[Amps] Grounded Grid (Screen) 4CX250B power gain

[Carl]

Amplifing the rectified RF is an easy way to increase the ALC sensitivity. 
The NCL-2000 used a voltage doubler that was quite effective. Ive also seen 
more elaborate circuits.

Carl
KM1H

----- Original Message ----- 
From: <donroden at hiwaay.net>
To: <amps at contesting.com>
Sent: Thursday, July 23, 2009 12:08 PM
Subject: Re: [Amps] Grounded Grid (Screen) 4CX250B power gain


> One gets away / some get stopped / one gets away / some get stopped
> ( repeat-repeat-repeat ).
>
> I would prefer an ALC with a variable conntrol that could be adjusted
> to limit the exciter *JUST BEFORE* grid current flow.   But you have
> to flow some grid current to find that point.  The 30S-1's ALC reacts
> fast enough to keep things within reason.
>
> Don WA4NPL
>
>
>
>
> Quoting "Bill, W6WRT" <dezrat1242 at yahoo.com>:
>
>> ORIGINAL MESSAGE:
>>
>> On Wed, 22 Jul 2009 12:21:32 -0500, donroden at hiwaay.net wrote:
>>
>>> I always thought that the ALC circuit was
>>> like shutting the gate after the horses had already run through.....
>>
>> REPLY:
>>
>> More like shutting the gate after the first horse has gone through and
>> preventing the rest of the herd from escaping.
>>
>> Having said that however, I am not a believer in the use of ALC.
>>
>> 73, Bill W6WRT
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>
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