The 50 MHz band is right on the boundary between HF and VHF.
Now it can't be allocated as a Downlink since it isn't allocated to the Amateur Satellite Service but what about an Uplink in that band ? It would operate in a similar manner to OSCAR-7 Mode B which has a receiver outside the ITU allocated Amateur Satellite segment.
A 50 to 29 MHz transponder would be good.
ITU WRC-19 will have an Agenda Item for a global Primary Amateur Allocation at 50 MHz. Unfortunately that is for Terrestrial only not Satellite but arguably that wouldn't prevent an uplink receiver being flown.
Clearly worth lobbying ARRL and IARU to work towards getting a Satellite Downlink allocation at 50 MHz for future sats.
73 Trevor M5AKA
I bought a MOT spectra 20w 900-MHz FM rig for about $50 on
e-bay. The seller programmed it for my desired ham frequencies
(about 8 channels) for free. Mainly use 927.5 MHz simplex.
If you want to operate CW/SSB on 902 or 903 MHz call DEMI with credit
card in hand.
What is hard is to find very many station on these bands.
I have my 900 station driving a MOT amp outputting 60w to 18-element
loop-yagi (google Directive Systems).
So the hardest part of mw is convincing anyone to move up here.
I am QRV from 500-KHz to 10-GHz.
hint - using a solder iron helps
73, Ed - KL7uW
Date: Thu, 26 May 2016 16:43:45 -0500
From: Peter Laws <plaws0(a)gmail.com>
To: AMSAT-BB <amsat-bb(a)amsat.org>
Subject: Re: [amsat-bb] HF Satellite Transponder
Getting above 1 GHz isn't easy. Actually, 900 isn't that easy,
either. In fact, I'm looking for a clean IC910H with the L-band
module so I can do just as you suggest. :-)
73, Ed - KL7UW
"Kits made by KL7UW"
Dubus Mag business:
This came from a local group. The 1271 may of particular interest.
73 Bob W7LRD
----- Forwarded Message -----
From: "Jeffrey Benedict" <raoul(a)olympus.net>
To: "darin arrick" <darin.arrick(a)gmail.com>
Cc: "pnwvhfs" <pnwvhfs(a)googlegroups.com>
Sent: Thursday, May 26, 2016 9:41:03 PM
Subject: Re: [PNWVHFS] Re: For Sale: Icom VHF and UHF all-mode rigs, IC-271A, IC-471H, IC-1271A, misc
What kind of price are you looking for each of these? It’s nice to know where to start with an offer.
> On May 26, 2016, at 9:15 PM, Darin Arrick <darin.arrick(a)gmail.com> wrote:
> I should have also added that the 271A and 1271A both have 110V internal power supplies; that's how they are both powered right now. The 471H takes an external 12VDC supply (I have a couple of Astron RS-20 power supplies I could sell, as well).
> On Thursday, May 26, 2016 at 4:54:21 PM UTC-7, Darin Arrick wrote:
> I'm between jobs at the moment and I may need to drum up some funds. So some of my radios may have to go. All are in clean, working condition unless otherwise specified. All are currently connected to an antenna and can be demoed or we can set up a QSO. I've talked with a few of you using these rigs already. :) These are older radios (mid-'80s), but are well-known for being very good rigs.
> 1) IC-271A - 2m all-mode. All functions work fine. I've made SSB, FM, and digital contacts with this rig. So far as I can tell, it has no problems. It does have its original RAM board, and the battery voltage tested fine; I'd suggest replacing it as a matter of course, though, whenever you get around to it.
> 2) IC-471H - 440 all-mode. Everything works fine, with two exceptions. First, it seems to put out half power (about 35W); maybe one of the two final transistors is blown. Two, I think it has a loose wire going to the internal speaker; headphones work perfectly (looking at the schematic, I can see which connection may be loose, but I've not tried to fix it yet). I've upgraded this unit with a new RAM board (cost: $60).
> 3) IC-1271A - 1.2GHz all-mode. I don't have an antenna up for 23cm, but I've used my 440 horizontal loop for low-power testing. I was able to have a QSO on a local repeater with no problems. I do not have an SWR/power meter for this band, either, so I can't verify output. It seems to work fine based on the little use I've given it.
Jeffrey Benedict - raoul(a)olympus.net -
Port Ludlow, WA USA
1976 R90/6 — 1977 Yamadog XS650 — KB7AIL
~The Voice of the Pacific NorthWest VHF Society~
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Thursday, May 26, gridsquare EL58 will be activated on satellites
SO-50 and FO-29 with the 1x1 callsign K5L. This will be a /MM
operation launched from Venice, Louisiana.
The satellite pass schedule is online: http://www.qrz.com/db/k5l
I may have a launch opportunity for an HF=HF transponder for a possible
cubesat idea. Probably something like 12m up and 10m down?
Is this worth doing (re-doing) at this point of technology? Enough
bandwidth to support a few voice channels?
Any volunteers to build the translator board?
How is 24 MHz band used? The entire SSB portion of the band is only 60
kHz, so using say 15 kHz for a linear translator to 10m would be quite a
slice. But then the downlink at 10m would be OK since it does have an
exclusive satellite band and so any inadvertent QSO's would be coming down
in a non-competing downlink
Just some open ended thinking after Dayton.
Mode A for me WB4LHD
Sent from my Sprint Samsung Galaxy S® 6.-------- Original message --------From: Paul Stoetzer <n8hm(a)arrl.net> Date: 5/26/2016 1:35 PM (GMT-06:00) To: Joe <nss(a)mwt.net> Cc: amsat-bb(a)amsat.org Subject: Re: [amsat-bb] HF Satellite Transponder
Yes, the Amateur Satellite Service has allocations in 40m (7.000 - 7.100
only), 20m (14.000 - 14.250 only), 17m, 15m, 12m, and 10m (entire band for
the last four).
On Thu, May 26, 2016 at 2:21 PM, Joe <nss(a)mwt.net> wrote:
> is sat operations even legal on that band? 12M?
> The old Russian 15 & 10 meters were cool,
> I'd like to see a good old mode "A" myself. It has to be the easiest (
> except for the FM Channel repeater on a very tall tower equivalent birds)
> Extreme simple gear can get you on Mode "A"
> Ive done it with a dipole on 10 and a coathanger GP on 2 and the 2
> transmitter was a FM rig with the mic disconnected and a straight key on
> the PTT. it was a little chirpy but hey worked like 30 states with that
> simple thing.
> Joe WB9SBD
> The Original Rolling Ball Clock
> Idle Tyme
> On 5/26/2016 12:45 PM, Robert Bruninga wrote:
>> I may have a launch opportunity for an HF=HF transponder for a possible
>> cubesat idea. Probably something like 12m up and 10m down?
>> Is this worth doing (re-doing) at this point of technology? Enough
>> bandwidth to support a few voice channels?
>> Any volunteers to build the translator board?
>> How is 24 MHz band used? The entire SSB portion of the band is only 60
>> kHz, so using say 15 kHz for a linear translator to 10m would be quite a
>> slice. But then the downlink at 10m would be OK since it does have an
>> exclusive satellite band and so any inadvertent QSO's would be coming down
>> in a non-competing downlink
>> Just some open ended thinking after Dayton.
>> Bob, WB4aPR
>> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views of
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> are solely those of the author, and do not reflect the official views of
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Am relaying the latest developments on the CNCTRK system hardware.
Arduino Interface for CNCTRK/RAZEL Positioner Developed For Use With SATPC32
An Arduino SKETCH has been developed to allow interfacing the RAZEL
any tracking software using the Yaesu GS-232 protocol. This enables the
stepper motor based positioner to be used from SATPC32, GPredict, and
*without using the CNC-based system* on the Raspberry Pi or laptop. The
has only been tested with SatPC32, so far.
Arduino connections (pinouts) and detailed descriptions can be found here:
The Arduino Sketch is found here:
Thanks to Tom, W9KE, for a nice start on the GS-232 interface code, though
any errors are all mine!
Comments, corrections, and feedback are welcomed.