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  1. need safety advise - speaker output ternimals
  2. Marantz 8B Replica Build
  3. Why Gold Grids
  4. "Shiny Eyes" PSE 300B
  5. PCB layout for Valves
  6. rogers cadet mkiii
  7. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  8. My GM70 amp...separating the input+driver from the output stage
  9. My Quad II and 22 restoration
  10. Help with an OTL CV3618 amp design
  11. stancore NOS power transformer Picture
  12. Choosing a tube amplifier to build, HELP needed
  13. FB circuit for a Maggie 175 with Edcor UL OT's
  14. Gary Lays it on the Line (Classic Output XFMRs)
  15. Info needed on adding subwoofer to tune amp
  16. Help me understand this 7189A SE tube amp?
  17. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  18. Tube amp project for 4 ohm speakers
  19. Wouldn't equal plate V + screen V = triode mode?
  20. 866A, 3B25 LTSPICE models
  21. 6HB6 as finals
  22. Leak OP Transformer Mod - Assistance please
  23. strange noise from tube line amp
  24. 6a6 tube as power output in headphone amp
  25. Mullard 6-7 stereo valve amp rebuild
  26. tube regulator for B+
  27. Yet another HV regulator
  28. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  29. Odd stabilized HV power EF86 + EL84
  30. NL710, 6011
  31. Somebody can identify this tube?
  32. Bullet proof driver circuit
  33. Need Grounding Advice for my System
  34. Use the chassis as the heatsink - Need safety advise
  35. Kofi's Tetra Sans
  36. Spice Simulation of NFB Amp with embedded PF
  37. Simplicity or complexity?
  38. 6N16B Aikido
  39. How to test a power supply
  40. Buying tubes in Bulgaria
  41. Input Trafo MFG reviews needed
  42. A cautinary tale.
  43. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  44. ecc99-2a3:opinion
  45. AutoCAD tube/valve blocks
  46. Step By Step Journal Of My TubeLab SSE build
  47. Triode troubles
  48. Safe PSU capacitor values for old Dyna amp?
  49. KT88, 6550 SE Triode Strapped Performance.
  50. Dynaco A431 OPTs
  51. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  52. SST-70 w/KT-150's mono's build
  53. Error Correction?
  54. Tube amp issue
  55. 4x6N3 preamp board from ebay
  56. time delayed LED for heater
  57. Aikido PSU decisions
  58. coupling caps for RCA rebuild
  59. Recommended coax
  60. Adding solid state bass to valves
  61. Incompatibility between Aikido Pre and Tubelab SimpleSE
  62. What power amp design would suit Esoteric MG-20?
  63. PL36 (triode) SE
  64. Any thoughts on this?
  65. BAT VK 55 paralleled
  66. Looking for a good phono preamp schematic.
  67. Nice diy from Poland
  68. Unballancer humming in one channel
  69. 6S19P tubes instead of 7233 tubes.?
  70. Looking for good stereo amp <$350 - help
  71. Question on EL84 SE triode with CCS at cathode
  72. Convert choke loaded 12b4 to CCS and retain od3's
  73. What can I make with these?
  74. 12AT7 LTP Calling Eli Duttman
  75. Book Help, Please?
  76. Amplifier class A EL34
  77. ps audio hybrid tube buffer
  78. FS: Copper chassis, OPT and Power Xfmrs
  79. Negative Feedback Amplifier with embedded Positive Feedback Booster
  80. Looking for a single ended amp.
  81. EF39 as 300B driver...
  82. How is Electro Harmonix 6922 sonicly compared to NOS?
  83. Tube amp driving a Subwoofer
  84. Leak Stereo 20 Power Supply Choke?
  85. help me read circuit: broski 300b shunt reg
  86. CCS current regulators for OP valves
  87. 1930's push pull field coil amplifier
  88. Loudness and power and volts
  89. Opinions; big mess or have potential?
  90. Premier 90 Reverb Buzzzzz
  91. Star grounding
  92. High NFB OTL headphone amp
  93. Any technical advantages of almost floating grounds?
  94. Twisted power cables
  95. Output transformer
  96. 12AU7 Tube Line Pre-amp on Ebay
  97. Would you run these at say 1200vdc?
  98. MOSFET equivalent
  99. 6BY5 GA full wave rectifier replacement
  100. ID those parts - trafo
  101. Sweeps in class A
  102. Preamp valve rectified power supply
  103. Grommes Precision S-35 - Worth playing with?
  104. 6922 or E88CC in the Rode NTK Mic
  105. What the hell caused this?
  106. 6SN7 Aikido White Follower - Spice simulation
  107. Need to build a moving coil stage
  108. You guys and gals recognize any of this equipment?
  109. Help with first amp design, SET no feedback hp amp
  110. LTSPICE problems with 10Y model
  111. 5876 tube
  112. P2P wiring and cable types
  113. Claus Byrith 4-30: missing valve in the PCB?
  114. KR T1610 PP amp building
  115. Pls Help me Identify these Tubes!
  116. measuring output transformer primary impedance
  117. Unusual output transformer Triad
  118. Input transformer differences
  119. Faint buzz through power stage (845)
  120. Pros and Cons of 3rd Stage in SE (6AV5/2A3 drive requirements)
  121. Star grounding - wooden box
  122. R601P Tube Radio
  123. analog metric el34 se amp
  124. EL34 PP amplifier suggestions
  125. 6AU6 Triode Mode
  126. Another GM70
  127. newbie amp question.
  128. Push-Pull Plate Choke from Edcor?
  129. Finalizing 300B Amps==Please Comment
  130. Help!!!
  131. Controlling gain in VA stage
  132. 833 Push Pull Design
  133. restoring mullard valve paint
  134. Mentmore TVA1
  135. DIY in Korea?
  136. Case suggestions for Pye Black Box?
  137. help trouble shooting a problem
  138. Liteaudio 1s37 Phono preamp
  139. All DHT tube amp dream
  140. Suggestion for valve amp kit
  141. Alps black beauty inductive?
  142. Why are directly heated rectifiers still popular?
  143. Headphone amp with pre out
  144. wish to buy 10's or other tungsten DHT's
  145. Audio Innovations Series 300 II -red plate
  146. 811 heater power supply...
  147. Bijou resistors specs
  148. Bijou schematics question (PINs)
  149. Looking for a proficient tube tech in New England.
  150. hybrid amplifier using EF86
  151. Looking in San Diego....
  152. Ground of tube headphone amp
  153. Input Transformer Question
  154. Low imp tube headphone diy amp
  155. Cathode Follower as DAC Output Stage?
  156. Monoblock Gu-50 help.
  157. Aikido CF question
  158. Tube Power Amp Kit Recommendations
  159. EL34,KT66,6L6GC,KT77:who works better with high impedance OT load in SE Triode Mode?
  160. ECC40 Voltage Question
  161. Question re DC coupling vs RC coupling (AC)
  162. Measuring ripple in filament supply (coleman reg)
  163. What about use largest possible capacitor as interstage decoupling ( 1 or 2uf)
  164. replace 6N3 tube preamp with mullard E555L
  165. Preamp to Poweramp tube proximity/spacing?
  166. List of Tube Noise Measurements - please nominate lowest noise tubes
  167. Just for interest
  168. Time to build the big one.
  169. Opinion? Would the input/driver from a HK-5 be good to replace original Mk3 ft. end??
  170. Has anyone built this kit?
  171. 22 AWG PTFE Wire jacket
  172. mu-follower with output transformer?
  173. ECC81 double triode tubes flashed brightly when switched on.
  174. pre amp with tone controll
  175. Making own hifi tube amp from scratch!!
  176. Pentode CCS as a load for long tailed pair?
  177. E88CC & 6N23P plate voltage range?
  178. First pre phono design [newbie]
  179. Struggling with LTspice - How to use .inc to get a tube to appear
  180. Eico St 40
  181. ECC88 Input/driverstage for F4 amp
  182. Tube headphone amp
  183. Rike Audio S-cap
  184. Acquired free brand new Jolida 302a
  185. Triode vs Transistor
  186. Help with restoration of Audio Research equipment
  187. Grommes 103gt tuner
  188. Frank’s 6SN7 pre & regulated supply
  189. Sleeping giant
  190. hum by mounting powertransformer and tubes on same chassis
  191. Rectifier tube overheating
  192. "World's Best Technical Master Craftsmen"
  193. OPT for 2A3
  194. getting rid of pre amp in a tube amp
  195. A question on OPT and no loads.
  196. Auto-Bias vs Manual bias vs EFB
  197. Russian receiving tubes and foreign equivalents
  198. B+ delay timer module
  199. Testing DIY triodes
  200. Adding a dummy load to prevent amp from being damaged by having no load?
  201. 30 watt class A chopper controlled bias with 6 EL84
  202. THD
  203. Input resistor (What are purposes?)
  204. Posted new 300B push-pull amp design
  205. Help me source a pair of OPT for Knight KG-240 tube amp
  206. Help Pick Transformers for EICO HF-87
  207. PreAmp
  208. Original price of the Conrad Johnson PV-5
  209. balance pots in Williamson driver stage
  210. Another Question on Tektronix Transformers
  211. Philco K1629 Upgrade Options
  212. My return to tubes, via headphones - what circuit would you recommend?
  213. High Quality EL84 UL SE Amplifier
  214. regulated supply to CCS plate load
  215. Twin Audio Sinfonia Preamp
  216. ecll800 schematic confusion
  217. 6L6 recommendations
  218. tube 100th
  219. Luxman OY15-5k OPT?
  220. Has anyone had experience with Russian 5C8S and 5C9S?
  221. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  222. DC-DC converters
  223. EL 84 pp amp - simple regulated circuit sought
  224. Any tube amp to drive B&W 802D?
  225. New to valve amplifiers
  226. SE 6GW8 output transformer with 5 wires.
  227. Mr.Curwen's single ended adventures
  228. Tube magic eye with em84-sensitivity?!
  229. Tube test
  230. Brimar 6V6 USSR
  231. Construction Guides
  232. World Design KT88 Kit
  233. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  234. Clone X10D problems distortion / saturation ... help!
  235. 12DW7 or 12AU7+12AX7 if stereo?
  236. First preamp and gain control
  237. Tube life..
  238. Berman 76 preamplifier, I need some advice please
  239. How to light GM70 tube as decorative?
  240. Old Tube amp missing tubes. HELP
  241. Going to Berlin, looking for electronics diy shops
  242. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  243. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  244. Help with Eico ST70
  245. Class-D and Tube buffer/preamp off same 12V SLA?
  246. Hard time to find High Voltage medium power linear BJT
  247. Gu50 or 1624 PP amp first trials
  248. cathode follower driver A2
  249. High Pass Filter for OTL headphone Amp
  250. Bewitch 6550 Balance Issue

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