[MAMS] White box 10GHZ question

[Rich Griffiths]

While looking at recent list postings, I noticed this item from back in 
April.

Since then, I've had the opportunity to test my own white-box 
coax-to-waveguide transition with the attenuator backed all the way out 
(thanks to Stan, W1LE, who has some impressive instrumentation).

We compared it to a very simple coax-to-waveguide transition and found 
that it had a tad more than 1 dB of loss by comparison.  So it's now in 
the junk box, and the little transition is on my dish.

... Rich   W2RG


On 04/10/2012 11:05 AM, MARK K8MD wrote:
> I gutted my Whitebox dish an used only the power supply for operating Transverter and amplifiers. Worked pretty good but took it down with plans this summer to place on higher tower that is only half up.
>
>   I needed Surgery on left hand to do more work. I will be ready in 6 to 8 weeks to get things up after healing. What I'm curious about and looking at the wave guide  with splash for feed I notice on 3 different units a spring loaded device, a screw kinda device and third one similar to the screw type. Asking a person I know who worked for a company installed the white boxes for communication full-duplex. He says that it was to attenuate signal enough so transmit and received would not interfer with each other (like for desense).
>
> I am wondering if I remove the piece (attenuator) and cover the hole with brass will I gain anything by removing it from Waveguide. It seems to me that I might be losing signal. It may be small but I want to get the most out of the system. I have someone who has taken that piece is going optimize it as he did with his home brew 10ghz. He has a complete lab at home good to 40ghz and his portable 10ghz, using small dish hears real well.
>
> Set-up in DIsh is Kuhne XVTR, cascaded DEM amps 8 watts  and Kuhne pre-amp.
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