ClassicTone 40-18026 Primary CT

All about iron and copper.

Moderator: VelvetGeorge

Post Reply
User avatar
wdelaney72
Senior Member
Posts: 1619
Joined: Sun Jan 22, 2006 9:04 pm
Location: Chicago Suburbs

ClassicTone 40-18026 Primary CT

Post by wdelaney72 » Thu May 22, 2014 12:04 pm

Which of the primary is the CT....Blue or white? I'd normally guess the white, but the dot by the blue is throwing me off.
http://www.classictone.net/40-18026.pdf
Walter

"There's no great thing in being a soloist. I think the hardest thing is to play together with a lot of people, and do it right." - Angus Young, 1984

User avatar
neikeel
Senior Member
Posts: 7231
Joined: Tue Dec 06, 2005 8:31 am
Location: Suffolk, England

Re: ClassicTone 40-18026 Primary CT

Post by neikeel » Thu May 22, 2014 2:48 pm

wdelaney72 wrote:Which of the primary is the CT....Blue or white? I'd normally guess the white, but the dot by the blue is throwing me off.
http://www.classictone.net/40-18026.pdf
Going by the schem on the link the white is the primary CT.

The black dot is probably referring to the 'start' of the wind being blue.
Neil

User avatar
wdelaney72
Senior Member
Posts: 1619
Joined: Sun Jan 22, 2006 9:04 pm
Location: Chicago Suburbs

Re: ClassicTone 40-18026 Primary CT

Post by wdelaney72 » Thu May 22, 2014 3:52 pm

Thanks, Neil.
So...does start of winding go to v4/5 or v6/7?
Walter

"There's no great thing in being a soloist. I think the hardest thing is to play together with a lot of people, and do it right." - Angus Young, 1984

User avatar
wdelaney72
Senior Member
Posts: 1619
Joined: Sun Jan 22, 2006 9:04 pm
Location: Chicago Suburbs

Re: ClassicTone 40-18026 Primary CT

Post by wdelaney72 » Thu May 22, 2014 4:40 pm

I did get confirmation back from ClassicTone.
White is CT
The dot indicates polarity matches between blue on primary and black on Secondary.

Still not 100% clear in which goes to V4/5 with the 82K resistor out of PI and which goes to V6/7 with the 100K resistor.

From past experience I know having these backwards will screw up the NFB and cause power tube damage.
Walter

"There's no great thing in being a soloist. I think the hardest thing is to play together with a lot of people, and do it right." - Angus Young, 1984

User avatar
neikeel
Senior Member
Posts: 7231
Joined: Tue Dec 06, 2005 8:31 am
Location: Suffolk, England

Re: ClassicTone 40-18026 Primary CT

Post by neikeel » Thu May 22, 2014 5:07 pm

Safest is build with over length wires to pin 3 make sure the polarity is correct and then dress wires to neat correct route. Heyboer seem to get it wrong quite often
Neil

User avatar
wdelaney72
Senior Member
Posts: 1619
Joined: Sun Jan 22, 2006 9:04 pm
Location: Chicago Suburbs

Re: ClassicTone 40-18026 Primary CT

Post by wdelaney72 » Thu May 22, 2014 11:44 pm

ClassicTone confirmed Red goes to V4/5 and Blue to V6/7.

We'll see if it's correct.
Walter

"There's no great thing in being a soloist. I think the hardest thing is to play together with a lot of people, and do it right." - Angus Young, 1984

Post Reply