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Transformer rewinding
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W7TFO
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2
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2055
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August 10, 2011, 02:54:45 PM
by W7TFO
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Receive random longwire question
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W7TFO
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16
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8495
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May 07, 2013, 11:38:35 PM
by KL7OF
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A homebrew bench test unit-Variac-isolation box
« 1 2 »
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W7TFO
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25
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14001
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July 13, 2016, 01:52:53 AM
by N0WEK
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Simple AM mod monitor from '47 Sylvania News
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W7TFO
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6
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5309
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August 11, 2011, 06:14:06 AM
by kg8lb
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The little Variac that could....
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W7TFO
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4
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2423
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February 28, 2012, 01:42:12 AM
by W7TFO
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1935 RCA 100F Ultra-Shortwave AM transmitter
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W7TFO
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16
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9335
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August 28, 2023, 12:31:09 PM
by W7TFO
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A buzzardly sweet loading cap
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W7TFO
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1
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1939
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October 16, 2011, 12:43:06 PM
by ke7trp
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And now for something completely different...
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W7TFO
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9
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4206
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September 24, 2011, 09:43:49 PM
by Bill, KD0HG
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Free glass crystal
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W7TFO
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7
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2954
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July 19, 2011, 10:48:06 PM
by W7TFO
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New grey wrinkle on new regen build
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W7TFO
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11
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7209
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September 05, 2014, 09:42:37 PM
by WU2D
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My Hints & Kinks column..
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W7TFO
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2
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372
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April 12, 2024, 10:16:10 AM
by W7TFO
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A US-made two-needle wattmeter
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W7TFO
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4
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2909
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October 06, 2012, 07:36:32 AM
by w3jn
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Anyone with either a SP-10 or SP-100 Hammarlund.
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W7TFO
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9
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3841
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June 13, 2011, 02:20:27 PM
by W7TFO
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I just saw the damndest thing...
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W7TFO
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7
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4113
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December 10, 2009, 08:27:13 PM
by KC2IFR
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1930's RCA 10-Meter TX
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W7TFO
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2
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2488
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October 14, 2012, 06:24:13 PM
by W7TFO
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My first ham TX, a retro endeavor
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W7TFO
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8
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7838
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December 31, 2009, 02:21:06 PM
by W7TFO
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Russki GM-70 tube
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W7TFO
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3
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3086
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September 17, 2011, 09:14:31 PM
by k4kyv
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unbreakable transistor for high-power AM
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W7TFO
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12
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6560
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July 28, 2011, 01:22:00 AM
by steve_qix
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1952 LaPort/RCA Radio Antenna Engineering book
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W7TFO
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8
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5803
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July 10, 2011, 09:24:39 PM
by W0BTU
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Hickock tube tester
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W7TFO
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4
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2450
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April 03, 2014, 02:43:26 AM
by WB6NVH
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Henry 3-phase amp schematic needed
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W7TFO
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3
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1805
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December 20, 2018, 03:11:30 AM
by ka1tdq
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Data sheet needed
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W7TFO
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2
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1880
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September 13, 2009, 08:16:39 PM
by KM1H
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Primary voltage regulators for boatanchor life
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W7TFO
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7
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4238
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March 15, 2011, 11:37:13 PM
by Opcom
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One reason for so much noise on HF...
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W7TFO
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0
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2157
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April 24, 2012, 01:39:08 AM
by W7TFO
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Triode life question
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W7TFO
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7
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4274
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March 31, 2011, 04:52:42 PM
by W9GT
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