K7BDY -
Martin
Oro Valley, AZ
Back to Tucson AM Page
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The AM
Voice of K7BDY from Oro Valley/Tucson - the well-maintained BC-610I. |
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The AM
operating position - essential functionality on a desktop: Kenwood R-599
Receiver, Speech Amp for BC-610, Heath VFO for clean stability and Heath
Wattmeter. Microphone is an unamplified D-104. |
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Martin,
K7BDY, at the AM operating position. Shack is spacious add-on at
the rear of the house. |
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The SSB position contains
vintage transceivers (Swan 700cx, Kenwood TS-530s), Heath SB-1000
and HL-2200 Linear Amplifiers, and a Heath Mohican general-coverage
receiver. (Click here for larger photo ~100K) {Click here for LARGEST photo ~1Meg}
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SSB operation is
supplemented with a Yaesu FT901 transceiver and a Henry 2K-4 Amplifier. (Click here for larger photo ~100K)
{Click
here for LARGEST photo ~1Meg}
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A key part of the K7BDY
160-meter system is this 70-foot, series-fed vertical monopole with
capacitive tophat and top-end loading coil. (Click here for larger photo ~100K)
{Click
here for LARGEST photo ~1Meg}
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A remotely controlled,
motor-driven variable inductor at the base of the vertical allows precise
matching over the entire band. It is housed in the larger, gray
weatherproof box. (Click here for larger photo ~100K)
{Click
here for LARGEST photo ~1Meg}
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The "secret
sauce" in the 160-meter stew: a surplus variable inductor of unique
design for antenna matching. It winds or unwinds a flexible
silver-plated strap around a ceramic form as driven by the reversible DC
motor and gear train. (Click here for larger photo ~100K)
{Click
here for LARGEST photo ~1Meg}
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Antenna requirements for
higher bands are fulfilled by a multiband 3-element beam and wire dipole
atop a 60-foot tower. (Click here for larger photo ~100K)
{Click
here for LARGEST photo ~1Meg}
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