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What is this stuff?

 
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sonicblue



Joined: 15 Mar 2007
Posts: 935
Location: CT

PostPosted: Wed Jul 28, 2010 8:45 pm    Post subject: What is this stuff? Reply with quote

On the turrets:




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power chord hack



Joined: 31 Dec 2005
Posts: 8445
Location: LOSING IT in a windowless grey cube

PostPosted: Wed Jul 28, 2010 8:50 pm    Post subject: Reply with quote

that's just there to look pretty & let the builder know if anyone has changed any parts - in case there's a warranty issue.
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TresM (Sir)



Joined: 02 Aug 2009
Posts: 472
Location: South Carolina - Humidity Central

PostPosted: Wed Jul 28, 2010 8:51 pm    Post subject: Reply with quote

Epoxy or some kinda of paint on the lead solder? Maybe enamel?
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Vince



Joined: 10 May 2007
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Location: Decatur IL

PostPosted: Wed Jul 28, 2010 8:52 pm    Post subject: Reply with quote

Builders apply that after they have checked a circuit...
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Craigmar



Joined: 10 Mar 2006
Posts: 511
Location: Chicagoland

PostPosted: Wed Jul 28, 2010 9:06 pm    Post subject: Reply with quote

Nail polish?
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sonicblue



Joined: 15 Mar 2007
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Location: CT

PostPosted: Wed Jul 28, 2010 9:30 pm    Post subject: Reply with quote

power chord hack wrote:
that's just there to look pretty & let the builder know if anyone has changed any parts - in case there's a warranty issue.



Makes sense. And here I was thinking it had to do with mojo-conductivity or something. Laughing
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Johnson82



Joined: 27 Aug 2007
Posts: 1733
Location: New Castle, IN

PostPosted: Thu Jul 29, 2010 8:37 am    Post subject: Reply with quote

One of the guys I've seen do that just uses a colored sharpie. I might try it sometime...Then my amp will be boo-teek! Laughing
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What kind of operation is that? No sawdust...no empty beer bottles...no one is using extremely foul language...no one is spending 2 hours looking for lost tools...no dust on the bodies in the finishing room…
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Structo



Joined: 21 Nov 2004
Posts: 26415
Location: Salem, OR

PostPosted: Thu Jul 29, 2010 9:03 am    Post subject: Reply with quote

Yeah that looks like sharpie ink there.
In the early days Hiwatt and Marshall used a type of varnish on the solder joints.
This served two purposes, it shows that each solder joint was inspected and also helped keep the solder from oxidizing.

Dave Reeves of Hiwatt fame I believe was the first amp company to do that.
Later Marshall did it as well.

When Dave Reeves contracted Harry Joyce to build the amps, Harry insisted that they be built to Mil-Spec.

It is a good technique to use when checking solder joints, it shows you inspected it.
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guitarzan6000



Joined: 10 Jun 2008
Posts: 677
Location: Middle Tennessee

PostPosted: Thu Jul 29, 2010 12:28 pm    Post subject: Reply with quote

Some factories require their "Quality Control" to mark that they inspected each joint...thats my guess.
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RolandR



Joined: 03 Sep 2003
Posts: 8908
Location: Coastal Calif.

PostPosted: Fri Jul 30, 2010 11:37 am    Post subject: Reply with quote

sonicblue, are you going to leave us hanging not telling us what amp that chassis is? Shocked
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sonicblue



Joined: 15 Mar 2007
Posts: 935
Location: CT

PostPosted: Fri Jul 30, 2010 12:44 pm    Post subject: Reply with quote

Structo wrote:
Yeah that looks like sharpie ink there.
and also helped keep the solder from oxidizing.


Now that's the kind of info I was curious about. Thanks!


RolandR wrote:
sonicblue, are you going to leave us hanging not telling us what amp that chassis is?


They are tweeds made by Union Jack:

http://www.unionjackamps.com/

The cleanliness of the layouts and lead dress are what really caught my eye.
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RolandR



Joined: 03 Sep 2003
Posts: 8908
Location: Coastal Calif.

PostPosted: Fri Jul 30, 2010 12:54 pm    Post subject: Reply with quote

sonicblue wrote:
RolandR wrote:
sonicblue, are you going to leave us hanging not telling us what amp that chassis is?


They are tweeds made by Union Jack:

http://www.unionjackamps.com/

The cleanliness of the layouts and lead dress are what really caught my eye.
Nice! Razz Vince posted a Union45 JTM45 / Plexi type amp thread.
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