K0CQ wrote:
>Steeper skirts and squarer passband corners mean more ringing, and so the
Inrad should ring morethan the TT.
Steeper and squarer than what? On May 11 I asked:
"Has anyone ever made actual 6/60 dB plots
of Ten Tec 217, 218 and 219 filters? Or does anyone
know if they can be found anywhere on a webpage?
I need the filter plots as standalone devices...
...not measured through the radio. Like these at
<http://www.qth.com/inrad/tentec_menu.htm>http://www.qth.com/inrad/tentec_menu.htm
if you
click "Performance Curve Online" (759, 760, 761)."
http://dayton.akorn.net/pipermail/tentec/2003-May/033935.html
Since I never received a single response I'm still
wondering what the Ten Tec filters look like? What is the
factual basis for the comments comparing Ten Tec and Inrad
filters? Certainly Inrad's #760 8-pole 250 Hz is sharper
than Ten Tec's 6-pole #219 250 Hz, but what about Ten Tec's
#217 8-pole 500Hz? Does anyone have a plot comparable to
Inrad's #759 here?
http://www.qth.com/inrad/graphs/759.gif
Just curious to know if anyone has found Ten Tec's
actual filter curve plots, especially for the #217?
73, Bill W4ZV
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