Preston,
I made a HB attenuator about 20yrs ago from the details given in
an old handbook. I used minature toggle switches, 1/4W resistors,
and carefully cut pieces of PCB for the box and dividers between
the sections. Also used good quality BNC connectors as junk ones
will wear out in a hurry if you use the attenuatior much. It seems
farily accurate as measured on commercial specturm analyzers. I
have yet to _really_ calibrate it though.
My question to add to this discussion is why do so many folks
advise to use slide switches instead of toggle switches? I've
yet had no trouble. Am I lucky?
Roger Traylor
WB4TPW
-------------
> Hi Gang,
>
> I have discovered that the more test equipment one has, the more one needs.
> Now that I have a good scope and a working spectrum analyzer adapter, I
> really need a workable step attenuator. I notice that there is a relatively
> easy one described in the ARRL Handbook, and a somewhat more fiddly (?) one
> in a '94 QST. Has anyone tried making these? Has anyone used the Far
> Circuits boards for the QST one? Or does someone have a suggestion for a low
> cost one from the surplus market (does one exist?) I recognize that the
> problem with surplus ones can be that they are designed for impedances other
> than 50 ohms. So, gang, can we talk about this?
>
> I recognize this isn't pure QRP, but it is related in the sense that this
> stuff is intended to be used to build QRP stuff with!
>
> Thanks,
>
> Preston WJ2V
>
>
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