My results below. I left the main ant connectec, but switched to Aux
Antenna and scouted out birdies. None are loud, some are more
noticeable... (+ indicates the loudest level, can be heard with antenna
connected and low band noise. Remember most of these birdies are
extremely narrow - no more than 80 Hz wide.) Rig is Omni VI+ Serial
Number 10A10157, received today, 11.24.97.
Hope this is useful. The "-" and "--" notations are strength. -- is
barely readable above the noise, and - is slightly more so. Connecting
the antenna causes these to disappear (either noise or load, not sure
which). I only did the first hundred or so KHz of each band because I'd
rather be chasing DX with the new Omni than checking this out. It would
seem to me that your rig, Karl, has a bug in it causing the birdies to be
at an objectionable level.
73, Duane
Duane A. Calvin, AC5AA
ac5aa@Juno.com -or- duanec@prodigy.net
Day: dcalvin@austin.ibm.com
On Sun, 23 Nov 1997 11:21:40 -0600 Karl Heimbach
<heimbach@concentric.net> writes:
>Hello gang,
>
>Thanks again for all the responses concerning Omni V and VI birdies.
>Some of you asked for an expanded list of birdies that I could hear
>and
>the conditions I was hearing them under.
>
>So here goes:
>
>Omni VI Plus, serial number 10A10097
>Purchased 11/11/97
>
>Installed filters - 217 and 285
>
>Test conditions as follows:
>
>1) Omni VI antenna jack connected alternately to a 50 ohm dummy load,
>Cushcraft A-3, or 160 meter dipole via external B&W antenna switch.
>
>2) DSP and notch filters off, no auxilliary filters engaged, in CW
>mode.
>
>3) AGC on and in fast position.
>
>Birdies heard at:
>
>160 Meters: 1.8001, 1.8385, 1.8777, 1.8816, 1.8878, 1.9010, 1.9348,
>1.9521, 1.9796, 1.9878, 1.9989
AC5AA -> 1840.5, (+) 1851 (--), 1865.9 (--), 1899.4 (--), 1900.5 (-),
1904.1 (--) (etc) First one was loudest, and it is barely above the
noise with antenna connected.
>
>80 Meters: 3.5547, 3.5588, 3.5665, 3.5908, 3.5995, 3.6260, 3.6289,
>3.6514, 3.6648, 3.6780, 3.7137, 3.7387, 3.7502, 3.8330, 3.8495,
>3.8630,
>3.8720, 3.8762, 3.8870, 3.8891, 3.9000, 3.9252, 3.9534, 3.9996,
>4.0000
AC5AA -> 3599.4 (-), 3651.4 (--), 3713.7 (--), 3723.5 (-),
>
>40 Meters: 7.0108, 7.0168, 7.0358, 7.0449, 7.0786, 7.1396, 7.1662,
>7.1922, 7.2225, 7.2600
AC5AA -> 7010.8 (---), 7016.8 (-), 7023.1 (--), 7042.8 (--), 7047.0 (-),
etc.
>
>30 Meters: 10.1098, 10.1329
AC5AA -> 10132.8 (+)
>
>20 Meters: 14.0000, 14.0232, 14.0619, 14.0968, 14.1309, 14.1357,
>14.1456, 14.1530, 14.2208, 14.2590, 14.2660, 14.2684, 14.2705, 14.3562
AC5AA -> 14000.0 (--), 14023.2 (-), 14043.8 (--), 14099.3 (---), etc.
>
>17 Meters: 18.0708, 18.0969, 18.1020, 18.1220, 18.1382, 18.1657,
>18.1724
AC5AA -> 18070.7 (--), 18099.2 (--), 18101.9 (-), etc.
>
>15 Meters: 21.0901, 21.1606, 21.1938, 21.1965, 21.2115, 21.2335,
>21.2911, 21.3324, 21.3630, 21.3931, 21.4326, 21.4387
AC5AA 21009.7 (---), 21042.7, 21099.2 (---),
>
>12 Meters: 24.8950, 24.8995, 24.9000, 24.9585, 24.9624, 24.9831,
>25.0000
AC5AA -> 24897.2 (-), 24930.5 (+), etc.
>
>10 Meters: 28.0000, 28.0355, 28.062, 28.1106, 28.1216, 28.1240,
>28.1474,
AC5AA -> 28099.2 (--), etc.
>28.1656, 28.1812, 28.1993, 28.2849, 28.2960, 28.3318, 28.4059,
>28.4439,
>28.5178, 28.5325, 28.5500, 28.5561, 28.6242, 28.6653, 28.7137,
>28.7780,
>28.7994, 28.8330, 28.8871, 28.9518, 29.0364, 29.1102, 29.1729,
>29.2585, 29.3906, 29.4068, 29.4280, 29.4576, 29.5552, 29.6244,
>29.6404
>
>Some are weak are are masked by atmospheric noise when an antenna is
>connected, but the moderate to strong ones are not. With a resonant
>antenna connected, I can hear a tones ranging from S1 to S5+ at about
>50% of the frequencies listed above.
>
>Hope this is of some use.
>
>Regards,
>
>Karl - W5QJ
>
>--
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>
--
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