I have the ICE filter because I was too cheap to buy the better one from
W3NQN. He had two articles in QST in May and June 1998 if you want to roll
your own. If you want to buy a ready-made one, Array Solutions sells them
on its web site, http://www.arraysolutions.com/.
The W3NQN filters have more attenuation, especially at the high end of the
BCB, than the ICE ones. His best one is a receive-only filter, but
unfortunately Ten-Tecs that I own (Orion) or have owned (OMNI-VI and Scout),
don't have the RX antenna in-and-out loop that an FT-1000MP does, so that's
a project. (My PROII doesn't have one either.)
Array Solutions sells the ICE ones too, and Jay, WX0B, has attenuation
curves of both on his web site.
Jim N7US
----- Original Message -----
From: "Robert & Linda McGraw K4TAX" <RMcGraw@Blomand.Net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Wednesday, May 25, 2005 3:24 PM
Subject: Re: [TenTec] Eliminating BCI Overload
A high pass filter with a cut-off at 1.5 MHz should do equally well. A
constant K, T section, consisting of 2 series capacitors with an inductor to
ground designed for 50 ohms should work. Design it, build it, insert it in
line and forget it.
73
Bob, K4TAX
----- Original Message -----
From: "Stuart Rohre" <rohre@arlut.utexas.edu>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Wednesday, May 25, 2005 4:37 PM
Subject: Re: [TenTec] Eliminating BCI Overload
>A series tuned trap for each AM frequency can be placed antenna lead to
> ground.
>
> With a large paint can, you could install a Helical Coil Resonator notch
> filter to ground for each. The notch of the HCR can be 45 dB or more,
> depending on Q of the coil inside the shielding can.
>
> Stuart
> K5KVH
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|