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CX2SA > SATDIG 08.02.10 08:24l 782 Lines 24052 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V5 71
Path: IZ3LSV<IK2XDE<DB0RES<WA7V<CX2SA
Sent: 100208/0615Z @:CX2SA.LAV.URY.SA #:38676 [Minas] FBB7.00e $:AMSATBB571
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: HO-68 Schedule - 07-21 Feb 2010 (Henk, PA3GUO)
2. Re: AO-27 Event Timing (George Henry)
3. Re: AO-27 Event Timing (George Henry)
4. Re: LVB Tracker (Best rotor interface) (Howard Long)
5. lvbtracker (or other) and AlfaSpid rotors? (Bruce Robertson)
6. Re: HO-68 Schedule - 07-21 Feb 2010 (Peter Scheller)
7. Re: lvbtracker (or other) and AlfaSpid rotors? (John Heath)
8. Re: HO-68 Schedule - 07-21 Feb 2010 (Edward Cole)
9. Re: HO-68 Schedule - 07-21 Feb 2010 (Greg D.)
10. n3fjp logging + eqso + ADIF format - please help
(Michae J. Wolthuis)
11. shuttle launch coming up the coast? (Tyler Harpster)
12. Re: n3fjp logging + eqso + ADIF format - please help
(jeffk13057@xxxxx.xxxx
13. Re: n3fjp logging + eqso + ADIF format - please help
(David - KG4ZLB)
14. Re: shuttle launch coming up the coast? (David - KG4ZLB)
15. Re: shuttle launch coming up the coast? (Tyler Harpster)
16. EM80 (Andrew Glasbrenner)
17. FT-847 - relating dbm to S units (Phil)
18. ND9M Road Trip Update (claryco@xxx.xxxx
19. Re: FT-847 - relating dbm to S units (Edward Cole)
----------------------------------------------------------------------
Message: 1
Date: Sun, 7 Feb 2010 21:23:41 +0100 (CET)
From: "Henk, PA3GUO" <hamoen@xxx.xx>
Subject: [amsat-bb] Re: HO-68 Schedule - 07-21 Feb 2010
To: <amsat-bb@xxxxx.xxx>
Message-ID: <53130.212.61.80.117.1265574221.squirrel@xxxxxxx.xxx.xx>
Content-Type: text/plain; charset=iso-8859-1
Thanks Alan !
Will again be a lot of fun and experimenting !
Henk, PA3GUO
http://www.youtube.com/watch?v=o6oDgUTHCwg
------------------------------
Message: 2
Date: Sun, 7 Feb 2010 15:01:27 -0600
From: "George Henry" <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: AO-27 Event Timing
To: "amsat bb" <amsat-bb@xxxxx.xxx>
Message-ID: <5EB062B33EDB4F209B318DBDE5115AAC@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
The listings on the AO-27 website are not correct at this time.... this
happens every once in a while, where the website gets out-of-sync with the
satellite for some reason (it's about 7 minutes behind right now).
If you use the Java schedule lister instead, written by my son, you will get
accurate listings. The lister is available to download at
http://sites.google.com/site/ao27satellitescheduler. Many users here on the
BB will vouch for its accuracy.
George, KA3HSW
----- Original Message -----
From: "Rowland Archer" <rarcher@xxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, February 07, 2010 1:05 PM
Subject: [amsat-bb] AO-27 Event Timing
> About a month ago the events that turn AO-27 on and off seemed to be
> timed so it would be on as it passed over North America. More
> recently, for the passes I check (more than 10 degrees here in NC),
> it seems like according to schedule on www.ao27.org, the "ON" time is
> when the bird has pretty much finished its pass.
>
> For example, right now at 1858, the footprint of AO-27 neatly covers
> much of the US and Canada, yet according to the website the next "ON"
> event is at 1906, one minute before I lose the satellite completely.
>
> Is this intentional or "just the way it is?" Does it slowly cycle the
> ON time so it is ON for passes in different parts of the world?
>
> 73,
> Rowland K4XD
>
------------------------------
Message: 3
Date: Sun, 7 Feb 2010 15:02:37 -0600
From: "George Henry" <ka3hsw@xxx.xxx>
Subject: [amsat-bb] Re: AO-27 Event Timing
To: <amsat-bb@xxxxx.xxx>, "Rowland Archer" <rarcher@xxxxxxxx.xxx>
Message-ID: <CCE66034536C4BE5925582A283B385B9@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Correction... the website is about 10 minutes behind the satellite now.
George, KA3HSW
------------------------------
Message: 4
Date: Sun, 7 Feb 2010 21:10:08 -0000
From: "Howard Long" <howard@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: LVB Tracker (Best rotor interface)
To: <pe0sat@xxxxx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <004a01caa839$ee1b28c0$ca517a40$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hi Jan
> One thing I run into, the kit and enclosure from NA and UK aren't
> compatible.
Could you let me know what the incompatibility is?
> The one I received also had a couple of PCB defects causing it difficult
> the get it working.
What were these PCB defects? The PCB design hasn't altered for many years,
and I'm not aware of any rework required.
73, Howard G6LVB
------------------------------
Message: 5
Date: Sun, 7 Feb 2010 17:34:13 -0400
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
Subject: [amsat-bb] lvbtracker (or other) and AlfaSpid rotors?
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<49657a761002071334n17015d9cm9de43e37134395f2@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
The Alfa Spid price list
http://alfaradio.ca/docs/AlfaSpid_Price_June15_2009.pdf indicates that
the az/el rotor alone is about $600 (CAD) cheaper than the rotor with
controller. I understand that this controller is a very nice piece of
kit, and many are quite pleased with, for instance, its mouse
interface. However, that additional charge moves the purchase from the
'maybe one day' to the 'no way Jose' column.
So I'm wondering if anyone has experience with third-party controllers
to operate the Alfa Spid rotors. Are they electrically similar to
other rotors, or is the proprietary controller absolutely necessary?
73, Bruce VE9QRP
--
http://ve9qrp.blogspot.com
------------------------------
Message: 6
Date: Sun, 7 Feb 2010 11:56:51 -1000
From: Peter Scheller <nh6vb@xxx.xxx>
Subject: [amsat-bb] Re: HO-68 Schedule - 07-21 Feb 2010
To: <alankung@xxxxxxx.xxx.xxx.xx>, amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID: <BAY141-W1773FD252300812ED9DBD7E1520@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Thank you Alan, thank you, thank you. Mahalo nui loa.
Aloha,
Peter NH6VB
> From: alankung@xxxxxxx.xxx.xxx.xx
> To: amsat-bb@xxxxx.xxx
> Date: Mon, 8 Feb 2010 02:17:40 +0800
> Subject: [amsat-bb] HO-68 Schedule - 07-21 Feb 2010
>
..........................snip.....................
_________________________________________________________________
Hotmail: Powerful Free email with security by Microsoft.
http://clk.atdmt.com/GBL/go/201469230/direct/01/
------------------------------
Message: 7
Date: Sun, 7 Feb 2010 22:28:40 +0000 (GMT)
From: John Heath <g7hia@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: lvbtracker (or other) and AlfaSpid rotors?
To: Bruce Robertson <ve9qrp@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <803211.21209.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Hi Bruce,
I guess a very good question would be - will the aclaimed LVB tracker
interface with the AlfaSid.
Someone on this bb is sure to know.
73 John G7HIA
?
________________________________
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Sent: Sunday, 7 February, 2010 21:34:13
Subject: [amsat-bb] lvbtracker (or other) and AlfaSpid rotors?
The Alfa Spid price list
http://alfaradio.ca/docs/AlfaSpid_Price_June15_2009.pdf indicates that
the az/el rotor alone is about $600 (CAD) cheaper than the rotor with
controller. I understand that this controller is a very nice piece of
kit, and many are quite pleased with, for instance, its mouse
interface. However, that additional charge moves the purchase from the
'maybe one day' to the 'no way Jose' column.
So I'm wondering if anyone has experience with third-party controllers
to operate the Alfa Spid rotors. Are they electrically similar to
other rotors, or is the proprietary controller absolutely necessary?
73, Bruce VE9QRP
--
http://ve9qrp.blogspot.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: 8
Date: Sun, 07 Feb 2010 14:46:58 -0900
From: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: HO-68 Schedule - 07-21 Feb 2010
To: "Henk, PA3GUO" <hamoen@xxx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <201002072346.o17NkwBI094852@xxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Listened to orbit #721 (per NOVA) (23:23-23:40 for my location) and
did not hear any activity nor my 145.825 (67Hz) uplink. I heard the
CW beacon on the previous pass, but not this time, though it was well
pass TCA when I looked for it.
Just wondering if it was my station or was the transponder
off? According to the new sked by Alan Kung, 07 Feb. 2300-2345 it
was to be on.
I am just finding out what my capabilities are with the new antennas, so...
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
500-KHz/CW, 144-MHz EME, 1296-MHz EME
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
======================================
------------------------------
Message: 9
Date: Sun, 7 Feb 2010 16:37:08 -0800
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: HO-68 Schedule - 07-21 Feb 2010
To: <kl7uw@xxxxxxxxx.xxx>, <hamoen@xxx.xx>, <amsat-bb@xxxxx.xxx>
Message-ID: <BLU133-W1A0CAAEA86F0C78E1DEBCA9510@xxx.xxx>
Content-Type: text/plain; charset="Windows-1252"
Hi Ed,
Were you in SSB or FM mode? I was on the earlier pass (20:00z) today, and
at least for that pass the bird was in SSB/CW mode. Had my first contact on
HO-68, a nice chat with Kerry, WC7V, in Montana. It was quite loud, like S5
when most birds barely move the needle. Really easy to copy. Great job,
CAMSAT!
Greg KO6TH
> Date: Sun, 7 Feb 2010 14:46:58 -0900
> To: hamoen@xxx.xxx amsat-bb@xxxxx.xxx
> From: kl7uw@xxxxxxxxx.xxx
> Subject: [amsat-bb] Re: HO-68 Schedule - 07-21 Feb 2010
>
>
>
> Listened to orbit #721 (per NOVA) (23:23-23:40 for my location) and
> did not hear any activity nor my 145.825 (67Hz) uplink. I heard the
> CW beacon on the previous pass, but not this time, though it was well
> pass TCA when I looked for it.
>
> Just wondering if it was my station or was the transponder
> off? According to the new sked by Alan Kung, 07 Feb. 2300-2345 it
> was to be on.
>
> I am just finding out what my capabilities are with the new antennas, so...
>
>
> 73, Ed - KL7UW, WD2XSH/45
> ======================================
> BP40IQ 500 KHz - 10-GHz www.kl7uw.com
> 500-KHz/CW, 144-MHz EME, 1296-MHz EME
> DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
> ======================================
>
> _______________________________________________
> 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
_________________________________________________________________
Hotmail: Trusted email with Microsoft?s powerful SPAM protection.
http://clk.atdmt.com/GBL/go/201469226/direct/01/
------------------------------
Message: 10
Date: Sun, 7 Feb 2010 20:19:36 -0500
From: "Michae J. Wolthuis" <wolthui3@xxx.xxx>
Subject: [amsat-bb] n3fjp logging + eqso + ADIF format - please help
To: <amsat-bb@xxxxx.xxx>
Message-ID: <008401caa85c$c7eee420$57ccac60$@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I really like n3fjp logging that everyone here recommended. I have not been
able to get eqso to upload though. It keeps telling me bad mode.
Can anyone who is using this software and eqso tell me what are you entering
for your AO-51 contacts in Band and Mode? I tried 2, 2M and SAT J in Band
and tried SAT, FM and FM (SAT) in Mode to no avail. Maybe I need to enable
a field or something? I have read the whole manual from the website and it
doesn't really talk about entering satellite contacts.
Thanks for any help, I really want to get my whole log uploaded to eqso.
Thanks,
Mike
Kb8zgl
------------------------------
Message: 11
Date: Sun, 7 Feb 2010 20:30:07 -0500
From: "Tyler Harpster" <tyler881@xxxxxxx.xxx>
Subject: [amsat-bb] shuttle launch coming up the coast?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <FE4953D9E1FA4867A066C8674D9FE517@xxxxxxxx>
Content-Type: text/plain; format=flowed; charset="Windows-1252";
reply-type=original
The rescheduled shuttle launch is for early Monday morning.
Is there any way of finding out what direction they are heading during
launch? It would be pretty cool to see it from the eastern seaboard if it
came up that way.
Thanks
KM3G, Tyler
Shrewsbury, PA
------------------------------
Message: 12
Date: Mon, 8 Feb 2010 01:38:06 +0000
From: jeffk13057@xxxxx.xxx
Subject: [amsat-bb] Re: n3fjp logging + eqso + ADIF format - please
help
To: "Michae J. Wolthuis" <wolthui3@xxx.xxx>,
amsat-bb-bounces@xxxxx.xxxxxxxxxxxxx@xxxxx.xxx
Message-ID:
<1667899689-1265593057-cardhu_decombobulator_blackberry.rim.net-2083220208-@xx
xxxx.xxxx.xxxx.xx.xxxxxxxxxx>
Content-Type: text/plain
Are you talking about EQSL? I'm not familiar with EQso.
73 Jeff WB2SYK
------Original Message------
From: Michae J. Wolthuis
Sender: amsat-bb-bounces@xxxxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] n3fjp logging + eqso + ADIF format - please help
Sent: Feb 7, 2010 20:19
I really like n3fjp logging that everyone here recommended. I have not been
able to get eqso to upload though. It keeps telling me bad mode.
Can anyone who is using this software and eqso tell me what are you entering
for your AO-51 contacts in Band and Mode? I tried 2, 2M and SAT J in Band
and tried SAT, FM and FM (SAT) in Mode to no avail. Maybe I need to enable
a field or something? I have read the whole manual from the website and it
doesn't really talk about entering satellite contacts.
Thanks for any help, I really want to get my whole log uploaded to eqso.
Thanks,
Mike
Kb8zgl
_______________________________________________
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 from my Verizon Wireless BlackBerry
------------------------------
Message: 13
Date: Sun, 07 Feb 2010 21:03:47 -0500
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: n3fjp logging + eqso + ADIF format - please
help
To: amsat-bb@xxxxx.xxx
Message-ID: <4B6F7103.3000505@xxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
For uploads from N3FJP to eQSL:
AO-51; Band = 2 (if its in V/U); Mode = FM; Prop_Mode = SAT
Of course this changes as AO-51's operating mode changes.
L/U for instance would be Band = 23
73
David
KG4ZLB
On 2/7/2010 20:19, Michae J. Wolthuis wrote:
> I really like n3fjp logging that everyone here recommended. I have not been
> able to get eqso to upload though. It keeps telling me bad mode.
>
>
>
> Can anyone who is using this software and eqso tell me what are you entering
> for your AO-51 contacts in Band and Mode? I tried 2, 2M and SAT J in Band
> and tried SAT, FM and FM (SAT) in Mode to no avail. Maybe I need to enable
> a field or something? I have read the whole manual from the website and it
> doesn't really talk about entering satellite contacts.
>
>
>
> Thanks for any help, I really want to get my whole log uploaded to eqso.
>
>
>
> Thanks,
>
> Mike
>
> Kb8zgl
>
>
>
> _______________________________________________
> 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: Sun, 07 Feb 2010 21:07:27 -0500
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: shuttle launch coming up the coast?
To: amsat-bb@xxxxx.xxx
Message-ID: <4B6F71DF.1000000@xxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
I believe after launch it heads out eastwards towards Europe which is
why one of the emergency landing sites is in Spain.
From here (EL96 - the other side of Florida) I get some great views at
night as it launches but once it starts heading out I quickly lose it.
I may be wrong of course but someone else can provide the detail I am sure!
73
David
KG4ZLB
On 2/7/2010 20:30, Tyler Harpster wrote:
> The rescheduled shuttle launch is for early Monday morning.
>
> Is there any way of finding out what direction they are heading during
> launch? It would be pretty cool to see it from the eastern seaboard if it
> came up that way.
>
> Thanks
> KM3G, Tyler
> Shrewsbury, PA
>
> _______________________________________________
> 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: Sun, 7 Feb 2010 21:42:24 -0500
From: "Tyler Harpster" <tyler881@xxxxxxx.xxx>
Subject: [amsat-bb] Re: shuttle launch coming up the coast?
To: <kg4zlb@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <33470F0505D44BCE96C3BF37F215FC11@xxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Yes, it heads east, but it has to match up with the ISS, so it has to match
the inclination of the ISS. It all depends on which orbit they're trying to
match up with the ISS as to what eastward direction they head after launch.
----- Original Message -----
From: "David - KG4ZLB" <kg4zlb@xxxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, February 07, 2010 9:07 PM
Subject: [amsat-bb] Re: shuttle launch coming up the coast?
>I believe after launch it heads out eastwards towards Europe which is
> why one of the emergency landing sites is in Spain.
>
> From here (EL96 - the other side of Florida) I get some great views at
> night as it launches but once it starts heading out I quickly lose it.
>
> I may be wrong of course but someone else can provide the detail I am
> sure!
>
> 73
>
> David
> KG4ZLB
>
>
>
> On 2/7/2010 20:30, Tyler Harpster wrote:
>> The rescheduled shuttle launch is for early Monday morning.
>>
>> Is there any way of finding out what direction they are heading during
>> launch? It would be pretty cool to see it from the eastern seaboard if
>> it
>> came up that way.
>>
>> Thanks
>> KM3G, Tyler
>> Shrewsbury, PA
>>
>> _______________________________________________
>> 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
>
------------------------------
Message: 16
Date: Sun, 07 Feb 2010 22:17:32 -0500
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] EM80
To: Amsat-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4B6F824C.5090605@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I'll likely be portable in EM80 tomorrow night and Tuesday. If someone
needs EM80 on satellite, drop me an email and I'll look out for you.
73, Drew KO4MA
------------------------------
Message: 17
Date: Mon, 8 Feb 2010 14:36:23 +1000
From: Phil <phillor@xxxxxxx.xxx>
Subject: [amsat-bb] FT-847 - relating dbm to S units
To: amsat-bb@xxxxx.xxx
Message-ID: <201002081436.23243.phillor@xxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Thank you for reading this.
I'm still trying to determine if the aerial I have is working correctly or
not.
If -120 dbm for a 12 db SINAD is considered the minimum usable signal,
what is the likely signal level required to indicate an S1 reading (at 435
MHz) on an FT-847 with the internal pre-amplifier turned on?
The Yaesu manual quotes 0.2 micro volts for a 12 db SINAD. How many S
points is likely to be?
--
Regards,
Phil
------------------------------
Message: 18
Date: Mon, 08 Feb 2010 00:25:43 -0500
From: claryco@xxx.xxx
Subject: [amsat-bb] ND9M Road Trip Update
To: amsat-bb@xxxxx.xxx
Message-ID: <8CC76964B3D172B-6528-36F9@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
We'll try to hit the DM86/DM87 and DM75/DM76 grid lines during the AO27 and
AO51 passes tomorrow (Monday) and continue the southbound trek along 104W.
We're currently holed up near the New Mexico border where we've got a few
inches of fresh snowfall and looking for up to several more overnight.
Predictions don't sound that bad though.
73,
Jim, ND9M / VQ9JC
Trinidad, CO / DM77
------------------------------
Message: 19
Date: Sun, 07 Feb 2010 21:11:55 -0900
From: Edward Cole <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: FT-847 - relating dbm to S units
To: Phil <phillor@xxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <201002080611.o186BuiK093661@xxxxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 07:36 PM 2/7/2010, Phil wrote:
>Thank you for reading this.
>
>I'm still trying to determine if the aerial I have is working correctly or
>not.
>
>If -120 dbm for a 12 db SINAD is considered the minimum usable signal,
>what is the likely signal level required to indicate an S1 reading (at 435
>MHz) on an FT-847 with the internal pre-amplifier turned on?
>
>The Yaesu manual quotes 0.2 micro volts for a 12 db SINAD. How many S
>points is likely to be?
>
>--
>Regards,
>Phil
>_______________________________________________
>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
0.2 uV is directly convertable to dBm (assuming 50-ohms
impedance). The answer is -121 dBm. I do not know where you found
-120 dBm as MDS (min. detectable signal) but the 0.2 uV spec it for
MDS on the FT-847 (for FM). For SSB it is 0.125 uV (-125 dBm). You
will not read any s-meter reading at MDS because the signal is equal
to noise (again by definition).
S-1 is (by definition) +6 dB over MDS (i.e. -115 dBM for FM and -119
dBm for FM). The FT-847 s-meter is not linear so it reads a bit off
from that. I calibrated my FT=-847 for FM some years ago, and can
recall that S-1 was something like +8 dB over MDS (but each radio
will differ a little so if you absolutely need to know then measure
it with a calibrated signal generator and a SINAD meter which was
designed for FM). (Note: by this reasoning S-9 = +54 dB over MDS,
but most cite that S-9 is +50 dB; see that reality is a bit murky here).
Do not be confused by the standard 12 dB SINAD. It is a standard
amount of signal quieting for making comparable measurements (very
over simplified definition). After 30-years experience making SINAD
measurements on radios I can estimate within about 3 dB by ear when a
signal is at 12 dB SINAD (obviously the meter makes more precise
measurements possible).
I hope this helps,
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
500-KHz/CW, 144-MHz EME, 1296-MHz EME
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
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End of AMSAT-BB Digest, Vol 5, Issue 71
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