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  1. Filament tension spring material
  2. DC coupled SE Schade amp
  3. First build 6V6 based
  4. Failed Converting UL to Pentode!?
  5. 1955 kids record player hum puzzle
  6. subwoofer output from my tube preamp
  7. EL84 SE Amp - specific transformer
  8. "GOOD" backup KT-88
  9. New or Old Output Transformer?
  10. Motorola console recap question
  11. Plate voltage on preamp tube too high
  12. Good valve design calculator website
  13. Ultra-on push-pull tetrode 6550
  14. My introduction to tube amps. The good, the bad, and the ugly.
  15. How do I calculate local feedback %?
  16. Newbie greeting & Resource
  17. Tips/Help With a Dying OTL Headphone Amp
  18. 6B4G and ECC83
  19. Maron buys a tube amp
  20. Newbie
  21. 845 AC filaments, my experience
  22. 8552 finals ?
  23. Low voltage 3W S.E. little amp, need comments and suggestions
  24. Single ended push pull ultra linear or?...
  25. Hello and questions about Magnavox SE amp
  26. Amp identification
  27. Millett DCPP No Output.
  28. using a Hammond 835 interstage ?
  29. Mullard 6SN7GT
  30. RIAA tube pre amp
  31. Cheapo Ebay voltmeter
  32. Jolida SJ202a Schematic
  33. Tetra All in One Phono Preamp voltage
  34. Console pull advice
  35. Local feedback on IT secondary (PP amp)
  36. Is 6w enough and can i use phone power amp?
  37. Yaqin MS-12B preamp - how to get more gain?
  38. Inductor Multiplier Patent
  39. KT90
  40. 6L6GC Hybrid Partial Feedback
  41. 7868 to 7591a conversion help
  42. SOS! 21st Century Regulator Dead!
  43. Transformer Placement - To shield or not to Shield
  44. cap multiplier suggestions wanted
  45. Bridging stereo tube amp to one more powerful mono output
  46. Weird pentode connections
  47. My last S.E. amplifier (pentode driver + Beam Power Tube Ultralinear mode)
  48. Please help info UTC transformer
  49. ARC SP-6B Tube Heaters Glow Very Bright at Startup
  50. SUPER budget DIY tube amp - need help
  51. LEAK TL/12
  52. What decides gain of a valve stage ?
  53. 6AH4 Preamp..A great option for line stage
  54. Kondo M77
  55. 2C22 SRPP
  56. Resistor question
  57. Problem with X10-d as preamp
  58. Pilot One AA-410 1950s
  59. Measuring VAC on coupling cap
  60. Tube phono stage load
  61. ANUBIS - Another Tube-Transistor Hybrid Amplifier
  62. Panasonic HV Electrolitics
  63. Unison Research Smart 845 & dripping sticky goo!
  64. Seeking Danish help to locate two 1950's magazine articles
  65. Valve cruelty ...
  66. Re- calculating RIAA network
  67. Just another cool toy to look at
  68. sherwood s-5000 vs. s-5500 iv OPt's
  69. Sound of 300B SET by Satoru Kobayashi
  70. Using UL taps instead of the anode taps to alter inpedence
  71. Help fast please! Type 3 Ei KT90's - Pre or Post War? How do you know?
  72. 807 PSE schematic design need
  73. 3 direct coupled 2A3 amps
  74. Tube preamplifier with chip power amp
  75. and the quiz identify power trans continue
  76. Valve HT power supply common-mode noise
  77. 12AX7 and 6AS5 tube amplifier
  78. New hands-on tutorial for Tube Newbies
  79. Help me to choose tube "1 no ring" "2 has ring"
  80. Chinese board 6L6 KT88 is it worth???
  81. Valve Rectifier Testing
  82. Harman Kardon TA-120 Output Transformer
  83. Single ended transformer as pushpull?
  84. Resurrecting a nOrh SE9 Integrated Amp
  85. Fisher Amps?
  86. Repurposing an old Gulbransen Organ tube amp
  87. Help, the sound is silken or blow up?
  88. Now here's an idea - The DIYF QUAD
  89. Parallel output SE amp options
  90. What tube is equivalent 5879?
  91. Filament Xfmr: can I trade volts for amps?
  92. GU50 PP possible with this iron ?
  93. Hifi tube amps - overall sound
  94. Preamp grounding questions
  95. Tube rectifiers
  96. DIY PL84 + E180F
  97. McIntosh on How It's Made
  98. Choke input LCLC supply - question on minimum current
  99. EBC3 & CBL1 Tube AMP
  100. CLASS A HYBRID POWER AMP
  101. MXL V69 Mogami Edition signal cuts in/out
  102. Ultra-linear plate characteristic curve for EL34
  103. Need help to modify circuit to suit replacement power XFMR
  104. Line preamp schematic for 5GH8A wanted.
  105. help please - modify phono corrector
  106. Help me: Brimar 5Z4G, 5Y3GT is this an equivalent to a 5Y3WGTA?
  107. A Russian glow tube regulator with specs of 75V 60mA ?
  108. Help with filament for ecc88
  109. How much power transformer is necessary?
  110. testing the 300b tube
  111. Headphone amplifier outputs, so many permutations!
  112. tube footprint in Eagle
  113. Need VTVM repairs
  114. First Timer - DIY Tube Amp
  115. Help identify OT please
  116. gEDA and tubes
  117. Triode Electronics Issues?
  118. RCA BC5B consolette manual?
  119. Help with converting EL37 amp to KT66
  120. treadmill choke
  121. Preamp OPT
  122. Probleme with Volume Pot
  123. Simple SE 6L6 2 watt Homebrew
  124. is 6J32P equivalent of EF806 ?
  125. new tubes vs old ones
  126. 6p36s tube torture.
  127. Questions re: Bypass of B+ to differential amp
  128. Tube choice for yaqin cd3 buffer
  129. yesterday and today
  130. 260VDC need how much VAC transformer, is it 184VAC?
  131. preamp static
  132. Tube Line or Phono Stage bare kit
  133. Grounding of Hammond transformers
  134. Spud Amplifier with 6E5P Tube
  135. need a little help with identification
  136. aikido 12vac help needed
  137. Mullard 3-3 PCB
  138. OTL Using OPT
  139. VA/CF 6SN7 preamp input points?
  140. Copper losses in output transformers
  141. Yaqin MC550 Anyone?
  142. Bigger value output coupling
  143. DIY KT88 SEUL
  144. Leben CS300x feedback loop cap
  145. 6T8 / EABC80 as phase splitter / other uses
  146. Curve Tracer Screen Current
  147. Aikido Cathode Follower preamplifier with remote
  148. Grid Isolation in Fault Conditions
  149. Audio research ls2b parts list
  150. Heathkit USC-1 pre-amp
  151. Counterpoint SA3 Project
  152. Why such a high bias current on output valves ?
  153. how long before new tubes are run in ?
  154. Mullard 5-20 EL34 biasing
  155. Parallel Driver Tubes?
  156. B+ Regulators
  157. Looking for Cary SLP98 Tube Preamplifier Schematic
  158. Hirage Le Monstre equals my best valve amps !
  159. Ran a JJ6v6S at 37 Watts, is it damaged?
  160. Zener diodes as protection clippers
  161. KT120 upgrade from KT88 6550
  162. panasonic dc link capacitors
  163. PTFE covered wire
  164. Grounding Qustion?
  165. New high-Z 1:1 input transformer from Hammond (10k:10k)
  166. Tube amp wiring and temperatures
  167. Pete Millett's Uniamp
  168. 211 tube. more time to brake in or bad tube
  169. Just a thought.
  170. Tube Heater Question
  171. No not Again...Aikido Plate dissipation question
  172. RH amp question!
  173. Mullard 5-20 power supply
  174. b&k 500 tube chart question
  175. Combining two single-ended tube stages for XLR-output - Question
  176. Scope pattern
  177. Diode cathode bias?
  178. Contact Enhancers/Corrosion Inhibitors for Aluminum
  179. My SE 46 tube monoblocks project
  180. E88CC / 6922 Datasheet Limiting Values
  181. Fisher Power Transformers
  182. does someone know about this russia amplifier ?
  183. How to improve this 6B4G push-pull circuit
  184. EL34 UL PP Transformer
  185. sears silvertone medalist stereo amp schematic needed
  186. Led bias on powertubes?
  187. Thermal Runaway
  188. Going from zero to pro tube amplifier. Resources?
  189. DIY Novar Socket
  190. Hum pickup from line output transformers
  191. Photo of a JJ 300B Filaments!! Please! :)
  192. Super FU-29
  193. Questions about Tim Mellow 6C33C OTL
  194. James or Silk for EL36SE?
  195. Dead KT88
  196. MS 110B KT88 INTEGRATED AMPLIFIER
  197. The Mighty 6550...
  198. recomend me some EL34 PLEASE
  199. Adding tone controls
  200. TJ Full Music 2A3/CNE
  201. groove tubes for headphone amp
  202. IXYS LTSpice Models (or something equivalent?)
  203. Soviet 6p3s/6p3s-e
  204. A case of direct coupled cathode follower
  205. SE45 schematic monoblock to stereo help
  206. Heathkit Schematics & Manuals
  207. 211 tube amp problem Help
  208. Department of inapprehensible schematics
  209. How low can you go...?
  210. EL34/6L6 Screen reistors...
  211. 809, anyone played around with them?
  212. Skinny OTL
  213. Adjust drive and output level with one knob
  214. Help me rack some Gates Program Amps
  215. Switch Mode Heater Supply
  216. Pre Ampje
  217. Worried by 110v reading on 6.3v tap....
  218. Safety Alert - UK Yaqin users
  219. 27> EL34 (triode) > 300B
  220. Rockola juke box amp - unusual features
  221. 3.5 watt ECL82 Amp
  222. 12BH7 Headphone Amp
  223. White Cathode Follower Quandary
  224. help in aikido for sennheiser hd580
  225. Home brew more economical than an ST-35
  226. Modeling Pull-Push transformer in LTspice
  227. The Fisher 400-C "Fixer-upper"
  228. Power Transformer question/concern
  229. Nice little schematic drawing app w/ tube symbols
  230. best budget diy kit?
  231. Transconductance amplifier for headphones.
  232. El Cheapo information?
  233. Aikido 9-Pin Configuration
  234. Strange motorboating issue
  235. Lumley M120 Monoblocks - Need Manual, schematic or anything !!!
  236. Substituting higher wattage resistors
  237. cap coupling to interstage transformer or direct coupling?
  238. A question of feedback..
  239. Two Monoblocks "Dying" Within Days Of Each Other
  240. Russian 1Zh24B Pentods / design assistance.
  241. What Tubes for 5.8k PP transformers
  242. Problem with a power transformer.
  243. 300B OTL Preamp/Headphone Amp
  244. tantalum resistors
  245. 6BM8 in STC mode
  246. My Moscode again: What is the bias current?
  247. OTL WCF headphone amp build + awesome prototype material
  248. Type 42 single ended ideas
  249. Help with my Moscode 300 amp
  250. Optimum load impedance for PCL85?

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