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Here is the schematic for the input attenuator. It is controlled by the logic that switches the bandpass filters.
Date: 06/30/2008
Views: 688
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Artic 5 thermal compound, and how I applied it.
Date: 06/30/2008
Views: 467
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Caddock MP-930 resistors are mounted with 4-40 screws into the same heat spreaders that the RF amplifiers are mounted to.
Date: 06/30/2008
Views: 1578
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Trial mounting the perf board for the prototype attenuator controller. Relays are JW2SN-12V SPDT; BNC input (70 watts), SMA out
Date: 06/30/2008
Views: 298
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The control board, ready to be mounted to the resistors.
Date: 06/30/2008
Views: 442
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The back of the control board. Not the neatest job ever - but adequate for a prototype.
Date: 06/30/2008
Views: 346
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The control board temporarily mounted, checking for hole placement.
Date: 06/30/2008
Views: 442
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One view of the completed attenuator.
Date: 06/30/2008
Views: 415
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A second view of the completed prototype.
Date: 06/30/2008
Views: 372
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