[MAMS] White box 10GHZ question

[aa9il at sbcglobal.net]

Hi all
I had a white box assembly and also the 2 ft dish.
It sounds like the assembly is a plunger attenuator.
If you looked in the wavegude, there will be a strip
of attenuator material parallel to the narrow wall
of the waveguide (some vane attenuators will pass
a strip of attenuation material through the wide
wall of the wave guide).

for my transverter, I pass the coax from the sma
relay to a WR90 to sma transition bolted on at
the dish.

Its been along time since I saw the white box
'guts' but I think the whitebox RF assembly
had a transtion to waveguide that had the
attenuator built in to it (?) - the conversion
had that removed and the RF assembly had an
SMA connector added to it.

Hope this helps but yes you would want to 
have a regular sma to WG adapter bolt to
the dish and feed the transverter with
a short run of sma to sma coax.

73 de Mike


--- On Tue, 4/10/12, Zack Widup <w9sz.zack at gmail.com> wrote:

> From: Zack Widup <w9sz.zack at gmail.com>
> Subject: Re: [MAMS] White box 10GHZ question
> To: "Mid-America Microwave Society" <mams at mailman.qth.net>
> Date: Tuesday, April 10, 2012, 10:11 AM
> Hi Mark,
> 
> Do you have any photos? I would guess that your described
> mod will work. It
> would help to see what you're working with, though.
> 
> 73, zack W9SZ
> 
> On Tue, Apr 10, 2012 at 10:05 AM, MARK K8MD <k8md at sbcglobal.net>
> 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.
> >
> ______________________________________________________________
> > MAMS mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/mams
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:MAMS at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> >
> ______________________________________________________________
> MAMS mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mams
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MAMS at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>