Except...
You could just leave the DSP at a wider bandwidth, 2.5, 3, 4, then
switch the roofing filter from the filters menu. Hassle-ish, and perhaps
of little outright utility, but might allow you to compare the two
filters without varying the DSP BW.
Martin, HS0ZED
On 25/08/2016 05:52, denton sprague wrote:
ok…looks like I misread what TT has installed….I will pull the 2.4 TT filter
and try the inrad filter in its stead and see what, if any difference, it makes.
On Aug 24, 2016, at 7:05 PM, Gary J FollettDukes HiFi <dukeshifi@comcast.net>
wrote:
I sure agree with you 100% on this Barry!
The 1.8 KHz only kicks in when you narrow the passband bandwidth of the DSP to
less than 1.8 KHz anyway so the bandwidth of the Inrad will not even be noticed.
Also correct on the lack of cascading. On the Omni 5 and 6 there was cascading
on the 9 MHz board so there was benefit in putting a 2.4 KHz filter into the N1
position of the 9 MHz hard as this produced 16 pole effective filtering. I did
this several times using a standard Ten Tec 2.4 KHz filter in the N-1 slot and
notices some improvement in adjacent signal rejection without the awful audio
offered when using the 1.8 KHz filter.Not so in the Orion.
The only possible gain one might realize from the Inroad filter is to put it
where it belongs, in the 2.4 KHz slot in place of the 4 pole factory filter as
I believe the Inroad is an 8 pole filter. This would sharpen the skirts of the
roofing filter, offering somewhat better selectivity while still offering
reasonable SSB bandwidth.The roofing filter is not even used in transmit so
that change would not affect transmitter radio one iota.
73
Gary
W0DVN
On Aug 24, 2016, at 8:13 PM, Barry N1EU <barry.n1eu@gmail.com> wrote:
Makes no sense to me. What was your thinking behind that plan? Maybe I'm
missing something, but the radio will work exactly the same with or without
a 2400hz filter in the 1800hz slot. There's no cascading in the Orion2 if
that was the thinking behind it.
73, Barry N1EU
On Thu, Aug 25, 2016 at 12:39 AM, denton sprague <denton@oregontrail.net>
wrote:
I finally ordered an Inrad 2400 ssb filter for my Orion 2….will use it in
the vacant 1800 hrz slot. Will be interesting to hear the difference in
performance.
Any comments?
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