[R-390] Removing Megacycle Change shaft

Jacques Fortin jacques.f at videotron.ca
Tue Jul 7 09:24:05 EDT 2026


Hello Paul,
1_ Clamp faces OUT.
2_ MHz gear mates with the INNER gear of the differential.

See pictures.

73, Jacques, VE2JFE in Montreal

A quick question for gear re-assemblers. For the MHZ gear (on MHZ shaft) Chapter 10 of manual says the clamp faces IN when assembling (page 10-15) but another section of Chapter 10 shows the clamp facing OUT. Chapter 6.3.19 also says the MHZ gear clamp faces OUT.
I ask because when the clamp is facing IN I am unable to merge the gear with the INNER gear of that big “differential assembly” (which uses the detent spring).  Regardless of clamp in or clamp out, does the MHZ gear merge with the OUTERMOST gear of that differential assembly (as does that small gear just above the MHZ gear) or does the MHz gear merge with the INNER gear of the differential assembly? It looks to be inner from the pictures, but hard to tell for sure.
Paul
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