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  1. A different type of EL84 SE
  2. Transformer covers; steel or aly?
  3. Opinions on SET transformers for 307a amp
  4. Strange experience with Dynaco ST70 input tubes
  5. Need advice regarding SET 45 Amplifier
  6. "Low" B+ Voltage Amplifiers
  7. Small power all russian tubes single ended amp
  8. Noob question on triode
  9. Can I mount Plate chokes next to OPTs???
  10. R-3389A Schematic?
  11. tube baxandall tone control potentiometer resistance value
  12. Can you help me identify these burned resistors?
  13. Do i have a problem with my DC filaments?
  14. Recommendations please. Octal sockets.
  15. metal can capacitors
  16. Dynaco Mark IV selenium rectifier replacement
  17. Elekit 8200 Tube rolling
  18. Girlfriend Wants to Build One
  19. Moskido Hybrid Aikido-MOSFET Amplifier
  20. Modified ST70 with extra tube sockets?!?!
  21. Wanted: ExpressPCB component layout for 7 pin socket
  22. Eliminating balance controls on Eico st70
  23. APPJ PA0901A anyone?
  24. 90wpc from push pull KT88?
  25. Help guessing amplifier model
  26. unusual SET amp design, your thoughts please
  27. Siemens e83cc Long plate triple mica?
  28. Help identafying 2 Output Transoromers?
  29. Tube Rectified Power Supplies
  30. Audio Nirvana 300B SET amp.
  31. Plotting plate curves past dissipation limit
  32. Massive Old Console... Repair or gut and replace with modern stuff?
  33. Tap Cap?
  34. OLD vs NEW tube amplifier circuits
  35. Who Made These Amps.
  36. An Amp oddity
  37. Linyun 300B Luxury edition
  38. Can plate chokes be THAT different?
  39. Pye HF25 Tube Monoblocks: Restoring Legends
  40. Millett Hybrid headphone amp.
  41. 6n2p-ev
  42. Idea for driver for CF output stage
  43. Problem with KT88 Williamson LTSpice simulation
  44. voltage regulator tubes
  45. Input impedance of grounded grid stage?
  46. tube upgrade benefits , worth the money ? 6R3S-1 , EF86
  47. Riaa MM high gain, low impedance.
  48. increase live 211 tube
  49. Need help with OPT for Loewe Opta Apollo Stereo
  50. Potentiometer & Power Switch Help
  51. Audio Note M2 Riaa.
  52. Is it the end of Blackburn Microtech tubes?
  53. Please critique my PSU design
  54. Audio Novice
  55. What vintage gear to source for tubes and transformers?
  56. 6n6p source
  57. (2) 6AV6 instead of 12ax7
  58. Preamp mod with tone control - comment please
  59. Roland branded 12AX7 tube?
  60. Questions about updates/upgrades
  61. When doubling output-tubes: What needs to be considered ?
  62. Audio Research SP-10 help needed
  63. Safety Tip For The Day
  64. PSU Output: Tubecad PS-1 Question
  65. Micro Channel Plate (MCP) audio amplifier
  66. bell mod 2445
  67. found a vintage dynacord concert el84 amp
  68. Stability problems, help please?
  69. Do I NEED to bring up an old amp on veriac?
  70. 6P15 / EL84 Sort of Para-Feed, Cathode-Drive, Hybrid
  71. Crosstalk L-R. Acceptable levels?
  72. Yaqin MS MC - 30L Amp
  73. www.pimmlabs.com not available
  74. vibration resistant preamp tube
  75. Direct Heated Valve in Series - Channel Separation Question
  76. So i was going into Tosche Station to pick up some power converters . . .
  77. a sub crossover idea
  78. Understanding power supply
  79. 12AX7 Class 2 (Positive Grid Voltage) Operation
  80. All triode 250 watt western electric
  81. Telefunken EL34 data sheet
  82. Using a 6J1 tube amp as a final stage?
  83. Anyone use 872-A Mercury Vapor Rectifier Tube
  84. Need recapping tube radio advice
  85. Thinking about getting Philco model 14
  86. Mixed Bias for an EL34 ? Any recommendations / experience ?
  87. PP oscillation with toroid output transformer
  88. 6B4G New Amp Build Issue
  89. Mable Audio 300B Amp KitI
  90. Help me understand - 7061 vs. 12ab5 (and the rest of the 6V6 family)
  91. ebay seller jellyfishaudio
  92. 866a rectifier on 6.3vct@10A
  93. Vintage tube preamp design
  94. Output Transformer Wiring
  95. Ground loop problems
  96. Reversed preamp OPT as IPT
  97. A2 p-p with Millett driver
  98. DC filament supply schematic
  99. Mystery tube
  100. 6eu7/6bq5 feedback question
  101. Ultimate Ultralinear Amp...please help to understand...
  102. Mullard 20 Watt Amp
  103. Transformer feedback winding: Tamura HN-1
  104. the big one
  105. ECC33 vs 6SN7 - Implications I should know?
  106. What is a Source Measure unit (SMU)?
  107. Building a tube amp from scratch
  108. Priboj (priboi) 50, small problem (SOVIET TUBE AMP)
  109. Kellogg (Dukane?) Tube PA Amp
  110. APPJ PA1501
  111. New production 6L6GC tubes and similar
  112. Knight 10W 6V6 push-pull tube power amp
  113. 480vct at 50VA for less than $12 shipped
  114. Pioneer SA-81 integrated tube amp
  115. 12B4 Preamp Design/Pre-build Questions
  116. Can I mount a 5R4WGA at a 10 degree angle?
  117. plate current variation with fixed bias
  118. 5693 issue
  119. Hum SOLVED!!!!
  120. Garage System Control/Preamp idea
  121. Aikido Octal line stage kit info needed
  122. Phonola suitcase player...now, with hum!
  123. My latests (well ... first) RIAA preamp
  124. 12at7 one side drawers 10% more current
  125. Upgrade output transfomers, EL34 single-ended
  126. cleaning tubes / valves
  127. a simple (I think) Baxandall question
  128. Paoli Model 60M help
  129. Should something be done about these traces?
  130. 300(may)B(e) - Recs & Advice
  131. LNF in gain stage or CF?
  132. KT77 at 790 V
  133. Newb question about tube socket placement
  134. my first tube amp project
  135. Unusual Schematic help
  136. 12AX7 vs 12AT7 vs 12AU7
  137. 6SN7 Distortion Canceling in Amp
  138. D-115 w/ weak channel
  139. MOSFET Follower Choices
  140. Sanity check my unlabeled transformer guesstimates? Fisher X-200 power trafo
  141. Mystery Tube Time
  142. PSU simulation help
  143. Vacuum tubes and wire wrap
  144. LTP phase splitter as output stage?
  145. Swap 6B4G for 6SL7 SRPP ?
  146. Need Fuse Values for 6922 Tube Premp, 6.3v & B+ Fuse Value
  147. 12AX7 tone control with low B+ voltage
  148. Cathodefollower and strange behaviour with lowering of anode voltage.
  149. Early Audio Research Dual 100 Schematic?
  150. current drive
  151. Bench Supply
  152. 6X5 GT Hybrid rectifier
  153. small shrouded PP OPT choices ?
  154. Single triode instead of double triode?
  155. Low noise valve tube circuit ideas for cassette deck
  156. Found a box of various 9 pin tubes....
  157. 12AU7 internally matched triodes
  158. Homemade tube socket adaptor
  159. Who's mark was on this obvious 6n23p?
  160. Thoughts on amp mods
  161. Just a quick thanks to you guys
  162. Low voltage tube line preamp
  163. What the difference between 6H7C & 6H8C tubes
  164. Headphone amp OTL
  165. Recommend design for low cost DIY valve amp
  166. need help with short
  167. Simple 1-device gyrators
  168. Need assist - Melos 110 Preamp
  169. Bad capacitor?
  170. Does someone has info about this tubes ?
  171. 2c26a
  172. Help identifying vintage tube amp connector
  173. What make is this E88CC ?
  174. Valve amp - vanishing bass
  175. 5Z3P 6N9P EL34B SE amplifier
  176. Wrapping my head around cathode followers. Does this explanation make sense?
  177. HK A500 rebuild
  178. LS7B Marantz 7 Clone PreAmp
  179. SS to drive 300b
  180. is the 12ax7 ever used on television sets?
  181. What topology was this old RCA power transformer designed for?
  182. BOM of Audio Research SP-11 MkII and D-115 MkII
  183. ECC88/6DJ8 at higher Va
  184. Valve headphone amp humming through headphones
  185. Merlin's new hi-fi valve preamp book is released
  186. Screen Drive 6BQ6GT Amp - Feasibility Study
  187. Harmon Kardon A50K project
  188. Reading high V through resistor/cap casings
  189. Troubleshooting magnavox 9302-00
  190. Vintage 1990's Audio Note 2k5 output transformer wiring color code
  191. Splitting the audio band into two transformers
  192. 21LG6/A P-P for 50+ watts?
  193. Anyone use an IEC line filter plug??
  194. pre Line 2 end Line 3
  195. NEW D3a equivalent on marked?
  196. Anyone tried Plitron transformers?
  197. Summing channels;Why? JE EL34
  198. TAJ's Harman Kardon Citation V rebuild thread
  199. Screened/shielded cables in chassis
  200. Cascode question re shunt to lower tube
  201. LED biasing in preamp - cap in parallel required?
  202. Can you identify these tube amplifiers? 4x807 & mercury vapor rectifiers
  203. Amperex BB ECC82 - Real or Fake?
  204. Max screen grid voltages in datasheets
  205. Tube rectifiers
  206. VT-25/10Y tubes
  207. Does anyone have the schematic for Transcendant Sound Mini Beast?
  208. Schematic help please
  209. Faulty rectifier valve possibly damaged my amplifier - help
  210. 6J1 tube buffer circuit diagram
  211. Filament transformer question
  212. Grundig 9060 output transformer identifying
  213. 6J1 biasing inconsistencies with datasheet
  214. Separate transformer for heaters. How to reference this to ground?
  215. 300B alternatives
  216. Stereo to Mono transformer based 'hybrid/bridging mixer'
  217. LK-48 over voltage
  218. Aikido all in one
  219. Bitsa Amp project
  220. Search for thread/article about phono preamp design
  221. Fusing valve amps
  222. AIKIDO line stage
  223. Cossor 61SPT - any experience?
  224. 6BG6GA PP, -bias, Amp built but couple problems
  225. GE 6sn7 made in Italy
  226. First SE Amp Build
  227. HV soft start
  228. Setup Question (do I really need the gain from a preamp)
  229. Your opinions please
  230. design advise
  231. Interpolation Oscillator
  232. audio note oto
  233. A small resonant HV converter: Q-Conv
  234. Iv got a 100w OPT That needs a circuit
  235. Powerful tube amp / unmatched tubes in parallel
  236. Need help: I have 807s and the guts from a HK AA-100
  237. SE EL34 and speakers
  238. 6AK10 LTP with CCS question
  239. Is a heater voltage of 6.7 cause for concern?
  240. Tube guards/cage for Elekit TU-8200
  241. ming da mc 845 aa modification
  242. How good can this headphone amp/pre amp be?
  243. Zero Bias Solution?
  244. Cathode Degeneration with CCS plate load- My Mistake
  245. Pilot 240 with too much bass-- circuit modification needed?
  246. EL34 DIY "centre-tapped" tube ??
  247. Advice for Super Cheap & Simple 829b based amp from spare parts
  248. Infineon IPA50R140CP N-channel mosfet
  249. Borberly Op amp 4 Tube Mosfet hybrid
  250. Splitting Power Supply Choke Question

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