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Title: UTC PA-307 Post by: Detroit47 on January 23, 2012, 07:05:06 PM I have an UTC PA-307 transformer and no information on it. I looked thru the bunker and came up with a zero. Does anybody have the spec's on it.
Thanks John N8QPC Title: Re: UTC PA-307 Post by: KE6DF on January 23, 2012, 07:18:48 PM Look up CG-307 -- it's same only slightly different shape.
3500 3000 2400 - 0 - 2400 3000 3500 at 300ma I have a CG-308 which is the same only 500 ma. Dave Title: Re: UTC PA-307 Post by: Detroit47 on January 23, 2012, 08:03:25 PM It is ahuge transformer for only 300 mills. I'd say at least 70 lbs.
John N8QPC Title: Re: UTC PA-307 Post by: Opcom on January 23, 2012, 08:14:35 PM These monsters are all potted as well IIRC incl. the -309, the 1A King!
Title: Re: UTC PA-307 Post by: Detroit47 on January 23, 2012, 08:21:02 PM So unless I am wrong if I set it up center tap full wave, With a choke input I'm looking at about 840 watts of power out of that thing.
3500 X .8 = 2800 2800 x .3= 840 Unless I have my head up my ____ John Title: Re: UTC PA-307 Post by: KE6DF on January 23, 2012, 09:11:55 PM So unless I am wrong if I set it up center tap full wave, With a choke input I'm looking at about 840 watts of power out of that thing. 3500 X .8 = 2800 2800 x .3= 840 Unless I have my head up my ____ John That's sounds right. Probably a little higher voltage than 2800. And it's a CCS transformer. So it will do that all day plus weekends rain or shine. Those big CG/PA transformers are very conservatively rated and high quality. Title: Re: UTC PA-307 Post by: W2VW on January 24, 2012, 01:32:40 AM As you probably already know, do not use a full wave bridge. It will ruin the xfmr.
Title: Re: UTC PA-307 Post by: Detroit47 on January 24, 2012, 04:11:19 AM All them old peices of iron were made for ct full wave with L input.
Thanks John Title: Re: UTC PA-307 Post by: K3YA on January 24, 2012, 10:04:51 AM I have a CG-306, a slightly lower voltage version, in my 4-1000 GG linear. It's connected to a full wave bridge, capacitor input supply providing about 6 KV. It's been running about 15 years now without problem, so the center tap must be pretty well insulated.
Title: Re: UTC PA-307 Post by: KE6DF on January 24, 2012, 10:48:35 AM I have a CG-306, a slightly lower voltage version, in my 4-1000 GG linear. It's connected to a full wave bridge, capacitor input supply providing about 6 KV. It's been running about 15 years now without problem, so the center tap must be pretty well insulated. Is yours a CG306W? The ones with the W suffix were designed to work in a bridge circuit. There is a 1970 UTC catalog out there on the web that states this and show both part numbers. Dave |