[Hammarlund] The List; It’s Alive! ISO SP-10 Front Panel

[Richard Knoppow]

    Try the photo. I am not sure what model you are talking about. The 
SP-10 is an SSB converter which works on many receivers. I think perhaps 
you mean the SP-110, an early Super-Pro. Some of these receivers, I 
think the early ones, have wrinkle finish paint, later ones are smooth 
finish. I have a BC-779, a military version of the airways model. I 
refinished the front panel in glossy black many years ago. The labeling 
is engraved so can be renewed with lacquer stick. Wrinkle paint is 
available in rattle cans. Getting the right amount of wrinkle requires 
drying with some heat, not a lot, maybe 150F. You can test small samples 
to find the right heat for baking.
    The receiver is not difficult to work on except for the tuning unit. 
I did disassemble and clean it but that was long ago and I don't think a 
lot of disassembly is necessary. Be careful of the adjustable IF cans. 
They have a mechanism underneath for moving one of the coils up and 
down. When restored these are very good receivers.
    The drift can be mitigated by adding about a 5 picofarad N-1500 cap 
across the oscillator capacitor. That is what Hammarlund added to the 
late SP-400. They may be difficult to find so an N-750 will do. The TC 
cap mounts under the left side cover of the tuning unit, easy to get to.
    Don't toss it and congratulations for saving it. There were a couple 
of different power supplies but they are similar. The early Super-Pro 
had a connection for a loudspeaker field coil which worked as a power 
supply choke. Not found on later versions.

On 11/21/2023 4:07 PM, Mark Dinsmore wrote:
> Hi Folks,
> 
> I recently picked up (barely) an SP-10 that was on the way to the scrap yard along with its power supply. Both in pretty rough shape.  After giving them a bath, it just might be restorable.
> 
> The biggest obstacle for me will be finding a replacement for the front panel.  As they were wrinkle black painted aluminum with engraved labeling through the paint, I know I  don’t have the ability to restore this panel.
> 
> I can try to attach a photo.  I can’t remember if this list accepts attachments or not, if it doesn’t and you think you might have a panel like this let me know and we’ll go from there.
> 
> Thanks, Mark Dinsmore. K7MD
> 
> 
> 
> Sent from my iPhone
> 
> 
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-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998