开云体育

Life got busy .

And I actually haven't tried the fins yet.

I did some test runs on my fan modified QMX HB and my fan modified QDX HB. I found that I could safely push 50% duty cycle WSPR cycles, at 4w and 5W outputs respectively, for over an hour on both if I elevated the units about 1 inch above my worktable. ( Sitting just a bit of the short edges on? two stacks of small Post-It notes. ) Saw worst cases of an extra 4-5 or so degrees of exhaust heat rise.

I also found that the exhaust air would return to the normal after idling in RX within about 4 to 6 minutes.?

My fans are just small 25x25 mm units. Don't move a lot of air, but are super quiet, only use about 28ma, and do make a difference compared to being fully closed up and sitting flat on the worktable.?

If just in RX,? The QMX appears to run about 3 degrees C above the surrounding ambient air ( ambient being around 24 to 27 C) while the QDX runs about 2 degrees above. This is in the fan on configurations.?

I want to repeat those tests with an LM35 sensor attached with some tiny drops of super glue to the hold down washer for the PA xstrs with both fan on and fan off conditions. This may give a better indication of what's happening temperature wise closer to the little heat buggers.?

Then I may try the fins on the bottom of the case idea I originally envisioned. Especially with some JS8 scenarios.

Fun, fun, fun ....

GREG