Many years ago, when computers filled buildings, consumed a megawatt or
two, and the IBM CEO forecast a world-wide market for them of maybe six,
ten tops ... automatic antenna matching, particularly in HF mobile
environments, was sometimes achieved by sampling the voltage and current
at the feed point and driving a motor on the matching unit's capacitor
shaft to make the phase difference zero [i.e. resonance]. Should be
able to do that with a mag loop today in a much smaller package.
I do wish Alex had put a 10:1 drive on the capacitor shaft however.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 1/23/2017 11:16 AM, kevino z wrote:
I just wish Alex would release the motor to control the tuning...
-Kevin (KK4YEL)
-----
The problem with the world is that the intelligent people are full of
doubts, while the stupid ones are full of confidence.
On Jan 23, 2017, at 14:13, Fred Jensen <k6...@foothill.net
<mailto:k6...@foothill.net>> wrote:
Good to know. I've never tried my Alexloop inside the house, but for
an all-round portable antenna it meets the requirements of size, ease
of set-up/take-down, and working well at QRP-ish power levels. The
tuning problem is mitigated by the fact that I usually sit directly
under it when it's mounted on the tripod and I can just reach up and
adjust it.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 1/23/2017 5:21 AM, Doug Turnbull wrote:
Fred,
Well put and useful. I can though testify that the AlexLoop
can work
amazingly well from inside a frame house and even a stone house as I
have
tried this.
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