S-38 vs. HW-16

[Bradley S. Stone]

Wow! Respecting Bob & Sandy's opinions as I do, I stand corrected.  The RA-7
must truly be an phenomenal  regenerative.  I wonder how it must have been
in the pre-war days before the RCA RBB/RBC, where the enemy could home in on
the emissions from those regens?

Sorry for the topical excursion...
    73 all,
    Brad, NB9M
    webmaster at hallicrafters.org
    www.hallicrafters.org

-----Original Message-----
From: Robert Nickels <ranickel at mwci.net>
To: Bradley S. Stone <nb9m at RELIABLE-NET.NET>
Date: Tuesday, May 04, 1999 8:45 PM
Subject: Re: Re: S-38 vs. HW-16


>Hi Brad,
>
>No flame, but thing about it - - the reason for a superhet design was to
>convert down to a lower freq. where LC  circuits could provide needed
>selectivity.  Simple superhets like the S-38 have 1-2 IF cans, not much
>selectivity is possible with such a design.   A well-designed regen set
like
>the RAL-7 Sandy mentioned had to take a different approach.  Very rugged
and
>stable local oscillator (because it ran on the operating frequency), tuned
>RF stages for sensitivity and to make sure the regenerative detector didn't
>radiate out the antenna, and often audio filters for added selectivity.
>All features lacking on the S-38 variety receivers.  If you ever have the
>chance to take a look (or own) an RAL, you'll see the benefits of "massive
>construction".  The same was true of the simpler regens, like the famed
>National SW-3 and the Frank Jones sets which still emphasized the need for
>sturdy, quality construction to mitigate against the inherent weaknesses of
>the regen design.   My RAL/RAK regen sets will tune SSB as nice as you
>please, and you can bang on the cabinet without affecting the audio pitch.
>So yes, regens can be sensitive, stable, and selective - IF they are
>designed and built right.
>
>IMHO, superhets made it easier in many ways, to get the desired level of
>performance.   But the regen design, properly implemented, is capable of
>truly amazing performance, even with a couple of clip leads for an antenna!
>
>73, Bob W9RAN
>
>
>-----Original Message-----
>From: Bradley S. Stone <nb9m at RELIABLE-NET.NET>
>To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
>Date: Tuesday, May 04, 1999 5:40 PM
>Subject: Re: S-38 vs. HW-16
>
>
>>Aw, come now!  I never thought I'd live to see the day that someone would
>>say that a regen would "run circles around" a true superhet.  As if that
>>claim were by itself amazing, the S-38 was quite sensitive.  It wasn't
very
>>stable, and had problems with selectivity and images (especially at higher
>>frequencies.)   Will the claim now be made that the regenerative was also
>>stable and selective?
>>    73
>>    Brad, NB9M
>>    webmaster at hallicrafters.org
>>    www.hallicrafters.org
>>
>>-----Original Message-----
>>From: Sandy Blaize <ebjr at WORLDNET.ATT.NET>
>>To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
>>Date: Tuesday, May 04, 1999 2:12 PM
>>Subject: Re: S-38 vs. HW-16
>>
>>
>>>    The old S-38 or most of the simple superhets are quite deaf.
>>>
>>>    My one tube Frank Jones 1936 regen. receiver (single '19
>>>tube) will run
>>>rings around the S-38 and have some excess!  Too bad no one built
>>>a
>>>scaled down shrunken version of the RCA "RAL-7" receiver!  Two
>>>TRF
>>>stages, regen. detector and two AF stages.  Excellent set, even
>>>by today's
>>>standards......if you don't mind keeping a "logging scale
>>>settings" book!
>>>
>>>73,
>>>Sandy W5TVW
>>>
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>>
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>
>

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