Well, I guess I should have been a bit more accurate. Is 1296mhz going to be used in any future satellites or will it be 1268MHZ. The reason for asking is I have the opportunity to purchase a DEMI 1296-144 transverter.
P.S. I need an answer soon please:-)
Thanks, RoD KD0XX
A good friend will come and bail you out of jail, A TRUE friend will be sitting next to you saying.....
"DAMN THAT WAS FUN"
1260-1270 MHz is the satellite segment by international treaty and can only be used for uplinks. 1268-1270 MHz was used in the past but the lower end (1260-1264 MHz) may receive more use as there is a null in the European GPS downlink signal in that range.
73,
John KD6OZH
----- Original Message ----- From: "Stargate" stargatesg1@verizon.net To: "Amsat-Bb" amsat-bb@amsat.org Sent: Sunday, March 11, 2007 20:35 UTC Subject: [amsat-bb] 1.2ghz useful
Well, I guess I should have been a bit more accurate. Is 1296mhz going to be used in any future satellites or will it be 1268MHZ. The reason for asking is I have the opportunity to purchase a DEMI 1296-144 transverter.
P.S. I need an answer soon please:-)
Thanks, RoD KD0XX
A good friend will come and bail you out of jail, A TRUE friend will be sitting next to you saying.....
"DAMN THAT WAS FUN"
Sent via AMSAT-BB@amsat.org. 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
At 07:35 AM 3/12/2007, Stargate wrote:
Well, I guess I should have been a bit more accurate. Is 1296mhz going to be used in any future satellites or will it be 1268MHZ. The reason for asking is I have the opportunity to purchase a DEMI 1296-144 transverter.
P.S. I need an answer soon please:-)
1296 is terrestrial, 1260-1270 is the satellite band. You can always tweak the transverter with a new crystal and retuning.
73 de VK3JED http://vkradio.com
Rod,
The frequency allocations are different, so ground to space will be down in the 1268-1270 MHz range. I have a unit, not DEM, which works fine in that range, with a new LO xtal and a little tweaking of coils and caps. You would be best, unless someone here knows for certain, to call DEM and ask them. They are very knowledgeable, and this question must have come up in the past.
Alan WA4SCA
At 02:54 PM 3/11/2007, Alan P. Biddle wrote:
Rod,
The frequency allocations are different, so ground to space will be down in the 1268-1270 MHz range. I have a unit, not DEM, which works fine in that range, with a new LO xtal and a little tweaking of coils and caps. You would be best, unless someone here knows for certain, to call DEM and ask them. They are very knowledgeable, and this question must have come up in the past.
Alan WA4SCA
Alan,
I asked Steve at DEMI this question about the time AO-40 was up. He said that the 1296 xvtr is not easily moved down in frequency (dissuading one from this). The board uses stripline filters and not coils except at the LO. I would guess one would need test equipment for these frequencies to perform the surgery. At the time DEMI had an 18w 144/1268 up converting Tx unit (I bought S/N 002), but DEMI discontinued this after AO-40's demise (understandably).
I do not know if they intend to bring a satellite converter back in production. DB6NT (Kuhne Engineering) currently offers one, but at a price.
73, Ed - KL7UW ====================================== BP40IQ 50-MHz - 10-GHz www.kl7uw.com 144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w DUBUS Magazine USA Rep dubususa@hotmail.com ======================================
participants (5)
-
Alan P. Biddle -
Edward Cole -
John B. Stephensen -
Stargate -
Tony Langdon