| |
CX2SA > SATDIG 07.08.11 00:12l 940 Lines 30439 Bytes #999 (0) @ WW
BID : AMSATBB6439
Read: GUEST
Subj: AMSAT-BB-digest V6 439
Path: IZ3LSV<IV3YXW<HB9TVW<DB0ANF<CX2SA
Sent: 110806/2207Z @:CX2SA.LAV.URY.SA #:20453 [Minas] FBB7.00e $:AMSATBB6439
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: ARISSatTLM (Phil Karn)
2. Re: New Keps (Phil Karn)
3. Re: Transponder (Phil Karn)
4. Re: ARISSatTLM (N0JY)
5. Re: Anyone using an FT-847 and SignaLink USB to copy
ARISSat-1 BPSK telemetry? (Phil Karn)
6. ARR Preamp Help (Zachary Beougher)
7. Re: ARR Preamp Help (Zachary Beougher)
8. Re: ARR Preamp Help (Dee)
9. Re: New Keps (Nigel A. Gunn, W8IFF/G8IFF)
10. Re: AMSAT-BB Digest, Vol 6, Issue 438 (Louis McFadin)
11. SatPC32 (Bato, Andras)
12. ARISSat-1 Transponder Active. (Nader Omer)
13. Re: ARR Preamp Help (Zachary Beougher)
14. Re: SatPC32 (Dave Webb KB1PVH)
15. Re: SatPC32 (Dave Webb KB1PVH)
16. 5 in em55 (wa4hfn@xxxxxxx.xxxx
17. Re: ARR Preamp Help (Edward R. Cole)
----------------------------------------------------------------------
Message: 1
Date: Sat, 06 Aug 2011 12:17:54 -0700
From: Phil Karn <karn@xxxx.xxx>
Subject: [amsat-bb] Re: ARISSatTLM
To: n0jy@xxxx.xxx
Cc: AMSAT-BB@xxxxx.xxxx N0JY <n0jy@xxxxxxx.xxx>
Message-ID: <4E3D9362.4050805@xxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/6/11 9:31 AM, N0JY wrote:
> I'm having trouble getting telemetry.
Jerry, is this a night-side pass with the satellite in low power mode?
The coding is not optimal for a signal that's present only a small
fraction of the time, as it takes 16.384 sec at AOS to "fill the pipe"
in the de-interleaver used to combat fading. It's barely done that when
the transmitter turns off again at 40 sec.
It works much better on the day-side passes with a continuous signal,
even if it's fading deeply.
The CW beacon is 1 kHz below the (suppressed) carrier of the BPSK-1000
beacon. Make sure your radio is in USB mode and accurately tune the CW
beacon so that it comes out at 500 Hz. This will center the BPSK at 1500
Hz. It extends from 500 to 2500 Hz (2 kHz total bandwidth) between
spectral nulls. That's not much narrower than a regular SSB filter, so
make sure your passband shift filter, if any, is set to pass it.
73, Phil
------------------------------
Message: 2
Date: Sat, 06 Aug 2011 12:20:30 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: New Keps
To: "Nigel A. Gunn, W8IFF/G8IFF" <nigel@xxxxx.xxx>
Cc: "<amsat-bb@xxxxx.xxx>" <amsat-bb@xxxxx.xxx>
Message-ID: <4E3D93FE.4010209@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/6/11 9:54 AM, Nigel A. Gunn, W8IFF/G8IFF wrote:
> JUNO
> 1 37773U 11040A 11217.69136966 +.00002254 -71274-5 +00000-0 0 00015
> 2 37773 028.7890 020.5966 0025801 264.4436 221.8704 16.26214442000002
These elements don't make sense. This object is in a low circular orbit,
while Juno is on an earth escape trajectory. The eccentricity shown in
the real-time telemetry screen at Centaur shutdown was about 1.5.
What happened to the Atlas first stage? Did it go into orbit?
------------------------------
Message: 3
Date: Sat, 06 Aug 2011 12:29:09 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: Transponder
To: George Henry <ka3hsw@xxx.xxx>
Cc: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID: <4E3D9605.5040708@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/6/11 8:23 AM, George Henry wrote:
> It doesn't appear that the satellite has any active or passive attitude
control
> system.
Correct.
> I have heard that the spin should eventually settle around the same
> axis as the antenna, but is there any reasonable hope that that would happen
> during the satellite's operational lifetime?
Good question. Theory says it will *eventually* happen, but how fast
depends on the mechanisms to dissipate mechanical energy in the
spacecraft. Because the frame and the modules inside are so rigid, I
think the flexible 2m antenna will probably do most of the work.
One way to follow this is to measure the satellite's spin period very
accurately over time. Assuming no external torque (e.g., atmospheric
drag, which will eventually become significant) then the spacecraft must
conserve its original angular momentum. But as it dissipates excess
energy and converts to a spin around the preferred axis (i.e., shifts
its angular momentum to the body axis with the greatest moment of
inertia), the spin rate will decrease.
E.g., if the moment of inertia around the axis of initial spin is, say,
1, and the moment of inertia around the preferred (antenna) axis is 3,
then after it settles down the spin rate will be 1/3 of its original value.
So if we can follow the spin rate over time we can predict how long
it'll take to reach a stable spin around the antenna axis. That does
require knowledge of the moments and products of inertia, which I assume
were measured before launch.
73, Phil
------------------------------
Message: 4
Date: Sat, 06 Aug 2011 14:34:18 -0500
From: N0JY <n0jy@xxxxxxx.xxx>
Subject: [amsat-bb] Re: ARISSatTLM
To: Phil Karn <karn@xxxx.xxx>
Cc: AMSAT-BB@xxxxx.xxx
Message-ID: <4E3D973A.6000300@xxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hi Phil,
Yes, it was last night around midnight-thirty Central Time.
I had done some earlier tries during the "warm up" testing last weekend
in the daylight with no good result, though.
I have switched the input to my Windows 7 PC and I will let it capture
what it does tomorrow morning, to compare. Since the daylight passes
will all be while I'm at work, perhaps I'll alternate between the Vista
and the Windows 7 PCs during the week to see what I come up with.
Thanks and 73,
Jerry
N0JY
On 8/6/2011 2:17 PM, Phil Karn wrote:
> On 8/6/11 9:31 AM, N0JY wrote:
>> I'm having trouble getting telemetry.
> Jerry, is this a night-side pass with the satellite in low power mode?
> The coding is not optimal for a signal that's present only a small
> fraction of the time, as it takes 16.384 sec at AOS to "fill the pipe"
> in the de-interleaver used to combat fading. It's barely done that when
> the transmitter turns off again at 40 sec.
>
> It works much better on the day-side passes with a continuous signal,
> even if it's fading deeply.
>
> The CW beacon is 1 kHz below the (suppressed) carrier of the BPSK-1000
> beacon. Make sure your radio is in USB mode and accurately tune the CW
> beacon so that it comes out at 500 Hz. This will center the BPSK at 1500
> Hz. It extends from 500 to 2500 Hz (2 kHz total bandwidth) between
> spectral nulls. That's not much narrower than a regular SSB filter, so
> make sure your passband shift filter, if any, is set to pass it.
>
> 73, Phil
>
>
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 6356 (20110806) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
------------------------------
Message: 5
Date: Sat, 06 Aug 2011 12:39:25 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: Anyone using an FT-847 and SignaLink USB to
copy ARISSat-1 BPSK telemetry?
To: APBIDDLE@xxxxxxx.xxx
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>, SAREX-BB <SAREX@xxxxx.xxx>, "Alan
P. Biddle" <APBIDDLE@xxxxxx.xxx>
Message-ID: <4E3D986D.1030306@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/6/11 6:09 AM, Alan P. Biddle wrote:
> Hi,
>
>
> made/purchased, due to the numerous running production mods. There have been
> a few reports of people being unable to "print" the BPSK telemetry, even
> though the signal is good, and the CW decodes well.
>
I just thought of another possibility. I wrote my demodulator to work
with a sample rate of exactly 48 kHz. Check to make sure your A/D
converter supports that rate and it's actually set to it. Most computer
A/Ds do, but because 44.1 kHz is so common as the sample rate of the CD
while 48 kHz is the professional audio standard, it's possible that some
don't support 48 kHz.
In theory I could modify my code to work with any sample rate that is an
exact integer multiple of the symbol rate (1 kHz) but it's not trivial.
But there are programs that will perform arbitrary sample rate
conversion for you (e.g., the open source program 'sox').
My demodulator is rather sensitive to errors in that A/D sample rate. It
processes audio in 'chunks' of about 1/2 second, and it can easily
handle a slip of up to 1 sample per 'chunk'. That corresponds to a
sampling frequency error of 2 Hz. More than that gets dicey, and it's
possible that some sound cards have bigger errors than this.
Do you have any way to check the accuracy of your A/D clock? One way
would be to digitize WWV, run a FFT on the recording, and look at the
audio tones that should be exactly 440, 500 and 600 Hz.
73 Phil, KA9Q
------------------------------
Message: 6
Date: Sat, 6 Aug 2011 15:40:27 -0400
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] ARR Preamp Help
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS17139F050CE998AD6870B6B33F0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi All,
I was monitoring some passes while mobile today, and amidst all of the
confusion of messing with coax and frequencies, I accidently transmitted on
440, through the preamp, with 35w (the relay is rated at 25w). I thought I
had switched the VFO back to 2m, but I guess not. It was only for a split
second, but since that every time I turn the preamp on it automatically
knocks out all received signal. Does anyone have any idea on what I need to
do/check to see what I did to it? I have heard of this happening, I just
need to know what path to take now to get it fixed.
It is worth mentioning that I can receive fine with the preamp in-line, but
the minute I throw the power switch it knocks out all receive (just static,
no received audio). I have not changed any of the connections, so having a
coax hooked up backwards is not the issue.
Thanks,
Zack
KD8KSN
------------------------------
Message: 7
Date: Sat, 6 Aug 2011 15:41:12 -0400
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: ARR Preamp Help
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS202CECDDBD75FA43C642F8B33F0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
I forgot to mention that it is the ARR SP432VDG model.
From: Zachary Beougher
Sent: Saturday, August 06, 2011 3:40 PM
To: amsat-bb@xxxxx.xxx
Subject: ARR Preamp Help
Hi All,
I was monitoring some passes while mobile today, and amidst all of the
confusion of messing with coax and frequencies, I accidently transmitted on
440, through the preamp, with 35w (the relay is rated at 25w). I thought I
had switched the VFO back to 2m, but I guess not. It was only for a split
second, but since that every time I turn the preamp on it automatically
knocks out all received signal. Does anyone have any idea on what I need to
do/check to see what I did to it? I have heard of this happening, I just
need to know what path to take now to get it fixed.
It is worth mentioning that I can receive fine with the preamp in-line, but
the minute I throw the power switch it knocks out all receive (just static,
no received audio). I have not changed any of the connections, so having a
coax hooked up backwards is not the issue.
Thanks,
Zack
KD8KSN
------------------------------
Message: 8
Date: Sat, 06 Aug 2011 15:51:29 -0400
From: Dee <morsesat@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: ARR Preamp Help
To: "'Zachary Beougher'" <zack.kd8ksn@xxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <000001cc5472$3c27ada0$b47708e0$@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
You have blown it--If you are not a handy tech. - Send it back to ARR
and they have a flat fee for repairs. Check with them on the
internet.
73,
Dee, NB2F
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx
On Behalf Of Zachary Beougher
Sent: Saturday, August 06, 2011 3:40 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ARR Preamp Help
Hi All,
I was monitoring some passes while mobile today, and amidst all of the
confusion of messing with coax and frequencies, I accidently
transmitted on 440, through the preamp, with 35w (the relay is rated
at 25w). I thought I had switched the VFO back to 2m, but I guess
not. It was only for a split second, but since that every time I turn
the preamp on it automatically knocks out all received signal. Does
anyone have any idea on what I need to do/check to see what I did to
it? I have heard of this happening, I just need to know what path to
take now to get it fixed.
It is worth mentioning that I can receive fine with the preamp
in-line, but the minute I throw the power switch it knocks out all
receive (just static, no received audio). I have not changed any of
the connections, so having a coax hooked up backwards is not the
issue.
Thanks,
Zack
KD8KSN
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
author.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Sat, 06 Aug 2011 19:56:01 +0000
From: "Nigel A. Gunn, W8IFF/G8IFF" <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: New Keps
To: Phil Karn <karn@xxxxxxxx.xxx>
Cc: "<amsat-bb@xxxxx.xxx>" <amsat-bb@xxxxx.xxx>
Message-ID: <4E3D9C51.1040406@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Perhaps it's in a parking orbit waiting for another burn.
On 08/06/2011 07:20 PM, Phil Karn wrote:
> On 8/6/11 9:54 AM, Nigel A. Gunn, W8IFF/G8IFF wrote:
>
>> JUNO
>> 1 37773U 11040A 11217.69136966 +.00002254 -71274-5 +00000-0 0 00015
>> 2 37773 028.7890 020.5966 0025801 264.4436 221.8704 16.26214442000002
> These elements don't make sense. This object is in a low circular orbit,
> while Juno is on an earth escape trajectory. The eccentricity shown in
> the real-time telemetry screen at Centaur shutdown was about 1.5.
>
> What happened to the Atlas first stage? Did it go into orbit?
>
>
>
>
------------------------------
Message: 10
Date: Sat, 06 Aug 2011 16:02:42 -0400
From: Louis McFadin <w5did@xxx.xxx>
Subject: [amsat-bb] Re: AMSAT-BB Digest, Vol 6, Issue 438
To: amsat-bb@xxxxx.xxx
Message-ID: <71050F1B-FA3D-4B73-9728-881FC71EA544@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
On Aug 6, 2011, at 3:00 PM, amsat-bb-request@xxxxx.xxx wrote:
> Send AMSAT-BB mailing list submissions to
> amsat-bb@xxxxx.xxx
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://amsat.org/mailman/listinfo/amsat-bb
> or, via email, send a message with subject or body 'help' to
> amsat-bb-request@xxxxx.xxx
>
> You can reach the person managing the list at
> amsat-bb-owner@xxxxx.xxx
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of AMSAT-BB digest..."
>
>
> Today's Topics:
>
> 1. Re: ARISSatTLM (Mark L. Hammond)
> 2. VS: ARISSatTLM (Jari Koivurinne)
> 3. Re: ARISSatTLM (N0JY)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 06 Aug 2011 13:44:40 -0400
> From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> Subject: [amsat-bb] Re: ARISSatTLM
> To: n0jy@xxxx.xxxx AMSAT-BB@xxxxx.xxx
> Message-ID: <H5ks1h00756cfur055ksK6@xxxxx.xxx>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi Jerry,
>
> Is there anything between the speaker out and line in (or mic) on the
sound card?
>
> What are you using for radio/Doppler control?
>
> Mark N8MH
>
> At 11:31 AM 8/6/2011 -0500, N0JY wrote:
>> I'm having trouble getting telemetry.
>> ARISSatTLM will see the signal on the Tuning Indicator and I have tuned
>> the CW signal everywhere from the yellow mark to the top and bottom of
>> the blue range.
>> It decodes the CW fine in the Morse Code Decoder window but nothing ever
>> shows up in the Telemetry As Text or ARISSatTLM main window.
>> The orange indicator is following something, usually hanging around the
>> middle of the orange line range when there is a signal.
>> Any thoughts? Windows Vista SP2 with M-Audio Delta44 sound card set for
>> 48000Hz sample rate.
>>
>> Thanks!
>> Jerry
>> N0JY
>>
>>
Make sure your receiver has any noise filters turned off. They can prevent
the decoder sw from working.
>> __________ Information from ESET NOD32 Antivirus, version of virus
signature database 6356 (20110806) __________
>>
>> The message was checked by ESET NOD32 Antivirus.
>>
>> http://www.eset.com
>>
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 6 Aug 2011 17:51:37 -0000
> From: "Jari Koivurinne" <jari.koivurinne@xxxx.xxx>
> Subject: [amsat-bb] VS: ARISSatTLM
> To: <n0jy@xxxx.xxx>, <AMSAT-BB@xxxxx.xxx>
> Message-ID: <000c01cc5461$7d2e50d0$778af270$@xxxxxxxxxx@xxxx.xxx>
> Content-Type: text/plain; charset="us-ascii"
>
>>
>> I'm having trouble getting telemetry.
>> ARISSatTLM will see the signal on the Tuning Indicator and I have tuned
>> the CW signal everywhere from the yellow mark to the top and bottom of
>> the blue range.
>> It decodes the CW fine in the Morse Code Decoder window but nothing
>> ever
>> shows up in the Telemetry As Text or ARISSatTLM main window.
>> The orange indicator is following something, usually hanging around the
>> middle of the orange line range when there is a signal.
>> Any thoughts? Windows Vista SP2 with M-Audio Delta44 sound card set
>> for
>> 48000Hz sample rate.
>>
>> Thanks!
>> Jerry
>> N0JY
>>
>
>
> I was also having trouble getting telemetry. Signal was quite strong and
> all indicators was within range. The telemetry and CW stopped twice within
> pass. CW was decoded but maybe the deep QSB made some impact to the
> telemetry.
> I have 2x 17 el horizontal yagis, FT-847 and Realtek AC97 audio system.
> Sampe rate was 44.1 kHz.
> Next time I try Edirol UA-1 USB sound card. Have to set alarm clock at 4 am
> local time as this is the only time ISS is well above horizon... :-)
>
> And please try the ARISSatTLM software and decode some frames as it is no
> help if you just say you can hear some noise...
>
> -jari oh3uw
>
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 06 Aug 2011 13:03:23 -0500
> From: N0JY <n0jy@xxxxxxx.xxx>
> Subject: [amsat-bb] Re: ARISSatTLM
> To: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
> Cc: AMSAT-BB@xxxxx.xxx
> Message-ID: <4E3D81EB.50804@xxxxxxx.xxx>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi Mark,
>
> I'm using the speaker output so it's speaker audio with no additional
> filters, right to the Delta44 breakout box.
> SatPC32 does the doppler, it's set for 20Hz interval. Should I set that
> lower, to 10Hz perhaps?
> I am going to try to use the audio from the data output on the FT-736R.
> A brain fade on my part prevented me from getting the signal off the
> ring of the stereo connection, but I just woke up and remembered that I
> have the splitters for that so I've got that connected to the breakout
> box now!
>
> 73,
> Jerry
>
> On 8/6/2011 12:44 PM, Mark L. Hammond wrote:
>> Hi Jerry,
>>
>> Is there anything between the speaker out and line in (or mic) on the
sound card?
>>
>> What are you using for radio/Doppler control?
>>
>> Mark N8MH
>>
>
>
> __________ Information from ESET NOD32 Antivirus, version of virus
signature database 6356 (20110806) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>
>
>
> ------------------------------
>
> _______________________________________________
> Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> http://amsat.org/mailman/listinfo/amsat-bb
>
>
> End of AMSAT-BB Digest, Vol 6, Issue 438
> ****************************************
------------------------------
Message: 11
Date: Sat, 06 Aug 2011 20:05:57 +0000
From: "Bato, Andras" <bato@xxxxxxx.xx>
Subject: [amsat-bb] SatPC32
To: amsat-bb@xxxxx.xxx
Message-ID: <4E3D9EA5.4080806@xxxxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-2; format=flowed
Hi Eric ON4HF,
I wonder which version of SatPC32 are you using?
I have put your lines into DOPPLER.SQF file but it does not do any change!
Isn't there any mistake in those lines?
Otherwise nasa.all file does not contain RADIOSCAF-B data!
It can be found in amateur.txt list only!
gl de ha6nn
Andras
------------------------------
Message: 12
Date: Sat, 6 Aug 2011 13:35:18 -0700 (PDT)
From: Nader Omer <st2nh@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1 Transponder Active.
To: amsat bb bb <amsat-bb@xxxxx.xxx>
Message-ID:
<1312662918.9723.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hi
?
ARISSat-1 transponder is active .with very poor noisy downlink?and deep QSB .
Listen to part of the downlink Audio
?
?http://www.youtube.com/watch?v=-U8ZE5_DpqI
?
73?s
Nader
------------------------------
Message: 13
Date: Sat, 6 Aug 2011 16:48:16 -0400
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: ARR Preamp Help
To: "Dee" <morsesat@xxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS217328700463F827E28BCBB33F0@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Thanks for the responses everyone. And Dee, no, I am not a handy tech -
obviously! I transmitted probably 2-3 times through it using 35w, 1-2
second each, then it blew. Like you, Mark, I am a little surprised it blew
so quickly, but oh well.
Thanks!
Zack
KD8KSN (aka reckless preamp handler) =P
-----Original Message-----
From: Dee
Sent: Saturday, August 06, 2011 3:51 PM
To: 'Zachary Beougher' ; amsat-bb@xxxxx.xxx
Subject: RE: [amsat-bb] ARR Preamp Help
You have blown it--If you are not a handy tech. - Send it back to ARR
and they have a flat fee for repairs. Check with them on the
internet.
73,
Dee, NB2F
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx
On Behalf Of Zachary Beougher
Sent: Saturday, August 06, 2011 3:40 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ARR Preamp Help
Hi All,
I was monitoring some passes while mobile today, and amidst all of the
confusion of messing with coax and frequencies, I accidently
transmitted on 440, through the preamp, with 35w (the relay is rated
at 25w). I thought I had switched the VFO back to 2m, but I guess
not. It was only for a split second, but since that every time I turn
the preamp on it automatically knocks out all received signal. Does
anyone have any idea on what I need to do/check to see what I did to
it? I have heard of this happening, I just need to know what path to
take now to get it fixed.
It is worth mentioning that I can receive fine with the preamp
in-line, but the minute I throw the power switch it knocks out all
receive (just static, no received audio). I have not changed any of
the connections, so having a coax hooked up backwards is not the
issue.
Thanks,
Zack
KD8KSN
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
author.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 14
Date: Sat, 6 Aug 2011 17:27:24 -0400
From: Dave Webb KB1PVH <kb1pvh@xxxxx.xxx>
Subject: [amsat-bb] Re: SatPC32
To: "Bato, Andras" <bato@xxxxxxx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<CAEMY9Fd7=EJ7QHsEfLwT6hAj6bCjMz=u7x+CHk0vCNy55nHTpg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
The AMSAT keps get updated once a week or so, at this point Radioscaf-B
isn't there. You'll have better luck with CelesTrac keps.
Dave - KB1PVH
Sent from my Verizon Wireless DROID X
On Aug 6, 2011 4:24 PM, "Bato, Andras" <bato@xxxxxxx.xx> wrote:
> Hi Eric ON4HF,
>
> I wonder which version of SatPC32 are you using?
>
> I have put your lines into DOPPLER.SQF file but it does not do any change!
>
> Isn't there any mistake in those lines?
>
> Otherwise nasa.all file does not contain RADIOSCAF-B data!
>
> It can be found in amateur.txt list only!
>
> gl de ha6nn
> Andras
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 15
Date: Sat, 6 Aug 2011 17:28:16 -0400
From: Dave Webb KB1PVH <kb1pvh@xxxxx.xxx>
Subject: [amsat-bb] Re: SatPC32
To: "Bato, Andras" <bato@xxxxxxx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<CAEMY9FdONy4FhE9bFV4TaSZV9c8zbzY7hpmgSCNQQpK7-JaG=A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Oops, I didn't read the whole post. Nevermind.
Dave - KB1PVH
Sent from my Verizon Wireless DROID X
On Aug 6, 2011 4:24 PM, "Bato, Andras" <bato@xxxxxxx.xx> wrote:
> Hi Eric ON4HF,
>
> I wonder which version of SatPC32 are you using?
>
> I have put your lines into DOPPLER.SQF file but it does not do any change!
>
> Isn't there any mistake in those lines?
>
> Otherwise nasa.all file does not contain RADIOSCAF-B data!
>
> It can be found in amateur.txt list only!
>
> gl de ha6nn
> Andras
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 16
Date: Sat, 6 Aug 2011 21:32:29 +0000 (UTC)
From: wa4hfn@xxxxxxx.xxx
Subject: [amsat-bb] 5 in em55
To: AMSAT <amsat-bb@xxxxx.xxx>
Message-ID:
<1127931184.19040.1312666349055.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Congrats to Larry KI6YAA Award #20 for 5 in EM55
WA4HFN EM55 Damon
------------------------------
Message: 17
Date: Sat, 06 Aug 2011 13:54:17 -0800
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: ARR Preamp Help
To: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>, "Dee"
<morsesat@xxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <201108062154.p76LsIpe004603@xxxxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Another thing that may have gone is the RF sensing circuit that is
probably set for 25w max. RF switched preamps are more susceptible
to burn-out as they rely on fast switching of the preamp bypass
circuit. Even a few milliseconds delay will allow enough RF energy
to zap the delicate GasFet in the preamp. This is why we suggest
using a sequencer to control RF switching before RF is
generated. Its not done much by satellite operators but very common
by mw and eme stations.
Some high-end radios have transmit RF delay settings available in
their menu. if you radio has such, add 50-100 ms delay will provide
much more protection.
You know re-reading your comments I wonder if you transmitted 440-MHz
thru a 144-MHz preamp? The RF sense circuit might not detect 440 as
well as 144 MHz. That is why radio with separate VHF and UHF
antennas are preferred.
Best to return to ARR for repair - it is a flat rate.
I have repaired many ARR P144VDG over the years.
73, Ed - KL7UW
At 12:48 PM 8/6/2011, Zachary Beougher wrote:
>Thanks for the responses everyone. And Dee, no, I am not a handy tech -
>obviously! I transmitted probably 2-3 times through it using 35w, 1-2
>second each, then it blew. Like you, Mark, I am a little surprised it blew
>so quickly, but oh well.
>
>Thanks!
>
>Zack
>KD8KSN (aka reckless preamp handler) =P
>
>-----Original Message-----
>From: Dee
>Sent: Saturday, August 06, 2011 3:51 PM
>To: 'Zachary Beougher' ; amsat-bb@xxxxx.xxx
>Subject: RE: [amsat-bb] ARR Preamp Help
>
>You have blown it--If you are not a handy tech. - Send it back to ARR
>and they have a flat fee for repairs. Check with them on the
>internet.
>73,
>Dee, NB2F
>
>-----Original Message-----
>From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx
>On Behalf Of Zachary Beougher
>Sent: Saturday, August 06, 2011 3:40 PM
>To: amsat-bb@xxxxx.xxx
>Subject: [amsat-bb] ARR Preamp Help
>
>Hi All,
>
>I was monitoring some passes while mobile today, and amidst all of the
>confusion of messing with coax and frequencies, I accidently
>transmitted on 440, through the preamp, with 35w (the relay is rated
>at 25w). I thought I had switched the VFO back to 2m, but I guess
>not. It was only for a split second, but since that every time I turn
>the preamp on it automatically knocks out all received signal. Does
>anyone have any idea on what I need to do/check to see what I did to
>it? I have heard of this happening, I just need to know what path to
>take now to get it fixed.
>
>It is worth mentioning that I can receive fine with the preamp
>in-line, but the minute I throw the power switch it knocks out all
>receive (just static, no received audio). I have not changed any of
>the connections, so having a coax hooked up backwards is not the
>issue.
>
>Thanks,
>
>Zack
>KD8KSN
>
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
>author.
>Not an AMSAT-NA member? Join now to support the amateur satellite
>program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
>_______________________________________________
>Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-60w, 3400-?
DUBUS Magazine USA Rep dubususa@xxxxx.xxx
======================================
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 439
****************************************
Read previous mail | Read next mail
| |
