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

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