Re: What material to use for replacement radio back panel?
WRT to pegboard, if the supplied holes are considered too small for effective ventilation it is very simple to enlarge them.
If drilling large numbers of holes in plain board it is tedious to get them neatly aligned, but enlarging existing holes is easy.
Pegboard was popular for the rear of home constructed equipment. It will burn, but seems less flammable than real wood.
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