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

Mike Bracey mikebracey at att.net
Wed Nov 22 17:17:32 EST 2023 

 

   
  Hi Mark,
Just about everything you need to know about Hammarlund Super Pro's is here.   The Incredible Hammarlund Super Pro

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The Incredible Hammarlund Super Pro


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73, Mike KE5YTV



    On Wednesday, November 22, 2023 at 12:59:44 AM CST, Richard Knoppow <dickburk at ix.netcom.com> wrote:  
 
     The drawings show three IF stages with variable coils. I wonder if 
that is correct since the later ones had only two and it seems to have 
been enough. The general appearance of the drawings are the same as for 
the later models with octal tubes.

On 11/21/2023 8:36 PM, Bob Young wrote:
> The SP-10 was Hammarlund first Super Pro I believe.
> 
> Bob
> kb1okl
> 
> 
> 
> [https://www.skywaves.ar88.net/commrx/Hammarlumd/SP-10/SP_front.jpg]
> 
> 
> https://www.skywaves.ar88.net/commrx/Hammarlumd/SP-10/Super-Pro_SP-10.html
> 
> ________________________________
> From: hammarlund-bounces at mailman.qth.net <hammarlund-bounces at mailman.qth.net> on behalf of Richard Knoppow <dickburk at ix.netcom.com>
> Sent: Tuesday, November 21, 2023 10:22 PM
> To: hammarlund at mailman.qth.net <hammarlund at mailman.qth.net>
> Subject: Re: [Hammarlund] The List; It’s Alive! ISO SP-10 Front Panel
> 
>      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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>>
>>
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> 
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> SKCC 19998
> ______________________________________________________________
> Hammarlund mailing list
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> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Hammarlund at mailman.qth.net
> 
> List Administrator: Gary Harmon, K5JWK
> ** For Assistance: gharmon at idworld.net **
> 
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Hammarlund mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hammarlund
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Hammarlund at mailman.qth.net
> 
> List Administrator: Gary Harmon, K5JWK
> ** For Assistance: gharmon at idworld.net **
> 
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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Post: mailto:Hammarlund at mailman.qth.net

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** For Assistance: gharmon at idworld.net **


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