I agree with Wayne. I added a 2.1kHz INRAD filter on the receive side, and a Collins mechanical filter on the transmit side. The receive improved tremendously, even the DSP works better, and my local friends tell me the transmit audio sounds more natural.
I've never used a '910, so my observations are strictly relevant to the '847.
73, Jim KQ6EA
--- On Fri, 5/29/09, Wayne Estes <w9ae(a)charter.net> wrote:
> From: Wayne Estes <w9ae(a)charter.net>
> Subject: [amsat-bb] Re: FT-847 vs IC-910
> To: amsat-bb(a)amsat.org
> Date: Friday, May 29, 2009, 10:00 PM
> Not all FT-847's are alike. A
> stock FT-847 has wide, low-Q ceramic IF
> filters. My FT-847 has INRAD CW and SSB crystal
> filters that give
> narrower IF bandwidth, with MUCH higher Q. I haven't
> compared them, but
> I suspect that a FT-847 receiver with quality IF filters
> roughly on par with an IC-910.
> If shopping for a used FT-847, look for one with optional
> IF filters.
> Collins mechanical filters are an improvement over the
> stock ceramic
> filters, but crystal filters are even better.
> Wayne Estes W9AE
> Oakland, Oregon, USA
> Sent via AMSAT-BB(a)amsat.org.
> Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur
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>I/m interested in the possibility of using oscars 27, 29, 50, 51, and 52
>without using rotors or directional antennas and maybe while mobile. Uplink
>seems not to be a problem as one can always QRO to a level where the
>satellite sees an apropriate signal level that is enough but without robing
>power from other transponder users. On recieve though you still gotta be
>able to hear 'em to work 'em. Is an eggbeater and a preamp enough to hear
>decently or is there another (better) way? Is working mobile and/or without
>directional antennas even practical? what's the best way to do it?
And try the quadrifilars...You wont get much at low ELs, but on a
decent pass you will copy...use low loss coax, and good N connectors.
See the folder Antennaevaluation for some testing we've done..
73, Dave, WB6LLO
Disagree: I learn....
Pulling for P3E...
Hello to all,
I have a PacComm TINY-2 MK-2 TNC and would like to use it for ISS Packet.
My question is: Can I use it with a computer running MS Windows XP, or do I
need a DOS based OS to use this type TNC?
What software is necessary to run on Windows XP and possible APRS?
Thanks in advance,
Drew and Gould,
Thanks for getting A0-51 back up on the last pass. (around 0010utc)
Not sure who pulled the trigger, but I know both of you keep the bird
working for our ongoing communications.
Thanks again for the fast service,
Rick - WA4NVM
Just a resend first one come out with wrong date.
In view of what's is planned for the next P3E HEO i want to try some 10ghz band
I got a local Hamfest a Hughes LNA P/N 1011836-0009 personal earth station. My first
google search does not give any results nor a direct
call to Hughes company who even give less results...
This LNA has a N type connector on it marked IF a F connector marked LNC another F
marked POINTING and on the side another F connector on
probably the LNA model PLV-810A. There is a rotary adjustable ring for vertical or
horizonthal polarisation and a hand writing note
"10-15GHZ KU" the TX power is 1Watt.
If someone is aware ot the use of this PES or know where to get some manual it will
help me to see if i can put this on the air?
You can see a similar unit on e-bay at
Luc Leblanc VE2DWE
WAC BASIC CW PHONE SATELLITE
On 28 May 2009 at 12:26, n1jez(a)burlingtontelecom.net wrote:
> Hi Luc,
> What are you exactly trying to do? Are you trying to convert this into a 10 GHz transverter for use terrestrially on 10.368 GHz? Or are you
> looking at converting to a 'receive only' system on 10.450 GHz (P3E)
> From everything I've seen on these units, the transmit portion is Ku band and won't move down to 10 GHz (internally matched)
> Mike, N1JEZ
If feasable both as there is the TX and the RX on the same body. I think someone play with this unit as a handwriting note appears as "10-
15GHZ KU" but i have no clue for the transmit IF value nor the RX IF too. Is it possible theses unit can be wide enough to cover from 10
to 15GHZ it seems to be a bit extreme.
Without any specs it is hard to come up with some solution to have it working in our bands.
Luc Leblanc VE2DWE
WAC BASIC CW PHONE SATELLITE
The PES hasn't been around for a long time, almost 20 years. I don't have
manuals for this anymore and memory fades but the recive range is probably
11.7 to 12.2 Ghz and the transmit range is probably 14.0 to 14.5 Mhz. I
think the receive IF range is the standard 950-1450 Mhz range but Hughes
used a proprietory transmit IF. Voltage was supplied on the IFL cable using
bias T's internal to the "InDoorUnit". It was also customary to inject the
10 MHz PLL reference on the TX and sometimes RX IFL cable(s). The unit on
eBay is the second generation "OutDoorUnit" manufactured by NEC of Japan for
Hughes. The pointing output supplied a DC voltage proportional to signal
strength. This unit will require allot of surgery to be useful 10 Ghz.
...de Howie AB2S