| |
CX2SA > SATDIG 06.01.09 21:23l 229 Lines 8106 Bytes #999 (0) @ WW
BID : 64944_CX2SA
Read: GUEST
Subj: AMSAT-BB-digest V4 15
Path: IZ3LSV<IK2XDE<F5GOV<F4BWT<F1BBI<CX2SA
Sent: 090106/2016Z @:CX2SA.LAV.URY.SA #:64944 [Minas] FBB7.00e $:64944_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Yaesu FT-847 Earth Station For Sale (Sebastian)
2. Re: Still not getting into the ISS... (G0MRF@xxx.xxxx
3. Re: Still not getting into the ISS... (Gordon JC Pearce MM3YEQ)
4. Re: Still not getting into the ISS... (Roger Kolakowski)
----------------------------------------------------------------------
Message: 1
Date: Tue, 6 Jan 2009 11:10:45 -0500
From: Sebastian <w4as@xxxxxxxxx.xxx>
Subject: [amsat-bb] Yaesu FT-847 Earth Station For Sale
To: FT847@xxxxxxxxxxx.xxxx AMSAT BB <AMSAT-BB@xxxxx.xxx>,
SoFlaHams@xxxxxxxxxxx.xxxx ham4sale@xxxxxxxxxxx.xxxxxxxx Contesting
Reflector <vhfcontesting@xxxxxxxxxx.xxx>
Message-ID: <D0F9A44A-6657-4CEC-9C5A-D8AF3193C517@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
I've decided to go up a bit on frequency and bought an Icom IC-910H.
I have my Yaesu FT-847 up for sale. The serial number is 2K640043.
This one doesn't have the CAT problem which the early ones did with
rig control.
I have used it exclusively on the ham radio satellites (ask anyone who
is active on satellites about how it sounds). The rig is in very good
condition, there are no visible scratches or dings on it anywhere. I
have the original box, the manual, the very large technical supplement
manual, power cord and original invoice dated 12/09/02 from AES. I
don't have the original box, however it will be packaged securely and
will be double-boxed. I use FedEx for shipping. Price with Yaesu
MD-100 base microphone is $1,000. Without microphone - $900. Note
that I don't have the original stock hand mike.
Pictures available upon request. If you'd like to speak to me, send
me your phone number and I'll call you on my dime. USPS money orders
ONLY - no PayPal.
73 de W4AS
Sebastian
------------------------------
Message: 2
Date: Tue, 6 Jan 2009 12:57:17 EST
From: G0MRF@xxx.xxx
Subject: [amsat-bb] Re: Still not getting into the ISS...
To: RogerKola@xxx.xxxx amsat-bb@xxxxx.xxx
Message-ID: <ce8.484cb9f4.3694f57d@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hi Roger.
In the recent past the squelch appears to have been set fairly high. As
witnessed by the repeated signals being essentially noise free.
It is now much easier to track the correct uplink on 2m as the doppler shift
is small compared to the 12.5kHz or so (a guess) bandwidth of the ISS
receivers IF filter.
Unfortunately, I believe the D800 is unable to operate with the squelch open
due to overheating problems. Not that anyone is complaining, this ARISS
operation is great!
But the D800 is not a purpose built satellite repeater. Given a choice, a
SO50 type approach would give easier access for operators while saving power /
heating and RF pollution. A CTCSS detector that initiated a timer, or perhaps
a system that simply allowed the repeater to stay open for 10 or 15 seconds
after loss of the tone would allow people to 'net' onto the correct uplink
frequency, or hear when their signal had a fade or collision with another
station.
I suppose the ARISS equipment will be upgraded at some point in the future
and maybe some dedicated hardware with simple to operate controls for the crew
(and remote commanding from the ground) will overcome these minor problems
with an otherwise very successful system.
Still, 5 Watts downlink is quite amazing and unlike any conventional
satellite we have. Where's my 2m amp......
Regards
David G0MRF
In a message dated 06/01/2009 10:07:23 GMT Standard Time, rogerkola@xxx.xxx
writes:
An interesting thought...could they have the squelch engaged while also
requiring tone? I personally haven't been able to get in on 80 degree passes
over New England with 25 watts and an omni at 5:30 AM local time.
Reception is just fine, but there are a lot of "empty" spaces in between
contacts that could be collisions I guess...
Roger
WA1KAT
------------------------------
Message: 3
Date: Tue, 06 Jan 2009 18:46:37 +0000
From: Gordon JC Pearce MM3YEQ <gordonjcp@xxxx.xxx>
Subject: [amsat-bb] Re: Still not getting into the ISS...
To: amsat-bb@xxxxx.xxx
Message-ID: <1231267597.5820.8.camel@xxxxx>
Content-Type: text/plain
On Tue, 2009-01-06 at 12:57 -0500, G0MRF@xxx.xxx wrote:
> Hi Roger.
>
> In the recent past the squelch appears to have been set fairly high. As
> witnessed by the repeated signals being essentially noise free.
> It is now much easier to track the correct uplink on 2m as the doppler
shift
> is small compared to the 12.5kHz or so (a guess) bandwidth of the ISS
> receivers IF filter.
So 5kHz steps should be "close enough"?
> Still, 5 Watts downlink is quite amazing and unlike any conventional
> satellite we have. Where's my 2m amp......
Well I can't use more than 10W anyway, and the only transceiver I have
that does CTCSS has only 5W output.
I wonder if it's worth pointing the 6-element quad at it? I haven't
really used that yet, since I don't have a tower to put it on, and it's
a bit awkward to use hand-held ;-)
Gordon
------------------------------
Message: 4
Date: Tue, 6 Jan 2009 13:44:49 -0500
From: "Roger Kolakowski" <rogerkola@xxx.xxx>
Subject: [amsat-bb] Re: Still not getting into the ISS...
To: <G0MRF@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <001401c9702e$dc885ae0$0300a8c0@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi David...
Thanks for your input...I was just confirming that I was observing the same
thing...I know that Miles, WF1F, has explained the lack of gravity eliminates
inductive cooling on the rigs, causing the higher temperatures they are
seeing.
I actually have no complaints here...I have cards from several contacts with
the Station and one with MIR that I can look at during passes ;-)...the U/V
repeater was also very good to me and UNPROTO during packet operations is
plenty of fun.
I was just throwing in my 2 pence as to why this particular mode was
presenting some new challenges...
I have the amp and a beam, but I'd just as soon leave them out of line to give
others an opportunity...(besides our pass times here are still in the middle
of the night as far as I am concerned ;-)
Best 73 es DX
Roger
WA1KAT
----- Original Message -----
From: G0MRF@xxx.xxx
To: RogerKola@xxx.xxx ; amsat-bb@xxxxx.xxx
Sent: Tuesday, January 06, 2009 12:57 PM
Subject: Re: [amsat-bb] Re: Still not getting into the ISS...
Hi Roger.
In the recent past the squelch appears to have been set fairly high. As
witnessed by the repeated signals being essentially noise free.
It is now much easier to track the correct uplink on 2m as the doppler shift
is small compared to the 12.5kHz or so (a guess) bandwidth of the ISS
receivers IF filter.
Unfortunately, I believe the D800 is unable to operate with the squelch open
due to overheating problems. Not that anyone is complaining, this ARISS
operation is great!
But the D800 is not a purpose built satellite repeater. Given a choice, a
SO50 type approach would give easier access for operators while saving power /
heating and RF pollution. A CTCSS detector that initiated a timer, or perhaps
a system that simply allowed the repeater to stay open for 10 or 15 seconds
after loss of the tone would allow people to 'net' onto the correct uplink
frequency, or hear when their signal had a fade or collision with another
station.
I suppose the ARISS equipment will be upgraded at some point in the future
and maybe some dedicated hardware with simple to operate controls for the crew
(and remote commanding from the ground) will overcome these minor problems
with an otherwise very successful system.
Still, 5 Watts downlink is quite amazing and unlike any conventional
satellite we have. Where's my 2m amp......
Regards
David G0MRF
------------------------------
_______________________________________________
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 4, Issue 15
***************************************
Read previous mail | Read next mail
| |
