[R-390] R-390A ....more AGC

[Jim Shorney]

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On Sat, 22 Feb 2003 12:39:11 -0600, windy10605@juno.com wrote:

>Got tired of the signal blanking and carrier meter kick when you 
>switch from "Low" to "Med" AGC. Installed a 10V MOV from 
>the AGC terminal screw to a ground screw on the back of the unit.
>Minimal kick and blanking and no ill effects observed. Would have
>liked a nominal 10V DC MOV but the smallest one Fry's has is the 
>10V MOV which has a nominal 18V DC clip level. Lot better than
>the over -100V spike when you dump the 2mfd capacitor. Zeners
>were a tradeoff between peak current capability and minimum
>series resistance. Never found a good match. At least MOVs have
>no problem with that level of energy.


How about this?

http://www.littelfuse.com/ASP/Search/Detail.asp?ID=522

Bidirectional or unidirectional silicon avalanche surge surpressors,
1500w.  1.5KE10CA are under a buck in single quantities from Digikey. 
Longer life and probably faster than a MOV.

- --
Jim Shorney      -->.<--Put complaints in this box
jshorney@inebraska.com
nu0c@amsat.org
Ham Radio NU0C
Lincoln, NE, USA
EN10PT
http://incolor.inetnebr.com/jshorney/
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