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Swapping 4-250 for 4-400 tubes kc2wts 3 327 Last post November 15, 2017, 01:30:01 PM
by WD8KDG
Hallicrafters HT-20 kc2dhu 13 773 Last post November 14, 2017, 07:16:27 PM
by w3jn
32V-3 Audio Mod wa2fxm 4 370 Last post November 13, 2017, 03:30:19 PM
by Steve - K4HX
Globe King 275 /275A N8ZRD 8 579 Last post November 13, 2017, 06:55:33 AM
by N8ZRD
Alpha 76a KB5MD 0 144 Last post November 12, 2017, 10:20:48 PM
by KB5MD
Circuit Girl Builds Magnetic Loop WA4WAX 5 687 Last post November 12, 2017, 08:53:17 PM
by Opcom
Torroid inductor design software? WA2SQQ 2 216 Last post November 09, 2017, 06:25:23 AM
by WBear2GCR
r-390a limiter problems w5rjh 1 168 Last post November 06, 2017, 11:36:04 PM
by WD8KDG
Suggestions for modulator/method for 813 Rig KU8L 5 474 Last post November 04, 2017, 11:47:36 PM
by Opcom
Hallicrafters HT-9 Information needed K8JLY 1 156 Last post November 04, 2017, 10:31:19 PM
by Opcom
input matching to grounded grid amplifier Opcom 22 1511 Last post November 04, 2017, 05:29:25 PM
by Opcom
32V-2 no grid current - how to troubleshoot KJ4OLL 18 1337 Last post November 04, 2017, 01:00:11 AM
by WB6NVH
New project - Viking Ranger KJ4OLL 13 760 Last post November 03, 2017, 09:29:48 AM
by KD6VXI
Amplifer Classes for AM kd6cub 16 1101 Last post November 01, 2017, 06:47:42 PM
by K1JJ
Abbott Instrument TR-4B W9GT 7 437 Last post October 31, 2017, 04:54:50 PM
by W9GT
looking for matching paint for a Johnson desk KW ac7xh 2 177 Last post October 30, 2017, 05:26:05 PM
by KB5MD
Audio Transformers Die? R-390 / R-390A WBear2GCR 2 301 Last post October 30, 2017, 02:59:17 PM
by WBear2GCR
Window Line, Clearances?? W6TOM 2 261 Last post October 29, 2017, 02:07:48 PM
by kb4qaa
General Transformer Corp 8K234 kd1nw 2 168 Last post October 29, 2017, 11:03:08 AM
by kd1nw
Hubbell Old Style Connectors, Source?? W6TOM 6 402 Last post October 25, 2017, 01:20:59 PM
by K4NYW
RFI in SSR's W9BHI 8 422 Last post October 24, 2017, 03:49:58 PM
by W9BHI
Using Ceramic / Crystal Mics on New Radios WA2SQQ 15 933 Last post October 21, 2017, 07:57:01 PM
by WD4DMZ
RME-69 power transformer no3m 2 279 Last post October 20, 2017, 03:53:17 PM
by no3m
Chokes for RF Supression WA2SQQ 6 428 Last post October 20, 2017, 10:36:12 AM
by WD8BIL
How the Japanese cretaed transistors WA2SQQ 13 1027 Last post October 15, 2017, 12:33:17 PM
by WD5JKO
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