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  1. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  2. Universal Power Transformer
  3. Tone control in a TubelabSE?
  4. 300B Sweet Spot
  5. Does 81ma sound about right?
  6. Frank's EC8010/6C45P-GM70 SE Interstage.
  7. I need a bit of help to fine tune my PP EL84 amp
  8. IS there any OTL pre amps out there?
  9. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?
  10. Project Planning (Steps/Order)
  11. Question about coding on tube
  12. 6H13C OTL using 12 parallel tubes
  13. SE 2 watt clean amp?
  14. Transformers for tweeter amps on ferrite donuts
  15. Noob Help: Converting Thomas organ / Wiring
  16. Vintage power transformers
  17. 1625 pp amp layout - comments invited
  18. Grundig 3028 HELP
  19. Oscillation in hybrid amp, how to solve?
  20. Hipass filter to control master bias? - Why attempt to reproduce DC in a tube amp?
  21. Audio Note M-Zero remote control problem
  22. SE TESLA E34L
  23. Need help to restore Sansui 500A
  24. Push-Push OTL?
  25. Stereo Circlotron using only two supplies...
  26. Mercury 1000/2000 KT-88 and 6l6 design bug
  27. Has some tried to use E/PL81 in PPP setup
  28. Heatsinks for tubes?
  29. Mechanical Isolation for a Power Transformer
  30. My First Tube Amp Build: S5 K12G
  31. Size does matter!
  32. tubelabSE with 300b
  33. EL509 (JJ) or PL519?
  34. Clone of JTM45
  35. how can i build a Choke?
  36. A new design
  37. My first and last DIY tube amp !
  38. anyone help convert dual volume to single?
  39. 480-0-480vac To Power A SE GM70!??
  40. Triode plate resistance == internal negative feedback?
  41. Quiz: which tube is this?
  42. 6EM7 Headphone Spud - Please comment
  43. replacement tubes
  44. Mengyue Mini EL34B stereo balance issues..
  45. Email Address for Heiner Jakobi ?
  46. A quick tube matching question
  47. 30W triode?
  48. My Project: Pilot 602
  49. Fake glow LED under valve in commercial devices
  50. Unknown PP output transformers
  51. Switching Amp? 25watts WITH OUT tubes or Transistors?!?
  52. Power Supply B+ voltage?
  53. Newby here first post.
  54. Cheap and easy tube amp.
  55. Rate/critique my Dynaco A410 mods..
  56. Hammond 1650n and Dynaco mark III circuit.
  57. A quick safety question
  58. George RE: 26E6WG
  59. Advice for a beginner please..
  60. Balancing the PP cathode bias
  61. Hybrid Circlotron Amplifier with only 3 components on the signal path
  62. PARTRIGE transformer
  63. Western Electric 205D Tube for Preamp?
  64. Does anyone have the PDF for the Plitron 4142 ?
  65. 16sj8
  66. Restoring Baldwin 40 watt amps
  67. LTspice U/L Transformer Symbol
  68. advice please, a setup to characterise opts
  69. 809's in Class B P-P w/feedback
  70. 5-pin plug needed
  71. Shorting Plugs
  72. Simple Audio Generator
  73. SE Amps with Variable Impedance Loads
  74. Linearity
  75. PSU Transformers for 6922 SRPP tube preamp
  76. 6JN8 curves?
  77. 6C6-2A3 Amplifier: Changes for 45?
  78. Which rectifier tubes are still manufactured?
  79. transconductance effect on peak power?
  80. Good Power Resistores ???
  81. Super cheap triode amplifier
  82. OTL designed by Glen Orr AudioXpress
  83. Heater voltages
  84. wire thickness
  85. JC Morrison circuits
  86. Building Valve Amplifier from schematic
  87. CliffUSA VS Cliff UK
  88. WHERE ARE;AND HOW ARE THE HARMONICS GENERATED?
  89. resistors for LT317 heater circuit
  90. Function of R2
  91. balanced input for any amplifier
  92. Spect output peak to peak for 807 SE ul
  93. HK Citation II Output Transformer Data ???
  94. Looking to purchase non-working output transformers
  95. metals!
  96. Another 2A3 build
  97. where r crossline master volumes from?
  98. Output Audio Transformer Impedance
  99. The echo effect of a headphone AMP
  100. flexy -a multirole driver/preamp-
  101. Scott 233 Bias procedure question
  102. What to do with 6DQ6B's?
  103. Goodcomponent - another chinese supplier
  104. Do EL34s in pentode mode PP AB1 sound better with lower screen voltage?
  105. Bogen MX60A as pre-amp
  106. kiwi.baby-huey. And so it begins...
  107. "sustain bias" and other organ amp ?s
  108. max current draw according to loadlines and reality
  109. Where to buy EI transformer bobbins?
  110. DHT filament circuit layouts ?
  111. After PP projects new SE project
  112. Gyrator Frequency Response?
  113. converting a dynaco mark IV driver board for headphone amp use
  114. Dared mp30
  115. PP pentode tube headphone amp PCB needed ( 6au6 thru el84)
  116. low wattage valve amps
  117. 6LU8 in Moscode 600
  118. The Octal Preamplifier with Phono section
  119. Which tube does my amp use? 12AU7 12BH7 12AX7 6CG7 others?
  120. Wacky Hum and Harmonics
  121. Constructions of ShuGang's 211 and 805A
  122. Tube ID help needed (EL34?)
  123. 5881, 6V6, EL84, or 7591 for triode-strapped operation?
  124. Strange Grounding Problem - My best guess: ghosts.
  125. High voltages
  126. PAC Perfectionist Audio Component preamp
  127. plate stoppers or cathode stoppers?
  128. Need Spud Amp schematic
  129. 5654 (6ak5) line stage in triode mode
  130. PSU capacitors
  131. Shuguang Treasure 300B-Z
  132. Rogers Cadet III input impedance
  133. Aikido w/ tone controls
  134. UTC Z-2961 input transformer
  135. Please help me improve my headphone amp
  136. Faint Hiss/Hum.
  137. What tubes with 3.3K p2p output?
  138. Strip board project completed.
  139. 6V6 SE VS ECL85
  140. 6v6 PP biasing question
  141. Phone Preamp PSU
  142. How much would a cathode follower drift ?
  143. Strange hum in a Williamson amp
  144. Tube preamp for a TDA2040 chipamp
  145. Heater problem
  146. A couple newbie questions
  147. 100KW Power Amplifier
  148. Excellent NOS Russian 6Pi3C/6N3C (6L6GC) Tubes...
  149. Flea-power class-A2 using a power opamp driver
  150. plate to plate feedback - measurements
  151. DC heat float with 50V bias tap from mains transformer?
  152. repair shop
  153. What to build next?
  154. Fisher X-100-C Output Transformer needed
  155. Schade Feedback
  156. RH807 push pull ?
  157. RIAA lite no.ls37
  158. help I need some addres tube store in amsterdam
  159. 50C5 pentode LTSpice model
  160. "Iron Garter" Push-Pull Amplifier
  161. Mcintosh Mc-3500 sound
  162. A couple of PSD questions
  163. parafeed - Gyrator vs CCS anode load
  164. Compactron amp... LIVES!
  165. Opinions Please
  166. Aikido REV D pcb
  167. New Edcor opt, what would a 150ohm primary be used for?
  168. GM-70, A2, biamping
  169. Espressivo Headphone Amplifier on Budget
  170. Coupling Caps for Aikido ACF Buffer
  171. How to compute current at control grid of power tube?
  172. High voltage SS output, any experiences ?
  173. Back on the forum after a long hiatus 6SN7 Preamp project in the works.
  174. Look for Single Tube scheme
  175. Cathode follower amplifier, push-pull, xformer-coupled
  176. help with "bruce heran" el84 amp S2
  177. Triodes and current flow
  178. Heaters Constant Current Regulator
  179. Driver Tubes: Help Me Decide
  180. Possible tweak
  181. DHT Driving Pentode Output Stage Question
  182. 50C5=50l6; 12av6=12at6
  183. Any experience to drive 805 tube?
  184. Fixed short in a 45
  185. power amp current
  186. Phase inverter/power section
  187. Concerned with current dual 5U4's...
  188. What tube is this?
  189. Signal tube noise!
  190. McIntosh Goodness From Scratch
  191. Fisher Output Transformer ID
  192. Stepped Attenuator for Air Tight ATC-1
  193. The Tube Killer Killer?
  194. Martel FAX-200C
  195. 6n6p headphone amp
  196. Ouput voltage of a triode stage on quiescent state should be zero?
  197. Hum Ho
  198. build a OTL (output-transformerless) amplifier
  199. 6v6 PP maggie with Polk SDA 1C
  200. Stromberg-Carlson AU-32 distortion in preamp
  201. Please Help - LF Peaks/Dips & Clipping
  202. Anybody watching this?
  203. Trying to find an unusual schematic posted here this Spring
  204. If you were going to build a OTL?
  205. Protecting a valve variable LM317 power supply
  206. EL34 PP PROJECT
  207. Matching tubes for PP
  208. Calculate triode strapped characteristics from pentode data?
  209. 6922 Loading Question
  210. corrections for LF and HF peaking
  211. 300bSE journey under way
  212. Why shielded tubes
  213. Aikido LV 6N27P SMPS completed
  214. Tube PS question: Acceptable ripple
  215. Back at the 45 SET
  216. Time to replace my 50 year old filter caps...
  217. Amazingly low distortion -- Radford-based design
  218. To ground or not to ground the OPT secondary, that is the question
  219. Ultralinear Observations and Questions
  220. FEEDBACK DELAY TIME
  221. 6SN7 v 6N8P v 6H8C
  222. NOS radio parts awaiting for my pick up!
  223. Toroidal Transformer Cover
  224. VTV 6sn7 line stage project
  225. can something be made using these tubes
  226. Help! Need tube tester info for 6CW4 Nuvistor
  227. Hampton MC preamp
  228. J-fet - tube DAC analog stage
  229. geloso 3270 power amplifier
  230. Belton micalex tube sockets any experience ?
  231. DeathTrap 500 - An Engineer's approach to the 300B SET
  232. My First Power Supply
  233. 5aR4 Rectifier Problem, Help! Little Long
  234. Electrolytic vs Polypropylene cathode
  235. Size of 5Y3 tubes?
  236. 3C24 really is a fine output tube...
  237. Yaqin MC100B Newbie Questions
  238. JE simple 45 SE grid leak resistor question
  239. 26 vs 27
  240. Bypass the tone control
  241. CCS with VN2222L
  242. Adding a ground with a 3 prong cable and connector
  243. European Made 6080/6AS7
  244. PFL200, what can I use them to?
  245. 7W7 tube - how it competes with other pentodes as driver?
  246. 1959 Blaupunkt receiver capacitors -Newbie
  247. i have one 5672 tube (new)
  248. 12ax7 pre amp + solid state power amp
  249. Preamp for Tim Mellow's 6C33C OTL
  250. Power supply buzz

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