Yes it is normal to hear a slight hum when the Mains switch is on.  Also the left side may be slightly warm.    When the Mains switch is on, the low voltage power supply is on.    This supply is for the logic and processing.

See the IMPORTANT section on page 14 of the manual for further details.

Wonderful amp.   Love mine.

73

Bob, K4TAX



______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

Reply via email to