Conrad,
I have started work (occasional, and on a not-to-interfere-with-XYL's-plans
basis) on a 6 meter module for the Sierra. I think it will work, although
I don't have any hard numbers yet. Fortunately, the 15-meter band module
premix crystal (29Mhz) can be used for six meters simply by taking the
second harmonic (58Mhz). This is exactly the right premix injection
frequency for 50MHz on the Sierra (left to the reader as an excersize :)
The catch is that the NE602 used as the premixer wants to use the third
harmonic of the crystal when you include a trap for the fundamental (see
NE602 data sheet). So to get to the second harmonic I'll probably have to
put a few extra parts on the band module, i.e. a separate 2nd-harmonic
oscillator circuit. I may even re-design the module someday to accomodate
six meters, including an LNA on-board.
Probably the area it will be most lacking in is power output -- I'd be
happy to get 1 watt on 50MHz with the current transmit strip! Still, it's
a fun challenge. (After all, it was only two years ago that the Sierra
didn't work on 12 and 10 meters very well, and with that under my belt I'm
ready for a serious challenge. :)
Another way to go is to build a transverter, and I may do that instead,
using the 20m module as an I.F. This has the advantage of allowing for a
low-noise amplifier--a necessity on six meters.
I'm not going to finish this anytime soon, so if someone else beats me to
it, let me know!
7.3,
Wayne
N6KR
* * *
Conard Murray (ws4s@InfoAve.Net) wrote:
Hi,
Has anyone tried to put the Sierra on 6M? I am totally unfamiliar with the
innards of the Sierra, so it may be impossible to get it that high with any
stability.
I am window shopping right now for a kit rig and have just about settled on
the Sierra. Some of the best qrp contacts I have ever had were on 6M ...
like TN to W6 with no-movement-on-the-meter power levels.
Thanks and 72,
de Conard WS4S
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