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  1. 300B SET amp input sensitivity, Help.
  2. Any thoughts on this circuit?
  3. Will This Work? 26 Linestage
  4. Eico HF-89a question
  5. 100TH Ep-Ip Curve
  6. Power Transformer - Can you use separate tap for screens?
  7. Power supply for PP1C - sanity check
  8. Blue Velvet preamp
  9. Paid 5$ for this deluxe/vibrolux schematic! some connections missing help!!
  10. Universal Power Transformer
  11. Tone control in a TubelabSE?
  12. 300B Sweet Spot
  13. Does 81ma sound about right?
  14. Frank's EC8010/6C45P-GM70 SE Interstage.
  15. I need a bit of help to fine tune my PP EL84 amp
  16. IS there any OTL pre amps out there?
  17. Rubycon oil caps
  18. 6BQ5 Sweet Spot?-Charts for other than 250 Screen Volts?
  19. Project Planning (Steps/Order)
  20. Question about coding on tube
  21. 6H13C OTL using 12 parallel tubes
  22. SE 2 watt clean amp?
  23. Transformers for tweeter amps on ferrite donuts
  24. Noob Help: Converting Thomas organ / Wiring
  25. Vintage power transformers
  26. 1625 pp amp layout - comments invited
  27. Grundig 3028 HELP
  28. Oscillation in hybrid amp, how to solve?
  29. Hipass filter to control master bias? - Why attempt to reproduce DC in a tube amp?
  30. Audio Note M-Zero remote control problem
  31. SE TESLA E34L
  32. Need help to restore Sansui 500A
  33. Push-Push OTL?
  34. Stereo Circlotron using only two supplies...
  35. Mercury 1000/2000 KT-88 and 6l6 design bug
  36. Has some tried to use E/PL81 in PPP setup
  37. Heatsinks for tubes?
  38. Mechanical Isolation for a Power Transformer
  39. My First Tube Amp Build: S5 K12G
  40. Size does matter!
  41. tubelabSE with 300b
  42. EL509 (JJ) or PL519?
  43. Clone of JTM45
  44. how can i build a Choke?
  45. A new design
  46. My first and last DIY tube amp !
  47. anyone help convert dual volume to single?
  48. 480-0-480vac To Power A SE GM70!??
  49. Triode plate resistance == internal negative feedback?
  50. Quiz: which tube is this?
  51. 6EM7 Headphone Spud - Please comment
  52. replacement tubes
  53. Mengyue Mini EL34B stereo balance issues..
  54. Email Address for Heiner Jakobi ?
  55. A quick tube matching question
  56. 30W triode?
  57. My Project: Pilot 602
  58. Fake glow LED under valve in commercial devices
  59. Unknown PP output transformers
  60. Switching Amp? 25watts WITH OUT tubes or Transistors?!?
  61. Power Supply B+ voltage?
  62. Newby here first post.
  63. Cheap and easy tube amp.
  64. Rate/critique my Dynaco A410 mods..
  65. Hammond 1650n and Dynaco mark III circuit.
  66. A quick safety question
  67. George RE: 26E6WG
  68. Advice for a beginner please..
  69. Balancing the PP cathode bias
  70. Hybrid Circlotron Amplifier with only 3 components on the signal path
  71. PARTRIGE transformer
  72. Western Electric 205D Tube for Preamp?
  73. Does anyone have the PDF for the Plitron 4142 ?
  74. 16sj8
  75. Mumbo-Jumbo and power supply caps
  76. Restoring Baldwin 40 watt amps
  77. LTspice U/L Transformer Symbol
  78. advice please, a setup to characterise opts
  79. 809's in Class B P-P w/feedback
  80. 5-pin plug needed
  81. Shorting Plugs
  82. Simple Audio Generator
  83. SE Amps with Variable Impedance Loads
  84. Linearity
  85. PSU Transformers for 6922 SRPP tube preamp
  86. 6JN8 curves?
  87. 6C6-2A3 Amplifier: Changes for 45?
  88. Which rectifier tubes are still manufactured?
  89. transconductance effect on peak power?
  90. Good Power Resistores ???
  91. Super cheap triode amplifier
  92. OTL designed by Glen Orr AudioXpress
  93. Heater voltages
  94. wire thickness
  95. JC Morrison circuits
  96. Building Valve Amplifier from schematic
  97. CliffUSA VS Cliff UK
  98. WHERE ARE;AND HOW ARE THE HARMONICS GENERATED?
  99. resistors for LT317 heater circuit
  100. Function of R2
  101. balanced input for any amplifier
  102. Spect output peak to peak for 807 SE ul
  103. HK Citation II Output Transformer Data ???
  104. Looking to purchase non-working output transformers
  105. metals!
  106. Another 2A3 build
  107. where r crossline master volumes from?
  108. Output Audio Transformer Impedance
  109. The echo effect of a headphone AMP
  110. flexy -a multirole driver/preamp-
  111. Scott 233 Bias procedure question
  112. What to do with 6DQ6B's?
  113. Goodcomponent - another chinese supplier
  114. Do EL34s in pentode mode PP AB1 sound better with lower screen voltage?
  115. Bogen MX60A as pre-amp
  116. kiwi.baby-huey. And so it begins...
  117. "sustain bias" and other organ amp ?s
  118. max current draw according to loadlines and reality
  119. Where to buy EI transformer bobbins?
  120. DHT filament circuit layouts ?
  121. After PP projects new SE project
  122. Gyrator Frequency Response?
  123. converting a dynaco mark IV driver board for headphone amp use
  124. Dared mp30
  125. PP pentode tube headphone amp PCB needed ( 6au6 thru el84)
  126. low wattage valve amps
  127. 6LU8 in Moscode 600
  128. The Octal Preamplifier with Phono section
  129. Which tube does my amp use? 12AU7 12BH7 12AX7 6CG7 others?
  130. Wacky Hum and Harmonics
  131. Constructions of ShuGang's 211 and 805A
  132. Tube ID help needed (EL34?)
  133. 5881, 6V6, EL84, or 7591 for triode-strapped operation?
  134. Strange Grounding Problem - My best guess: ghosts.
  135. High voltages
  136. PAC Perfectionist Audio Component preamp
  137. plate stoppers or cathode stoppers?
  138. Need Spud Amp schematic
  139. 5654 (6ak5) line stage in triode mode
  140. PSU capacitors
  141. Shuguang Treasure 300B-Z
  142. Rogers Cadet III input impedance
  143. Aikido w/ tone controls
  144. UTC Z-2961 input transformer
  145. Please help me improve my headphone amp
  146. Faint Hiss/Hum.
  147. What tubes with 3.3K p2p output?
  148. Strip board project completed.
  149. 6V6 SE VS ECL85
  150. 6v6 PP biasing question
  151. Phone Preamp PSU
  152. How much would a cathode follower drift ?
  153. Strange hum in a Williamson amp
  154. Tube preamp for a TDA2040 chipamp
  155. Heater problem
  156. A couple newbie questions
  157. 100KW Power Amplifier
  158. Excellent NOS Russian 6Pi3C/6N3C (6L6GC) Tubes...
  159. Flea-power class-A2 using a power opamp driver
  160. plate to plate feedback - measurements
  161. DC heat float with 50V bias tap from mains transformer?
  162. repair shop
  163. What to build next?
  164. Fisher X-100-C Output Transformer needed
  165. Schade Feedback
  166. RH807 push pull ?
  167. RIAA lite no.ls37
  168. help I need some addres tube store in amsterdam
  169. Valve curve tracer gm tester
  170. 50C5 pentode LTSpice model
  171. "Iron Garter" Push-Pull Amplifier
  172. Mcintosh Mc-3500 sound
  173. A couple of PSD questions
  174. parafeed - Gyrator vs CCS anode load
  175. Compactron amp... LIVES!
  176. Opinions Please
  177. Aikido REV D pcb
  178. New Edcor opt, what would a 150ohm primary be used for?
  179. GM-70, A2, biamping
  180. Espressivo Headphone Amplifier on Budget
  181. Coupling Caps for Aikido ACF Buffer
  182. How to compute current at control grid of power tube?
  183. High voltage SS output, any experiences ?
  184. Back on the forum after a long hiatus 6SN7 Preamp project in the works.
  185. Look for Single Tube scheme
  186. Cathode follower amplifier, push-pull, xformer-coupled
  187. help with "bruce heran" el84 amp S2
  188. Triodes and current flow
  189. Heaters Constant Current Regulator
  190. Driver Tubes: Help Me Decide
  191. Possible tweak
  192. DHT Driving Pentode Output Stage Question
  193. 50C5=50l6; 12av6=12at6
  194. Any experience to drive 805 tube?
  195. Fixed short in a 45
  196. power amp current
  197. Phase inverter/power section
  198. Concerned with current dual 5U4's...
  199. What tube is this?
  200. Signal tube noise!
  201. McIntosh Goodness From Scratch
  202. Marshall Amp strange wiring
  203. Fisher Output Transformer ID
  204. Stepped Attenuator for Air Tight ATC-1
  205. Caps .
  206. The Tube Killer Killer?
  207. Martel FAX-200C
  208. 6n6p headphone amp
  209. 2 caps vs 1 (adding low value teflon to pio)
  210. Ouput voltage of a triode stage on quiescent state should be zero?
  211. Hum Ho
  212. build a OTL (output-transformerless) amplifier
  213. 6v6 PP maggie with Polk SDA 1C
  214. Stromberg-Carlson AU-32 distortion in preamp
  215. Please Help - LF Peaks/Dips & Clipping
  216. Anybody watching this?
  217. Trying to find an unusual schematic posted here this Spring
  218. If you were going to build a OTL?
  219. Protecting a valve variable LM317 power supply
  220. EL34 PP PROJECT
  221. Matching tubes for PP
  222. Calculate triode strapped characteristics from pentode data?
  223. 6922 Loading Question
  224. corrections for LF and HF peaking
  225. 300bSE journey under way
  226. Why shielded tubes
  227. Aikido LV 6N27P SMPS completed
  228. Tube PS question: Acceptable ripple
  229. Back at the 45 SET
  230. Time to replace my 50 year old filter caps...
  231. Amazingly low distortion -- Radford-based design
  232. To ground or not to ground the OPT secondary, that is the question
  233. Ultralinear Observations and Questions
  234. FEEDBACK DELAY TIME
  235. 6SN7 v 6N8P v 6H8C
  236. NOS radio parts awaiting for my pick up!
  237. Toroidal Transformer Cover
  238. VTV 6sn7 line stage project
  239. can something be made using these tubes
  240. Help! Need tube tester info for 6CW4 Nuvistor
  241. Hampton MC preamp
  242. J-fet - tube DAC analog stage
  243. geloso 3270 power amplifier
  244. Belton micalex tube sockets any experience ?
  245. DeathTrap 500 - An Engineer's approach to the 300B SET
  246. My First Power Supply
  247. 5aR4 Rectifier Problem, Help! Little Long
  248. Electrolytic vs Polypropylene cathode
  249. Size of 5Y3 tubes?
  250. 3C24 really is a fine output tube...

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