[ARC5] Help on BC-459-A Transmitter

[Neil Barnett]

> Help. I have a BC-459-A Command Transmitter I just got off eBay that has a 
> bad tuning capacitor. I don't have any idea how it lost the little ball 
> bearings around the shaft and the clear plastic insulating balls on the 
> fixed set of fins, but both set of fins are touching all the way around. I 
> have a junk transmitter with a very nice tuning capacitor in it. Can they 
> be removed and switched easily? It is the one that connects to the dial 
> and the tuning shaft to the rear capacitor. Is there instructions in any 
> manual for this? Has anyone done this before that can give me some 
> instructions and advice?
>
> It looks like 4 screws to the chassis. Two quick release thing of a magigs 
> on the front inside and one soldered wire. It is the Tuning shaft and knob 
> assembly that has me worried. I would love to take apart only what is 
> necessary so I won't wreck it. Any help here? Thanks.
>
> Floyd


Floyd
1. Attempt the job only if you have the correct tools for
unscrewing the grub screws in the knob and the lock screws
in the flexible shaft couplings. All other tools will ruin these
screws.

2. From memory, the second capacitor from the front which
is the 1625 tank "calibrate" capacitor (which is fix-locked)
must be removed before the front one and its dial gears can
be removed. Be prepared to have to unsolder and remove it.

3. When re-fitting the dial, be careful to fit it onto the tiny
locating pin before tightening the nut. It's easy to forget this
pin and you will destroy it (and the VFO freq/dial relationship)
if you don't seat the dial onto the pin.

73 de Neil ZL1ANM