[Hallicrafters] ALC

[Al Parker]

Hi David,
    There's a very simple ckt in the Feb. '65 CQ mag.  No additional tube.
I've been planning to use it in my HT-32, and have sent a small .pdf of
the article to several guys lately, one list member is planning to use it
in his HT-37, and might already have done it.
    I've felt for a long time that you need to be very careful to avoid
overdriving the HT-32/37's, and hope this will remedy the splatter hazard.
    Be glad to send it on to anyone else.
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
http://www.hammarlund.info

----- Original Message ----- 
From: "David C. Hallam" <dhallam at rapidsys.com>
To: "Hallicrafters List" <hallicrafters at mailman.qth.net>
Sent: Friday, July 22, 2005 8:55 AM
Subject: [Hallicrafters] ALC


> In the 1968, Vol VIII, edition of the ARRL Hints & Kinks, there is a
> schematic for an ALC circuit for a HT-32B.  It samples the grid current
of
> the finals and uses a 6FH5 to amplify and control the grid of the
driver.
> Is there anyone out there who has had any experience with this or
similar
> circuits in a HT-32B?  Are they effective?  The author of this short
article
> claimed it was effect up to a setting of about 6 on the gain control
with
> his microphone.
>
> David C. Hallam
> KC2JD
>
>
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