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[AMPS] Technical Question #1

To: <amps@contesting.com>
Subject: [AMPS] Technical Question #1
From: km1h@juno.com (km1h@juno.com)
Date: Thu, 21 May 1998 11:55:24 EDT
On Wed, 20 May 1998 19:40:12 -0500 bob alexander <realex@flash.net>
writes:
>Karl,
>The main cause of damage to the band switch in the SB220 is
>Parasitics!  These parasitics get into the fingers of the operator
>who is trying to tune the SB220 and causes him/her to rotate the
>band switch instead of the loading cap while full drive is applied.
>The resulting arcing and sparking converts part of the switch to a gas
>which is inhaled by the operator who has just had a sudden rather
>sharp intake of breath.  This gas remains in the operators system
>for years, even decades, and eventually causes the operator to do 
>the same thing.  
>Most operators never realize the physical layout of the SB220
>front panal is the primary cause of these parasitic infections of
>the fingers.
>
>Seriously, show me a longtime SB220 owner who says this has never
>happened to him and Ill show you someone with a 20 year old virtually
>unused amp.
>73, Bob, W5AH


The main reason the old K1OX multi-multi contest station removed the
bandswitch knob from his SB-220's Bob!  Some operators do strange things
at 2AM.

73  Carl  KM1H

>

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