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National NC-300 Field Service notes K5UJ 0 6695 Last post July 02, 2012, 05:25:26 PM
by K5UJ
Treasure Trove of WW-II MIL Radio Schematics and Conversion Data W1RC 0 16138 Last post March 06, 2014, 08:57:56 AM
by W1RC
T-368 PARTS MANUAL k5ygc 0 4242 Last post November 03, 2014, 12:59:41 PM
by k5ygc
Hp app note 37, measuring AM with a scope John K5PRO 0 4430 Last post March 31, 2017, 08:05:11 PM
by John K5PRO
National XR-50 Coil Data kc2we 0 4689 Last post April 27, 2017, 07:40:50 AM
by kc2we
potter&brumfield relay specs (21 files), oscilloscope manuals (4) posted Opcom 0 12950 Last post May 27, 2017, 12:46:35 AM
by Opcom
bunch of books on scopes and some small test gear you can make. Opcom 0 7206 Last post January 10, 2019, 04:33:21 PM
by Opcom
Thordarson Driver Transformer Wiring Sheet kc2we 0 13174 Last post June 08, 2020, 09:54:35 PM
by kc2we
Stancor TP-2 TP-3 TP-4 Transformer Wiring kc2we 0 2126 Last post July 23, 2021, 08:46:01 PM
by kc2we
"Applications of Visual-Indicator Type Tubes" 15 pages on the 'new' Eye Tube Opcom 0 1994 Last post July 28, 2021, 11:07:08 PM
by Opcom
TCS Receiver Noise Blanker Mod Info kc2we 0 1906 Last post September 24, 2021, 06:27:20 PM
by kc2we
Thordarson interstage transformer data sheet update to catalog 400's Opcom 0 2415 Last post April 25, 2022, 01:13:04 PM
by Opcom
LM Navy Frequency Meter 12 to 6 volt filament mod info from 1946 kc2we 0 4132 Last post May 02, 2022, 07:34:32 PM
by kc2we
many data sheets for Meissner, Miller, etc. Opcom 0 1574 Last post July 10, 2022, 11:12:21 PM
by Opcom
Online HP/Agilent manuals, app guides, etc w3jn 0 7491 Last post March 25, 2016, 08:52:58 PM
by w3jn
Huge collection of online databooks - semis, tubes, app guides, etc w3jn 0 4545 Last post March 25, 2016, 06:35:52 PM
by w3jn
Repair of early shortwave receivers WA2SQQ 0 13957 Last post January 25, 2016, 02:30:45 PM
by WA2SQQ
American Radio History web site WA2SQQ 0 3733 Last post January 07, 2015, 08:31:29 AM
by WA2SQQ
Quiet turn-on of carbon microphones Opcom 0 31861 Last post February 18, 2015, 12:54:28 AM
by Opcom
easy-to-build Ham Radio Projects Opcom 0 5868 Last post February 02, 2015, 06:59:03 PM
by Opcom
Review: SHORTWAVE RECEIVERS PAST AND PRESENT, Fourth Edition by Fred Osterman, W1RC 0 8228 Last post February 04, 2015, 07:10:34 AM
by W1RC
Field Antenna Handbook Opcom 0 5557 Last post February 10, 2015, 12:24:45 PM
by Opcom
NAVSHIPS 900,109 Navy Type Number Book - September 1945 online Opcom 0 5042 Last post July 30, 2015, 06:19:42 PM
by Opcom
Heathkit & other manusl WA2SQQ 0 6305 Last post October 16, 2015, 10:52:23 AM
by WA2SQQ
The Little Pistol's Guide to HF Propagation Steve - K4HX 0 4629 Last post December 10, 2015, 10:01:39 PM
by Steve - K4HX
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