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Old 21st April 2007, 10:18 PM   #1
Jamh is offline Jamh  United States
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Default pink triangle mod

Hi everyone,

Here's my venerable pink triangle modified. It uses a syrinx tonearm, and for now, a cheap cartridge which I'll probably change at some time. But it sounds so good one wonders..

Pictures to follow.

Jamh
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Old 21st April 2007, 10:19 PM   #2
Jamh is offline Jamh  United States
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view from top
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Old 21st April 2007, 10:24 PM   #3
Jamh is offline Jamh  United States
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side view. 7 layers of birch plywood glued and screwed together. The central support is tied to the 3rd plank from the bottom, then sandwiched between the others. The motor assembly is attached to the left half. Getting the height of the motor was a pain. The acrylic platter has a very small margin for it, to low and the rubber band comes off, too high and it hits the bottom of the platter. Adjustable feet would have been nice, but I went with the aq soft rubber feet.
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Old 21st April 2007, 10:26 PM   #4
Jamh is offline Jamh  United States
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Details of the motor assembly. You need a modified coat hanger to properly attach the rubber. The distance is variable for a good tension (very slight).
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Old 21st April 2007, 10:28 PM   #5
Jamh is offline Jamh  United States
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A better top view. I wanted to cut the plywood smaller, but it looked nice big so I left it. power (and speed) switch is at the top right. I precut the space from underneath.
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Old 21st April 2007, 10:31 PM   #6
Jamh is offline Jamh  United States
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The tonearm. I made the headshell from plywood. The cartridge is glued to the headshell which is glued to the arm for the best contact. They are throw away, when I pick another cartridge I'll make a new one. The wire is pure silver and continuous to the RCA plugs.
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Old 21st April 2007, 10:35 PM   #7
Jamh is offline Jamh  United States
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A close up of the acrylic platter, with the underneath cutoff for the rubber band and motor.
The final sound is much tighter than before, with much better bass, and the vibrations are well taken care of by the rubber feet and the weight of the assembly. It is also much less prone to jumping as a result of somebody walking by since the springs are gone.
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Old 22nd April 2007, 07:42 AM   #8
Cobra2 is offline Cobra2  Norway
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Thumbs up Nice!

Great job!

Arne K
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Old 25th April 2007, 04:03 PM   #9
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nice work. can we get a close up of the arm/headshell?
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Old 26th April 2007, 10:18 PM   #10
Jamh is offline Jamh  United States
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Sure, I will provide. BTW, I picked up a used metal-bodied mission cartridge that I think will work great with it. I'll report on the sound.
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