Dear DGarretson,
Interesting solution! J
So, 65F is about 18.3C. I used to listen at those temperatures in Winter but didn’t do anything to compensate other than adjusting the VTF from e.g. 1.65g to 1.68g. At the time, the Linn Ittok was excellent for this purpose as it gave a very precise readout of the downforce (better than some gauges IMO).
At the moment I’m using the Phantom II and it doesn’t allow visibility of the VTF setting so I always have to re-check with a gauge as a precaution.
Currently, I maintain the ambient temp within reasonable limits whenever listening and leave the VTF alone.
Did your friend consider the low-power filament bulb fitted to an anglepoise holder? ;^)
(I never liked those things – just something else to catch your sleeve on and cause an expensive accident!) :D
All the best,