mogmaner 10 Posted June 15, 2020 Share Posted June 15, 2020 Is there any member with experience of this set, hope to restore it to working in the long run Quote Link to post Share on other sites
johnw 10 Posted March 26 Share Posted March 26 Yes, I have repaired a few of these, in my time as a Tech with Marconi Marine, and S.A.I.T. Marine. Sait called it an ER4250, but it's the same set. Main fault used to be the rectifier diodes for the P.A. valves/tubes heaters, they were directly heated types, hence the requirement for a d.c. supply. Sympton would be fuse blowing. There are two versions of this set, a channelized one for skipper-operated ships (usually under 1600 grt) and a direct frequency entry version for ships with a qualified Radio Officer. Made by Skanti of Denmark, unit runs of 115 or 220vac, (change links on main transformer), or 110 or 220VDC with a suitable motor alternator. The direct frequency versions were often fitted as a cheap update to an older pre-1970 dsb-cw/mcw station, giving 400 watts of ssb radiotelephony, without needing to replace the ship's main transmitter. Quote Link to post Share on other sites
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