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  1. ECC83 Phase Splitter Voltages
  2. Bias Probe Question
  3. Vintage parts to new amp
  4. Converting all unbalanced connections to balanced
  5. ACF-2 Build
  6. Frequency dependent power rating; OPT se
  7. 6L6 SE AMP
  8. Need to know some kind of found tubes
  9. Sansui 1000a opt max current question
  10. 12U7 - any users out there?
  11. 6GW8 Tube Test Data Needed
  12. 832A headphone amplifier
  13. Help with el84 valves
  14. Tube Preamp philips Mullard
  15. ecc99 2a3
  16. Chinese amp Oscillation
  17. tube regulators
  18. Storing spare tubes
  19. Best way to re-apply text to vintage amp chassis?
  20. B&K 747 troubleshooting
  21. Technical questions: understanding "El Cheapo Grande"
  22. Another Approach to Totem Pole OTL Amplifier
  23. Dynaco ST-70 vs.... ????
  24. Tube rectifiers also need snubber capacitors?
  25. HV regulator design - opinions?
  26. 4E27 / 8001 transmitting tube
  27. testing WE 420A / 5755
  28. String LEDs on long tail pair?
  29. SMPS Tube kit - Interested?
  30. tung-sol 7236
  31. PT Failed Winding
  32. ID for an AMprex something...
  33. Help with floating AC heaters (please)
  34. parallel secondaries, both with center taps
  35. Eico ST 40
  36. Opt primary impedance for audionote M10 phono pre
  37. Sansui AU-70 hum in one channel
  38. Pye HF25 Monoblocks
  39. Magnavox 6V6 circuit and output transformers.
  40. 13.8 volt smps for a kt120 SE amp???
  41. EL84 custom monoblocks
  42. Little Bear pre amp valuable find...
  43. ECL8? Is this the proper name of this tube?
  44. EL 502 / EL 511
  45. Used too weak diode, fuse blew.
  46. My first ever vacuum tube amplifier :)
  47. ATS25N -- Any use for audio ??
  48. Maggie 9300 Amp Problem
  49. Musicmaster 6AQ5A socket
  50. 6922 or 12AX7
  51. nobsound amp
  52. New project: pre and power mono, what to build?
  53. Radford bias: options for ultralinear output
  54. Class D Amplifier -- building blocks
  55. HT windings with no CT
  56. Dynaco st 70 resistor
  57. Older Conrad Johnson or new something else
  58. Power supply dummy load
  59. Micro-power, micro cost amp with Rod-Tubes, 1P24B-V
  60. A bit of fun with archaic converters
  61. DOUK 5670+6AQ5+6E2 push-pull merge Class AB tube amp HIFI amplifier DIY KIT
  62. Counterpoint SA-5.1 with dead channel
  63. need safety advise - speaker output ternimals
  64. Marantz 8B Replica Build
  65. Why Gold Grids
  66. "Shiny Eyes" PSE 300B
  67. PCB layout for Valves
  68. rogers cadet mkiii
  69. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  70. My GM70 amp...separating the input+driver from the output stage
  71. My Quad II and 22 restoration
  72. Help with an OTL CV3618 amp design
  73. stancore NOS power transformer Picture
  74. Choosing a tube amplifier to build, HELP needed
  75. FB circuit for a Maggie 175 with Edcor UL OT's
  76. Gary Lays it on the Line (Classic Output XFMRs)
  77. Info needed on adding subwoofer to tune amp
  78. Help me understand this 7189A SE tube amp?
  79. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  80. Tube amp project for 4 ohm speakers
  81. Wouldn't equal plate V + screen V = triode mode?
  82. 866A, 3B25 LTSPICE models
  83. 6HB6 as finals
  84. Leak OP Transformer Mod - Assistance please
  85. strange noise from tube line amp
  86. 6a6 tube as power output in headphone amp
  87. Mullard 6-7 stereo valve amp rebuild
  88. tube regulator for B+
  89. Yet another HV regulator
  90. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  91. Odd stabilized HV power EF86 + EL84
  92. NL710, 6011
  93. Somebody can identify this tube?
  94. Bullet proof driver circuit
  95. Need Grounding Advice for my System
  96. Use the chassis as the heatsink - Need safety advise
  97. Kofi's Tetra Sans
  98. Spice Simulation of NFB Amp with embedded PF
  99. Simplicity or complexity?
  100. 6N16B Aikido
  101. How to test a power supply
  102. Buying tubes in Bulgaria
  103. Input Trafo MFG reviews needed
  104. A cautinary tale.
  105. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  106. ecc99-2a3:opinion
  107. AutoCAD tube/valve blocks
  108. Step By Step Journal Of My TubeLab SSE build
  109. Triode troubles
  110. Safe PSU capacitor values for old Dyna amp?
  111. KT88, 6550 SE Triode Strapped Performance.
  112. Dynaco A431 OPTs
  113. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  114. SST-70 w/KT-150's mono's build
  115. Error Correction?
  116. Tube amp issue
  117. 4x6N3 preamp board from ebay
  118. time delayed LED for heater
  119. Aikido PSU decisions
  120. coupling caps for RCA rebuild
  121. Recommended coax
  122. Adding solid state bass to valves
  123. Incompatibility between Aikido Pre and Tubelab SimpleSE
  124. What power amp design would suit Esoteric MG-20?
  125. PL36 (triode) SE
  126. Any thoughts on this?
  127. BAT VK 55 paralleled
  128. Looking for a good phono preamp schematic.
  129. Nice diy from Poland
  130. Unballancer humming in one channel
  131. 6S19P tubes instead of 7233 tubes.?
  132. Looking for good stereo amp <$350 - help
  133. Question on EL84 SE triode with CCS at cathode
  134. Convert choke loaded 12b4 to CCS and retain od3's
  135. What can I make with these?
  136. 12AT7 LTP Calling Eli Duttman
  137. Book Help, Please?
  138. Amplifier class A EL34
  139. ps audio hybrid tube buffer
  140. FS: Copper chassis, OPT and Power Xfmrs
  141. Negative Feedback Amplifier with embedded Positive Feedback Booster
  142. Looking for a single ended amp.
  143. EF39 as 300B driver...
  144. How is Electro Harmonix 6922 sonicly compared to NOS?
  145. Tube amp driving a Subwoofer
  146. Leak Stereo 20 Power Supply Choke?
  147. help me read circuit: broski 300b shunt reg
  148. CCS current regulators for OP valves
  149. 1930's push pull field coil amplifier
  150. Loudness and power and volts
  151. Opinions; big mess or have potential?
  152. Star grounding
  153. High NFB OTL headphone amp
  154. Any technical advantages of almost floating grounds?
  155. Twisted power cables
  156. Output transformer
  157. 12AU7 Tube Line Pre-amp on Ebay
  158. Would you run these at say 1200vdc?
  159. MOSFET equivalent
  160. 6BY5 GA full wave rectifier replacement
  161. ID those parts - trafo
  162. Sweeps in class A
  163. Preamp valve rectified power supply
  164. Grommes Precision S-35 - Worth playing with?
  165. 6922 or E88CC in the Rode NTK Mic
  166. What the hell caused this?
  167. 6SN7 Aikido White Follower - Spice simulation
  168. Need to build a moving coil stage
  169. You guys and gals recognize any of this equipment?
  170. Help with first amp design, SET no feedback hp amp
  171. LTSPICE problems with 10Y model
  172. 5876 tube
  173. P2P wiring and cable types
  174. Claus Byrith 4-30: missing valve in the PCB?
  175. KR T1610 PP amp building
  176. Pls Help me Identify these Tubes!
  177. measuring output transformer primary impedance
  178. Unusual output transformer Triad
  179. Input transformer differences
  180. Faint buzz through power stage (845)
  181. Pros and Cons of 3rd Stage in SE (6AV5/2A3 drive requirements)
  182. Star grounding - wooden box
  183. R601P Tube Radio
  184. analog metric el34 se amp
  185. EL34 PP amplifier suggestions
  186. 6AU6 Triode Mode
  187. Another GM70
  188. newbie amp question.
  189. Push-Pull Plate Choke from Edcor?
  190. Finalizing 300B Amps==Please Comment
  191. Help!!!
  192. Controlling gain in VA stage
  193. 833 Push Pull Design
  194. restoring mullard valve paint
  195. Mentmore TVA1
  196. DIY in Korea?
  197. Case suggestions for Pye Black Box?
  198. help trouble shooting a problem
  199. Liteaudio 1s37 Phono preamp
  200. All DHT tube amp dream
  201. Suggestion for valve amp kit
  202. Alps black beauty inductive?
  203. Why are directly heated rectifiers still popular?
  204. Headphone amp with pre out
  205. wish to buy 10's or other tungsten DHT's
  206. Audio Innovations Series 300 II -red plate
  207. 811 heater power supply...
  208. Bijou resistors specs
  209. Bijou schematics question (PINs)
  210. Looking for a proficient tube tech in New England.
  211. hybrid amplifier using EF86
  212. Looking in San Diego....
  213. Ground of tube headphone amp
  214. Input Transformer Question
  215. Low imp tube headphone diy amp
  216. Cathode Follower as DAC Output Stage?
  217. Monoblock Gu-50 help.
  218. Aikido CF question
  219. Tube Power Amp Kit Recommendations
  220. EL34,KT66,6L6GC,KT77:who works better with high impedance OT load in SE Triode Mode?
  221. ECC40 Voltage Question
  222. Question re DC coupling vs RC coupling (AC)
  223. Measuring ripple in filament supply (coleman reg)
  224. What about use largest possible capacitor as interstage decoupling ( 1 or 2uf)
  225. replace 6N3 tube preamp with mullard E555L
  226. Preamp to Poweramp tube proximity/spacing?
  227. List of Tube Noise Measurements - please nominate lowest noise tubes
  228. Just for interest
  229. Time to build the big one.
  230. Opinion? Would the input/driver from a HK-5 be good to replace original Mk3 ft. end??
  231. Has anyone built this kit?
  232. 22 AWG PTFE Wire jacket
  233. mu-follower with output transformer?
  234. ECC81 double triode tubes flashed brightly when switched on.
  235. pre amp with tone controll
  236. Making own hifi tube amp from scratch!!
  237. Pentode CCS as a load for long tailed pair?
  238. E88CC & 6N23P plate voltage range?
  239. First pre phono design [newbie]
  240. Struggling with LTspice - How to use .inc to get a tube to appear
  241. Eico St 40
  242. ECC88 Input/driverstage for F4 amp
  243. Tube headphone amp
  244. Rike Audio S-cap
  245. Acquired free brand new Jolida 302a
  246. Triode vs Transistor
  247. Help with restoration of Audio Research equipment
  248. Grommes 103gt tuner
  249. Frank’s 6SN7 pre & regulated supply
  250. Sleeping giant

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