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  1. Plate voltage on preamp tube too high
  2. Good valve design calculator website
  3. Ultra-on push-pull tetrode 6550
  4. My introduction to tube amps. The good, the bad, and the ugly.
  5. How do I calculate local feedback %?
  6. Newbie greeting & Resource
  7. Tips/Help With a Dying OTL Headphone Amp
  8. 6B4G and ECC83
  9. Maron buys a tube amp
  10. Newbie
  11. 845 AC filaments, my experience
  12. 8552 finals ?
  13. Low voltage 3W S.E. little amp, need comments and suggestions
  14. Single ended push pull ultra linear or?...
  15. Hello and questions about Magnavox SE amp
  16. Amp identification
  17. Millett DCPP No Output.
  18. using a Hammond 835 interstage ?
  19. Recommendation on versitile tube tester
  20. Mullard 6SN7GT
  21. RIAA tube pre amp
  22. Cheapo Ebay voltmeter
  23. Jolida SJ202a Schematic
  24. Tetra All in One Phono Preamp voltage
  25. Console pull advice
  26. Local feedback on IT secundary (PP amp)
  27. Computerized Curve Tracer Project
  28. Is 6w enough and can i use phone power amp?
  29. Yaqin MS-12B preamp - how to get more gain?
  30. Inductor Multiplier Patent
  31. KT90
  32. 6L6GC Hybrid Partial Feedback
  33. 7868 to 7591a conversion help
  34. SOS! 21st Century Regulator Dead!
  35. Transformer Placement - To shield or not to Shield
  36. cap multiplier suggestions wanted
  37. Bridging stereo tube amp to one more powerful mono output
  38. Weird pentode connections
  39. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  40. Please help info UTC transformer
  41. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  42. SUPER budget DIY tube amp - need help
  43. LEAK TL/12
  44. What decides gain of a valve stage ?
  45. 6AH4 Preamp..A great option for line stage
  46. Kondo M77
  47. 2C22 SRPP
  48. Resistor question
  49. Problem with X10-d as preamp
  50. Pilot One AA-410 1950s
  51. Measuring VAC on coupling cap
  52. Tube phono stage load
  53. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  54. Panasonic HV Electrolitics
  55. Unison Research Smart 845 & dripping sticky goo!
  56. Seeking Danish help to locate two 1950's magazine articles
  57. Valve cruelty ...
  58. Re- calculating RIAA network
  59. Just another cool toy to look at
  60. sherwood s-5000 vs. s-5500 iv OPt's
  61. Sound of 300B SET by Satoru Kobayashi
  62. Using UL taps instead of the anode taps to alter inpedence
  63. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  64. 807 PSE schematic design need
  65. 3 direct coupled 2A3 amps
  66. Tube preamplifier with chip power amp
  67. Anyone used IXCP10M90S ltspice model ?
  68. and the quiz identify power trans continue
  69. Valve HT power supply common-mode noise
  70. 12AX7 and 6AS5 tube amplifier
  71. Working with Eagle and single channel tube amp board.
  72. New hands-on tutorial for Tube Newbies
  73. Help me to choose tube "1 no ring" "2 has ring"
  74. Chinese board 6L6 KT88 is it worth???
  75. Valve Rectifier Testing
  76. Harman Kardon TA-120 Output Transformer
  77. Single ended transformer as pushpull?
  78. Resurrecting a nOrh SE9 Integrated Amp
  79. Fisher Amps?
  80. Repurposing an old Gulbransen Organ tube amp
  81. Help, the sound is silken or blow up?
  82. Now here's an idea - The DIYF QUAD
  83. Parallel output SE amp options
  84. What tube is equivalent 5879?
  85. Filament Xfmr: can I trade volts for amps?
  86. GU50 PP possible with this iron ?
  87. Hifi tube amps - overall sound
  88. Preamp grounding questions
  89. Tube rectifiers
  90. DIY PL84 + E180F
  91. McIntosh on How It's Made
  92. Choke input LCLC supply - question on minimum current
  93. EBC3 & CBL1 Tube AMP
  94. CLASS A HYBRID POWER AMP
  95. MXL V69 Mogami Edition signal cuts in/out
  96. Ultra-linear plate characteristic curve for EL34
  97. Need help to modify circuit to suit replacement power XFMR
  98. Line preamp schematic for 5GH8A wanted.
  99. help please - modify phono corrector
  100. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  101. A Russian glow tube regulator with specs of 75V 60mA ?
  102. Help with filament for ecc88
  103. How much power transformer is necessary?
  104. testing the 300b tube
  105. Headphone amplifier outputs, so many permutations!
  106. tube footprint in Eagle
  107. Need VTVM repairs
  108. First Timer - DIY Tube Amp
  109. Help identify OT please
  110. gEDA and tubes
  111. Triode Electronics Issues?
  112. RCA BC5B consolette manual?
  113. Help with converting EL37 amp to KT66
  114. treadmill choke
  115. Preamp OPT
  116. Probleme with Volume Pot
  117. Simple SE 6L6 2 watt Homebrew
  118. is 6J32P equivalent of EF806 ?
  119. new tubes vs old ones
  120. 6p36s tube torture.
  121. Questions re: Bypass of B+ to differential amp
  122. Tube choice for yaqin cd3 buffer
  123. yesterday and today
  124. 260VDC need how much VAC transformer, is it 184VAC?
  125. preamp static
  126. Tube Line or Phono Stage bare kit
  127. Grounding of Hammond transformers
  128. Spud Amplifier with 6E5P Tube
  129. RAT Tube Tester build
  130. need a little help with identification
  131. aikido 12vac help needed
  132. Mullard 3-3 PCB
  133. OTL Using OPT
  134. VA/CF 6SN7 preamp input points?
  135. Copper losses in output transformers
  136. Yaqin MC550 Anyone?
  137. Bigger value output coupling
  138. DIY KT88 SEUL
  139. Leben CS300x feedback loop cap
  140. 6T8 / EABC80 as phase splitter / other uses
  141. Curve Tracer Screen Current
  142. Aikido Cathode Follower preamplifier with remote
  143. Grid Isolation in Fault Conditions
  144. Audio research ls2b parts list
  145. Heathkit USC-1 pre-amp
  146. Counterpoint SA3 Project
  147. Why such a high bias current on output valves ?
  148. how long before new tubes are run in ?
  149. Latest project, valve stereo disco mixer
  150. Mullard 5-20 EL34 biasing
  151. Parallel Driver Tubes?
  152. B+ Regulators
  153. Looking for Cary SLP98 Tube Preamplifier Schematic
  154. Hirage Le Monstre euals my best valve amps !
  155. Ran a JJ6v6S at 37 Watts, is it damaged?
  156. Zener diodes as protection clippers
  157. KT120 upgrade from KT88 6550
  158. panasonic dc link capacitors
  159. PTFE covered wire
  160. Grounding Qustion?
  161. New high-Z 1:1 input transformer from Hammond (10k:10k)
  162. Tube amp wiring and temperatures
  163. Pete Millett's Uniamp
  164. 211 tube. more time to brake in or bad tube
  165. Just a thought.
  166. Tube Heater Question
  167. No not Again...Aikido Plate dissipation question
  168. RH amp question!
  169. Mullard 5-20 power supply
  170. b&k 500 tube chart question
  171. Combining two single-ended tube stages for XLR-output - Question
  172. Scope pattern
  173. Diode cathode bias?
  174. Contact Enhancers/Corrosion Inhibitors for Aluminum
  175. My SE 46 tube monoblocks project
  176. E88CC / 6922 Datasheet Limiting Values
  177. Fisher Power Transformers
  178. does someone know about this russia amplifier ?
  179. How to improve this 6B4G push-pull circuit
  180. EL34 UL PP Transformer
  181. sears silvertone medalist stereo amp schematic needed
  182. Led bias on powertubes?
  183. Thermal Runaway
  184. Going from zero to pro tube amplifier. Resources?
  185. DIY Novar Socket
  186. Hum pickup from line output transformers
  187. Photo of a JJ 300B Filaments!! Please! :)
  188. Super FU-29
  189. Questions about Tim Mellow 6C33C OTL
  190. James or Silk for EL36SE?
  191. Dead KT88
  192. MS 110B KT88 INTEGRATED AMPLIFIER
  193. The Mighty 6550...
  194. recomend me some EL34 PLEASE
  195. Adding tone controls
  196. TJ Full Music 2A3/CNE
  197. groove tubes for headphone amp
  198. IXYS LTSpice Models (or something equivalent?)
  199. Soviet 6p3s/6p3s-e
  200. A case of direct coupled cathode follower
  201. SE45 schematic monoblock to stereo help
  202. Heathkit Schematics & Manuals
  203. 211 tube amp problem Help
  204. Department of inapprehensible schematics
  205. How low can you go...?
  206. EL34/6L6 Screen reistors...
  207. 809, anyone played around with them?
  208. Skinny OTL
  209. Adjust drive and output level with one knob
  210. Help me rack some Gates Program Amps
  211. Switch Mode Heater Supply
  212. Pre Ampje
  213. Maida Regulator Digital Control
  214. Worried by 110v reading on 6.3v tap....
  215. Safety Alert - UK Yaqin users
  216. 27> EL34 (triode) > 300B
  217. Rockola juke box amp - unusual features
  218. 3.5 watt ECL82 Amp
  219. 12BH7 Headphone Amp
  220. White Cathode Follower Quandary
  221. help in aikido for sennheiser hd580
  222. Home brew more economical than an ST-35
  223. Modeling Pull-Push transformer in LTspice
  224. The Fisher 400-C "Fixer-upper"
  225. Power Transformer question/concern
  226. Nice little schematic drawing app w/ tube symbols
  227. best budget diy kit?
  228. Transconductance amplifier for headphones.
  229. El Cheapo information?
  230. Aikido 9-Pin Configuration
  231. Strange motorboating issue
  232. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  233. Substituting higher wattage resistors
  234. cap coupling to interstage transformer or direct coupling?
  235. A question of feedback..
  236. Two Monoblocks "Dying" Within Days Of Each Other
  237. Russian 1Zh24B Pentods / design assistance.
  238. What Tubes for 5.8k PP transformers
  239. Problem with a power transformer.
  240. 300B OTL Preamp/Headphone Amp
  241. tantalum resistors
  242. 6BM8 in STC mode
  243. My Moscode again: What is the bias current?
  244. OTL WCF headphone amp build + awesome prototype material
  245. Type 42 single ended ideas
  246. Help with my Moscode 300 amp
  247. Thoughts on this volume potentiometer?
  248. Optimum load impedance for PCL85?
  249. Croatian triode Festival 2014.
  250. Old ekco tv transformers

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