I have 230V from the wall, so I have connected the lamp to 120V tap and COM on the secondary, PT. Is that correct?

[Vegard]

Maybe its not a good idea to use a 120V lamp on this amp, since the 100uF cap also is connected to COM? Maybe that is why the lamp still lit after the amp is turned off...

[Roe]

double check wiring of the power supply

[Vegard]

Problem fixed : )

[vanhalen5150]

Problem fixed : )

What was the problem?

[Vegard]

For the lamp, I need a 6V and not a 120V.
On the PT, i dont know... the problem fixed itself over the night, hehe. The amp works fine now : )