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  1. Tube Hybrid Amp Gain Calculation
  2. transformer coupled plate follower
  3. What does your system look like?
  4. Cascoding tubes
  5. Advice with modification of Beard power amp
  6. Harman Kardon TA5000-X power XFMR
  7. This happens when you hire a good designer.
  8. Test & Measurement interface for Soundcard
  9. Where to find large capacity high voltage caps?
  10. Output capasitor-less "Bijow" headphone amp
  11. 1st Pass at 1st Phono Preamp; Comments?
  12. Transformers to try.
  13. Hum in phono pre - help please
  14. Output transformer cores
  15. Output transformer cores
  16. Presonus Bluetube makeover
  17. Guitar amp on the cheap???
  18. Tube Amp Channel Switching
  19. physically small twin triode tube
  20. Tubelab SE 2A3 _ Newbie question.
  21. TJ Full Music Factory Tour Now Online
  22. where to find cool vol control knobs?
  23. $200 6V6 Amp
  24. Audio Research Reference Phono, anyone?
  25. Review of Suppo Audio's first offering - EL84 Push Pull
  26. 6n23p(-ev)
  27. Akikido LSA/HPA 9-Pin or Akikido Octal which one?
  28. TUBE AMP 1946 worth grabbing?
  29. SE Newbie wants to go level 2
  30. Where To Purchase Tube Amp Parts in the UK
  31. The soul of a new "electrostatic" machine
  32. Transformer question
  33. Hybrid caps
  34. 6021 phono pre-amp
  35. bandmaster ab763 fx loop
  36. How to design input stage with specific input impedance/pot value
  37. Simple SE Grounding Question
  38. James OPT connections?
  39. DIY rtp5 help please?
  40. SS Followers to drive power tubes
  41. Sophia Electric EL34 Schematic
  42. DRD amplifier with CCS?
  43. Phono Preamp
  44. Dynaco ST-70 with a GSI board, Parts diagram and any info PLEASE
  45. transistor AC blocker
  46. PL519 Source
  47. Identify this mullard
  48. Suppo Audio -- New Chinese EL84 PP amp for CHEAP.
  49. Beard p35mkII schematics/photo photo
  50. Bias transformer question
  51. Anyone deliberately dial in 2nd harmonic?
  52. What is the sonic impact of SS CCS in tube equipment
  53. Phase help
  54. El34-kt88
  55. Transconductance amplifier based on hybrid cascode
  56. Chinese 6Z4, also those regulated supplies.
  57. Audion Reference restoration
  58. Anyone try a regulated PS in an Ultrapath preamp?
  59. Source for Resistor sets?
  60. High Zout tube preamps with ss power amps.
  61. PSUD II soft start
  62. About the 6AU6s
  63. Capacitor polarity question
  64. Audio Note line preamp question
  65. EL34 SE amp schematic
  66. looking for 12AT7 / ECC81 phase splitter
  67. 6AS7 getting rare?
  68. How to power up a new Build the first time
  69. power transformer for a 2a3se amp!
  70. 6DJ8 Tube Phono and Line Preamp
  71. ST-35 Build Using PC13 Boards Questions and Thoughts
  72. My new hybrid full single ended amplifier project on going
  73. Punch tools for making metal top plates on amps
  74. antique sound lab AQ1009-845 interstage transformer replacement
  75. The search for the ultimate 6SN7
  76. Looking for a good part web store
  77. Need your advice for tube amp case
  78. Questions about grounding
  79. power supply
  80. Strange idea for an output stage - comments requested
  81. Please comment on this EL84 PP design
  82. 1.5VDC Heater Supply For #26!?
  83. Looking for 300B or 2A3 design suggestions......gearing up for a new project
  84. original philips AD-9058
  85. Bench test equipment, What's yours?
  86. Gain calculating in 12ax7 guitar preamp
  87. 7027A with tubelab simple se
  88. Tube Lab SE Problem
  89. Tube Socket help, I'm looking at a few, but not sure which material to buy?
  90. Sweep tube info/specs
  91. Help for Tango 300b amp
  92. vacuum tubes type 10 and UX201A
  93. 6DQ5 specs for audio
  94. r-core output transformers...
  95. Isolation Transformer Question
  96. Buffer question?
  97. el95 pp amp for guitar
  98. Two positive rails from a center-tapped transformer?
  99. Help reqd - 115V PTX on 230V
  100. Replacing the cathode resistor with a current source in SE ?
  101. First 300b Design, Please comment
  102. 6AX4 datasheet question
  103. Bias Drift
  104. Recommend me a tube...
  105. What happens when Heater Cathode voltage is exceeded?
  106. 100uF Motor Run Caps
  107. HELP Schematics for RL 12 T 15
  108. Phono Stage
  109. TEE Vee Tube fans' SE Cf Amp
  110. Yaqin MC-10L losing volume
  111. Pl84 tubes
  112. AnalogMetric 6L6GC SE amp kit...thoughts about this kit?
  113. 5150 or slo 5-50w clone
  114. ECC88, warm up time
  115. Yaqin MC-10L Heater Voltage
  116. 6c33 otl amblifier
  117. self-oscillation in Dynaco ST-70
  118. computer tube tester
  119. Troubleshooting the decware se84 kit
  120. 6L6 PP problem
  121. First try at an Eagle Schematic/board
  122. opinions on decware zen kit
  123. Powerdrive for PP amp with local feedback and pentode driver ?
  124. having trouble calculating transconductance
  125. Philips console unit with reverb!
  126. 300BSET with Kimmel style mu driver ?
  127. Testing Mullard 12AU7 on Hickok 600A
  128. EL34/6CA7 driven 300B Schematics
  129. C450 Radio Craftsmen info needed
  130. Tubelab Simple SE v.2
  131. Magnetic shielding with aluminum
  132. lampizator dac
  133. AES is At It Again...
  134. Se Amp with Push Pull Transformer
  135. 6550 which breed can take the flog ?
  136. Chassis Question
  137. EL82 in triode with silverstepper (TVC)
  138. Joined the 12b4 line stage club. And worth it!
  139. ECL86/PCL86 Schematic
  140. Ambient temperature and tubes
  141. Vintage output transformers
  142. -ve grid voltage
  143. Ming Da MC-3008-A2 Mono Blocks
  144. V-Reg, Gyrator, Low (relative) voltage tubes
  145. Simple Tube amp
  146. Jolida 502A replace power switch
  147. Tubelab build selector switch question
  148. Matching tubes pot in old Fenders
  149. tubes supplier
  150. RadioDaze out of the tube business
  151. 8000+ hours on my Simple SE
  152. C-L-C-parallel-R-C
  153. musical power supplies
  154. Trimpots sound better than equivalent resistors for biasing?
  155. Anyone have a simple circuit for . .
  156. PP Tube Biasing, how good is good enough?
  157. Aesthetics
  158. Point to point, from scatch build of the K-12G
  159. What 6550 for Conrad MV75
  160. Motorboating phono input on Stromberg Carlson ASR433
  161. Sunn Sceptre: Weak Vibrato Cause?
  162. Pioneer sr-101
  163. 6AU6 in Push Pull: Opinions please
  164. Audionote M7 and Foreplay III
  165. vintage triode
  166. Help with design review wanted
  167. 6J52P pentode driver?
  168. a gutar amp I built
  169. Looking for a good valve preamp
  170. Anyone try the "Hazen mod" to G3 supressor grid
  171. 6L6GC -Which Shuguang can take the Heat?
  172. Using Toroidal PTs as tube OTs - methods and sources
  173. With a little help... KT88 PP UL Amp
  174. TechTube Featured In November AudioXpress
  175. Yaqin MC-100b channel imbalance
  176. Modify KT88 SE for headphone use
  177. Regulated Tube Preamp question
  178. Has anybody purchased from Mable Audio?
  179. PS voltage changes after capacitor replacement
  180. Non-magnetic bolts that hold an output transformer together
  181. e bay op tranformers opinion please
  182. Audio Innovations Series 500 Rewire
  183. Which audio electrolytics in tube voltages -- Your comments please !
  184. Some general opt questions.
  185. Looking for ANYTHING on the Audioromy 838 w/805A Tube..
  186. modifying zenith 7d31 amp console
  187. Questions on JE Labs transformer coupled line stage
  188. Onix/Melody SP3 Upgrades and Mods
  189. Motorboating with Regulated Supply
  190. 27 & 6SN7 Preamp - Crossover
  191. Budget 2A3?
  192. first go at design - pp
  193. Guitar Tube-Amp Entusiast Seeks A/V Advice
  194. Tube Amp for MP3 Player
  195. Sonic signatures of KT88, 300B, 805, 845 in SET & PP Configurations
  196. Marshall amp loses bias
  197. Building the Baby Huey EL84 pushpull amplifier
  198. Tube Voltage Regulator, Is it worth the effort?
  199. Best tubeamp for metal, tight bass
  200. Donor stereo 845 amp- now what!?
  201. "Optimal" output grid loading?
  202. wax poured out!
  203. Yet another do-nothing tOOb hack.
  204. What is a CCS - how do you design one?
  205. Strange Aikido problem when home power fluctuates
  206. Need to regulate 450v --> 300v
  207. new to the forum and looking for el86 info
  208. Why not invert the Tubelab SE board?
  209. Steve Bench Crossover Questions
  210. Audio Note M7 - 7F7 CCS
  211. Anyone have schema for katodcoupled 6C33 P-P?
  212. Ltspice and Valve models
  213. VTV Push-Pull 6SN7/KT88 Amp: DIY or China?
  214. How to identify type of bias used for my tube amp
  215. VR Tube Question
  216. Ampmaker Kits
  217. P-P with some muscle
  218. buzz w/ nothing plugged into inputs. Goes away once jacked in.
  219. CV6 / CV1135 / E1148 / VT232 VHF oscillator triode data
  220. HELP HELP HELP mesa rectifier
  221. simple se with source selector
  222. Measuring tube/component temperature
  223. Parallel Single Ended Amplifier Design using Acro TO-290s?
  224. Elevate heater trouble
  225. Adjusting the sensitivity on a 6e2 magic eye tube
  226. tube amp for automobile / need ideas
  227. 6550A HF Amp
  228. problem - scratchy sound, rythmical
  229. eico st70 irons!what to do?
  230. How Lampizator CD tube player sound?
  231. Maestro soya amplificador
  232. Can I use my tube amp as a preamp ?
  233. Simple SE with 6BG6GA - magic smoke escapes...
  234. Shunt Cascode Power Valve Driver
  235. Did Siemens ever publish data for their own D3A ?
  236. Motor run caps as power supply filter
  237. Measure unknown choke?
  238. 6528a....HELP ME PLEASE...PLEASE..
  239. Are any of these tubes useful to me?
  240. Heaters The Key Too Sweet Tube Tone.
  241. PP Output Transformer design
  242. "Kingfisher" P-P Amp using 7591A Outputs and Fisher 500B Iron
  243. 832 ultra-linear push pull?
  244. 3A5 thoughts
  245. ECC86 vs. ECC88
  246. RH84 builder!
  247. 10GV8 Bias point for the K-12G
  248. EL34 amp blowing up, anode glowing red hot
  249. Steve Bench's LR Phono Stage - Cathode Bias Circuit Question
  250. Tubelab SE w/Parafeed