homebrew hf rig
 

Has anyone got a design for a 10M ssb/cw transceiver for use with a 432MHz
transverter for a dedicated eme rig....

--
73's de Paul M0EME
www.qsl.net/m0eme
4 times FO20 432MHz
FT847
100W
Spectran

"Paul" wrote in message
...
Has anyone got a design for a 10M ssb/cw transceiver for use with a 432MHz
transverter for a dedicated eme rig....

--
73's de Paul M0EME

http://uk.groups.yahoo.com/group/pic...guid=166674674

W4ZCB

On Sun, 20 Feb 2005 19:28:58 -0000, "Paul"
wrote:

Has anyone got a design for a 10M ssb/cw transceiver for use with a 432MHz
transverter for a dedicated eme rig....

What modes are you planning to use ? CW only or some other digital
modes intended for EME ? Is the 432.000 - 432.025 MHz tuning range
enough ? Which end of the link is responsible for compensating for the
lunar doppler in each particular mode ?

If you are only operating at a very narrow segment, a VCXO could be
enough and get away with the synthesiser noise. A 12.9 MHz VCXO
followed by a tripler would generate the 38,7 MHz, which could be used
to mix down to 10.7 MHz IF. The required crystal pulling range for 25
kHz wide reception range would be about 650 ppm.

The doppler requirement may require that you must be able to operate
split, so two VCXOs would be needed.

Paul OH3LWR