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  1. Breadboard help
  2. Odd amp built with PL81 / PL36
  3. Has anyone built a 47 SE amp?
  4. Which EL84
  5. First attempt p2p valve power amp
  6. Fundamental Pentode Question
  7. EL34 Triode Mode Resistors
  8. 807 SE Schematic Critiques
  9. Amp for Magneplanar 1.6
  10. After Christmas free time
  11. Tubelab Single Ended Amps
  12. I suppose I am a little dense
  13. 12AU7 SE practise amp project
  14. LED bias with gNFB
  15. Schematic question - what this cap is for ?
  16. Hi fi stereo tube amp through guitar speakers??
  17. Output transformer
  18. 50C5s in PP ?
  19. input resistor on the JE LAB 300B
  20. Sockets for UY 41
  21. Any good tube amp kits for a first attempt?
  22. power supply suggestions and advice
  23. favourite midrange,treble tubes
  24. How can I turn 120VAC to 100VAC for Tango MS-UVD in an 845 SE amp?
  25. suspect a bad tube-any simple checks?
  26. Long-Tailed Pair, pse. share your views...
  27. 12AT7 vs 6SL7 as splitter for 6V6 ppp amp
  28. Ultralinear but no UL taps.
  29. OPT Question
  30. An Important Dumb Question-Newbie Stuff
  31. Switched to LED bias on 6SN7 cathode - how do I calculate current?
  32. Autobias OTL....Any thoughts?
  33. Valve Line Amp suggestions
  34. another 6c33 se
  35. no sound on the PHONO channel....
  36. What do you think of this cheap tube amplifier?
  37. What guitar amp should I build from these?
  38. EL34 Hickok 439B setup
  39. Hickok 605
  40. Help! Want to Diy Tube Amp!
  41. Anyone care for some troubleshooting? Hum issue
  42. Re-tubing stock ST70
  43. your opinion of this bias problem
  44. paraphase with follower
  45. Noisy transformer
  46. 6BN11 in triode mode...any experience ?
  47. morgan jones:output stages
  48. Dynaco SCA-35 - fan Cooling?
  49. Partridge Vs Edcor
  50. Feedback with a choke ?
  51. Do you have a tube tester?
  52. Level matching?
  53. cascoded bjt ccs - design check please
  54. Hammond Organ amp to guitar amp
  55. Square wave testing......a guitar amp
  56. help on amp gain structure
  57. iPod/BlackBerry/MP3 input
  58. Shuguang 805 - Advice
  59. Mains Transformer Hums under load
  60. Film Caps in Tube Amps
  61. K12G left channel dead: HELP!
  62. Model 16LS Stereo Integrated Tube Amplifier
  63. Help identifying components
  64. Odd Block Series 1 6L6 Amp Power Supply
  65. Mesa/Boogie Bass 400+ mod question
  66. Need Help for Improving HEATHKIT AA 151
  67. Troubleshooting help for a neophyte
  68. can cap - rectifier spacing
  69. tube dampers anyone
  70. cnc aluminium chassis for tube amps
  71. Balanced Input as Phase Inverter?
  72. 300B SET amp input sensitivity, Help.
  73. Any thoughts on this circuit?
  74. Will This Work? 26 Linestage
  75. Eico HF-89a question
  76. 100TH Ep-Ip Curve
  77. Power Transformer - Can you use separate tap for screens?
  78. Power supply for PP1C - sanity check
  79. Blue Velvet preamp
  80. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  81. Universal Power Transformer
  82. Tone control in a TubelabSE?
  83. 300B Sweet Spot
  84. Does 81ma sound about right?
  85. Frank's EC8010/6C45P-GM70 SE Interstage.
  86. I need a bit of help to fine tune my PP EL84 amp
  87. IS there any OTL pre amps out there?
  88. Rubycon oil caps
  89. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?
  90. Project Planning (Steps/Order)
  91. Question about coding on tube
  92. 6H13C OTL using 12 parallel tubes
  93. SE 2 watt clean amp?
  94. Transformers for tweeter amps on ferrite donuts
  95. Noob Help: Converting Thomas organ / Wiring
  96. Vintage power transformers
  97. 1625 pp amp layout - comments invited
  98. Grundig 3028 HELP
  99. Oscillation in hybrid amp, how to solve?
  100. Hipass filter to control master bias? - Why attempt to reproduce DC in a tube amp?
  101. Audio Note M-Zero remote control problem
  102. SE TESLA E34L
  103. Need help to restore Sansui 500A
  104. Push-Push OTL?
  105. Stereo Circlotron using only two supplies...
  106. Mercury 1000/2000 KT-88 and 6l6 design bug
  107. Has some tried to use E/PL81 in PPP setup
  108. Heatsinks for tubes?
  109. Mechanical Isolation for a Power Transformer
  110. My First Tube Amp Build: S5 K12G
  111. Size does matter!
  112. tubelabSE with 300b
  113. EL509 (JJ) or PL519?
  114. Clone of JTM45
  115. how can i build a Choke?
  116. A new design
  117. My first and last DIY tube amp !
  118. anyone help convert dual volume to single?
  119. 480-0-480vac To Power A SE GM70!??
  120. Triode plate resistance == internal negative feedback?
  121. Quiz: which tube is this?
  122. 6EM7 Headphone Spud - Please comment
  123. replacement tubes
  124. Mengyue Mini EL34B stereo balance issues..
  125. Email Address for Heiner Jakobi ?
  126. A quick tube matching question
  127. 30W triode?
  128. My Project: Pilot 602
  129. Fake glow LED under valve in commercial devices
  130. Unknown PP output transformers
  131. Switching Amp? 25watts WITH OUT tubes or Transistors?!?
  132. Power Supply B+ voltage?
  133. Newby here first post.
  134. Cheap and easy tube amp.
  135. Rate/critique my Dynaco A410 mods..
  136. Hammond 1650n and Dynaco mark III circuit.
  137. A quick safety question
  138. George RE: 26E6WG
  139. Advice for a beginner please..
  140. Balancing the PP cathode bias
  141. Hybrid Circlotron Amplifier with only 3 components on the signal path
  142. PARTRIGE transformer
  143. Western Electric 205D Tube for Preamp?
  144. Does anyone have the PDF for the Plitron 4142 ?
  145. 16sj8
  146. Mumbo-Jumbo and power supply caps
  147. Restoring Baldwin 40 watt amps
  148. LTspice U/L Transformer Symbol
  149. advice please, a setup to characterise opts
  150. 809's in Class B P-P w/feedback
  151. 5-pin plug needed
  152. Shorting Plugs
  153. Simple Audio Generator
  154. SE Amps with Variable Impedance Loads
  155. Linearity
  156. PSU Transformers for 6922 SRPP tube preamp
  157. 6JN8 curves?
  158. 6C6-2A3 Amplifier: Changes for 45?
  159. Which rectifier tubes are still manufactured?
  160. transconductance effect on peak power?
  161. Good Power Resistores ???
  162. Super cheap triode amplifier
  163. OTL designed by Glen Orr AudioXpress
  164. Heater voltages
  165. wire thickness
  166. JC Morrison circuits
  167. Building Valve Amplifier from schematic
  168. CliffUSA VS Cliff UK
  169. WHERE ARE;AND HOW ARE THE HARMONICS GENERATED?
  170. resistors for LT317 heater circuit
  171. Function of R2
  172. balanced input for any amplifier
  173. Spect output peak to peak for 807 SE ul
  174. HK Citation II Output Transformer Data ???
  175. Looking to purchase non-working output transformers
  176. metals!
  177. Another 2A3 build
  178. where r crossline master volumes from?
  179. Output Audio Transformer Impedance
  180. The echo effect of a headphone AMP
  181. flexy -a multirole driver/preamp-
  182. Scott 233 Bias procedure question
  183. What to do with 6DQ6B's?
  184. Goodcomponent - another chinese supplier
  185. Do EL34s in pentode mode PP AB1 sound better with lower screen voltage?
  186. Bogen MX60A as pre-amp
  187. kiwi.baby-huey. And so it begins...
  188. "sustain bias" and other organ amp ?s
  189. max current draw according to loadlines and reality
  190. Where to buy EI transformer bobbins?
  191. DHT filament circuit layouts ?
  192. After PP projects new SE project
  193. Gyrator Frequency Response?
  194. converting a dynaco mark IV driver board for headphone amp use
  195. Dared mp30
  196. PP pentode tube headphone amp PCB needed ( 6au6 thru el84)
  197. low wattage valve amps
  198. 6LU8 in Moscode 600
  199. The Octal Preamplifier with Phono section
  200. Which tube does my amp use? 12AU7 12BH7 12AX7 6CG7 others?
  201. Wacky Hum and Harmonics
  202. Constructions of ShuGang's 211 and 805A
  203. Tube ID help needed (EL34?)
  204. 5881, 6V6, EL84, or 7591 for triode-strapped operation?
  205. Strange Grounding Problem - My best guess: ghosts.
  206. High voltages
  207. PAC Perfectionist Audio Component preamp
  208. plate stoppers or cathode stoppers?
  209. Need Spud Amp schematic
  210. 5654 (6ak5) line stage in triode mode
  211. PSU capacitors
  212. Shuguang Treasure 300B-Z
  213. Rogers Cadet III input impedance
  214. Aikido w/ tone controls
  215. UTC Z-2961 input transformer
  216. Please help me improve my headphone amp
  217. Faint Hiss/Hum.
  218. What tubes with 3.3K p2p output?
  219. Strip board project completed.
  220. 6V6 SE VS ECL85
  221. 6v6 PP biasing question
  222. Phone Preamp PSU
  223. How much would a cathode follower drift ?
  224. Strange hum in a Williamson amp
  225. Tube preamp for a TDA2040 chipamp
  226. Heater problem
  227. A couple newbie questions
  228. 100KW Power Amplifier
  229. Excellent NOS Russian 6Pi3C/6N3C (6L6GC) Tubes...
  230. Flea-power class-A2 using a power opamp driver
  231. plate to plate feedback - measurements
  232. DC heat float with 50V bias tap from mains transformer?
  233. repair shop
  234. What to build next?
  235. Fisher X-100-C Output Transformer needed
  236. Schade Feedback
  237. RH807 push pull ?
  238. RIAA lite no.ls37
  239. help I need some addres tube store in amsterdam
  240. Valve curve tracer gm tester
  241. 50C5 pentode LTSpice model
  242. "Iron Garter" Push-Pull Amplifier
  243. Mcintosh Mc-3500 sound
  244. A couple of PSD questions
  245. parafeed - Gyrator vs CCS anode load
  246. Compactron amp... LIVES!
  247. Opinions Please
  248. Aikido REV D pcb
  249. New Edcor opt, what would a 150ohm primary be used for?
  250. GM-70, A2, biamping

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