UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - MW hum - higher frequencies only

Skywave · 26th Jun 2021, 4:17 pm

Hmm, yes: a 3-phase motor could well be the source. Bearing in mind all that electrical machinery they are using, does cause me wonder if they have power factor correction installed - which, of course, may be quite irrelevant!

Al.

26th Jun 2021, 4:17 pm	#19
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: MW hum - higher frequencies only - 200Hz Hmm, yes: a 3-phase motor could well be the source. Bearing in mind all that electrical machinery they are using, does cause me wonder if they have power factor correction installed - which, of course, may be quite irrelevant! Al.