[Boatanchors] A Hammarlund question

[Alex Whitaker]

Al,
 
If you look at the schematic for the Scott All-Wave 23, introduced in 1936, you'll find it's very similar to the Super Pro.  It has 2 TRF stages and 4 IF stages, with seperate AVC for each.  I always wondered if one copied the other's work.  Therefore, I don't know if the Super Pro could "easily outperform" the Scott, as they are pretty much the same in the front end.  Of course, the Scott is a home entertainment set, and the Super Pro is a communications receiver.....the Scott has no BFO, but does have variable selectivity.  A correctly restored and aligned AW-23 is indeed a very good receiver.
 
73,
 
Alex
AA9XY

--- On Tue, 3/23/10, Al Klase <al at ar88.net> wrote:


From: Al Klase <al at ar88.net>
Subject: Re: [Boatanchors] A Hammarlund question
To: boatanchors at mailman.qth.net
Date: Tuesday, March 23, 2010, 12:49 AM


Hi Gerry,

Almost certainly not a Hammarlund standard product.  There was a 
Super-Pro Console SP-150, but that was one speaker and no turntable.  
The eight 45's also doesn't make a lot of sense as the Super-Pro's 
already had a 14-watt amplifier.  The Super-Pro was not introduced until 
1936.  The only earlier Hammarlund communications receiver was the 
Comet-Pro.  Bigger amp there might make sense there if you were building 
a custom setup.

The Super-Pro has a variable selectivity IF that you can open up to 12 
KHz and is a really good sounding receiver.  It would be my choice for a 
no-holds-barred custom setup in the 1930's.  Could easily outperform a 
Scott.

You can get a look at this stuff on my site:  
http://www.skywaves.ar88.net/commrx/Receiver_Time_Line.html

Al

On 3/22/2010 11:35 PM, Gerry Steffens wrote:
> Anchorites,
>
> I received the following question from another collector:
>
> "Do you know anything about a Hammarlund radio with (8) 45's in the output?
> Separate chassis and power supply with two speakers, circa 1933. Looks like
> a communications receiver, but in a wood console with a record changer."
>
> I am not a Hammarlund person.
>
> Anybody have an answer?
>
> Thanks,
>
> Gerry
>
>
>
>
>
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

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