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  1. where to get good 5AR4 's
  2. Greetings from ETF!
  3. 26 Preamp, Kennedy Version 3
  4. Roederstein replacements?
  5. Playin' with feedback
  6. schematic yaqin cd1 tube buffer
  7. Tubelab Simple SE questions
  8. tube preamp
  9. Filament current bias
  10. What Transformer is better ??
  11. DC-coupled CF driver pentode help!
  12. HHScott Forum?
  13. Delay relay
  14. Amp Gain Design Philosophy
  15. Greetings - Watt Calculation
  16. AES Chocolates?
  17. Power supply filters - sim results
  18. Q............PP Ultrapath
  19. formula help
  20. DAC -> Amp with parallelled E182CC and Lundahl transformers -> 8ohm headphones
  21. Need an HV trafo? Try these:
  22. Driver for Musical Fidelity 550K
  23. Yaqin MC-10l
  24. help with 2 stage cathode follower
  25. B&K 747 tube tester
  26. Screen glowing?
  27. Grid 2 voltage affects
  28. Simple Tube Mono Block Tube Amp Schematic
  29. Optimizing a 807 PP amplifiers input stage and phase splitter...
  30. Chassis Layout Advice
  31. strange Stromberg Carlson
  32. lifting the earth
  33. passive xover w/ SET?
  34. Low gain tube amp?
  35. What to do with these parts?
  36. Regulated Heater on the 6SN7 Aikido Plate to Heater question
  37. SRPP with buffer - 1MOhm impedance?
  38. PSUD2 & g2 on 807 problem..?
  39. 230V transformer for a 832 PP project
  40. Mercury vapour rectifier for George
  41. Replacing 6L6 with 6V6: what changes needed?
  42. 4 tube line level pre?
  43. Tube Hybrid Amp Gain Calculation
  44. transformer coupled plate follower
  45. What does your system look like?
  46. Cascoding tubes
  47. Advice with modification of Beard power amp
  48. Harman Kardon TA5000-X power XFMR
  49. This happens when you hire a good designer.
  50. Test & Measurement interface for Soundcard
  51. 1st Pass at 1st Phono Preamp; Comments?
  52. Transformers to try.
  53. Hum in phono pre - help please
  54. Output transformer cores
  55. Output transformer cores
  56. Presonus Bluetube makeover
  57. Tube Amp Channel Switching
  58. physically small twin triode tube
  59. Tubelab SE 2A3 _ Newbie question.
  60. TJ Full Music Factory Tour Now Online
  61. where to find cool vol control knobs?
  62. $200 6V6 Amp
  63. Audio Research Reference Phono, anyone?
  64. Review of Suppo Audio's first offering - EL84 Push Pull
  65. 6n23p(-ev)
  66. Akikido LSA/HPA 9-Pin or Akikido Octal which one?
  67. TUBE AMP 1946 worth grabbing?
  68. SE Newbie wants to go level 2
  69. Where To Purchase Tube Amp Parts in the UK
  70. The soul of a new "electrostatic" machine
  71. Transformer question
  72. 6021 phono pre-amp
  73. How to design input stage with specific input impedance/pot value
  74. Simple SE Grounding Question
  75. James OPT connections?
  76. DIY rtp5 help please?
  77. SS Followers to drive power tubes
  78. Sophia Electric EL34 Schematic
  79. DRD amplifier with CCS?
  80. Phono Preamp
  81. Dynaco ST-70 with a GSI board, Parts diagram and any info PLEASE
  82. transistor AC blocker
  83. PL519 Source
  84. Identify this mullard
  85. Suppo Audio -- New Chinese EL84 PP amp for CHEAP.
  86. Beard p35mkII schematics/photo photo
  87. Bias transformer question
  88. Anyone deliberately dial in 2nd harmonic?
  89. What is the sonic impact of SS CCS in tube equipment
  90. Phase help
  91. El34-kt88
  92. Transconductance amplifier based on hybrid cascode
  93. Chinese 6Z4, also those regulated supplies.
  94. Audion Reference restoration
  95. Anyone try a regulated PS in an Ultrapath preamp?
  96. Source for Resistor sets?
  97. High Zout tube preamps with ss power amps.
  98. PSUD II soft start
  99. About the 6AU6s
  100. Audio Note line preamp question
  101. EL34 SE amp schematic
  102. looking for 12AT7 / ECC81 phase splitter
  103. 6AS7 getting rare?
  104. How to power up a new Build the first time
  105. power transformer for a 2a3se amp!
  106. 6DJ8 Tube Phono and Line Preamp
  107. ST-35 Build Using PC13 Boards Questions and Thoughts
  108. My new hybrid full single ended amplifier project on going
  109. Punch tools for making metal top plates on amps
  110. antique sound lab AQ1009-845 interstage transformer replacement
  111. The search for the ultimate 6SN7
  112. Looking for a good part web store
  113. Need your advice for tube amp case
  114. Questions about grounding
  115. power supply
  116. Strange idea for an output stage - comments requested
  117. Please comment on this EL84 PP design
  118. 1.5VDC Heater Supply For #26!?
  119. Looking for 300B or 2A3 design suggestions......gearing up for a new project
  120. original philips AD-9058
  121. Bench test equipment, What's yours?
  122. Tube Lab SE Problem
  123. Tube Socket help, I'm looking at a few, but not sure which material to buy?
  124. Sweep tube info/specs
  125. Help for Tango 300b amp
  126. vacuum tubes type 10 and UX201A
  127. 6DQ5 specs for audio
  128. r-core output transformers...
  129. Isolation Transformer Question
  130. Buffer question?
  131. Two positive rails from a center-tapped transformer?
  132. Help reqd - 115V PTX on 230V
  133. Replacing the cathode resistor with a current source in SE ?
  134. First 300b Design, Please comment
  135. 6AX4 datasheet question
  136. Bias Drift
  137. Recommend me a tube...
  138. What happens when Heater Cathode voltage is exceeded?
  139. HELP Schematics for RL 12 T 15
  140. Phono Stage
  141. TEE Vee Tube fans' SE Cf Amp
  142. Yaqin MC-10L losing volume
  143. Pl84 tubes
  144. AnalogMetric 6L6GC SE amp kit...thoughts about this kit?
  145. 5150 or slo 5-50w clone
  146. ECC88, warm up time
  147. Yaqin MC-10L Heater Voltage
  148. 6c33 otl amblifier
  149. self-oscillation in Dynaco ST-70
  150. computer tube tester
  151. Troubleshooting the decware se84 kit
  152. 6L6 PP problem
  153. First try at an Eagle Schematic/board
  154. opinions on decware zen kit
  155. Powerdrive for PP amp with local feedback and pentode driver ?
  156. having trouble calculating transconductance
  157. Philips console unit with reverb!
  158. 300BSET with Kimmel style mu driver ?
  159. Testing Mullard 12AU7 on Hickok 600A
  160. EL34/6CA7 driven 300B Schematics
  161. C450 Radio Craftsmen info needed
  162. Tubelab Simple SE v.2
  163. Magnetic shielding with aluminum
  164. lampizator dac
  165. AES is At It Again...
  166. Se Amp with Push Pull Transformer
  167. 6550 which breed can take the flog ?
  168. Chassis Question
  169. EL82 in triode with silverstepper (TVC)
  170. Joined the 12b4 line stage club. And worth it!
  171. ECL86/PCL86 Schematic
  172. Ambient temperature and tubes
  173. Vintage output transformers
  174. -ve grid voltage
  175. Ming Da MC-3008-A2 Mono Blocks
  176. V-Reg, Gyrator, Low (relative) voltage tubes
  177. Simple Tube amp
  178. Jolida 502A replace power switch
  179. Tubelab build selector switch question
  180. tubes supplier
  181. RadioDaze out of the tube business
  182. 8000+ hours on my Simple SE
  183. C-L-C-parallel-R-C
  184. musical power supplies
  185. Trimpots sound better than equivalent resistors for biasing?
  186. Anyone have a simple circuit for . .
  187. PP Tube Biasing, how good is good enough?
  188. Aesthetics
  189. Point to point, from scatch build of the K-12G
  190. What 6550 for Conrad MV75
  191. Motorboating phono input on Stromberg Carlson ASR433
  192. Pioneer sr-101
  193. 6AU6 in Push Pull: Opinions please
  194. Audionote M7 and Foreplay III
  195. vintage triode
  196. Help with design review wanted
  197. 6J52P pentode driver?
  198. a gutar amp I built
  199. Looking for a good valve preamp
  200. Anyone try the "Hazen mod" to G3 supressor grid
  201. 6L6GC -Which Shuguang can take the Heat?
  202. Using Toroidal PTs as tube OTs - methods and sources
  203. With a little help... KT88 PP UL Amp
  204. TechTube Featured In November AudioXpress
  205. Yaqin MC-100b channel imbalance
  206. Regulated Tube Preamp question
  207. Has anybody purchased from Mable Audio?
  208. PS voltage changes after capacitor replacement
  209. Non-magnetic bolts that hold an output transformer together
  210. Audio Innovations Series 500 Rewire
  211. Which audio electrolytics in tube voltages -- Your comments please !
  212. Some general opt questions.
  213. Looking for ANYTHING on the Audioromy 838 w/805A Tube..
  214. modifying zenith 7d31 amp console
  215. Questions on JE Labs transformer coupled line stage
  216. Onix/Melody SP3 Upgrades and Mods
  217. Motorboating with Regulated Supply
  218. 27 & 6SN7 Preamp - Crossover
  219. Budget 2A3?
  220. first go at design - pp
  221. Tube Amp for MP3 Player
  222. Sonic signatures of KT88, 300B, 805, 845 in SET & PP Configurations
  223. Building the Baby Huey EL84 pushpull amplifier
  224. Tube Voltage Regulator, Is it worth the effort?
  225. Best tubeamp for metal, tight bass
  226. Donor stereo 845 amp- now what!?
  227. "Optimal" output grid loading?
  228. wax poured out!
  229. Yet another do-nothing tOOb hack.
  230. What is a CCS - how do you design one?
  231. Strange Aikido problem when home power fluctuates
  232. Need to regulate 450v --> 300v
  233. new to the forum and looking for el86 info
  234. Why not invert the Tubelab SE board?
  235. Steve Bench Crossover Questions
  236. Audio Note M7 - 7F7 CCS
  237. Anyone have schema for katodcoupled 6C33 P-P?
  238. Ltspice and Valve models
  239. VTV Push-Pull 6SN7/KT88 Amp: DIY or China?
  240. How to identify type of bias used for my tube amp
  241. VR Tube Question
  242. Ampmaker Kits
  243. P-P with some muscle
  244. buzz w/ nothing plugged into inputs. Goes away once jacked in.
  245. CV6 / CV1135 / E1148 / VT232 VHF oscillator triode data
  246. HELP HELP HELP mesa rectifier
  247. simple se with source selector
  248. Measuring tube/component temperature
  249. Parallel Single Ended Amplifier Design using Acro TO-290s?
  250. Elevate heater trouble

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