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  1. Power supply 500v
  2. Anyone use 816 mercury vapor 1/2 wave rec tube
  3. Lamm clone
  4. Zobel RC network and stability of GNF SE amplifier
  5. Screen driven 6KD6 SE
  6. Comments about regulators
  7. Rolling 6C33
  8. Crazy B+ Issue???
  9. Psvane EL34PH replica - reliability?
  10. Help designing regulated power supply
  11. Tube wiring guide line
  12. Chassis earth and ground
  13. 7868 to 7591
  14. Maximum Screen Voltage for Triode Strapped 1625 or 837
  15. AT-50 British transmitting triode
  16. Problem with power tubes
  17. A 6Y6 Push Pull amplifier
  18. Testing
  19. 6CG7 Hybrid Tube Headphone Amp
  20. Choke On The Output Of A Tube Amp
  21. 6n3p buffer?
  22. 4P1L vs 4P1S
  23. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  24. "La Luxuriante" R120 SE amplifier
  25. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  26. Looking For Some Help
  27. Audio dummy load
  28. Custom-made transformers in USA
  29. Etude - Amplifier for study
  30. Can you mix glow tubes and zeners for shunt regs?
  31. tubes4hifi - Amplifier Sound, other kits?
  32. Suggest source for inexpensive chassis for tube amp project?
  33. Reverse Tube Regulator?
  34. Leak Stereo 20 Problem
  35. Choke for 6v6 lacewood amp.
  36. Output Tube Options for Scott 399
  37. ST-35 Z565 Output Transformer Troubles?
  38. Point to Point Wiring Tube Preamp
  39. Siamese RG-6
  40. Gz34 rectifier with dc heater
  41. line preamp
  42. A bit of help with my phono preamp
  43. Aikido Cascode Preamp build
  44. Can EL34 replace KT88?
  45. Current Draw of CJ ART??
  46. Square wave overshot=worm sound?
  47. Band pass filter for tube amps
  48. Screen drive and the 6AG9
  49. Cleaning odd potentiometer
  50. Removing a Jolida 502 Balance Control
  51. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  52. Marantz 8 blowing fuse
  53. A newbie question about 12AX7 tube
  54. Web resources
  55. Transformer Shrouding - Purpose/Effectiveness
  56. current source
  57. KT88 Schematic - please help
  58. 105C to 85C Capacitors in Cheap Chinese Preamp
  59. Need help with plate CCS in 6EM7
  60. Need help on replacing Cap on Marantz 8
  61. Transformer for 12ax7 B+ calculation
  62. First amp build, advice and thoughts encouraged!!
  63. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  64. Luxman CL36, schematic
  65. Help with input impedance
  66. Looking for a 20W amp schematics
  67. Ruggedized tube construction?
  68. Quicksilver full function preamplifier
  69. Another variants of using PCB from Ebay
  70. Valves very close each other...
  71. HF valve amp?
  72. Eico ST70 construction manual...
  73. value in humour
  74. "rejuvenate" oxide cathode
  75. el84 se amp layout
  76. the grand return. 3d21A triode PP
  77. How did receiving valve manufacture compare to the LHC ...
  78. Classi RIAA preamp questions
  79. Max input voltage with negative feedback in place?
  80. Is there a 9-pin mini equivalent of 6AU6?
  81. Which DHT tube, mu>30 driver duty
  82. LTP and H3 distortion
  83. Schematics for Bendix 6384
  84. Has anybody compared distortion profiles of their amp designs?
  85. Dynacord transformer sparks flying
  86. Why this exists?
  87. Help with strange valve project:)
  88. help with these transformers please
  89. Bias a heater supply with humdinger?
  90. Question About Isolating Grounds
  91. How close is close enough for setting bias?
  92. Vitamin Q or Auricaps for coupling...any opinions?
  93. High current from EL84 measured on tubetester
  94. Power supply design for my preamp
  95. How do I get USB input into a tube amp?
  96. Janus Shunt Regulator / Aikido Octal build
  97. 6SN7 or 12AU7 Tube preamp for Gainclone
  98. E-Linear, P-P pentode application
  99. 6n6p preamp. Does it look ok?
  100. www.grippeaz.com
  101. Capacitance value help
  102. 6C33 SVETLANA in 1979??
  103. FYI: MCM 555-7125 Transformer Info
  104. Anyone use 39/44 for audio?
  105. I think its about time for me to design my first Transformer tube amp..
  106. Q: EL84 PP - Bias switch, PS regulation
  107. Balanced to unbalanced converter solution with only one dual triode?
  108. ECL85 G1+G2 Driven Amp Concept - Worth Pursuing?
  109. What is this called? "Triode with active load"?
  110. Type 50 triode amp
  111. Triode strapped C3G
  112. Newbie looking for first tube project. Maggie 9308 or like suggestions?
  113. Poindexter's Musical Machine:Tube Power Supply Schematic
  114. SE EL34 cathode help ?
  115. How to add "Vu-Meters and "Subwoofer Out" to a tube amp...
  116. Audio Research D90... a HOT, buzzing amplifier
  117. Lundahl LL1670 grid choke -- One or two needed for push-pull?
  118. At this stage of my experience almost too afraid to ask
  119. Help with EM7 circuit
  120. Ceramic or plastic noval socket
  121. Need connection info for Thordarson 22S86
  122. Harmon Kardon A500 Redux
  123. Schematic for 2A3/300B SET OTL amp
  124. Bias circuit for fixed bias
  125. Ultrapath with cathode bypass cap: which value of C is correct?
  126. Volume Control Tube Amp / Graaf Graafiti WFB one
  127. Pultec EGP-2 control pannel
  128. Emission values?
  129. Capacitor Upgrade for S5 Electronics (16LS)
  130. 'nipple' in waveform - What is it?
  131. High impedance speaker for SET OTL amps.
  132. Uneven output from LL1677
  133. Ugh. Need help with hum
  134. 6H16B plate follower output stage
  135. Tube preamp 30 gain design with 12ax7
  136. Operating points for 6n2p
  137. Have you tested if two coupling capacitors in parallel are better than one sonically?
  138. DHT filament circuits - best wirewound resistors?
  139. Dual Pentode as two seperate Pentodes.
  140. Double "C" core OPT question
  141. EL34 pentode to triode feedback
  142. Chinese 7308?
  143. DC coupled circuits
  144. Need a complete amp kit for newbie
  145. Making a tube amp
  146. Tube amp diode question
  147. Michaelson Chronos
  148. Preamp question
  149. 6SJ7 and 6SC7 not on roll chart
  150. Graaf GM20 6C33
  151. Does Ultra-Linear SE reduce harmonic distortion?
  152. How to use a 3 prong plug with a Dynaco MkIII?
  153. 6e5-6e6 tube-operating point-absolute maximum rating
  154. LIFePO4 battery cathode bias
  155. Audible Illusions Modulus 3A CD input resistor values
  156. Insulation for component leads in point to point wiring
  157. Advices on first tube amp
  158. 300B Tube Shootout
  159. Unison reasearch Mystery One
  160. 4P10C or 4Π10C tube, any member familiar with?
  161. Largest decoupling cap (DC block on signal path)
  162. Control Grid Feedback (as opposed to Cathode FB) and Miller Capacitance
  163. 211 / 845 ccs?
  164. Eimac 35T any good for an amplifier?
  165. What speaker impedance for a 5 ohm amplifier
  166. Almarro A318B SET Amplifier Simple Modifications For Improved Performance?
  167. Hammond interstage
  168. Bias Arrangement
  169. question about connecting my tube amp to a receiver
  170. Pentode screen bypass capacitor
  171. MINGDA MC845 AA schematics
  172. Faulty Output Transformer
  173. The makings of a nice SEP amp from an audio oscillator?
  174. Audio pot with tap
  175. tube amp and jbl crossover connection
  176. SE EL84 high screen and plate
  177. Marantz 7 line stage with DAC
  178. help with Ecc82/12AU7 selection
  179. Kt88's and 6SN7's?
  180. KR T-1610: What can I do with it?
  181. Schematic
  182. Determining primary output load resistance...
  183. Warning about chokes by Toroidy
  184. Looking af new 845
  185. 807 Amplifier build.....Help Wanted
  186. Claus Byrith 4-30 - HELP !
  187. LR8 as CCS for small tube cathode follower?
  188. Tektronix 120-086 transformer
  189. 01A question
  190. Determining input impedance
  191. Plate to cathode feedback
  192. Quick question about EL84 PSE
  193. P-SET EL34
  194. 6v6 Preamp Explorations
  195. Monoblock kits for $500
  196. Wanted/Needed Vaic Valve / KR 52B etc.
  197. Measuring Rp on the bench
  198. Clarifying RIAA calculations
  199. Emissions Labs 5U4G use statements
  200. Help me pick my first tube kit/winter project (tube preamp)
  201. Please explain feedback to an ignoramus
  202. Op-Amp/Power tube integration
  203. 12b4a preamp project
  204. Pot to Stepping and ohmic value change
  205. McIntosh MC2000
  206. universal high-gain pre-amp useful ?
  207. 6AX5, the forgotten rectifier?
  208. High gain pentode LTP?
  209. question with heater wiring
  210. Ideas for an hi-fi mono amplifier (and preamplifier)
  211. humm and buzz
  212. ECC88 For LTP
  213. Polam / Telam tubes !
  214. Question about grid input signal voltage
  215. Douk EL34 Amp kit
  216. ID help Please Hammond Amp
  217. rolling ecc88 into a 6cg7 socket
  218. Article Wanted - "High Quality Amplifier with the 6AS7G" by McProud
  219. capacitors
  220. Need a little WE 597A help
  221. Need to find - Triode Va=500V, Mu=20
  222. The Pomato, A hybrid can amp
  223. Effect of raising and lowering B+
  224. Ideas for tube amp EL34/ECC83 single ended
  225. The HiFi show 2015 UK
  226. Coupling capacitors
  227. Brook 12A
  228. Importance of plate voltage on overall performance
  229. Help Precision Fidelity M-7 amp
  230. And so it begins...
  231. What is the cream of the crop for DIY tubes kits?
  232. Amplifier Build - Suggestions
  233. 26DQ5 curves pin out
  234. Toroidal Transformer Upgrade for S5 Electronics K-16LS Kit
  235. VR tube RF issues
  236. usb and 3.5 to same pre
  237. Gain changing on 6n3 tube buffer
  238. Kelvin Capacitors
  239. simple question about on off switch
  240. Engineers Amp chassis
  241. First tube amp design, what are my mistakes?
  242. US 6L6GC identification
  243. PL508 triode curves, help !!!
  244. Multiple gain stages without continually increasing B+
  245. Choke and Capacitor input filters on a same winding?
  246. Any advice value for Volume control if....
  247. For tube lovers-Henry Wolcott Amplifiers from JBL PL100
  248. Help translate stamp mark on russian tube
  249. UK Engineers Amp (my first project)
  250. 12AX7 Heater pin 9

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