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Re: Freq Chart for AO-40??
- Subject: Re: [amsat-bb] Freq Chart for AO-40??
- From: David Rush <ky0dr@xxxxxxxxxxxxx>
- Date: Thu, 19 Jul 2001 08:50:47 -0500
Bruce:
It's easy - I ignore doppler!
True, it's not perfect, but it gets you in the ballpark, and should be pretty darn close when the bird "hangs" out at apogee for long-ish
periods of time. I used such a chart for tagging FO20/29 contacts on Field Day, with mucho doppler - it gives you a starting place to
start hunting for yourself.
Obviously computer control (or the computer responding to where you spin the dial) with automagic doppler correction is best, but a
static chart is the next best thing.
David, ky0dr
7/19/01 8:34:34 AM, "Bruce Paige" <kk5do@arrl.net> wrote:
>how do you create a chart like this when you don't know what doppler is? i
>thought the offset from 2401.??? to the 145 mhz band is dependent on what
>doppler is and on what the crystal you used converts to. my crystal is 200khz
>lower than most so it would be completely different.
>73...bruce
>
>Date sent: Thu, 19 Jul 2001 08:00:11 -0500
>To: amsat-bb@AMSAT.Org
>From: David Rush <ky0dr@earthlink.net>
>Subject: Re: [amsat-bb] Freq Chart for AO-40??
>Send reply to: ky0dr@arrl.net
>Organization: Dragon Ranch
>
>>
>> >Has anyone made up a frequency chart for AO-40 in respect to the 70cm
>> >uplink and 2400 mhz downlink? I'm going to try and work on one this
>> >weekend with the conversion to 144mhz.
>>
>> Here's a cut-n-paste from my Excel spreadsheet
>>
>> S2 Downlink Converted Uplink
>> 2,401.173 145.173 435.852 S2 passband lower limit
>> 2,401.225 145.225 435.800
>> 2,401.230 145.230 435.795
>> 2,401.235 145.235 435.790
>> 2,401.240 145.240 435.785
>> 2,401.245 145.245 435.780
>> 2,401.250 145.250 435.775
>> 2,401.255 145.255 435.770
>> 2,401.260 145.260 435.765
>> 2,401.265 145.265 435.760
>> 2,401.270 145.270 435.755
>> 2,401.275 145.275 435.750
>> 2,401.280 145.280 435.745
>> 2,401.285 145.285 435.740
>> 2,401.290 145.290 435.735
>> 2,401.295 145.295 435.730
>> 2,401.300 145.300 435.725
>> 2,401.305 145.305 435.720
>> 2,401.310 145.310 435.715
>> 2,401.315 145.315 435.710
>> 2,401.320 145.320 435.705
>> 2,401.323 145.323 435.702 Middle beacon, stay away
>> 2,401.325 145.325 435.700
>> 2,401.330 145.330 435.695
>> 2,401.335 145.335 435.690
>> 2,401.340 145.340 435.685
>> 2,401.345 145.345 435.680
>> 2,401.350 145.350 435.675
>> 2,401.355 145.355 435.670
>> 2,401.360 145.360 435.665
>> 2,401.365 145.365 435.660
>> 2,401.370 145.370 435.655
>> 2,401.375 145.375 435.650
>> 2,401.380 145.380 435.645
>> 2,401.385 145.385 435.640
>> 2,401.390 145.390 435.635
>> 2,401.395 145.395 435.630
>> 2,401.400 145.400 435.625
>> 2,401.405 145.405 435.620
>> 2,401.410 145.410 435.615
>> 2,401.415 145.415 435.610
>> 2,401.420 145.420 435.605
>> 2,401.425 145.425 435.600
>> 2,401.430 145.430 435.595
>> 2,401.435 145.435 435.590
>> 2,401.440 145.440 435.585
>> 2,401.445 145.445 435.580
>> 2,401.450 145.450 435.575
>> 2,401.455 145.455 435.570
>> 2,401.460 145.460 435.565
>> 2,401.465 145.465 435.560
>> 2,401.470 145.470 435.555
>> 2,401.475 145.475 435.550 S2 passband upper limit
>> 2,401.573 145.573 S2 engineering beacon
>> 2,401.720 145.720 RUDAK downlink
>>
>> Please let me know if I have mistakes in the above.
>>
>> David, ky0dr
>>
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>
>
>
>
>============================================================================
>Bruce Paige, KK5DO Internet: kk5do@arrl.net
>Houston, Texas kk5do@amsat.org
>AMSAT Awards Manager kk5do@amsatnet.com
>ARRL Awards Manager (WAS, 5BWAS, VUCC), VE
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