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73 Amateur Radio - Free and Open Source Software
73 Amateur Radio - Free and Open Source Software
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and gels about + 5 dBm output on<br />
transmit (approxima tely 3 mW<br />
power). The S-meter indicated full<br />
peg on both SSB and FM.<br />
Leon WASBNH was using his<br />
system which places the mixer directly<br />
on Ihe antenna without a<br />
preamp. His output power (transmit)<br />
is about 100 ~W.<br />
leon was<br />
able to make contact with Phil<br />
W6HCC on Heaps Peak who was<br />
still full peg on WA5BNH 's rig.<br />
W6HCC decided 10 redu ce his<br />
power to about 100mW, and leon<br />
WA5BNH saw the S-meter come<br />
just off the peg. Further reducing<br />
W6HCC's power to 20 mW gave<br />
WA5BNH 's s-meter an 8-7. The<br />
copy at Heaps was j ust above<br />
marginal during Ihe test, using<br />
5 kHz FM for the contact on 2 meter<br />
HTs.<br />
Kerry decided to try another<br />
test. He replaced the 2 meter FM<br />
transceiver wilh a Santec lS-202<br />
multimode 2 meter HT capable<br />
of FM and SSB with the same<br />
transmitter power. He switched<br />
the mode 10 SSB on both ends<br />
of the path. The resulting copy<br />
went to full Q-5 copy on SSB<br />
at Phil W6HCC's location. Going<br />
back 10 FM again led to marginal<br />
copy. JI's often very handy 10<br />
be able to switch to SSB from FM<br />
Figure 2. KAIZIL '5 10GHzunit. With 5 V to ground, the d6tector diod6 gives about J rnA DC.<br />
to improve copy on a long path.<br />
Eq uipment Detail<br />
A brief outline of the equipment<br />
is in order so that you can see just<br />
what is pieced together. The parts<br />
are not all identical, and they depend<br />
on what is available through<br />
scrounging or swap meets. The<br />
heart of the unit is the phaselocked<br />
oscillator that provides<br />
about + 10 to + 20 dBm output on<br />
10 GHz. The units that we have<br />
been able to obtain have come<br />
from many different sources. The<br />
prime source seems to be the surplus<br />
disposal section at Collins<br />
Microwave in Richardson, Texas.<br />
They hold monthly auctions 10 dispose<br />
of out-o f-spec equipment,<br />
and the hams in that area pick up<br />
the material and make it available<br />
through newsrettere and swap<br />
fests.<br />
The phase-locked oscillator is<br />
basically a high power microwave<br />
oscillator run ning in the 1.2 to<br />
2 GHz range, depending on<br />
Ihe model. You tune it with a varactor<br />
controlled by a 97 to 100<br />
MHz crystal reference. Some<br />
crystal oscillators are internal and<br />
some are external. The internal<br />
types usually demand a higher<br />
price, about $35 to $50 dollars<br />
each , depending on condition.<br />
The less desirable units run about<br />
5 to 10 dollars less. In future<br />
_ '"<br />
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