Re: 7L14 Bad first mixer?
It certainly gets hot but so does my 7D20. My failed mixer was degraded diodes.
I believe there is a DC blocking module before the mixer if my memory is right.
This is the best site on the subject. http://www.firstpr.com.au/tequip/7L14/
Was working good until I fried my 7L14 by plugging in a connector in the wrong position and backwards, oops!
Two connectors had the same number of pins and color.
Still looking for one.