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  1. Trying to ID maker of O/P Transformers from 'Fuji-Star' tuner
  2. Dynaco Gear or Marketing?
  3. Help me ID these tubes
  4. BOC amp BP-40-k schematic
  5. Bias Schematic
  6. Filtering of DC volts?
  7. Motorola Stereophonic
  8. Helping a newbie break the code...
  9. Additional help.
  10. Help with tube ID.
  11. First build! Heater supply question
  12. Reasonable derating for a power transformer ?
  13. Information wanted on an old amp
  14. Quick question about heater voltage
  15. ECC83 Phase Splitter Voltages
  16. Bias Probe Question
  17. Vintage parts to new amp
  18. Converting all unbalanced connections to balanced
  19. ACF-2 Build
  20. Frequency dependent power rating; OPT se
  21. 6L6 SE AMP
  22. Need to know some kind of found tubes
  23. Sansui 1000a opt max current question
  24. 12U7 - any users out there?
  25. 6GW8 Tube Test Data Needed
  26. 832A headphone amplifier
  27. Help with el84 valves
  28. Tube Preamp philips Mullard
  29. ecc99 2a3
  30. Chinese amp Oscillation
  31. tube regulators
  32. Storing spare tubes
  33. Best way to re-apply text to vintage amp chassis?
  34. B&K 747 troubleshooting
  35. Technical questions: understanding "El Cheapo Grande"
  36. Another Approach to Totem Pole OTL Amplifier
  37. Dynaco ST-70 vs.... ????
  38. Tube rectifiers also need snubber capacitors?
  39. HV regulator design - opinions?
  40. 4E27 / 8001 transmitting tube
  41. testing WE 420A / 5755
  42. String LEDs on long tail pair?
  43. SMPS Tube kit - Interested?
  44. tung-sol 7236
  45. PT Failed Winding
  46. ID for an AMprex something...
  47. Help with floating AC heaters (please)
  48. parallel secondaries, both with center taps
  49. Eico ST 40
  50. Opt primary impedance for audionote M10 phono pre
  51. Sansui AU-70 hum in one channel
  52. Pye HF25 Monoblocks
  53. Magnavox 6V6 circuit and output transformers.
  54. 13.8 volt smps for a kt120 SE amp???
  55. EL84 custom monoblocks
  56. Little Bear pre amp valuable find...
  57. ECL8? Is this the proper name of this tube?
  58. EL 502 / EL 511
  59. Used too weak diode, fuse blew.
  60. My first ever vacuum tube amplifier :)
  61. ATS25N -- Any use for audio ??
  62. Maggie 9300 Amp Problem
  63. Musicmaster 6AQ5A socket
  64. 6922 or 12AX7
  65. nobsound amp
  66. New project: pre and power mono, what to build?
  67. Radford bias: options for ultralinear output
  68. Class D Amplifier -- building blocks
  69. HT windings with no CT
  70. Dynaco st 70 resistor
  71. Older Conrad Johnson or new something else
  72. Power supply dummy load
  73. Micro-power, micro cost amp with Rod-Tubes, 1P24B-V
  74. A bit of fun with archaic converters
  75. DOUK 5670+6AQ5+6E2 push-pull merge Class AB tube amp HIFI amplifier DIY KIT
  76. Counterpoint SA-5.1 with dead channel
  77. need safety advise - speaker output ternimals
  78. Marantz 8B Replica Build
  79. Why Gold Grids
  80. "Shiny Eyes" PSE 300B
  81. PCB layout for Valves
  82. rogers cadet mkiii
  83. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  84. My GM70 amp...separating the input+driver from the output stage
  85. My Quad II and 22 restoration
  86. Help with an OTL CV3618 amp design
  87. stancore NOS power transformer Picture
  88. Choosing a tube amplifier to build, HELP needed
  89. FB circuit for a Maggie 175 with Edcor UL OT's
  90. Gary Lays it on the Line (Classic Output XFMRs)
  91. Info needed on adding subwoofer to tune amp
  92. Help me understand this 7189A SE tube amp?
  93. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  94. Tube amp project for 4 ohm speakers
  95. Wouldn't equal plate V + screen V = triode mode?
  96. 866A, 3B25 LTSPICE models
  97. 6HB6 as finals
  98. Leak OP Transformer Mod - Assistance please
  99. strange noise from tube line amp
  100. 6a6 tube as power output in headphone amp
  101. Mullard 6-7 stereo valve amp rebuild
  102. tube regulator for B+
  103. Yet another HV regulator
  104. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  105. Odd stabilized HV power EF86 + EL84
  106. NL710, 6011
  107. Somebody can identify this tube?
  108. Bullet proof driver circuit
  109. Need Grounding Advice for my System
  110. Use the chassis as the heatsink - Need safety advise
  111. Kofi's Tetra Sans
  112. Spice Simulation of NFB Amp with embedded PF
  113. Simplicity or complexity?
  114. 6N16B Aikido
  115. How to test a power supply
  116. Buying tubes in Bulgaria
  117. Input Trafo MFG reviews needed
  118. A cautinary tale.
  119. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  120. ecc99-2a3:opinion
  121. AutoCAD tube/valve blocks
  122. Step By Step Journal Of My TubeLab SSE build
  123. Triode troubles
  124. Safe PSU capacitor values for old Dyna amp?
  125. KT88, 6550 SE Triode Strapped Performance.
  126. Dynaco A431 OPTs
  127. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  128. SST-70 w/KT-150's mono's build
  129. Error Correction?
  130. Tube amp issue
  131. 4x6N3 preamp board from ebay
  132. time delayed LED for heater
  133. Aikido PSU decisions
  134. coupling caps for RCA rebuild
  135. Recommended coax
  136. Adding solid state bass to valves
  137. Incompatibility between Aikido Pre and Tubelab SimpleSE
  138. What power amp design would suit Esoteric MG-20?
  139. PL36 (triode) SE
  140. Any thoughts on this?
  141. BAT VK 55 paralleled
  142. Looking for a good phono preamp schematic.
  143. Nice diy from Poland
  144. Unballancer humming in one channel
  145. 6S19P tubes instead of 7233 tubes.?
  146. Looking for good stereo amp <$350 - help
  147. Question on EL84 SE triode with CCS at cathode
  148. Convert choke loaded 12b4 to CCS and retain od3's
  149. What can I make with these?
  150. 12AT7 LTP Calling Eli Duttman
  151. Book Help, Please?
  152. Amplifier class A EL34
  153. ps audio hybrid tube buffer
  154. FS: Copper chassis, OPT and Power Xfmrs
  155. Negative Feedback Amplifier with embedded Positive Feedback Booster
  156. Looking for a single ended amp.
  157. EF39 as 300B driver...
  158. How is Electro Harmonix 6922 sonicly compared to NOS?
  159. Tube amp driving a Subwoofer
  160. Leak Stereo 20 Power Supply Choke?
  161. help me read circuit: broski 300b shunt reg
  162. CCS current regulators for OP valves
  163. 1930's push pull field coil amplifier
  164. Loudness and power and volts
  165. Opinions; big mess or have potential?
  166. Premier 90 Reverb Buzzzzz
  167. Star grounding
  168. High NFB OTL headphone amp
  169. Any technical advantages of almost floating grounds?
  170. Twisted power cables
  171. Output transformer
  172. 12AU7 Tube Line Pre-amp on Ebay
  173. Would you run these at say 1200vdc?
  174. MOSFET equivalent
  175. 6BY5 GA full wave rectifier replacement
  176. ID those parts - trafo
  177. Sweeps in class A
  178. Preamp valve rectified power supply
  179. Grommes Precision S-35 - Worth playing with?
  180. 6922 or E88CC in the Rode NTK Mic
  181. What the hell caused this?
  182. 6SN7 Aikido White Follower - Spice simulation
  183. Need to build a moving coil stage
  184. You guys and gals recognize any of this equipment?
  185. Help with first amp design, SET no feedback hp amp
  186. LTSPICE problems with 10Y model
  187. 5876 tube
  188. P2P wiring and cable types
  189. Claus Byrith 4-30: missing valve in the PCB?
  190. KR T1610 PP amp building
  191. Pls Help me Identify these Tubes!
  192. measuring output transformer primary impedance
  193. Unusual output transformer Triad
  194. Input transformer differences
  195. Faint buzz through power stage (845)
  196. Pros and Cons of 3rd Stage in SE (6AV5/2A3 drive requirements)
  197. Star grounding - wooden box
  198. R601P Tube Radio
  199. analog metric el34 se amp
  200. EL34 PP amplifier suggestions
  201. 6AU6 Triode Mode
  202. Another GM70
  203. newbie amp question.
  204. Push-Pull Plate Choke from Edcor?
  205. Finalizing 300B Amps==Please Comment
  206. Help!!!
  207. Controlling gain in VA stage
  208. 833 Push Pull Design
  209. restoring mullard valve paint
  210. Mentmore TVA1
  211. DIY in Korea?
  212. Case suggestions for Pye Black Box?
  213. help trouble shooting a problem
  214. Liteaudio 1s37 Phono preamp
  215. All DHT tube amp dream
  216. Suggestion for valve amp kit
  217. Alps black beauty inductive?
  218. Why are directly heated rectifiers still popular?
  219. Headphone amp with pre out
  220. wish to buy 10's or other tungsten DHT's
  221. Audio Innovations Series 300 II -red plate
  222. 811 heater power supply...
  223. Bijou resistors specs
  224. Bijou schematics question (PINs)
  225. Looking for a proficient tube tech in New England.
  226. hybrid amplifier using EF86
  227. Looking in San Diego....
  228. Ground of tube headphone amp
  229. Input Transformer Question
  230. Low imp tube headphone diy amp
  231. Cathode Follower as DAC Output Stage?
  232. Monoblock Gu-50 help.
  233. Aikido CF question
  234. Tube Power Amp Kit Recommendations
  235. EL34,KT66,6L6GC,KT77:who works better with high impedance OT load in SE Triode Mode?
  236. ECC40 Voltage Question
  237. Question re DC coupling vs RC coupling (AC)
  238. Measuring ripple in filament supply (coleman reg)
  239. What about use largest possible capacitor as interstage decoupling ( 1 or 2uf)
  240. replace 6N3 tube preamp with mullard E555L
  241. Preamp to Poweramp tube proximity/spacing?
  242. List of Tube Noise Measurements - please nominate lowest noise tubes
  243. Just for interest
  244. Time to build the big one.
  245. Opinion? Would the input/driver from a HK-5 be good to replace original Mk3 ft. end??
  246. Has anyone built this kit?
  247. 22 AWG PTFE Wire jacket
  248. mu-follower with output transformer?
  249. ECC81 double triode tubes flashed brightly when switched on.
  250. pre amp with tone controll

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