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  1. help me read circuit: broski 300b shunt reg
  2. CCS current regulators for OP valves
  3. 1930's push pull field coil amplifier
  4. Loudness and power and volts
  5. Opinions; big mess or have potential?
  6. Premier 90 Reverb Buzzzzz
  7. Star grounding
  8. High NFB OTL headphone amp
  9. Any technical advantages of almost floating grounds?
  10. Twisted power cables
  11. Output transformer
  12. 12AU7 Tube Line Pre-amp on Ebay
  13. Would you run these at say 1200vdc?
  14. MOSFET equivalent
  15. 6BY5 GA full wave rectifier replacement
  16. ID those parts - trafo
  17. Sweeps in class A
  18. Preamp valve rectified power supply
  19. Grommes Precision S-35 - Worth playing with?
  20. 6922 or E88CC in the Rode NTK Mic
  21. What the hell caused this?
  22. 6SN7 Aikido White Follower - Spice simulation
  23. Need to build a moving coil stage
  24. You guys and gals recognize any of this equipment?
  25. Help with first amp design, SET no feedback hp amp
  26. LTSPICE problems with 10Y model
  27. 5876 tube
  28. P2P wiring and cable types
  29. Claus Byrith 4-30: missing valve in the PCB?
  30. KR T1610 PP amp building
  31. Pls Help me Identify these Tubes!
  32. measuring output transformer primary impedance
  33. Unusual output transformer Triad
  34. Input transformer differences
  35. Faint buzz through power stage (845)
  36. Pros and Cons of 3rd Stage in SE (6AV5/2A3 drive requirements)
  37. Star grounding - wooden box
  38. R601P Tube Radio
  39. analog metric el34 se amp
  40. EL34 PP amplifier suggestions
  41. 6AU6 Triode Mode
  42. Another GM70
  43. newbie amp question.
  44. Push-Pull Plate Choke from Edcor?
  45. Finalizing 300B Amps==Please Comment
  46. Help!!!
  47. Controlling gain in VA stage
  48. 833 Push Pull Design
  49. restoring mullard valve paint
  50. Mentmore TVA1
  51. DIY in Korea?
  52. Case suggestions for Pye Black Box?
  53. help trouble shooting a problem
  54. Liteaudio 1s37 Phono preamp
  55. All DHT tube amp dream
  56. Suggestion for valve amp kit
  57. Alps black beauty inductive?
  58. Why are directly heated rectifiers still popular?
  59. Headphone amp with pre out
  60. wish to buy 10's or other tungsten DHT's
  61. Audio Innovations Series 300 II -red plate
  62. 811 heater power supply...
  63. Bijou resistors specs
  64. Bijou schematics question (PINs)
  65. Looking for a proficient tube tech in New England.
  66. hybrid amplifier using EF86
  67. Looking in San Diego....
  68. Ground of tube headphone amp
  69. Input Transformer Question
  70. Low imp tube headphone diy amp
  71. Cathode Follower as DAC Output Stage?
  72. Monoblock Gu-50 help.
  73. Aikido CF question
  74. Tube Power Amp Kit Recommendations
  75. EL34,KT66,6L6GC,KT77:who works better with high impedance OT load in SE Triode Mode?
  76. ECC40 Voltage Question
  77. Question re DC coupling vs RC coupling (AC)
  78. Measuring ripple in filament supply (coleman reg)
  79. What about use largest possible capacitor as interstage decoupling ( 1 or 2uf)
  80. replace 6N3 tube preamp with mullard E555L
  81. Preamp to Poweramp tube proximity/spacing?
  82. List of Tube Noise Measurements - please nominate lowest noise tubes
  83. Just for interest
  84. Time to build the big one.
  85. Opinion? Would the input/driver from a HK-5 be good to replace original Mk3 ft. end??
  86. Has anyone built this kit?
  87. 22 AWG PTFE Wire jacket
  88. mu-follower with output transformer?
  89. ECC81 double triode tubes flashed brightly when switched on.
  90. pre amp with tone controll
  91. Making own hifi tube amp from scratch!!
  92. Pentode CCS as a load for long tailed pair?
  93. E88CC & 6N23P plate voltage range?
  94. First pre phono design [newbie]
  95. Struggling with LTspice - How to use .inc to get a tube to appear
  96. Eico St 40
  97. ECC88 Input/driverstage for F4 amp
  98. Tube headphone amp
  99. Rike Audio S-cap
  100. Acquired free brand new Jolida 302a
  101. Triode vs Transistor
  102. Help with restoration of Audio Research equipment
  103. Grommes 103gt tuner
  104. Frank’s 6SN7 pre & regulated supply
  105. Sleeping giant
  106. hum by mounting powertransformer and tubes on same chassis
  107. Rectifier tube overheating
  108. "World's Best Technical Master Craftsmen"
  109. OPT for 2A3
  110. getting rid of pre amp in a tube amp
  111. A question on OPT and no loads.
  112. Auto-Bias vs Manual bias vs EFB
  113. Russian receiving tubes and foreign equivalents
  114. B+ delay timer module
  115. Testing DIY triodes
  116. Adding a dummy load to prevent amp from being damaged by having no load?
  117. 30 watt class A chopper controlled bias with 6 EL84
  118. THD
  119. Input resistor (What are purposes?)
  120. Posted new 300B push-pull amp design
  121. Help me source a pair of OPT for Knight KG-240 tube amp
  122. Help Pick Transformers for EICO HF-87
  123. PreAmp
  124. Original price of the Conrad Johnson PV-5
  125. balance pots in Williamson driver stage
  126. Another Question on Tektronix Transformers
  127. Philco K1629 Upgrade Options
  128. My return to tubes, via headphones - what circuit would you recommend?
  129. High Quality EL84 UL SE Amplifier
  130. regulated supply to CCS plate load
  131. Twin Audio Sinfonia Preamp
  132. ecll800 schematic confusion
  133. 6L6 recommendations
  134. tube 100th
  135. Luxman OY15-5k OPT?
  136. Has anyone had experience with Russian 5C8S and 5C9S?
  137. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  138. DC-DC converters
  139. EL 84 pp amp - simple regulated circuit sought
  140. Any tube amp to drive B&W 802D?
  141. New to valve amplifiers
  142. SE 6GW8 output transformer with 5 wires.
  143. Mr.Curwen's single ended adventures
  144. Tube magic eye with em84-sensitivity?!
  145. Tube test
  146. Brimar 6V6 USSR
  147. Construction Guides
  148. World Design KT88 Kit
  149. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  150. Clone X10D problems distortion / saturation ... help!
  151. 12DW7 or 12AU7+12AX7 if stereo?
  152. First preamp and gain control
  153. Tube life..
  154. Berman 76 preamplifier, I need some advice please
  155. How to light GM70 tube as decorative?
  156. Old Tube amp missing tubes. HELP
  157. Going to Berlin, looking for electronics diy shops
  158. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  159. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  160. Help with Eico ST70
  161. Class-D and Tube buffer/preamp off same 12V SLA?
  162. Hard time to find High Voltage medium power linear BJT
  163. Gu50 or 1624 PP amp first trials
  164. cathode follower driver A2
  165. High Pass Filter for OTL headphone Amp
  166. Bewitch 6550 Balance Issue
  167. ground hum issues in an old peak st-100
  168. Need an APPJ PA0901A Mini Amp Output Transformer.
  169. VTL Tiny Triode Schematics?
  170. A question of dynamics: Amplifier design?
  171. Rechargeable battery for cathode bias: open discussion
  172. High quality tube socket for 4P1L tube ?
  173. VTL Schematic needed
  174. Diode rating for filament voltage doubler
  175. SE vs PP for SET amps
  176. Use "mu output" from depletion mode MOSFET load?
  177. GM70 SE mov rectifiers
  178. First Preamp build
  179. Fisher KX-200 driving a pair of ESL from the plates
  180. Disadvantages of unbalanced tube
  181. The anatomy of a vacuum toob
  182. Valve Amplification Company CLA1 mkii help
  183. leak stereo 20 channel imbalance
  184. Mains powered 20W submin bridge amp
  185. SS rectification ST70
  186. K-12g ultra fast diode mod UF4007
  187. WE46c..
  188. 10 Pin B10A socket
  189. RIAA network adjustment
  190. audio research sp16
  191. Visiting Japan
  192. "up-rating" power filter chokes
  193. Differential pair gain/ where to apply feedback
  194. EL84 ECC83 SE Amp schematic
  195. high B+ voltage drop
  196. Volume control chip
  197. Faylon P200 rebuild
  198. Signal Ground
  199. New to 6DJ8 tube
  200. EL91 Max ratings ? help
  201. I need a distraction!
  202. 300B amp project
  203. "bevois valley" in triode
  204. Strange problem wit a 3 tube preamplifier
  205. JJ Tesla vs. Electro Harmonix for Hi-Fi EL84 SE?
  206. This Tube CB make
  207. tubecad el84 powersupply ps4 question
  208. ART Tube MP studio V3 problems
  209. Calculating Cathode Bias w/o tube curves?
  210. Cathode follower PA Driver in a cathode biased amp
  211. I have my first Valve Amp, help me not blow it up!
  212. Unison Research SR-1 schematic/service manual
  213. Mega Tube DIY project
  214. very very simple single ended 300b valve amp schematic?
  215. 300b with single stage driver, c3m or?
  216. Cap upgrade for SVP RIAA stage
  217. Quick Q about JC's upside down front end.
  218. Bogen beasts again
  219. I thought this was a joke...but..
  220. Black pollution
  221. Difference between 6N1P and 6N23P?
  222. low voltage AC umbilical advice
  223. RCA MI-4288J Amplifier - Any info?
  224. 3.5k OPT for 45 type tube?
  225. DIY/OOTB upgrade? PP/SE?
  226. Sansui AU70
  227. Moody 496 Schematic Wanted
  228. Center-tapped Plate Choke vs. OPT for PP plate loads
  229. Help sourcing some resistors with very special values for a project
  230. Power Transformer Rating?
  231. KT120 x 4 / 240W Push Pull TUBE AMP MONOBLOCKS
  232. How Much Wiring??
  233. Schematic request for Meixing Mingda MC-211
  234. 300B SE with an interstage
  235. 211/845 tubes in a 805 based amp ?
  236. Grid leak bias, how does it work?
  237. Melos Sha Gold Reference
  238. Tube Amp for MTM
  239. Dynaco ST-70 Series III
  240. #27 + 6N8S Mu-Follower: Vhk Max Question
  241. Tube Mic preamp with compressor - any ideas?
  242. Counterpoint Sa-5000 and Klimo Kent - needed service manuals
  243. Drawing loadline using interstage / choosing interstage
  244. My New Iron for Single Ended 2a3
  245. GU-50 push pull amplifier
  246. 12SL7GT vs 12SN7GT
  247. DIY power amp and speakers
  248. KT88 SE
  249. Building a 6bq5 set amp
  250. OPT DC question

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