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  1. Regulated PSU question
  2. please help me change this
  3. Stromberg-Carlson Identification Help
  4. pi filter variations
  5. How do I change this design from EL34 to 6L6?
  6. Sun Audio SV-300B MKII DIY
  7. 230-115V step down transformer earthing
  8. PP oscillation problem
  9. Wiring a DPDT for direct in & 2-100k mono pots ..?
  10. Arion "ADONIS" Schematics Request
  11. Phono Stage my first try
  12. Maximum gain with 6SN7 ?
  13. Rca 6md8
  14. Getting the DIYer blues again.
  15. EL34 B review Tung-Sol
  16. Please help with my first valve preamp ?
  17. power supply filter choke current rating.
  18. Will and Aikido Driver Stage work?
  19. Bottlehead Foreplay III improvements, suggestions, alternatives?
  20. DC modules fot DHT amps....too expensive to buy pre-built, why not DIY them?
  21. Load Resistance (Ra) question applied to OTs
  22. B&K 610 connector pinout
  23. 807 pp build project - whose in?
  24. where to buy dn2540 and 10m45 in UK
  25. ecc88 arcing at shutdown problem...
  26. Question - Output Trafo with CFB
  27. Valves' world
  28. Tube diode for cathode bias?
  29. Trying to get a response from TX maker.pass it on.
  30. Need help choosing a filament supply
  31. Motorola 3 channel Tube Amp from Console
  32. Most compact 90V power supply
  33. Decware output stage
  34. 50FE5-push pull stereo
  35. tamura f-7000 series
  36. Very simple high power single ended
  37. Which tubes are lowest noise?
  38. where to get good 5AR4 's
  39. Greetings from ETF!
  40. 26 Preamp, Kennedy Version 3
  41. Playin' with feedback
  42. schematic yaqin cd1 tube buffer
  43. tube preamp
  44. Filament current bias
  45. What Transformer is better ??
  46. DC-coupled CF driver pentode help!
  47. HHScott Forum?
  48. Amp Gain Design Philosophy
  49. Greetings - Watt Calculation
  50. AES Chocolates?
  51. Power supply filters - sim results
  52. Q............PP Ultrapath
  53. formula help
  54. DAC -> Amp with parallelled E182CC and Lundahl transformers -> 8ohm headphones
  55. Need an HV trafo? Try these:
  56. Driver for Musical Fidelity 550K
  57. Yaqin MC-10l
  58. help with 2 stage cathode follower
  59. Screen glowing?
  60. Grid 2 voltage affects
  61. Simple Tube Mono Block Tube Amp Schematic
  62. Optimizing a 807 PP amplifiers input stage and phase splitter...
  63. Chassis Layout Advice
  64. strange Stromberg Carlson
  65. lifting the earth
  66. passive xover w/ SET?
  67. Low gain tube amp?
  68. What to do with these parts?
  69. Regulated Heater on the 6SN7 Aikido Plate to Heater question
  70. SRPP with buffer - 1MOhm impedance?
  71. PSUD2 & g2 on 807 problem..?
  72. 230V transformer for a 832 PP project
  73. Mercury vapour rectifier for George
  74. Replacing 6L6 with 6V6: what changes needed?
  75. 4 tube line level pre?
  76. Tube Hybrid Amp Gain Calculation
  77. transformer coupled plate follower
  78. What does your system look like?
  79. Cascoding tubes
  80. Advice with modification of Beard power amp
  81. Harman Kardon TA5000-X power XFMR
  82. This happens when you hire a good designer.
  83. 1st Pass at 1st Phono Preamp; Comments?
  84. Transformers to try.
  85. Hum in phono pre - help please
  86. Presonus Bluetube makeover
  87. Tube Amp Channel Switching
  88. physically small twin triode tube
  89. TJ Full Music Factory Tour Now Online
  90. where to find cool vol control knobs?
  91. $200 6V6 Amp
  92. Audio Research Reference Phono, anyone?
  93. Review of Suppo Audio's first offering - EL84 Push Pull
  94. 6n23p(-ev)
  95. Akikido LSA/HPA 9-Pin or Akikido Octal which one?
  96. TUBE AMP 1946 worth grabbing?
  97. SE Newbie wants to go level 2
  98. Where To Purchase Tube Amp Parts in the UK
  99. The soul of a new "electrostatic" machine
  100. Transformer question
  101. 6021 phono pre-amp
  102. How to design input stage with specific input impedance/pot value
  103. James OPT connections?
  104. DIY rtp5 help please?
  105. SS Followers to drive power tubes
  106. Sophia Electric EL34 Schematic
  107. DRD amplifier with CCS?
  108. Phono Preamp
  109. Dynaco ST-70 with a GSI board, Parts diagram and any info PLEASE
  110. transistor AC blocker
  111. PL519 Source
  112. Identify this mullard
  113. Suppo Audio -- New Chinese EL84 PP amp for CHEAP.
  114. Beard p35mkII schematics/photo photo
  115. Bias transformer question
  116. Anyone deliberately dial in 2nd harmonic?
  117. What is the sonic impact of SS CCS in tube equipment
  118. Phase help
  119. El34-kt88
  120. Transconductance amplifier based on hybrid cascode
  121. Chinese 6Z4, also those regulated supplies.
  122. Audion Reference restoration
  123. Anyone try a regulated PS in an Ultrapath preamp?
  124. High Zout tube preamps with ss power amps.
  125. PSUD II soft start
  126. About the 6AU6s
  127. Audio Note line preamp question
  128. EL34 SE amp schematic
  129. looking for 12AT7 / ECC81 phase splitter
  130. 6AS7 getting rare?
  131. How to power up a new Build the first time
  132. power transformer for a 2a3se amp!
  133. 6DJ8 Tube Phono and Line Preamp
  134. ST-35 Build Using PC13 Boards Questions and Thoughts
  135. My new hybrid full single ended amplifier project on going
  136. Punch tools for making metal top plates on amps
  137. antique sound lab AQ1009-845 interstage transformer replacement
  138. The search for the ultimate 6SN7
  139. Looking for a good part web store
  140. Need your advice for tube amp case
  141. Questions about grounding
  142. power supply
  143. Strange idea for an output stage - comments requested
  144. Please comment on this EL84 PP design
  145. 1.5VDC Heater Supply For #26!?
  146. Looking for 300B or 2A3 design suggestions......gearing up for a new project
  147. original philips AD-9058
  148. Bench test equipment, What's yours?
  149. Tube Lab SE Problem
  150. Tube Socket help, I'm looking at a few, but not sure which material to buy?
  151. Sweep tube info/specs
  152. Help for Tango 300b amp
  153. vacuum tubes type 10 and UX201A
  154. 6DQ5 specs for audio
  155. r-core output transformers...
  156. Isolation Transformer Question
  157. Buffer question?
  158. Two positive rails from a center-tapped transformer?
  159. Help reqd - 115V PTX on 230V
  160. Replacing the cathode resistor with a current source in SE ?
  161. First 300b Design, Please comment
  162. 6AX4 datasheet question
  163. Bias Drift
  164. Recommend me a tube...
  165. What happens when Heater Cathode voltage is exceeded?
  166. HELP Schematics for RL 12 T 15
  167. Phono Stage
  168. TEE Vee Tube fans' SE Cf Amp
  169. Yaqin MC-10L losing volume
  170. Pl84 tubes
  171. AnalogMetric 6L6GC SE amp kit...thoughts about this kit?
  172. 5150 or slo 5-50w clone
  173. ECC88, warm up time
  174. Yaqin MC-10L Heater Voltage
  175. 6c33 otl amblifier
  176. self-oscillation in Dynaco ST-70
  177. Troubleshooting the decware se84 kit
  178. 6L6 PP problem
  179. First try at an Eagle Schematic/board
  180. opinions on decware zen kit
  181. Powerdrive for PP amp with local feedback and pentode driver ?
  182. having trouble calculating transconductance
  183. Philips console unit with reverb!
  184. 300BSET with Kimmel style mu driver ?
  185. EL34/6CA7 driven 300B Schematics
  186. C450 Radio Craftsmen info needed
  187. Magnetic shielding with aluminum
  188. lampizator dac
  189. AES is At It Again...
  190. Se Amp with Push Pull Transformer
  191. 6550 which breed can take the flog ?
  192. Chassis Question
  193. EL82 in triode with silverstepper (TVC)
  194. Joined the 12b4 line stage club. And worth it!
  195. ECL86/PCL86 Schematic
  196. Ambient temperature and tubes
  197. Vintage output transformers
  198. -ve grid voltage
  199. Ming Da MC-3008-A2 Mono Blocks
  200. V-Reg, Gyrator, Low (relative) voltage tubes
  201. Simple Tube amp
  202. Jolida 502A replace power switch
  203. tubes supplier
  204. RadioDaze out of the tube business
  205. C-L-C-parallel-R-C
  206. musical power supplies
  207. Trimpots sound better than equivalent resistors for biasing?
  208. Anyone have a simple circuit for . .
  209. PP Tube Biasing, how good is good enough?
  210. Aesthetics
  211. Point to point, from scatch build of the K-12G
  212. What 6550 for Conrad MV75
  213. Motorboating phono input on Stromberg Carlson ASR433
  214. Pioneer sr-101
  215. 6AU6 in Push Pull: Opinions please
  216. Audionote M7 and Foreplay III
  217. vintage triode
  218. Help with design review wanted
  219. 6J52P pentode driver?
  220. a gutar amp I built
  221. Looking for a good valve preamp
  222. Anyone try the "Hazen mod" to G3 supressor grid
  223. 6L6GC -Which Shuguang can take the Heat?
  224. Using Toroidal PTs as tube OTs - methods and sources
  225. With a little help... KT88 PP UL Amp
  226. TechTube Featured In November AudioXpress
  227. Yaqin MC-100b channel imbalance
  228. Regulated Tube Preamp question
  229. Has anybody purchased from Mable Audio?
  230. PS voltage changes after capacitor replacement
  231. Non-magnetic bolts that hold an output transformer together
  232. Audio Innovations Series 500 Rewire
  233. Which audio electrolytics in tube voltages -- Your comments please !
  234. Some general opt questions.
  235. Looking for ANYTHING on the Audioromy 838 w/805A Tube..
  236. modifying zenith 7d31 amp console
  237. Questions on JE Labs transformer coupled line stage
  238. Onix/Melody SP3 Upgrades and Mods
  239. Motorboating with Regulated Supply
  240. 27 & 6SN7 Preamp - Crossover
  241. Budget 2A3?
  242. first go at design - pp
  243. Tube Amp for MP3 Player
  244. Sonic signatures of KT88, 300B, 805, 845 in SET & PP Configurations
  245. Building the Baby Huey EL84 pushpull amplifier
  246. Tube Voltage Regulator, Is it worth the effort?
  247. Best tubeamp for metal, tight bass
  248. Donor stereo 845 amp- now what!?
  249. "Optimal" output grid loading?
  250. wax poured out!

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