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- Cosmic Ampworks
ii. Drill hole 4 just above the tube socket solder connections of pin 9 (Figures 23 and 24).
Make sure not to accidentally damage the wire bridge on top of the board! Ideally, also
interrupt the circuit board trace in go, because the heater traces spread hum throughout
the circuit in their stock layout.
Tape
Figure 19. Drill four holes in the heatsink (locations indicated with white circles), for attaching it to the chassis with two tie wraps. Don't
worry about the heat, because the heatsink has such a large capacity that its temperature will not noticeably increase.
Figure 20. Drill five holes in the bottom of the chassis for attaching the heat sink that cools voltage regulator L7912 (viewed from inside the
chassis). Hole no. 1 needs be wide enough to accommodate the 3 wires connecting to L7912 – smoothen its edges with a file. The other
holes should be wide enough for attaching the heat sink with two tie wraps.
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www.cosmicampworks.com
- The Ultimate Harley Benton GA15 Mod Kit- Version 1.4 - 200127
®
3
2
1
18
Nut and bolt for
attaching voltage
regulator to heatsink
(wire – ignore)
4
5
Dedicated to the Advancement of Stellar Tone!
(powertube
socket)
(front of chassis)
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