[R-390]

[Chuck Kembring]

Hello All,
	This may seem OT but I don't believe it is.
	I have a Nelms Clarke SDU - 300-6 military spectrum display unit that I'm
trying to get some information and learn something about.  I hope it will
connect to the IF of the R-390 or other 455 Khz IF receiver to possibly
provide a spectral display of the monitored frequency.
	I have researched it on GOOGLE and found a brief listing that tells me that
it is designed for the 1307B receiver which I can't seem to find anything
about either.
	I have powered it up and it works and I fed some 455 Khz IF into it and it
shows a spectral display. I'd like to incorporate this into my station
behind one of my R-390A's if possible.
	I'd appreciate any information on this piece and any leads on where I might
be able to obtain manuals, or copies, schematics, etc
	Thanks for the band width...
73,
Chuck Kembring	WB3LGG
Cochranville, Pa.