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  1. Lamm clone
  2. Zobel RC network and stability of GNF SE amplifier
  3. Screen driven 6KD6 SE
  4. Comments about regulators
  5. Rolling 6C33
  6. Crazy B+ Issue???
  7. Psvane EL34PH replica - reliability?
  8. Help designing regulated power supply
  9. Tube wiring guide line
  10. Chassis earth and ground
  11. 7868 to 7591
  12. Maximum Screen Voltage for Triode Strapped 1625 or 837
  13. AT-50 British transmitting triode
  14. Problem with power tubes
  15. A 6Y6 Push Pull amplifier
  16. Testing
  17. 6CG7 Hybrid Tube Headphone Amp
  18. Choke On The Output Of A Tube Amp
  19. 6n3p buffer?
  20. 4P1L vs 4P1S
  21. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  22. "La Luxuriante" R120 SE amplifier
  23. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  24. Looking For Some Help
  25. Audio dummy load
  26. Custom-made transformers in USA
  27. Etude - Amplifier for study
  28. Can you mix glow tubes and zeners for shunt regs?
  29. tubes4hifi - Amplifier Sound, other kits?
  30. Suggest source for inexpensive chassis for tube amp project?
  31. Reverse Tube Regulator?
  32. Leak Stereo 20 Problem
  33. Choke for 6v6 lacewood amp.
  34. Output Tube Options for Scott 399
  35. ST-35 Z565 Output Transformer Troubles?
  36. Point to Point Wiring Tube Preamp
  37. Siamese RG-6
  38. Gz34 rectifier with dc heater
  39. line preamp
  40. A bit of help with my phono preamp
  41. Aikido Cascode Preamp build
  42. Can EL34 replace KT88?
  43. Current Draw of CJ ART??
  44. Square wave overshot=worm sound?
  45. Band pass filter for tube amps
  46. Screen drive and the 6AG9
  47. Cleaning odd potentiometer
  48. Removing a Jolida 502 Balance Control
  49. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  50. Marantz 8 blowing fuse
  51. A newbie question about 12AX7 tube
  52. Web resources
  53. Transformer Shrouding - Purpose/Effectiveness
  54. current source
  55. KT88 Schematic - please help
  56. 105C to 85C Capacitors in Cheap Chinese Preamp
  57. Need help with plate CCS in 6EM7
  58. Need help on replacing Cap on Marantz 8
  59. Transformer for 12ax7 B+ calculation
  60. First amp build, advice and thoughts encouraged!!
  61. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  62. Luxman CL36, schematic
  63. Help with input impedance
  64. phono sp16
  65. Looking for a 20W amp schematics
  66. Ruggedized tube construction?
  67. Quicksilver full function preamplifier
  68. Another variants of using PCB from Ebay
  69. Valves very close each other...
  70. HF valve amp?
  71. Eico ST70 construction manual...
  72. Audio Research $30 FET!
  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. Sensing current in high voltage DHT circuits.
  138. Have you tested if two coupling capacitors in parallel are better than one sonically?
  139. DHT filament circuits - best wirewound resistors?
  140. Dual Pentode as two seperate Pentodes.
  141. Double "C" core OPT question
  142. EL34 pentode to triode feedback
  143. Chinese 7308?
  144. DC coupled circuits
  145. Need a complete amp kit for newbie
  146. Making a tube amp
  147. Tube amp diode question
  148. Michaelson Chronos
  149. Preamp question
  150. 6SJ7 and 6SC7 not on roll chart
  151. Graaf GM20 6C33
  152. Does Ultra-Linear SE reduce harmonic distortion?
  153. How to use a 3 prong plug with a Dynaco MkIII?
  154. 6e5-6e6 tube-operating point-absolute maximum rating
  155. LIFePO4 battery cathode bias
  156. Audible Illusions Modulus 3A CD input resistor values
  157. Insulation for component leads in point to point wiring
  158. Advices on first tube amp
  159. 300B Tube Shootout
  160. Unison reasearch Mystery One
  161. 4P10C or 4Π10C tube, any member familiar with?
  162. Largest decoupling cap (DC block on signal path)
  163. Control Grid Feedback (as opposed to Cathode FB) and Miller Capacitance
  164. 211 / 845 ccs?
  165. Eimac 35T any good for an amplifier?
  166. What speaker impedance for a 5 ohm amplifier
  167. Almarro A318B SET Amplifier Simple Modifications For Improved Performance?
  168. Hammond interstage
  169. Bias Arrangement
  170. question about connecting my tube amp to a receiver
  171. Pentode screen bypass capacitor
  172. MINGDA MC845 AA schematics
  173. Faulty Output Transformer
  174. The makings of a nice SEP amp from an audio oscillator?
  175. Audio pot with tap
  176. tube amp and jbl crossover connection
  177. SE EL84 high screen and plate
  178. Marantz 7 line stage with DAC
  179. help with Ecc82/12AU7 selection
  180. Kt88's and 6SN7's?
  181. KR T-1610: What can I do with it?
  182. Schematic
  183. Determining primary output load resistance...
  184. Warning about chokes by Toroidy
  185. Looking af new 845
  186. 807 Amplifier build.....Help Wanted
  187. Claus Byrith 4-30 - HELP !
  188. LR8 as CCS for small tube cathode follower?
  189. Tektronix 120-086 transformer
  190. 01A question
  191. Determining input impedance
  192. Plate to cathode feedback
  193. Quick question about EL84 PSE
  194. P-SET EL34
  195. 6v6 Preamp Explorations
  196. Monoblock kits for $500
  197. Wanted/Needed Vaic Valve / KR 52B etc.
  198. Measuring Rp on the bench
  199. Clarifying RIAA calculations
  200. Emissions Labs 5U4G use statements
  201. Help me pick my first tube kit/winter project (tube preamp)
  202. Please explain feedback to an ignoramus
  203. Op-Amp/Power tube integration
  204. 12b4a preamp project
  205. Pot to Stepping and ohmic value change
  206. McIntosh MC2000
  207. universal high-gain pre-amp useful ?
  208. 6AX5, the forgotten rectifier?
  209. High gain pentode LTP?
  210. question with heater wiring
  211. Ideas for an hi-fi mono amplifier (and preamplifier)
  212. humm and buzz
  213. ECC88 For LTP
  214. Polam / Telam tubes !
  215. Question about grid input signal voltage
  216. Douk EL34 Amp kit
  217. ID help Please Hammond Amp
  218. rolling ecc88 into a 6cg7 socket
  219. Article Wanted - "High Quality Amplifier with the 6AS7G" by McProud
  220. capacitors
  221. Need a little WE 597A help
  222. Need to find - Triode Va=500V, Mu=20
  223. The Pomato, A hybrid can amp
  224. audio research sp16 phono no rec
  225. Recovered smoother Caps (to use or not)
  226. Effect of raising and lowering B+
  227. Ideas for tube amp EL34/ECC83 single ended
  228. The HiFi show 2015 UK
  229. Coupling capacitors
  230. Brook 12A
  231. Importance of plate voltage on overall performance
  232. Help Precision Fidelity M-7 amp
  233. And so it begins...
  234. What is the cream of the crop for DIY tubes kits?
  235. Amplifier Build - Suggestions
  236. 26DQ5 curves pin out
  237. Toroidal Transformer Upgrade for S5 Electronics K-16LS Kit
  238. VR tube RF issues
  239. usb and 3.5 to same pre
  240. Gain changing on 6n3 tube buffer
  241. Kelvin Capacitors
  242. simple question about on off switch
  243. Engineers Amp chassis
  244. First tube amp design, what are my mistakes?
  245. US 6L6GC identification
  246. PL508 triode curves, help !!!
  247. Multiple gain stages without continually increasing B+
  248. Choke and Capacitor input filters on a same winding?
  249. Any advice value for Volume control if....
  250. For tube lovers-Henry Wolcott Amplifiers from JBL PL100

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