Further to and the other approach:
Arnie at [email protected] is selling Magellan active GPS
antennas at $8 and postage was I think $7-70.
Has about 12ft of coax and BNC which I extended by another 12ft
with RG58. Works fine with the HP Z3801a. This only tracks six
satallites but "what a machine" for those who do not want to
built or prefer to "swing the bucks" in the words of Jay, W1VD.
The Z3816a I think is the 8 satellite version but I have only
seen three of those so far and they were expensive. Extensive
information on www.realhamradio.com
I have built a frequency reference using a Racal Dana 5MHz
ovened oscillator and now watch this and the 10MHz output
from the HP on 0.1uS/cm on the scope. The HP has been running
two weeks and now predicts remaining within 2.4uS during the
initial 24 hours of losing GPS lock.
73, Brian
At 08:23 19/10/2002 +0100, you wrote:
Further to Andy, G4JNT's talk at the LF Forum (RSGB HF COnvention) last
weekend, and his article in RadCom, Frank, K0BRA, mentioned a cheap source
of surplus Motorola ACS1397 8 Channel GPS modules from BG Micros
(http://www.bgmicro.com).
Anyone wanting to build a GPS locked frequency source may be interested to
know that the modules are advertised at $US14.95 and arrived here in the UK
three days after ordering over the Internet. The only snag now is to get an
active aerial, or some work-around - presumably a circularly polarised
aerial with a MAT device - and an OSX connector. Grateful for helpful
suggestions on the latter.
73 John, G3WKL
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