View Full Version : Radio Circuits, Repair & Performance

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  1. RS-232 versus TTL Serial Communications - SHORT TUTORIAL
  2. FT101ZD
  3. HR-2510 bezel, frequency button mods?
  4. Yaesu FT 101EE no rx
  5. Handheld radio batteries exhausted due to non-usage, any chances to recover?
  6. Need help repairing TS-830 notch filter
  7. Yaesu FT-7100 not powering up
  8. Ts-430S PA repair... If I can do it, so can you!!!!!
  9. help needed sheldon hands electronic kit valve amp psu
  10. Yaesu FT-736R Will Not Transmit 220 Mhz
  11. Kenwood TW4000A Poor receive (at least on VHF)
  12. Yaesu CD-15A drop-in charger
  13. parts order from Icom Canada
  14. Yeasu FT-301 repair
  15. 60 Meter mod for the TS-570D?
  16. Icom 706 MK11G power relay
  17. I am looking amateur in Canada for parts order
  18. Motorola gr300 repeater
  19. 60 Meter Mod. for Yaesu FT-857D?
  20. Kenwood TS2000X Inrad filter
  22. VHF inline wattmeter--YS-500 question..
  23. Mouser Parts Shipping Experience
  24. TEN TEC OMNI-V Final AMP MRF458 -> 2SC2879 works OK.
  25. Need some help with a FT-736R
  26. TM-V7A
  27. need source for Bussmann BS1362 250V 1A HBC 6KA fuse
  28. Collins 30L-1 with two 572B tubes?
  29. ICOM 229H shorted
  30. Kenwood TM-742A with "Rushing" Sound on Transmit and Receive
  31. Yaesu 757 GX II CW "STUCK"
  32. ADI ARC 12 Fast Charger
  33. My first HF rig - Icom IC-735
  34. Yaesu FT-450D MARS Mod
  35. Leaky Ni-Cd battery corrosion prevention opinions wanted
  36. ICOM IC-2100h restore original transmit frequencies - replace d16
  37. icom 765 tuner
  38. HAGENUK AT1001 antenna tuner BDG/ATU controller
  39. ICOM IC-7000 noisy at 7.300 and down
  40. TS-940s Low Output
  41. Vacuum tubes - I need direction
  42. Beckman LM22A LCR Schematic
  43. Tube Tester Primer.....by popular request
  44. Kenwood TS 870 transmit above 7.100Mhz?
  45. Yaesu FT757GX2 low power out on 40m & 80m
  46. Cushman Radio System Analyzer CE-6000 schematic wanted.
  47. Adjusting SSB slopes without proper oscilloscope (70cm band)
  48. leader ldm-853a digital multimeter
  49. Kenwood - Glass surge fuse
  50. Motorola PA information needed
  51. IC-735 goes on TX by itself
  52. TS440S Dot Problem, hey I fixed it :D
  53. Unexplained Final failures in Yaesu and Icom and Kenwood HF transceivers
  54. ts 430s flashing mode lights
  55. Uniden President HR2600 no transmit and/or antenna/tuner issues?
  56. Motorola Micom Schematic
  57. Brimstone 144 modify tone burst circuit
  58. Problem with YAESU FT-757 GX2 keyer unit
  59. IF tap point
  60. Coaxial Trap Frequency with MFJ-259
  61. Limiting VERY STRONG Receiver Saturation
  62. Kenwood TS50 power switch
  63. HO-5404: Wild Gooses Chase!
  64. Kenwood TK-981 ver 2 troubleshooting
  65. Kenwood AT-200 tuuner question
  66. Kenwood SM-220 Low Pan Display Output
  67. adding SS-64 encoder to IC 255a
  68. World's simplest VHF oscillator!
  69. yaesu ft 900 color display
  70. IC2200 (rx low)
  71. Icom IC-27H randomly "opens"
  72. Yaesu FT-221 mods for the YC-221 Display
  73. Icom IC-765 Low Volume and Distorted SSB Receive
  74. Can i reverse mod on a galaxy Dx2517
  75. Alinco DR-235 off frequency
  76. Does the 2sc2509 have an internal diode between Collector and Emitter
  77. ICOM PCR1000 problem
  78. ID-O-Matic II
  79. what is this?
  80. FT-8000 Recieve Problem
  81. Twoer Schematic
  82. re kenwood ts 430 S lost AM
  83. Kenwood TM D-700 Transmit Problem
  84. Yaesu FT-712 overheading, drops receive until it cools down
  85. TS-140S IF Shift problem.
  86. Kenwood 120s sticking trans relay
  87. Why Tentec RX 340 is a " premium receiver " if it has a poor 55db dynamic range ?
  88. IC-202S schematic diagram with user manual
  89. Problems with YAESU FT-840 Dial
  90. Mo' power = Mo' better
  91. Older mobile radios with low rx current drain?
  92. Modern Alternator Noise/Whine on your FM Transceiver
  93. FT 897 Reveiving problems
  94. kenwood ts50
  95. Do I have a blown final on my FT-817ND?
  96. FT-767DX (FT-707) Service Manual
  97. CT Europe Dual Lever Key -- Need Help in Adjusting it!
  98. Odd 746Pro Problem regarding CW mode
  99. Kenwood TS590S, downconversion for lower bands?
  100. Dentron RT-3000 inductor shaft collar slipping
  101. New key-caps for Omni V?
  102. Another Yaesu FT 840 with problems
  103. PYRAMID PS-36K
  104. Replacing Old Components With New ???
  105. Icom IC-725 Synth Issue ?
  106. IC-27H Battery Replacement
  107. Checking out a new radio
  108. Kenwood TS-430S: Lithium backup battery lasts only a few days
  109. Kenwood TS-450 internal ATU flat flexible cable
  110. Can anyone repair a Kenwood TH-78A HT?
  111. Kenwood TS-870
  112. Penntek SA-500E Spectrum Analyzer Manual Needed
  113. Help diagnosing an HTX-100, will not transmit
  114. TS-440 RF board connections
  115. Kenwood TS-430S display shows "0" on power-up, static in speaker, no signals heard.
  116. FT-1000D meter sticking
  117. TS-480SAT Popping and Reciever Going out
  118. power cord connections for ts 700sp
  119. Repair Help
  120. TS-120V CW Tx problem after fitting filter
  121. pl tone board for kenwood tr9130
  122. Kenwood th-79a UHF transmit power very low
  123. Yaesu Ft-920 strange effect...
  124. ft-2800m No mic functions
  125. anyone with a spare power supply dead or alive for ICOM 701
  126. yaesu 2800m
  127. Realistic DX-390 repair help
  128. IC-746 Receive Drops on Transmit
  129. FT-857 S-meter not working in FM narrow mode only
  130. icom ic-728 hf rig.
  131. Icom 746 non pro power meter.
  132. Dentron DTR-1200L repair help!
  133. MFJ Antenna Tuner - needed maintenance
  134. IC-02E shematic for newer version
  135. help me fix ATS 818
  136. FT-8000 No RX audio issue
  137. flooded icom ic 25
  138. Need a 74S10 or 54S10 To Repair Equipment
  139. tm-731a pilot lamps
  140. DenTron Jr Monitor antenna coupler SWR modification
  141. Who has CFJ455K6 filter originally in IC-275, IC-475, IC-1275 or other icom rig?
  142. HTX-100 Won't Modulate CW
  143. ic-451 alignment
  144. Kenwood TS-450S Stiff main dial
  145. Cleaning solid brass CW keys...
  146. FT8500
  147. IC-751 txmit on both LSB, and USB simultainously...what is it?
  148. Alinco DR570T lithium battery replacement
  149. W52 wire on main unit in IC-275H
  150. Battery help
  151. Tech Help
  152. who has IC-275 where serial Nunber is more than 031..?
  153. Ft 767GX (No TX on HF)
  154. Icom 751a Loss of frequency Display
  155. help matching up radio manufacturer part# with oe parts manufacturer part#
  156. TYT UVF1 no VFO Mode after programming. Can't reset
  157. icim 751a band dropouts
  158. AEA MM-3 Keyer Problems
  159. All HF band amps , without tuni coils ?
  160. Kenwood TS-430 IF board replaced; no CW sidetone or VOX xmsn
  161. IC 706 MKIIG 17 & 15 meter issue
  162. Lionel J-36 Label Restoration
  163. Astron Power Supply
  164. VALVE AUDIO TRANSFORMERS, An alternative approach, by G0CWA
  165. ICOM IC746 now dead
  166. FT-8100r dead
  167. How to open EBP-28N battery pack /Alinko DJ-580/
  168. Icom 706mkll acc plug
  169. Icom IC-M411 With the dreaded reception problem
  170. FT107M Full service manual needed
  171. President Jackson Parts Wanted...
  172. kenwood tkr820 uhf repeater
  173. Alinco DX-SR8T
  174. One Tube Regenerative Radio Circuit
  175. Dentorn Clipperton L Amp Repair
  176. UBC175XL scannerr schematic
  177. Any good places to repair a VX5R??
  178. Atlas 110 transmitter rf fading after 2 min of CW
  179. HELP!! Yaesu 857D
  180. ICOM 551-D half dead
  181. Soldering station
  182. Lapel speaker/mic for the SM50
  183. IC-275H no RX/TX and nothing on display
  184. Pyramid power supply PS 14K now 24V!
  185. Yaesu FT-901DM HF Transceiver SSB Problem Please Help..
  186. HW-8, no power output
  187. Choosing A Digital Oscilloscope
  188. Leader LBO-518 Scope Schematic Needed
  189. TH-D72A repair
  190. Help with circuts
  191. New Video: Basics of Sweep Generators and RX alignment
  192. IC-738 Display Lights
  193. Kenwood TM-733A Lithium Battery Replacement, add battery holder, Ideas?
  194. ICOM PS-300 Noisy Fan Replacement.
  195. Standard GX2341 Marine Radio Mic Pinout???
  196. Yaesu FT-530 Service Manual/Technical Supplement Needed
  197. Short in antenna socket in FT 747GX
  198. ICOM IC 706 MK2 G Problem
  199. Yaesu Vx-7r charging problems
  200. Kenwood TS2000 No Transmit No Receive.
  201. FT-897D Main Dial Help Please
  202. I Dont Know What this is, HELP!
  203. Anyone have a spare Yaesu FT-897D Main Dial Rotary Encoder?
  204. IC-735 strange tone in SSB, CW receive audio
  205. rci ranger 2950 speaker
  206. Alinco ALM203E doesnt remember channels
  207. Nichols' Nuggets, Tidbits of Truth about Electronics Fundamentals, Part 1
  208. MICOM-XF Wanted Schematic FLN-6337A Interface S board
  209. Alinco DR 110 2 Meter 50 watt Radio
  210. Need Schematic Nova Tech Pal 3 band direction finder RDF -410
  211. Help with Alinco vhf/uhf mobile radio
  212. JRC JSB-196 HF SSB using SGC tuner
  213. Heathkit SB-104A RF output problem
  214. Convert 6LQ6 to EL-509 in Swan 500CX
  215. Kenwood TS-520SE Low Receiver Sensitivity Question
  216. AlincoDR605E Memory channels
  217. atenuador do icom ic-718
  218. Heath Frequency Counter (SM-118A)
  219. ic 229h no modulation, NOT Mike related ( tried 3 Mics! ) suspect radio it self.
  220. Icom IC-E208 service menu
  221. External Band Scope for IC-7200?
  222. I490A no FM Deviation/SSB output
  223. Replace IC-706 LCD display?
  224. Philips PM6666 Counter Timer
  225. Curve tracer , kit info ?
  226. Yaesu off frequency
  227. VX-150 Schematic
  228. how 7.000 to 7.200 tx mod. on kenwood ts 950 sd?
  229. Yeasu external tuner Communications Protocol
  230. Icom 736 Schematic
  231. RELM CTCSS encoder TE8NP pinouts
  232. Kenwood 950
  233. Ic-706mk11 rf out put problem
  234. Kenwood ts-950sdx sub rx
  235. Need help with SMD device
  236. GSV-3000 schematic
  237. Mirage B215G Schematic
  238. B&K 2050 signal generator help for s-meter adjustment can it be used?
  239. PowerPole Standards? MFJ-1124
  240. Display on Icom IC706 Mk2 G
  241. Yaesu ft-450 firmware
  242. IC-706 MkIIG Transmit range question.
  243. ATX supply question
  244. hsms-2920 diode
  245. Alinco dx77 output issue
  246. Connection counter frecuency on Atlas 210X help
  247. Motorola XPR 6300
  248. Ten Tec Triton 2 question
  249. Yaesu Ft 857D CW Issues
  250. Kenwood TS-430 and TS-440 all dots on display solution