[Boatanchors] What a Bandswitch!

[Philip Atchley]

Hi,

This morning I went ahead and pulled all the covers from the bandswitch 
and tuning capacitors of the BC-1004 to enable cleaning of the 
bandswitch.

Man!  What a bandswitch this critter has!  The shaft has 25 Cams, each a 
little larger than a quarter, 5 cams to a compartment.  Each cam is in 
the center of a rectangular piece of Bakelite that slides up and down in 
slots as the shaft is turned.  On the bottom of each piece of Bakelite 
is a metal contact strip, possibly silver plated.

Below each group of 5 cams is another piece of Bakelite containing small 
Contact fingers that mate with the contacts of the rectangular cam 
driven piece of Bakelite plate. The "fingers" on these plates connect to 
the tuned circuits below the assembly.

The entire unit is roughly 13 inches long, 2.5 inches wide and 3 inches 
high.

Altogether it appears that if you ever disassembled this mess to repair 
a broken contact or replace a cam driven Bakelite plate, it would be a 
nightmare to reassemble it properly.  I suspect that Hammarlund must 
have had some sort of Jig or "trick" to assembling it.

73 de Phil,  KO6BB
982 Different NDB's heard to date.

http://users.mercednet.com/beaconeer/
Merced, Central California, 37.3N  120.48W  CM97sh