Heathkit RF Signal Generators (?)

[Alan KB7MBI]

There appears to be several model numbers for Heathkit RF signal generators.
Are they all pretty equivalent in quality and performance or is there one or
two that at the top of the list?
(IG-42, IG-102, IG 5242, RF-1, SG-5, SG-6, SG-7)
Thanks in advance for your assistance

Alan KB7MBI in Woodinville, WA
FISTS 5702  Proud member of ARRL
___ ___ . . .      . . . ___ ___   DIT DIT

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