October 13th 06, 03:32 PM
posted to rec.radio.amateur.boatanchors
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external usenet poster
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First recorded activity by RadioBanter: Sep 2006
Posts: 14
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HAMMARLUND SP-400 Receiver
BC 779
"Richard Knoppow" wrote in message
link.net...
"North Lake Audio" wrote in message
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Sold from 1946 * 1948.
Good condition.
http://cgi.ebay.com/ws/eBayISAPI.dll...9134&ssPa geN
ame=STRK:MESE:IT&ih=005
Thanks,
Steve
This is NOT a Super-Pro 400, it is an earlier receiver, looks like
military surplus SP-200. The exact model depends on the frequency range.
The missing label on the front was the military identifier. Three
frequency ranges were offered 535KC to 20Mc (standard) 1250 KC to 40 Mc,
and a version covering 100kc to 400Kc on the two lower bands and 2.5 mc to
20Mc on the upper three. There is a fair amount of material on the web
which will alow identifying the particular model. If the original bottom
cover is present it may have a schematic diagram pasted to the inside
which will also identify the model. A large number of these receivers were
built under contract by Howard Radio Co. The SP-200 series was replace by
the SP-400 in 1946. The SP-400 has continuous coverage from 535Khz to
32Mhz. In addition, the band indication is engraved or printed on the
front panel rather than on the skirt of the bandswitch knob. I wonder if
the power supply is around someplace. They are not impossible to build but
the original would be nice. Most military receivers came with rack mount
supplies.
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Richard Knoppow
Los Angeles, CA, USA
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