MagneQuest Forum

RE: Humming Hammond

63.164.202.130

In Reply to: RE: Humming Hammond posted by Paul Joppa on July 31, 2007 at 17:03:03

Another method to reduce the primary voltage by a few volts is to connect one of the Keystone (or similar) NTC Thermistor, Inrush Current Limiters in series with the fuse & power switch on the "line" side of the primary circuit. This is especially helpful when using SS rectification, as it eliminates the power-on "slam". This isn't as slow a "warm-up" as a tube rectifier offers, but it still makes for a "soft" start.
I use their CL-90 most oftem, it's a good match for amps up to about 35-40 watts total. These are available at Mouser and other suppliers.
/ed B in NH
real radios glow in the dark

Keystone NTC Thermistors Type CL (Open in New Window)

Edits: 08/03/07

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RE: Humming Hammond - VoltSecond 14:43:50 08/05/07 (0)

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