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  1. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  2. Tube amp project for 4 ohm speakers
  3. Wouldn't equal plate V + screen V = triode mode?
  4. 866A, 3B25 LTSPICE models
  5. 6HB6 as finals
  6. Leak OP Transformer Mod - Assistance please
  7. strange noise from tube line amp
  8. 6a6 tube as power output in headphone amp
  9. Mullard 6-7 stereo valve amp rebuild
  10. tube regulator for B+
  11. Yet another HV regulator
  12. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  13. Odd stabilized HV power EF86 + EL84
  14. NL710, 6011
  15. Somebody can identify this tube?
  16. Bullet proof driver circuit
  17. Need Grounding Advice for my System
  18. Use the chassis as the heatsink - Need safety advise
  19. Kofi's Tetra Sans
  20. Spice Simulation of NFB Amp with embedded PF
  21. Simplicity or complexity?
  22. 6N16B Aikido
  23. How to test a power supply
  24. Buying tubes in Bulgaria
  25. Input Trafo MFG reviews needed
  26. A cautinary tale.
  27. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  28. ecc99-2a3:opinion
  29. Triode troubles
  30. Safe PSU capacitor values for old Dyna amp?
  31. KT88, 6550 SE Triode Strapped Performance.
  32. Dynaco A431 OPTs
  33. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  34. SST-70 w/KT-150's mono's build
  35. Error Correction?
  36. Tube amp issue
  37. 4x6N3 preamp board from ebay
  38. time delayed LED for heater
  39. Aikido PSU decisions
  40. coupling caps for RCA rebuild
  41. Recommended coax
  42. Adding solid state bass to valves
  43. Incompatibility between Aikido Pre and Tubelab SimpleSE
  44. What power amp design would suit Esoteric MG-20?
  45. PL36 (triode) SE
  46. Any thoughts on this?
  47. BAT VK 55 paralleled
  48. Looking for a good phono preamp schematic.
  49. Nice diy from Poland
  50. Unballancer humming in one channel
  51. 6S19P tubes instead of 7233 tubes.?
  52. Looking for good stereo amp <$350 - help
  53. Question on EL84 SE triode with CCS at cathode
  54. Convert choke loaded 12b4 to CCS and retain od3's
  55. What can I make with these?
  56. 12AT7 LTP Calling Eli Duttman
  57. Book Help, Please?
  58. Amplifier class A EL34
  59. ps audio hybrid tube buffer
  60. Negative Feedback Amplifier with embedded Positive Feedback Booster
  61. Looking for a single ended amp.
  62. EF39 as 300B driver...
  63. How is Electro Harmonix 6922 sonicly compared to NOS?
  64. Tube amp driving a Subwoofer
  65. Leak Stereo 20 Power Supply Choke?
  66. help me read circuit: broski 300b shunt reg
  67. CCS current regulators for OP valves
  68. 1930's push pull field coil amplifier
  69. Loudness and power and volts
  70. Opinions; big mess or have potential?
  71. Star grounding
  72. High NFB OTL headphone amp
  73. Any technical advantages of almost floating grounds?
  74. Output transformer
  75. 12AU7 Tube Line Pre-amp on Ebay
  76. Would you run these at say 1200vdc?
  77. MOSFET equivalent
  78. 6BY5 GA full wave rectifier replacement
  79. ID those parts - trafo
  80. Sweeps in class A
  81. Preamp valve rectified power supply
  82. Grommes Precision S-35 - Worth playing with?
  83. 6922 or E88CC in the Rode NTK Mic
  84. What the hell caused this?
  85. 6SN7 Aikido White Follower - Spice simulation
  86. Need to build a moving coil stage
  87. You guys and gals recognize any of this equipment?
  88. Help with first amp design, SET no feedback hp amp
  89. LTSPICE problems with 10Y model
  90. 5876 tube
  91. Claus Byrith 4-30: missing valve in the PCB?
  92. KR T1610 PP amp building
  93. Pls Help me Identify these Tubes!
  94. measuring output transformer primary impedance
  95. Unusual output transformer Triad
  96. Input transformer differences
  97. Faint buzz through power stage (845)
  98. Pros and Cons of 3rd Stage in SE (6AV5/2A3 drive requirements)
  99. Star grounding - wooden box
  100. R601P Tube Radio
  101. analog metric el34 se amp
  102. EL34 PP amplifier suggestions
  103. 6AU6 Triode Mode
  104. Another GM70
  105. newbie amp question.
  106. Push-Pull Plate Choke from Edcor?
  107. Finalizing 300B Amps==Please Comment
  108. Help!!!
  109. Controlling gain in VA stage
  110. 833 Push Pull Design
  111. restoring mullard valve paint
  112. Mentmore TVA1
  113. DIY in Korea?
  114. Case suggestions for Pye Black Box?
  115. help trouble shooting a problem
  116. Liteaudio 1s37 Phono preamp
  117. All DHT tube amp dream
  118. Suggestion for valve amp kit
  119. Why are directly heated rectifiers still popular?
  120. Headphone amp with pre out
  121. wish to buy 10's or other tungsten DHT's
  122. Audio Innovations Series 300 II -red plate
  123. 811 heater power supply...
  124. Bijou schematics question (PINs)
  125. Looking for a proficient tube tech in New England.
  126. hybrid amplifier using EF86
  127. Looking in San Diego....
  128. Ground of tube headphone amp
  129. Input Transformer Question
  130. Low imp tube headphone diy amp
  131. Cathode Follower as DAC Output Stage?
  132. Monoblock Gu-50 help.
  133. Aikido CF question
  134. Tube Power Amp Kit Recommendations
  135. EL34,KT66,6L6GC,KT77:who works better with high impedance OT load in SE Triode Mode?
  136. ECC40 Voltage Question
  137. Question re DC coupling vs RC coupling (AC)
  138. Measuring ripple in filament supply (coleman reg)
  139. What about use largest possible capacitor as interstage decoupling ( 1 or 2uf)
  140. replace 6N3 tube preamp with mullard E555L
  141. Preamp to Poweramp tube proximity/spacing?
  142. List of Tube Noise Measurements - please nominate lowest noise tubes
  143. Just for interest
  144. Time to build the big one.
  145. Opinion? Would the input/driver from a HK-5 be good to replace original Mk3 ft. end??
  146. Has anyone built this kit?
  147. mu-follower with output transformer?
  148. ECC81 double triode tubes flashed brightly when switched on.
  149. pre amp with tone controll
  150. Making own hifi tube amp from scratch!!
  151. Pentode CCS as a load for long tailed pair?
  152. E88CC & 6N23P plate voltage range?
  153. First pre phono design [newbie]
  154. Struggling with LTspice - How to use .inc to get a tube to appear
  155. Eico St 40
  156. ECC88 Input/driverstage for F4 amp
  157. Tube headphone amp
  158. Acquired free brand new Jolida 302a
  159. Help with restoration of Audio Research equipment
  160. Grommes 103gt tuner
  161. Frank’s 6SN7 pre & regulated supply
  162. Sleeping giant
  163. hum by mounting powertransformer and tubes on same chassis
  164. Rectifier tube overheating
  165. "World's Best Technical Master Craftsmen"
  166. OPT for 2A3
  167. getting rid of pre amp in a tube amp
  168. A question on OPT and no loads.
  169. Auto-Bias vs Manual bias vs EFB
  170. Russian receiving tubes and foreign equivalents
  171. B+ delay timer module
  172. Testing DIY triodes
  173. Adding a dummy load to prevent amp from being damaged by having no load?
  174. 30 watt class A chopper controlled bias with 6 EL84
  175. Input resistor (What are purposes?)
  176. Posted new 300B push-pull amp design
  177. Help me source a pair of OPT for Knight KG-240 tube amp
  178. Help Pick Transformers for EICO HF-87
  179. PreAmp
  180. Original price of the Conrad Johnson PV-5
  181. balance pots in Williamson driver stage
  182. Another Question on Tektronix Transformers
  183. Philco K1629 Upgrade Options
  184. My return to tubes, via headphones - what circuit would you recommend?
  185. High Quality EL84 UL SE Amplifier
  186. regulated supply to CCS plate load
  187. Twin Audio Sinfonia Preamp
  188. ecll800 schematic confusion
  189. 6L6 recommendations
  190. tube 100th
  191. Luxman OY15-5k OPT?
  192. Has anyone had experience with Russian 5C8S and 5C9S?
  193. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  194. EL 84 pp amp - simple regulated circuit sought
  195. Any tube amp to drive B&W 802D?
  196. New to valve amplifiers
  197. SE 6GW8 output transformer with 5 wires.
  198. Mr.Curwen's single ended adventures
  199. Tube magic eye with em84-sensitivity?!
  200. Tube test
  201. Brimar 6V6 USSR
  202. World Design KT88 Kit
  203. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  204. Clone X10D problems distortion / saturation ... help!
  205. 12DW7 or 12AU7+12AX7 if stereo?
  206. First preamp and gain control
  207. Tube life..
  208. Berman 76 preamplifier, I need some advice please
  209. Old Tube amp missing tubes. HELP
  210. Going to Berlin, looking for electronics diy shops
  211. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  212. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  213. Help with Eico ST70
  214. Class-D and Tube buffer/preamp off same 12V SLA?
  215. Gu50 or 1624 PP amp first trials
  216. cathode follower driver A2
  217. High Pass Filter for OTL headphone Amp
  218. Bewitch 6550 Balance Issue
  219. ground hum issues in an old peak st-100
  220. Need an APPJ PA0901A Mini Amp Output Transformer.
  221. VTL Tiny Triode Schematics?
  222. A question of dynamics: Amplifier design?
  223. Rechargeable battery for cathode bias: open discussion
  224. High quality tube socket for 4P1L tube ?
  225. VTL Schematic needed
  226. Diode rating for filament voltage doubler
  227. SE vs PP for SET amps
  228. Use "mu output" from depletion mode MOSFET load?
  229. GM70 SE mov rectifiers
  230. First Preamp build
  231. Fisher KX-200 driving a pair of ESL from the plates
  232. Disadvantages of unbalanced tube
  233. The anatomy of a vacuum toob
  234. Valve Amplification Company CLA1 mkii help
  235. leak stereo 20 channel imbalance
  236. Mains powered 20W submin bridge amp
  237. SS rectification ST70
  238. K-12g ultra fast diode mod UF4007
  239. WE46c..
  240. 10 Pin B10A socket
  241. RIAA network adjustment
  242. audio research sp16
  243. Visiting Japan
  244. "up-rating" power filter chokes
  245. Differential pair gain/ where to apply feedback
  246. EL84 ECC83 SE Amp schematic
  247. high B+ voltage drop
  248. Volume control chip
  249. Signal Ground
  250. New to 6DJ8 tube

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