NA7RH
-
Bob
Scottsdale,
AZ
Back to
Phoenix AM Page
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The
very neat and compact
NA7RH vintage shack. |
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Bob
at the operating position
and live on 3870. Xmtr is a single 6DQ5, modulated by four
1625's in P-P/parallel, both homebrewed from 1950's-era ARRL Handbook
designs (see below). Rec is a Knight R55 circa
1961. Funky Eico scope monitors mod levels. SSB rig
is an Icom 735. |
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The
6DQ5 Transmitter was
originally built as a novice rig by Bob in 1962 upon being licensed as
WN5FNJ in El Paso, Texas. See PDF write-up below for the
complete story. |
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The
back view of the 6DQ5
xmtr shows the band-switching plate tank circuitry and
scrounged power supply components. |
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The
bottom view of the
transmitter showing circuitry installed by 15-year-old WN5FNJ and
preserved as an artifact of youthful inexperience. |
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 Circuit details and
complete history of this 40+year-old transmitter that holds its own on
the 80- and 40-meter AM nets. (~1Meg) |
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Schematic
diagram of 6DQ5
xmtr - click picture for full page. See below for complete
Handbook article in PDF format. |
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| Complete ARRL Handbook article
on 6DQ5 Transmitter in PDF format. (~925KB) |
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The
Push-Pull/Parallel 1625
modulator, rear view. Power supply sold separately. |
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Top
View of modulator. |
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Bottom
view of modulator
showing classic, neat-as-a-pin, component layout and point-to-point
wiring. |
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Schematic
diagram of
push-pull/parallel 1625 modulator - click picture for full
page. See below for complete Handbook article in PDF format. |
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| Complete ARRL Handbook article
on Push-Pull/Parallel 1625 Modulator in PDF format. (~760KB)
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| Bob describes his career as VQ9RH to David, W6PSS | ||
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