[Hallicrafters] SX-28A Question

[Troglodite at aol.com]

In a message dated 10/29/03 8:16:13 PM Central Standard Time, 
bell at blazenet.net writes:

> The SX-28A is on the bench and ready to be worked on !!

It's an accomplishment just to get it up on the bench. Recommend you pull the 
5Z3 before turning it over, and use a piece of 2X4 to stabilize it.
 
>  1) Who was offering the cap replacements ?  KK7IZ (??)

Yes, Lloyd made up some kits at one time, don't know if he still has them, 
but you can find his site at: www.lloydsdipsydumpster.com

The best treatise on rebuilding the SX-28 (which can also apply to the A 
model) may be found at: antiqueradio.org/hali12.htm

For the bandswitch dial stringing information and the basics of the RF 
section rebuilding check out: qsl.net/wa2whv/hallicrafters.shtml

There is also a fully annoted set of schematics floating around, if you don't 
find them give me a holler and I'll E-mail them to you.

Take your time in the RF section, be careful to use the smaller axial lead 
capacitors in this area, as some of the "orange drop" types will not fit 
properly. (See Phil's site.) I also recommend sanding down the antenna trimmer shaft 
slightly, as it has a tendency to swell with age and bind in the bearings. The 
main tuning gearbox should be cleaned and lubed if it shows any signs of 
slipping or binding. Restring the bandspread dial if you end up taking off the 
front panel. (I learned all this the hard way.)

When the tuning mechanisms are working properly, you can give the knob a 
"flip" and send it from one end to the other because of the flywheel action. It 
makes using this famous bandcruiser a delight.

I spent three years of spare time on mine, which was pretty rough when I got 
it. It was all worth it. But definitely make use of the resources on the web, 
you will save yourself a lot of time.
  
>  2) Anybody have any detailed production run info ?  I know the 28A was made
>  between 1944 and 1946;  mine is serial number 25239.

Can't help you there.

Enjoy that radio, it's a classic and will perform many years if you take your 
time and restore it carefully and correctly.

Doug Moore