SB-230 Conduction Cooled GI-7B by W4ZT

SB-230 Conduction Cooled GI-7B
Machined Aluminum Thermal Transfer Block

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1
Thermal transfer block mounted to the GI-7B.

2
Machined offset to interface to the Beryllium Oxide Block that transfers the heat to the heat sink on the back of the Heathkit SB-230.

3
The mounting hole is recessed in a clearance hole for the nut. The hole in the corner is drilled and tapped 6-32 for a lug to connect the parasitic suppressor.

4
This surface interfaces with the tube anode.

Beryllium Oxide can be a significant health hazard if it is not properly handled.

Be sure to read the precautions in your Heathkit SB-230 manual for handling the Beryllium Oxide block.
If you do not have the manual you can download one here: http://bama.sbc.edu/heath.htm

The Material Safety Data Sheet (MSDS) for Beryllium Oxide (BeO) is available here:
http://physchem.ox.ac.uk/MSDS/BE/beryllium_oxide.html
and
http://www.espimetals.com/msds's/berylliumoxide.pdf

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