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Single-ended class D ka1tdq 5 241 Last post February 02, 2019, 03:20:57 PM
by M0VRF
Step up 3 dB WA4WAX 0 247 Last post December 30, 2018, 03:04:53 PM
by WA4WAX
Valiant VFO - C18 wa2fxm 1 254 Last post November 27, 2018, 06:23:04 PM
by DMOD
VR Tester WA4WAX 0 256 Last post September 10, 2018, 02:31:59 PM
by WA4WAX
very old tube type 12A data wanted. Opcom 8 257 Last post February 04, 2019, 03:56:23 PM
by Joe Connor
Kenyon transformer and choke info needed. W8KHZ 4 274 Last post January 31, 2019, 09:46:44 PM
by Opcom
The 6973 vacuum tube replacement Opcom 2 276 Last post December 18, 2018, 12:45:14 AM
by Opcom
Hallicrafters HT-44 Modifications W1KSZ 2 284 Last post December 24, 2018, 04:50:00 PM
by W1KSZ
ICOM 7610 K1ETP 1 286 Last post December 04, 2018, 12:16:42 PM
by KC2TAU
R-390A Carrier Level Meter reading? WBear2GCR 3 287 Last post January 04, 2019, 09:18:58 AM
by WBear2GCR
3-500Z's-SOLVED w3khg 4 292 Last post January 07, 2019, 07:57:37 PM
by KD6VXI
Ceramic pF Trimmers & R-390 WBear2GCR 7 304 Last post February 11, 2019, 11:48:19 PM
by WD8KDG
Henry 3-phase amp schematic needed W7TFO 3 318 Last post December 20, 2018, 03:11:30 AM
by ka1tdq
SX-117 Revision Identification W1KSZ 3 320 Last post December 08, 2018, 12:07:10 AM
by W1KSZ
Marconi 2945 Spectrum Analyzer Problem WA2SQQ 1 321 Last post November 09, 2018, 03:56:05 PM
by WA2SQQ
Gate Coupling (x-post) g7klj 0 326 Last post June 01, 2018, 02:55:26 AM
by g7klj
Question about ferrite core material and common mode RF Reduction. WA2SQQ 8 334 Last post January 30, 2019, 09:15:02 PM
by KK4YY
TACO ALL WAVE FILTER wb1ead 3 337 Last post January 16, 2019, 08:13:33 PM
by kb2vxa
Plate/Screen Modulation of Beam Power Tubes - Usual Suspects vs Sweep Tubes KK4YY 2 345 Last post November 23, 2018, 07:32:52 PM
by KK4YY
2 tube shortwave superhet with EF97 fed by 12 VDC PA0NVD 4 346 Last post November 11, 2018, 04:32:43 PM
by K1JJ
Audio observations ki4nr 8 349 Last post February 15, 2019, 10:00:00 AM
by KL7OF
Ranger II Panel Cleaner Info Needed W1KSZ 3 354 Last post November 02, 2018, 08:39:32 PM
by KD1SH
2 tube oscillator and buffer circuit W4RFM 4 357 Last post January 11, 2019, 11:09:11 AM
by W9ZSL
M.C. Jones 632 Dummy Load WA2SQQ 2 360 Last post November 05, 2018, 09:52:04 AM
by WA2SQQ
What's it from? Millen dial/control head/face plate. VFO? W1BCC 2 364 Last post October 14, 2018, 07:10:32 PM
by KA2DZT
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