[AMPS] AL1500

Ian White, G3SEK Ian White, G3SEK" <g3sek@ifwtech.com
Wed, 5 Dec 2001 12:41:02 +0000

2 wrote:
>Whenever the anode potential is not substantially more positive {more 
>attractive} than the grid, most of the cathode current will go to the 
>grid.  Thus, the transistor that that is used to stop the flow of 
>grid-I during a parasite should have a substantial current rating. 
>However, the transistor the designer typically selects has a 1 - 2 
>ampere rating. Thus, when the wolf comes to the door with 40 or so 
>amperes, the transistor shorts and does not interrupt the flow of grid 
>current in time.

We're still waiting for a specific reference to the circuit that has 
this design flaw.

73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                           'In Practice' columnist for RadCom (RSGB)

FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com