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 ======================================