On Tue, 9 Oct 2001 11:53:53 +1300 "Barry Kirkwood" <bjk@ihug.co.nz>
writes:
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>I seem to remember the famous Ulrich Rohde publishing a small note in
>?Ham Radio using pad and compensating reactances to tame gg input with
>=
>no switching bands.
>Anybody got a lead on this?
>73
>end
>Barry Kirkwood PhD ZL1DD
>Signal Hill Homestay
>66 Cory Road
>Palm Beach
>Waiheke Island 1240
>NEW ZEALAND
Hi Barry,
March ''79 Ham Radio, page 48. Note that there are a couple of
printing goofs in the schematic -- the two caps in the top row with
values past the decimal point should be marked nF (nanofarads).
An interesting idea... considered using it myself once upon a time
but... it has some drawbacks.
It uses just about as many coils as a classic switched network and they
are somewhat larger in value.
There is no harmonic suppression.
There is no easy way to adjust it in case your math comes out wrong and
you need to change the impedance match.
73 & Good evening,
Marv WC6W
*
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