SPR-4 variations

Authored by VE3EFJ
10.2 SPR-4 VARIATIONS

The SPR-4 also had some variations from the desk top model marketed as marine back up receivers known as the RR-1 and RR-2 receivers.

	The RR-1 was a rack mount white SPR-4.
	The RR-2 was an RR-1 with a 500kHz step synthesizer (consider it an RR-1/SPR-4 with an FS-4).

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Last updated on: 24 Dec 2011