[R-390] Gear train help needed - GOT IT!

[Bill Coleman N2BC]

Re. My earlier cry for help...

I just needed to walk away from it for a while.

I got back to basics... I loosened the geneva drive gear and the bandswitch 
shaft.  Then I manually operated the geneva fully CW and CCW observing the 
intermittent drive.  Worked perfectly.  I then set the geneva fully CCW and 
the MHZ to "0" and tightened the geneva drive clamp.  Placed MHZ to "7", 
manually rotated the bandswitch to it's proper place & locked it down.

Worked like a champ, when the bandswitch needs to be moved it is getting a 
'full twist' from the geneva drive at the correct time.

In the immortal words of Emily Litella... "Never mind."


Happy weekend!   73, Bill N2BC




----- Original Message ----- 
From: "Bill Coleman N2BC" <n2bc at stny.rr.com>
To: <R-390 at mailman.qth.net>
Sent: Saturday, July 19, 2008 6:56 PM
Subject: [R-390] Gear train help needed


Greetings,

I'm having trouble getting the geneva drive in sync.  For example:  on the 
switch between 7 and 8 mHz, about 80% of the rotation of the bandswitch 
happens going from 7 to 8 mHz, another 20% going from 8 to 9 mHz.  I'm just 
guessing at the percentage, the point is at the next higher (or lower) mHz 
position there's a bit of additional rotation on the bandswitch.

I've got he latest Y2K manual - great write-up.  Just no joy as jet.

When I took the gear train apart, I left the geneva assembly in place as 
recommended.

Hints??

THX & 73, Bill    N2BC