Topband: roofing filter FT1000 (D)
Larry Molitor
w7iuv at yahoo.com
Tue Nov 22 14:38:16 EST 2005
Bert Hollander <pa7mm at wxs.nl> wrote: Hello, i am curious anyone has experience on topband with the new roofing filter from Inrad for the FT1000(D) series.
I decided to upgrade my old FT1000 (see also the w8ji site) and keep it for more years. Also i am not using the Ft1000 250 hz
filters because of to much signal loss.. Change into 400hz filters worthwhile ?Bet,
i recently installed the Inrad roofing filter in my FT1000D. If you are looking for a magic bullet, this is not it. However, it does what is is supposed to do. It provides a noticeable improvement in topband CW operation by virtue of helping to minimize the effect nearby strong signals. This is most noticeable in the operation of the noise blanker. Casual operators might not notice the difference, but it is there and if you are after the last possible bit of improvement, it's worth the money.
The kit is well done with good instructions and an easy installation.
BTW, if I didn't have my 250 Hz filter, I'd have to give up low band CW. If yours causes "too much signal loss" I'd say the filter has gone bad and should be replaced. No signal loss in mine.
73,
Larry - W7IUV
DN07dg - central WA
http://w7iuv.com
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