[ICOM] Re: ICOM IC-775 Roofing Filter
Hans Remeeus
hans at remeeus.nl
Mon Jun 11 16:21:32 EDT 2007
Hello Skip,
You can read some of my suggestions on:
http://www.remeeus.eu/english/hamradio/ic775filtering.htm
Later on I replaced the FL-44A with the Inrad #314 with 2.1 kHz bandwidth.
http://www.remeeus.eu/english/hamradio/ic775roofingfilter.htm
73,
Hans Remeeus (PA1HR)
http://www.remeeus.eu
Communication is about people, the rest is technology.
>> ----- Original Message -----
>> From: "Skip Cameron" <scameron at austin.rr.com>
>> To: <icom at mailman.qth.net>
>> Sent: Monday, June 11, 2007 6:12 PM
>> Subject: [ICOM] Roofing Filters Question
>>
>>
>>> I have an IC775DSP with 455khz and 9mhz IF's.
>>> I have the stock IF filters, which are 500hz for CW and 2400hz for SSB.
>>> On CW I can select wither the 2.4 or the 500, and I can also engage DSP
>>> which really narrows the CW,
>>> down to about 50hz.
>>> For contests and split Dxing, the DSP 50 hz is too narrow on CW, 500 hz
>>> works pretty good, and the
>>> 2.4 is too wide on SSB, with lots of other strong signals interfering.
>>> I have been considering INRAD roofing filters, 400cw and 2100SSB.
>>> Would I need them in both 455 and 9 IF's?
>>> If I just wanted one, not both, which would be best?
>>> Skip W5GAI
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