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  1. Srpp simple explanation
  2. Driver for a 807 em triode mode...help !!!
  3. 6J6-based SSMH?
  4. Small tube amp based on 6N6P
  5. replacement for Ei 12BH7AEG
  6. Preamp input tube noise
  7. How much is too much for a 6L6GB?
  8. What is the proper way to measure transformer inductance?
  9. Audio Research LS8 mod. to MKII
  10. Futterman stage max input
  11. Pushing 6p14p too hard
  12. Who can tell me in Rome where can i buy antique Vacuum tube?
  13. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  14. Priboi biasing
  15. Whither Westrex ?.
  16. Tube Phono Pre-Amplifiers
  17. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  18. DIY tube amps for surround sounds?
  19. Rotary switch for attenuator
  20. What is Matise circuit?
  21. 6bq5 red plating
  22. Technical questions about Melos MA-333
  23. idiot proof mono push pull 6l6gc schematic wanted
  24. Passive Preamp Mod help
  25. KT77 OPT impedance
  26. i think i'm thru with 2A3 tubes
  27. VTC4U? Is that the name of the tube tower/shroud seller?
  28. 8417 triode el.. Mod??'s
  29. Gramp's Zenith MLT 15
  30. Class A tube amplifier Kit
  31. IERC tube coolers for EL34 on the Bay
  32. Stromberg Carlson ASR 433
  33. quads11&22 back into service
  34. New Tubes for sale
  35. Best design for Lundahl LL1679/PP
  36. 12U7 LTP vs. 6922 cascode
  37. Need help calculating value of balancing resistors
  38. 12ax7 12au7 preamp
  39. Western Electric 471A...any information ?
  40. Please Reply
  41. tube line preamplifier circuit
  42. 6L6 Ultralinear cathode Follower
  43. Grid current operation
  44. 431 based screen supply
  45. Where did all the money go?
  46. Hyperx soft start any good for valve amp situation?
  47. Class AB2, Class B, and Hifi
  48. PP 6b4g bad / distorted channel diagnostics
  49. Transformer usage ??
  50. Phono Amplifier
  51. Need EL84 Brand Identification
  52. RCA Octagon dating
  53. Most Accurate Bias Testing Method
  54. ASL AQ1003DT schematic or manual?
  55. Penta brand 6L6GC info?
  56. Mod to SE 6SN7 - 6V6 amp
  57. adjust filament ECC82/83
  58. Clear out of old valves - advice needed
  59. Help ID this OPT
  60. Help? 6n23p cathode follower
  61. DC Heater Caps
  62. Load Line and Biasing for Class AB 6550 power amp
  63. Amp project help needed
  64. LTP with CCS and feedback
  65. Clarion simple 2A3 amplifier
  66. Another question about plate curves and pentode load lines
  67. 5V Indrect Heated Rectifiers?
  68. Easy CCS
  69. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  70. First watt F2/little dot MK III
  71. Old Motorola console tube amp, fuse problem
  72. How much performance difference w/ this config?
  73. 6P8S datasheet, help !!
  74. DHT IMD
  75. How to calculate OPT transformer windings
  76. Newbie Questions
  77. Building a Harmonic Distortion Generator
  78. plate curves and max ratings questions
  79. Heater-cathode DC conduction resistance
  80. EL 84 Capacitor Equivalent
  81. How do they get away with this?
  82. well-loved Sherwood "popping" prob mouse pee
  83. Tube Newb: 12sn7 and 12sl7 interchangeable?
  84. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  85. sonic frontiers sfm-75
  86. Chinese tube amp mods?
  87. PSU for JE Labs Simple 45/2A3
  88. frustrated ,Bought a 845 NOS - springs are discconnected need help
  89. Running water sound in amp
  90. Peerless 16458 output transformers
  91. Noisy high-gain preamplifier
  92. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  93. 2A3 single plate RCA/Cunningham tube prices
  94. output transformer power rating
  95. Rectifier Foward Voltage?
  96. Help With 6Y6 amp
  97. What are 12AT7/ECC81 power drivers ?
  98. Help with these Russian GU50 tube amplifier
  99. Eico ST-70 Supermods
  100. Mullard PZ30, how's its Peak Inverse Voltage?
  101. 12AU7 in cascode configuration
  102. Bad tube in old record player?
  103. check this out glas-fiber cartridge
  104. cathode caps
  105. Aikido HV PSU
  106. Distance between 6N23P and a cap?
  107. solid and strand wire in amp
  108. Phillips Music Sudio
  109. LTPI Grid stopper value affect on harmonics
  110. WTF. What's going on here.
  111. 7-pin pcb mount socket with shield?
  112. SIMPLE remote volume control with alps motorized pot
  113. Hybrid Partial Feedback SE Amplifier
  114. HV +B Connector
  115. Eico experts needed: PEC in 2050 driver stage bad
  116. Best sounding linestage/buffer topology?
  117. Using ECC88
  118. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  119. EL34 cathode bias PA
  120. Tube Amp Art
  121. Quick OT Question
  122. Power Transformer
  123. ampex 354? some questions
  124. Good power Filter Capacitors
  125. Fisher 101d blow fuse
  126. Jolida 502A lost output...?
  127. Codename "Tapyrus", my ongoing DIY headphone amp
  128. RIAA preamp with DHTs
  129. Dynaco Mark VI feedback values
  130. Eagle PCB
  131. Ode to Tube Rollers
  132. switching tubes: good or bad idea?
  133. COnn Organ Amp DI266 Info 12v6GT tubes
  134. Please help me figure out why my plate voltage is too high here
  135. Yaqin MC10L Question for the Guru's
  136. PP PSU: How much ripple is too much ripple?
  137. Bypass caps in choke PS
  138. Grounded Grid TRANSCENDENT line stage
  139. Battery Powered Tube Amp
  140. 5Z4PJ 6N2J
  141. Almost there! opinions are welcomed(6C33SET)
  142. Speaker impedance and amp matching?
  143. r core or toroidal output trafo for dynaco st70
  144. Heathkit Returns
  145. How to get started
  146. WANTED: schematic for Eico 2050 Classic Series
  147. winding an output transformer
  148. 12AX7 vacuum tube pre-amp?
  149. motor 'defeat' switch for echoplex/etc
  150. Audionote kit L4 and L6
  151. class a audio amplifier 5w with ic ne5532
  152. Fate of my Heathkit W7-M amplifiers
  153. Trying to get my B&K 500 up and running.
  154. Newcomb E-10B Amplifer
  155. Telefunken RV218 power triode
  156. Crowhurst High Power vs Low Power Amplifiers
  157. Duncan amps PSU designer II help
  158. damper diodes
  159. EL12N in JCM800 clone
  160. Amp design exercise, mentorship needed...
  161. Need help with series filament 25l6GT amp
  162. Dynakit Mark IV Oscillation
  163. Telefunken C3M data
  164. Can a tube guru help with nu>lambda conversions?
  165. plate dissipation vs brand
  166. Solid-state replacements for PAS2/3 rectifiers?
  167. first integrated amp
  168. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  169. st70A mod.kit
  170. Grampian 600u
  171. Suggest amp to drive mangnapan SMGa/MMG
  172. Valve DI box
  173. Yaqin Tube Amplifier
  174. Jensen JT-11P-1 on tube amp input
  175. Amperex PQ 6922 code decifering?
  176. 12ax7 driving a DHT out, why not?
  177. unknown Rogers Pre Power
  178. Mic pre question
  179. power tube power scaler
  180. Tube Rectifier with transformer without Center tap
  181. Can I use this stuff (does it have any value?)
  182. Full regulated power supply for 12au7(preamp)
  183. 6C33 OTL Circlotron
  184. Unknown output transformer
  185. Building a tube pre/amp copy (6V6)
  186. 6922 pin i.d.
  187. KT88 Push Pull Amp using transistor driver stage
  188. 45 DHT HT Supply oscillating - help!
  189. exceeding plate voltage of the output tube
  190. Fisher 101D
  191. Looking for old amp info
  192. Restoring an old tube amp
  193. Noob Tube Preamp Finished Kit Transformer HOT!
  194. the tv underrated tubes
  195. Headphone Amp
  196. What is needed to drive 86db speakers and sound *good*?
  197. ef86 - plate voltage
  198. Output signal distortion
  199. Minimum Acceptable Gm
  200. Anyone have experience with the 6SD7GT tube ?
  201. Identifying an ultralinear OPT
  202. A good sounding EL34 PP sch please
  203. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  204. ST-35 First Build
  205. Identifying EL34 tube?
  206. Solid state relais in stean of standby swtich
  207. $75 tube amp kit on eBay???
  208. Power supply RC (ohm's law) question -NEWBIE ALERT
  209. variable power control
  210. reccommend a voltage doubler for bias?
  211. Point to Point build tips
  212. ecf82 pentode instead of ef86
  213. K-12G vs. K-502
  214. eq in a tiny Directly Heated Cathode amp
  215. Anyone ever try 6C33C SE with Aikido drive?
  216. Help with 1:2 line level input Tx's
  217. 112a preamp need comment please
  218. Excellent (Modified) Williamson Treatise
  219. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  220. Chicago BO-14 100w amp
  221. volume pot question, help.
  222. Simple B+ delay circuit for tube power amp?
  223. My small tube does it work?
  224. Approaching the best primary impedance on low or high side?
  225. CT Trafo and floating psu for circlotron?
  226. Unknown tube, need help to identify!
  227. 6L6 guidance needed
  228. Output Power Question
  229. Can the 7AK7 computer tube work as audio output tube ?
  230. Burned in Power Tubes?
  231. Driver Match for K-12G TubeAmp
  232. KT90 to KT88 with autobias
  233. SRPP DC working condition for Rk1=2Rk2
  234. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  235. the 'sound' of a CF
  236. Found iron recycling - what possible uses?
  237. Class AB PP - is it any good ?
  238. Stereo to mono by paralleling outputs?
  239. BOX in the making
  240. How about paralleling output tubes
  241. Are they basically Borbely hybrid circuitry?
  242. Service Life at Low Plate Current
  243. Sophia Electric SE Transformers for 813 "Super Schade"
  244. 10W suitcase amp
  245. PP OT made of 2 transformers
  246. If I change B+ do I have to change the circuit?
  247. PhonoDude
  248. Lafayette Phono/Reverb /Center channel amp
  249. Seller recommendation needed.
  250. Jeffrey's Super Circlotron (hybrid)

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