Kingsley Posted June 5, 2016 Share Posted June 5, 2016 Recently purchased a Flying Scotsman R3284 TTS with decoder removed for Analogue use.Running it via a pulsewave controller, all seemed well until i noticed a prominent motor noise like a buzzing.Is this normal for this model? my other engine, a pullman, is whisper silent.Any enlightment would be so useful. Thank you Link to comment Share on other sites More sharing options...
poliss Posted June 5, 2016 Share Posted June 5, 2016 The buzzing is normal according to this page. http://www.rogeramos.co.uk/pwam.htm I prefer to use straight DC controllers myself. Modern motors shouldn't need PWM for slow speed running. Link to comment Share on other sites More sharing options...
poliss Posted June 5, 2016 Share Posted June 5, 2016 I replied giving a link on why this is normal, but it seems the forum software thinks the link is a photograph and needs to be moderated. Link to comment Share on other sites More sharing options...
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