My Continental 314R1 1 kW had a noisy cabinet fan from Grainger in it. Sounded like a jet taking off. It also has a squirrel cage blower for the 3-500Zs that pressurizes them from underneath. I replaced the cabinet flushing fan with a Rotron Caravel fan. It is a lot less noisy, but still too loud. I like your idea of running them off 110 V, as they have 220 VAC motors in the 314R1.
73 John K5PRO > Date: Fri, 25 Jul 2008 14:29:07 -0500 > From: "D. Chester" <[EMAIL PROTECTED]> > Subject: Re: [AMRadio] RE:Finaly got the "Dream Rig" .... > My Gates BC1-T was far too noisy to use in the shack near the operating > position when I first got it converted and on the air. The mod reactor > talked back like a PA speaker, the blowers sounded like a vacuum cleaner > running and the a.c. contactor relays sounded like a chain saw. > > I replaced the mod reactor with a potted unit that I had on hand, and it is > very quiet. I converted the relay circuitry so that all the control relays > run off DC. There are two blower fans in the transmitter, each with 110v > motors, connected in series to run off 220. I moved the wire to the motors > to a 110v tap, so that each motor now is running on 55 volts. They work > very well at half voltage and are whisper quiet (although still audible), > but still move plenty of air. I mounted a toggle switch to fill an extra > hole that was on the front panel, which allows me to cut the blowers > completely off. I have never had any problem with anything overheating with > the fans turned off, but in warm weather or when I operate the rig for an > extended period I usually run them, but in winter for one short QSO I > usually turn the fans off. ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
