How cool! That's where I'd like to get for sure, but I'd try things
out with the 2.4khz roofing filter first (since that's what I have). I
was remarking to a friend of mine the other day how bothersome it is
to have empty filter slots in the rig ... he agreed. Don't know that I'd
lose sleep over it, but it is annoying.
On Mon, 24 Jan 2011 21:27:56 -0500
John Oglesby <email@example.com> wrote:
>Neal - That is the set-up I am running, three INRAD filters in a row.
>An INRAD CW roofing filter and INRAD 250Hz filters in both IFs. It
>works really well in contesting. For casual operating I run the INRAD
>roofing filter with 500Hz TT filters in both IFs. So, obviously I
>have the roofing filter set to turn on on both N-1 and N-2. If I need
>to use the noise blanker (like on 160) I can't run the roofing filter
>as the narrow bandwidth screws up the blanking operation. So then I
>just run the primary 500 or 250 filters. This set-up works great for
>The gain balance is good with the roofing filter and cascaded INRAD
>250Hz filters. Before this set-up I had some issues with the TT 250Hz
>filters installed. The passbands didn't work well together and I had
>to add some additional gain.
>On 1/24/2011 11:17 AM, NL7VL wrote:
>> Do you have the instruction sheet? It can be wired to work off of
>> either N1, N2, or full-time. If it was not using one of the narrow
>> switches you would certainly notice it on SSB. I'm still trying to
>> figure out if installing the 9MHz CW filter into the N1 position
>> would cause the roofing filter to drop out, but I would doubt it.
>> That would be quite the CW setup to have the CW roofing filter, and
>> INRAD CW filters both IFs! I believe you can install the CW filter in
>> either position, so if the roofing filter is controlled by N1, N2
>> would bring the 9MHz CW filter into the circuit, too. I don't think
>> you can easily use N1 to control both. I'm sure it *could* be done,
>> but getting things working normally would be the first task.
>> I'm not sure about the gain setting but you probably would want the
>> high gain with 20 poles of filtering :)
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