[50mhz] Ohmite RF Chokes

Alan L. Waller [email protected]
Tue, 27 Aug 2002 19:51:12 -0400


Barry,

I found the chokes and my 6M amp is all better now. I am QRV tonight from 
FM28 Delaware if there is any propagation. I will return to Andros Island 
FL-14 as C6ALW on 9/14 for 4 weeks. I worked 310 QSO's and 9 countries from 
there 8/14 to 8/24.

73 and thanks for the chart I printed it for future reference.

Al



>Ohmite  Frequency   Inductance   Core Dimensions     Color
>Number  Range, MHz  Microhenries    inches
>
>Z-400    320 - 520    0.20       1/8 long, 5/32 dia  Blue
>Z-235    160 - 350    0.84       3/4 long, 3/16 dia  Yellow
>Z-144     80 - 200    1.8        3/4 long, 5/16 dia  Green
>Z-50      35 - 110    7.0         1 long, 9/32 dia   Red
>Z-28      20 - 60     21.0      1-3/4 long, 5/16 dia Yellow
>Z-14       7 - 35     44.0        2 long, 7/16 dia
>Z-7        3 - 20     84.0        6 long, 9/16 dia
>
>All are single layer coils.  The three lowest frequency units are
>wound on ceramic tubes, while the others are wound on phenolic rods.
>Without a readily available form,
>a one half to two watt high value resistor may be used.