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Title: Wiring or Schematic for SB 220 Transformer 54-237 Post by: WD8BIL on December 02, 2010, 02:29:15 PM I'd like to see the wiring diagram for this tranny I have.
It has the SB 220 p/n stamped on it but I have no info. A 1KW power tranny would be nice. Buddly Title: Re: Wiring or Schematic for SB 220 Transformer 54-237 Post by: Ralph W3GL on December 02, 2010, 03:16:25 PM Bud, That transformer has dual tapped primary's for 115/230 input giving it a 500 volt boost when switching from "CW/TUNE" to "SSB" mode. It is designed for voltage doubler service. The color codes are as follows: Primary 1 : low end: Black tap: Blk/Yellow high: Yellow " 2 : " : Black/Green " : Blk/Red " : Blue Secondary: High end: Red Low end: Red/Yellow Wire both primary's (full windings) for 2500 volts in doubler service Switch to taps for 3KV doubler output. There's a schematic at "www.w6kan.com/sb220.html"... It's a nice piece for it's purpose... Title: Re: Wiring or Schematic for SB 220 Transformer 54-237 Post by: WD8BIL on December 02, 2010, 03:58:33 PM Thanks Ralph. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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