Re: [IRCA] Brian's array was Help with a couple UNIDs

[neilkaz <neilkaz@xxxxxxxxxxxxx>]

Brian, this sounds like it is working rather well. As for preselectors, I don't have experience with one to know how to easily spoil the high Q a bit. 73 and gl. KAZ

-----Original Message-----
>From: Brian Rachford <azswdxing@xxxxxxxxx>
>Sent: Dec 21, 2014 10:06 PM
>To: Mailing list for the International Radio Club of America <irca@xxxxxxxxxxxxxxxx>
>Subject: Re: [IRCA] Help with a couple UNIDs
>
>Neil,
>
>I seem to get a fairly stable rotatable cardioid pattern.  This is most
>obvious when I have two stations nearly opposite one another and can rotate
>the loop 180 degrees to go from a peak on one to a peak on the other, then
>can flip the "invert" switch on the phaser to go right back to the first
>station.
>
>I hadn't really tested the broadband aspect of the phaser null up until
>now, but I did this evening.  Indeed, the null holds up reasonably well
>between 680 KNBR and 810 KGO.  But, I have to say that I wasn't getting the
>greatest of nulls with either of these.  I'm not sure if that had to do
>with conditions or what else.  In any case, with a tuned loop and a tuned
>vertical, I have to twiddle knobs to go from one to another.  I need to
>test this some more.
>
>I have found that for strong signals, the Q is a bit too sharp on the
>pre-selector so I get some leakage through the null from several kHz on
>either side of the carrier, especially on lower frequencies.  The
>pre-selector is noticeably sharper than my loop.
>
>Brian
>
>On Sun, Dec 21, 2014 at 8:47 AM, neilkaz <neilkaz@xxxxxxxxxxxxx> wrote:
>
>> OK that setup should work well and be quite versatile. Are you getting a
>> true cardioid pattern or at least something close that can be adjusted and
>> aimed as you rotate the loop, perhaps required some retweaking?
>>
>> How broadbanded is the back null? ie lets say you null out KNBR to your
>> NW, is KCBS in a deep null with the same phaser setting? What about KGO? Is
>> a little phase and amplitude balance tweaking needed or a lot to switch
>> from best null of KNBR to a decent null of KGO?
>>
>> Glad to hear that you don't have a big noise issue on your recordings.  73
>> KAZ
>>
>> -----Original Message-----
>> >From: Brian Rachford <azswdxing@xxxxxxxxx>
>> >Sent: Dec 21, 2014 8:54 AM
>> >To: Mailing list for the International Radio Club of America <
>> irca@xxxxxxxxxxxxxxxx>
>> >Subject: Re: [IRCA] Help with a couple UNIDs
>> >
>> >Wow, that was really good!  With your tip, I was finally able to pick out
>> >"Escucha, eckes-eh-hay-elay" at the beginning and "Navajoa, Sonora,
>> Mexico"
>> >near the end of the clip.  That's certainly not what I heard at first, but
>> >I can agree with that now.  I hadn't thought too much about hearing
>> issues,
>> >but I know that I'm a little weak on voices and pretty good with music.
>> >
>> >Oh yeah, I'm using a Quantum Phaser with a 6-foot tuned loop and a 23-foot
>> >vertical.  The latter is run through an MFJ amplified pre-selector.  This
>> >is a new setup that is working well.
>> >
>> >Thanks,
>> >
>> >Brian
>> >
>> >
>> >On Sat, Dec 20, 2014 at 10:33 PM, neilkaz <neilkaz@xxxxxxxxxxxxx> wrote:
>> >
>> >> 1270 is 100% for sure XEGL Navajoa per call ID's and Navajoa and Navajoa
>> >> Sonora Mexico ments.
>> >>
>> >> My ears while very good with spoken word (especially male) are very bad
>> >> with singing (almost hopeless if female) (was certified 2/3 tone deaf
>> when
>> >> 5 years old) and I copy nothing on 1450 that is calls.
>> >>
>> >> What are you phasing that loop against? What loop? What phaser?
>> >>
>> >> 73 KAZ
>> >>
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