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Title: Collins 300FA transmitter available Post by: Bill, KD0HG on February 06, 2010, 01:30:30 PM There is a 1937 Collins 300FA 250 watt AM transmitter available for the taking.
Location is Huntsville, AL. Most tubes and original iron are included. PM me with serious inquiries and I'll pass them along to the engineer involved. Title: Re: Collins 300FA transmitter available Post by: N3DRB The Derb on February 06, 2010, 01:40:46 PM Pm'ed you. :D
Title: Re: Collins 300FA transmitter available Post by: K6IC on February 06, 2010, 02:14:04 PM WOW !! Aint she purdy !!
Thanks for the view, Vic Title: Re: Collins 300FA transmitter available Post by: KE6DF on February 06, 2010, 02:18:58 PM What kind of tubes are those looking out the windows? I can't find any info on this beast.
Title: Re: Collins 300FA transmitter available Post by: K6IC on February 06, 2010, 02:30:13 PM I dunno about the tubes, and you prob have seen this site, but just in case there is a bit o info here (and the photo looks vaguely familiar) :
http://www.oldradio.com/archives/hardware/Collins/300.htm Vic Title: Re: Collins 300FA transmitter available Post by: Bill, KD0HG on February 06, 2010, 02:51:33 PM Yup, Vic, that's where I found the foto.
For 250 watts, those might be 810s in the window. Really a pre-war classic box. Title: Re: Collins 300FA transmitter available Post by: WA3VJB on February 06, 2010, 03:40:42 PM 810s make sense, yes. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
I think John Staples, W6BM has had one of these in California 15-20 years ago. The younger sister to this transmitter is the 300-G, also a quad of 810s. The manual describes pre-war design work, indicating the model was a likely successor to the 300FA. In the manual, a service advisory discusses the choice of the 6A5 as audio driver tubes. The tube was considered obsolete after the war, and Collins issued the factory memo suggesting the 6B4-G as an alternative, at a slight degradation in noise figure. Bill if you can, try to see where this transmitter goes. |