[R-390] Crystal Deck Switch Alignment

[chuck.rippel at cox.net]

It might work and thanks for the links !!

Here is one issue you may not have thought about.  Timing......

With the crystal and RF decks assembled and upside down, I change bands 
up one then down one.  F'instance, the switch wiper is on the 9 kc 
selection, I'll go "up" to 10 kc then back to 9 and well where how the 
switch wiper aligns to the 9kc contact.  Then, will go "down" to 8 kc 
then back to 9 again and again note how the switch wiper centers up in 
the 9 kc contact.  Will then loosen the clamp on the grea driving the 
xtal selector switches and adjust it so the switch lands in the center 
of the contact, regardless if the band switch is being turned down in 
frequency or up.  If you go in only one direction to mechanically align 
the switch, you'll find there is a bias one way of the other and the 
switch wipers will not squarely engage the contact.  There are also 4 
screws on the corner of each board on which the contacts are mounted. 
These can loosen up and need to be checked.

You may very well be able to time it looking through the "window" and 
matching the KC markings with the band on which the radio is set.  If I 
have one torn down, the method above assures its right on the money.

---
No  trees were killed to deliver this message.  However, a large number 
of electrons were terribly inconvenienced.

Chuck Rippel

On Wed, Dec 12, 2012 at 4:01 PM, ToddRoberts2001 at aol.com wrote:

   In a message dated 12/12/2012 2:24:29 P.M. Eastern Standard Time, 
chuck.rippel at cox.net writes:
You    might be able to get at 2 of the screws but as I recall, there is 
one behind    the gear train.  Not enough clearance for a right angle 
screwdriver I've    ever seen.

Chuck Rippel

Hi Chuck,
Thanks for your notes on reaching the green-headed screws  that
hold the crystal osc deck in place.

Look what I found recently on eBay :

 
http://www.ebay.com/itm/ST-TOOLS-AIRCRAFT-CLOSE-CLEARANCE-RIGHT-ANGLE-PHILLIPS-SCREWDRIVERS-/181039269574?pt=LH_DefaultDomain_0&hash=item2a26c806c6 
<http://www.ebay.com/itm/ST-TOOLS-AIRCRAFT-CLOSE-CLEARANCE-RIGHT-ANGLE-PHILLIPS-SCREWDRIVERS-/181039269574?pt=LH_DefaultDomain_0&hash=item2a26c806c6>