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CX2SA > SATDIG 25.03.10 21:07l 663 Lines 19935 Bytes #999 (0) @ WW
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Sent: 100325/1904Z @:CX2SA.LAV.URY.SA #:48366 [Minas] FBB7.00e $:AMSATBB5135
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: ICOM AG-25, 2M Mast Mounted Preamplifier (Bob- W7LRD)
2. FT-726 automatic Doppler control? (Ryan Caron)
3. Re: FT-726 automatic Doppler control? (Jeff KB2M)
4. Re: FT-726 automatic Doppler control? (Alan P. Biddle)
5. Re: FT-726 automatic Doppler control? (Ryan Caron)
6. Neptune 30 CubeSat Launch (Trevor .)
7. Re: FT-726 automatic Doppler control? (Clive Wallis)
8. Re: FT-726 automatic Doppler control? (Jeff KB2M)
9. Kenwood TH7-DAG forsale heads up (Jeff KB2M)
10. Doppler Tracking ... Recent Radios (Clive Wallis)
11. gps question (Bob- W7LRD)
12. Re: gps question (Nigel Gunn G8IFF/W8IFF)
13. Jan/Feb Journal (Martha)
14. Dayton Rooms (Martha)
15. Last-minute change of location for Tucson hamfest on Saturday
(Patrick STODDARD (WD9EWK/VA7EWK))
----------------------------------------------------------------------
Message: 1
Date: Wed, 24 Mar 2010 19:27:36 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Re: ICOM AG-25, 2M Mast Mounted Preamplifier
To: W1LE Stan <stanw1le@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<1646596578.18132481269458856799.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
The preamp is the Icom AG-25, which in the past has had questionable or
unknown specs.? Thanks to Stan now we know.
73 Bob W7LRD
----- Original Message -----
From: "W1LE Stan" <stanw1le@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Wednesday, March 24, 2010 10:23:59 AM GMT -08:00 US/Canada Pacific
Subject: [amsat-bb] ?ICOM AG-25, 2M Mast Mounted Preamplifier
Hello The Net:
I recently got in Bob's (W7LRD) preamp for testing, with the following
results:
144 MHz ?G = 27 dB ? ? NF = 1.3 dB
145 ? ? ? ? ?G = 27 dB ? ? NF = 1.1 dB
146 ? ? ? ? ?G = 27 dB ? ? NF = 0.9 dB
147 ? ? ? ? ?G = 26 dB ? ? NF = 0.8 dB
148 ? ? ? ? ?G = 25 dB ? ? NF = 0.9 dB
Performance is better than I expected, but lotsa gain.
DC voltage applied was 14 Vdc and lowered to 8 Vdc with no change in NF,
but a 1 dB reduction in gain.
DC current was ~200 milliamperes at 14 V and 117 milliamperes at 8.0
volts applied.
Below 8 Vdc, the gain decreases rapidly and the NF increases.
I like the wide operating voltage range.
The RF connectors are UHF type.
There is a larger screw with a plastic washer underneath,
but upon removal there is NO adjustment underneath for neither pass band
tuning or gain reduction.
Reportedly there is a variable capacitor inside to allow tuning, but
nothing externally accessible.
Has anyone found a adjustment for gain ?
Only choice I can think of is to reduce the RF gain on the transceiver
when the preamp is menu enabled.
If an attenuator is put in line, the TX power would also be attenuated.
?We do not want to just throw away RF power in an attenuator
Stan, W1LE ? ? ? Cape Cod ? ? FN41sr ? ? Cape Cod
ZZZZz
_______________________________________________
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!
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------------------------------
Message: 2
Date: Wed, 24 Mar 2010 15:48:06 -0700
From: Ryan Caron <rcaron@xxxxx.xxx>
Subject: [amsat-bb] FT-726 automatic Doppler control?
To: amsat-bb@xxxxx.xxx
Message-ID: <4BAA96A6.7040400@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Anybody ever rig up automatic doppler tuning to a FT-726? Without a CI-V
interface (or equivalent) the best idea I can think of is splicing a
microcontroller in to push the up, down, and maybe the fast buttons on
the microphone during a pass.
Then I'd just have to dial in the initial frequency before the pass starts.
73,
Ryan KB1LKI
AMSAT #37207
------------------------------
Message: 3
Date: Wed, 24 Mar 2010 19:12:08 -0400
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] Re: FT-726 automatic Doppler control?
To: "'Ryan Caron'" <rcaron@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <013101cacba7$6d2b4650$4781d2f0$@xxx>
Content-Type: text/plain; charset="us-ascii"
There used to be a way to Doppler tune freq's via the data/packet port? I
vaguely remember something about being able to do this. Check the archives
late 1990's....
73 Jeff kb2m
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Ryan Caron
Sent: Wednesday, March 24, 2010 18:48 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] FT-726 automatic Doppler control?
Anybody ever rig up automatic doppler tuning to a FT-726? Without a CI-V
interface (or equivalent) the best idea I can think of is splicing a
microcontroller in to push the up, down, and maybe the fast buttons on
the microphone during a pass.
Then I'd just have to dial in the initial frequency before the pass starts.
73,
Ryan KB1LKI
AMSAT #37207
_______________________________________________
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: 4
Date: Wed, 24 Mar 2010 22:15:22 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: FT-726 automatic Doppler control?
To: "'Ryan Caron'" <rcaron@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <E8FF37DC675B446B9F3AE65F297D1178@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Ryan,
Remembering a loooong way back, but there is a RX-TX control which selects
which the frequency and other controls effect. That include the mike steps.
So you can use the mike click, but there is no good way to work with both TX
and RX. The clicks get spread between them. Back in the packsat days, I
set the uplink and left it alone. Then I switched to the RX and let the
AMSAT-TAPR interface do the frequency tracking. The DSP-2232 would also
work, though only for 1200 baud.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Ryan Caron
Sent: Wednesday, March 24, 2010 5:48 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] FT-726 automatic Doppler control?
Anybody ever rig up automatic doppler tuning to a FT-726? Without a CI-V
interface (or equivalent) the best idea I can think of is splicing a
microcontroller in to push the up, down, and maybe the fast buttons on
the microphone during a pass.
Then I'd just have to dial in the initial frequency before the pass starts.
73,
Ryan KB1LKI
AMSAT #37207
_______________________________________________
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: 5
Date: Wed, 24 Mar 2010 21:40:29 -0700
From: Ryan Caron <rcaron@xxxxx.xxx>
Subject: [amsat-bb] Re: FT-726 automatic Doppler control?
To: Jeff KB2M <kb2m@xxxxxxx.xxx>, APBIDDLE@xxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4BAAE93D.5090906@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Jeff, great memory, found a post dated 11/29/1999 from G3RWL (with the
descriptive subject "Re: Inquiry"). It refers to the G3RUH auto-tune
circuit that utilizes the mike click methods.
http://amsat.org/amsat/archive/amsat-bb/199911/msg00412.html
Alan, perhaps I can tap the VFO selector and switch back and forth
between mike clicks? It's no CAT interface, but maybe it'll do.
By the way I noticed the archives only go back to 2/98. Is there another
archive that goes back further, or is that the whole -bb?
On 3/24/10 4:12 PM, Jeff KB2M wrote:
> There used to be a way to Doppler tune freq's via the data/packet port? I
> vaguely remember something about being able to do this. Check the archives
> late 1990's....
>
> 73 Jeff kb2m
>
>
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of Ryan Caron
> Sent: Wednesday, March 24, 2010 18:48 PM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] FT-726 automatic Doppler control?
>
> Anybody ever rig up automatic doppler tuning to a FT-726? Without a CI-V
> interface (or equivalent) the best idea I can think of is splicing a
> microcontroller in to push the up, down, and maybe the fast buttons on
> the microphone during a pass.
>
> Then I'd just have to dial in the initial frequency before the pass starts.
>
> 73,
> Ryan KB1LKI
> AMSAT #37207
> _______________________________________________
> 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: 6
Date: Thu, 25 Mar 2010 08:28:20 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: [amsat-bb] Neptune 30 CubeSat Launch
To: amsat-bb@xxxxx.xxx
Message-ID: <324697.69655.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The 2U CubeSat MiniRomit1 is slated to launch on Neptune 30 in December.
http://www.southgatearc.org/news/march2010/miniromit_1.htm
73 Trevor M5AKA
Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/
Email Your News To: editor at southgatearc.org
Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm
----
------------------------------
Message: 7
Date: Thu, 25 Mar 2010 09:30:48 +0000
From: Clive Wallis <list1@xxxxx.xx.xx>
Subject: [amsat-bb] Re: FT-726 automatic Doppler control?
To: Ryan Caron <rcaron@xxxxx.xxx>, amsat <amsat-bb@xxxxx.xxx>
Message-ID: <4BAB2D48.9050500@xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I've done this very thing! I published details in OSCAR News 184,
December 2008, page
It uses a very cheap PICAXE 08M chip, which interfaces via the COM port
on the main computer. The program on the PICAXE is trivial. The
difficult part of the project was to interface the COM port with
SatExploer tracking program. I've no idea what would be involved with
other tracking programs.
A temporary package containing the source codes for both parts are on my
website www.g3cwv.co.uk/doppler.htm
I can e-mail a copy of the original article & circuits if needed.
BTW I've got a related question about doppler tracking which I'll raise
in a separate thread.
73 Clive G3CWV
Hitchin, North Hertfordshire, UK
Ryan Caron wrote:
> Anybody ever rig up automatic doppler tuning to a FT-726? Without a
> CI-V interface (or equivalent) the best idea I can think of is
> splicing a microcontroller in to push the up, down, and maybe the
> fast buttons on the microphone during a pass.
>
> Then I'd just have to dial in the initial frequency before the pass
> starts.
>
> 73, Ryan KB1LKI AMSAT #37207
------------------------------
Message: 8
Date: Thu, 25 Mar 2010 06:18:32 -0400
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] Re: FT-726 automatic Doppler control?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <001c01cacc04$860e4ca0$922ae5e0$@xxx>
Content-Type: text/plain; charset="us-ascii"
I remember this now. You would wire it up to the MIC connector, using the
MIC up/down switches to change frequency up/down. Also if I remember right,
the s/w would track the 1200 baud tones?
73 Jeff kb2m
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Alan P. Biddle
Sent: Wednesday, March 24, 2010 23:15 PM
To: 'Ryan Caron'; amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: FT-726 automatic Doppler control?
Ryan,
Remembering a loooong way back, but there is a RX-TX control which selects
which the frequency and other controls effect. That include the mike steps.
So you can use the mike click, but there is no good way to work with both TX
and RX. The clicks get spread between them. Back in the packsat days, I
set the uplink and left it alone. Then I switched to the RX and let the
AMSAT-TAPR interface do the frequency tracking. The DSP-2232 would also
work, though only for 1200 baud.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Ryan Caron
Sent: Wednesday, March 24, 2010 5:48 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] FT-726 automatic Doppler control?
Anybody ever rig up automatic doppler tuning to a FT-726? Without a CI-V
interface (or equivalent) the best idea I can think of is splicing a
microcontroller in to push the up, down, and maybe the fast buttons on
the microphone during a pass.
Then I'd just have to dial in the initial frequency before the pass starts.
73,
Ryan KB1LKI
AMSAT #37207
_______________________________________________
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: 9
Date: Thu, 25 Mar 2010 06:51:44 -0400
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] Kenwood TH7-DAG forsale heads up
To: <amsat-bb@xxxxx.xxx>
Message-ID: <002201cacc09$294462c0$7bcd2840$@xxx>
Content-Type: text/plain; charset="us-ascii"
I saw this on the TS-2000 yahoogroup this morning. Looks like a good deal on
a clean full duplex TH-D7...
73 Jeff kb2m
<http://groups.yahoo.com/group/KenwoodTS-2000/message/30133;_ylc=X3oDMTJyYnV
lcXRqBF9TAzk3MzU5NzE1BGdycElkAzIzNTQ3NzkEZ3Jwc3BJZAMxNzA1MDYzMTA4BG1zZ0lkAzM
wMTMzBHNlYwNkbXNnBHNsawN2bXNnBHN0aW1lAzEyNjk0ODc4MjA-> for sale th7-da(g)
Posted by: "paul glassman"
<mailto:highschooldiving@xxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
9> highschooldiving@xxxxx.xxx
<http://profiles.yahoo.com/highschooldiving> highschooldiving
Wed Mar 24, 2010 3:11 pm (PDT)
Like new. factory box, manual and everything it came with new. $325 shipped
conus.
best 73 paul w8jn
------------------------------
Message: 10
Date: Thu, 25 Mar 2010 13:07:47 +0000
From: Clive Wallis <amsat-bb@xxxxx.xx.xx>
Subject: [amsat-bb] Doppler Tracking ... Recent Radios
To: amsat <amsat-bb@xxxxx.xxx>
Message-ID: <4BAB6023.40103@xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
The thread about Doppler tracking with an FT-726 has reminded me of a
problem I have with an FT-736. I got this radio some time after
developing the interface for the 726.
I've noticed that when the 736 is under CAT control, none of the manual
controls work. I'm wondering whether this applies also to the FT-847 an
the ICOM 910 rigs?
One advantage of the method used on the FT-726 was that I could trim
out any errors in Doppler correction with the manual tuning control
knob. This proved very useful for BPSK telemetry.
As an alternative, do any of the modern tracking programs allow easy
manual correction of RX frequency during a pass?
Any comments would be much appreciated.
73 Clive G3CWV
Hitchin, North Hertfordshire, UK
------------------------------
Message: 11
Date: Thu, 25 Mar 2010 17:07:50 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] gps question
To: amsat-bb@xxxxx.xxx
Message-ID:
<1440727962.18499711269536870727.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello
Is there a GPS device that has the capability of
1. giving directions
2. showing lat/long or even grid squares
73 Bob W7LRD
------------------------------
Message: 12
Date: Thu, 25 Mar 2010 17:35:24 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: gps question
To: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4BAB9EDC.90105@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Garmin handheld units give grid squares and indicate directions.
If you want one that talks, possibly not.
On 25-Mar-10 17:07, Bob- W7LRD wrote:
>
>
>
>
> Hello
>
> Is there a GPS device that has the capability of
>
> 1. giving directions
>
> 2. showing lat/long or even grid squares
>
> 73 Bob W7LRD
>
> _______________________________________________
> 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
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.791 / Virus Database: 271.1.1/2768 - Release Date: 03/24/10
19:33:00
>
--
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF), e-mail nigel@xxxxx.xxx www
http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP
Club International #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC,
GCARES, XWARN.
------------------------------
Message: 13
Date: Thu, 25 Mar 2010 13:47:10 -0400
From: Martha <martha@xxxxx.xxx>
Subject: [amsat-bb] Jan/Feb Journal
To: AMSAT BB <amsat-bb@xxxxx.xxx>, Board of Directors <bod@xxxxx.xxx>,
senior-officers <senior-officers@xxxxx.xxx>
Message-ID:
<956751cf1003251047x78647253y58f7b933e70b452f@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
The Jan/Feb issue of the AMSAT Journal is now at the printer.
--
73- Martha
------------------------------
Message: 14
Date: Thu, 25 Mar 2010 13:50:58 -0400
From: Martha <martha@xxxxx.xxx>
Subject: [amsat-bb] Dayton Rooms
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID:
<956751cf1003251050x19beff95gde1cc1c06e36a27a@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Another reminder that AMSAT has available a block of rooms for Dayton. The
hotel is the Country Inn & Suites in Fairborn. The cost is $99 a night. If
you are interested, please call me at 301-589-6062 to make a reservation.
The block will be gone on April 13th! Don't forget the AMSAT-TAPR dinner on
Friday night. You can register for that online at the AMSAT website.
--
73- Martha
------------------------------
Message: 15
Date: Thu, 25 Mar 2010 11:01:39 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Last-minute change of location for Tucson hamfest
on Saturday
To: amsat-bb@xxxxx.xxx
Message-ID: <644075.61735.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
For anyone planning on attending the Tucson spring hamfest on Saturday,
27 March 2010, there has been a last-minute change of location. It will
now be hosted in a parking lot next to the Tucson Electric Park baseball
stadium, a few blocks west of the normal site at Kino Sports Complex.
The stadium is on Ajo Way, east of the I-10 freeway. The Radio Society
of Tucson will have signs showing the new location on Saturday morning.
All other details regarding the hamfest remain unchanged, and I will be
there with an AMSAT table and still do satellite demonstrations
throughout the morning.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
_______________________________________________
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 5, Issue 135
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