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  1. can cap - rectifier spacing
  2. tube dampers anyone
  3. cnc aluminium chassis for tube amps
  4. Balanced Input as Phase Inverter?
  5. 300B SET amp input sensitivity, Help.
  6. Any thoughts on this circuit?
  7. Will This Work? 26 Linestage
  8. Eico HF-89a question
  9. 100TH Ep-Ip Curve
  10. Power Transformer - Can you use separate tap for screens?
  11. Power supply for PP1C - sanity check
  12. Blue Velvet preamp
  13. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  14. Universal Power Transformer
  15. Tone control in a TubelabSE?
  16. 300B Sweet Spot
  17. Does 81ma sound about right?
  18. Frank's EC8010/6C45P-GM70 SE Interstage.
  19. I need a bit of help to fine tune my PP EL84 amp
  20. IS there any OTL pre amps out there?
  21. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?
  22. Project Planning (Steps/Order)
  23. Question about coding on tube
  24. 6H13C OTL using 12 parallel tubes
  25. SE 2 watt clean amp?
  26. Transformers for tweeter amps on ferrite donuts
  27. Noob Help: Converting Thomas organ / Wiring
  28. Vintage power transformers
  29. 1625 pp amp layout - comments invited
  30. Grundig 3028 HELP
  31. Oscillation in hybrid amp, how to solve?
  32. Hipass filter to control master bias? - Why attempt to reproduce DC in a tube amp?
  33. Audio Note M-Zero remote control problem
  34. SE TESLA E34L
  35. Need help to restore Sansui 500A
  36. Push-Push OTL?
  37. Stereo Circlotron using only two supplies...
  38. Mercury 1000/2000 KT-88 and 6l6 design bug
  39. Has some tried to use E/PL81 in PPP setup
  40. Heatsinks for tubes?
  41. Mechanical Isolation for a Power Transformer
  42. My First Tube Amp Build: S5 K12G
  43. Size does matter!
  44. tubelabSE with 300b
  45. EL509 (JJ) or PL519?
  46. how can i build a Choke?
  47. A new design
  48. My first and last DIY tube amp !
  49. anyone help convert dual volume to single?
  50. 480-0-480vac To Power A SE GM70!??
  51. Triode plate resistance == internal negative feedback?
  52. Quiz: which tube is this?
  53. 6EM7 Headphone Spud - Please comment
  54. replacement tubes
  55. Mengyue Mini EL34B stereo balance issues..
  56. Email Address for Heiner Jakobi ?
  57. A quick tube matching question
  58. 30W triode?
  59. My Project: Pilot 602
  60. Fake glow LED under valve in commercial devices
  61. Unknown PP output transformers
  62. Switching Amp? 25watts WITH OUT tubes or Transistors?!?
  63. Power Supply B+ voltage?
  64. Newby here first post.
  65. Cheap and easy tube amp.
  66. Rate/critique my Dynaco A410 mods..
  67. Hammond 1650n and Dynaco mark III circuit.
  68. A quick safety question
  69. George RE: 26E6WG
  70. Advice for a beginner please..
  71. Balancing the PP cathode bias
  72. Hybrid Circlotron Amplifier with only 3 components on the signal path
  73. PARTRIGE transformer
  74. Western Electric 205D Tube for Preamp?
  75. Does anyone have the PDF for the Plitron 4142 ?
  76. 16sj8
  77. Restoring Baldwin 40 watt amps
  78. LTspice U/L Transformer Symbol
  79. advice please, a setup to characterise opts
  80. 809's in Class B P-P w/feedback
  81. Simple Audio Generator
  82. SE Amps with Variable Impedance Loads
  83. Linearity
  84. PSU Transformers for 6922 SRPP tube preamp
  85. 6JN8 curves?
  86. 6C6-2A3 Amplifier: Changes for 45?
  87. Which rectifier tubes are still manufactured?
  88. transconductance effect on peak power?
  89. Super cheap triode amplifier
  90. OTL designed by Glen Orr AudioXpress
  91. Heater voltages
  92. JC Morrison circuits
  93. Building Valve Amplifier from schematic
  94. CliffUSA VS Cliff UK
  95. Where are and how harmonics generated?
  96. resistors for LT317 heater circuit
  97. Function of R2
  98. balanced input for any amplifier
  99. Spect output peak to peak for 807 SE ul
  100. HK Citation II Output Transformer Data ???
  101. Looking to purchase non-working output transformers
  102. metals!
  103. Another 2A3 build
  104. where r crossline master volumes from?
  105. Output Audio Transformer Impedance
  106. The echo effect of a headphone AMP
  107. flexy -a multirole driver/preamp-
  108. Scott 233 Bias procedure question
  109. What to do with 6DQ6B's?
  110. Goodcomponent - another chinese supplier
  111. Do EL34s in pentode mode PP AB1 sound better with lower screen voltage?
  112. Bogen MX60A as pre-amp
  113. kiwi.baby-huey. And so it begins...
  114. "sustain bias" and other organ amp ?s
  115. max current draw according to loadlines and reality
  116. DHT filament circuit layouts ?
  117. After PP projects new SE project
  118. Gyrator Frequency Response?
  119. converting a dynaco mark IV driver board for headphone amp use
  120. Dared mp30
  121. PP pentode tube headphone amp PCB needed ( 6au6 thru el84)
  122. low wattage valve amps
  123. 6LU8 in Moscode 600
  124. The Octal Preamplifier with Phono section
  125. Which tube does my amp use? 12AU7 12BH7 12AX7 6CG7 others?
  126. Wacky Hum and Harmonics
  127. Constructions of ShuGang's 211 and 805A
  128. Tube ID help needed (EL34?)
  129. 5881, 6V6, EL84, or 7591 for triode-strapped operation?
  130. Strange Grounding Problem - My best guess: ghosts.
  131. High voltages
  132. PAC Perfectionist Audio Component preamp
  133. plate stoppers or cathode stoppers?
  134. Need Spud Amp schematic
  135. 5654 (6ak5) line stage in triode mode
  136. PSU capacitors
  137. Shuguang Treasure 300B-Z
  138. Rogers Cadet III input impedance
  139. Aikido w/ tone controls
  140. UTC Z-2961 input transformer
  141. Please help me improve my headphone amp
  142. Faint Hiss/Hum.
  143. What tubes with 3.3K p2p output?
  144. Strip board project completed.
  145. 6V6 SE VS ECL85
  146. 6v6 PP biasing question
  147. Phone Preamp PSU
  148. How much would a cathode follower drift ?
  149. Strange hum in a Williamson amp
  150. Tube preamp for a TDA2040 chipamp
  151. Heater problem
  152. A couple newbie questions
  153. 100KW Power Amplifier
  154. Excellent NOS Russian 6Pi3C/6N3C (6L6GC) Tubes...
  155. Flea-power class-A2 using a power opamp driver
  156. plate to plate feedback - measurements
  157. DC heat float with 50V bias tap from mains transformer?
  158. repair shop
  159. What to build next?
  160. Fisher X-100-C Output Transformer needed
  161. Schade Feedback
  162. RH807 push pull ?
  163. RIAA lite no.ls37
  164. help I need some addres tube store in amsterdam
  165. 50C5 pentode LTSpice model
  166. "Iron Garter" Push-Pull Amplifier
  167. Mcintosh Mc-3500 sound
  168. A couple of PSD questions
  169. parafeed - Gyrator vs CCS anode load
  170. Compactron amp... LIVES!
  171. Opinions Please
  172. Aikido REV D pcb
  173. New Edcor opt, what would a 150ohm primary be used for?
  174. GM-70, A2, biamping
  175. Espressivo Headphone Amplifier on Budget
  176. Coupling Caps for Aikido ACF Buffer
  177. How to compute current at control grid of power tube?
  178. High voltage SS output, any experiences ?
  179. Back on the forum after a long hiatus 6SN7 Preamp project in the works.
  180. Look for Single Tube scheme
  181. Cathode follower amplifier, push-pull, xformer-coupled
  182. help with "bruce heran" el84 amp S2
  183. Triodes and current flow
  184. Heaters Constant Current Regulator
  185. Driver Tubes: Help Me Decide
  186. Possible tweak
  187. DHT Driving Pentode Output Stage Question
  188. 50C5=50l6; 12av6=12at6
  189. Any experience to drive 805 tube?
  190. Fixed short in a 45
  191. power amp current
  192. Phase inverter/power section
  193. Concerned with current dual 5U4's...
  194. What tube is this?
  195. Signal tube noise!
  196. McIntosh Goodness From Scratch
  197. Fisher Output Transformer ID
  198. Stepped Attenuator for Air Tight ATC-1
  199. The Tube Killer Killer?
  200. Martel FAX-200C
  201. 6n6p headphone amp
  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. 6SN7 v 6N8P v 6H8C
  227. NOS radio parts awaiting for my pick up!
  228. Toroidal Transformer Cover
  229. VTV 6sn7 line stage project
  230. can something be made using these tubes
  231. Hampton MC preamp
  232. J-fet - tube DAC analog stage
  233. geloso 3270 power amplifier
  234. Belton micalex tube sockets any experience ?
  235. DeathTrap 500 - An Engineer's approach to the 300B SET
  236. My First Power Supply
  237. 5aR4 Rectifier Problem, Help! Little Long
  238. Electrolytic vs Polypropylene cathode
  239. Size of 5Y3 tubes?
  240. 3C24 really is a fine output tube...
  241. Yaqin MC100B Newbie Questions
  242. JE simple 45 SE grid leak resistor question
  243. 26 vs 27
  244. Bypass the tone control
  245. CCS with VN2222L
  246. European Made 6080/6AS7
  247. PFL200, what can I use them to?
  248. 7W7 tube - how it competes with other pentodes as driver?
  249. 1959 Blaupunkt receiver capacitors -Newbie
  250. i have one 5672 tube (new)

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