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  1. E180F Preamp
  2. Don Allen Amp's ????
  3. To connect or not to connect..........
  4. Phonostage with tube moving coil
  5. 300b tube Temperature?
  6. Center tap transformer for elevated heater supplies
  7. single ended kt88 fuse blowing after an hour
  8. Help getting more gain from a Peavey Butcher
  9. Radiotron question
  10. suggested use for old telefunken tubes
  11. Using different ouputs for two different drivers
  12. Pete Millett Uniamp with 300b
  13. Cary slp-70
  14. How to combine 2 signals from 2 gain stages
  15. Increase B+ supply
  16. Aikido Tetra Sans Phono PCB
  17. Loadlines and distortion (6S33S/6S41S)
  18. home theatre bypass feature
  19. Doubling the power of hifi tube amplifiers
  20. Can this tube be used in audio amplifier?
  21. 100 V OPT
  22. Help me understand tube chart data
  23. Listening preference....
  24. tube socket legs?
  25. Stand alone gain stage pre-amp
  26. I kinda sorta burned up my K12-G power transformer
  27. RCA-182 Tube Amp
  28. Transformer potting material? what material?
  29. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  30. tube amp/pre in car?
  31. Thorsten's tube Stage for TDA1541A
  32. Please help me identify these .45 3kv TRW caps
  33. Convert Gates pre-amp to DC filament?
  34. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  35. how much C is too much C?
  36. fisher 70AZ
  37. RE: My first attempt at using Tube Cadd
  38. Srpp simple explanation
  39. Driver for a 807 em triode mode...help !!!
  40. 6J6-based SSMH?
  41. Small tube amp based on 6N6P
  42. replacement for Ei 12BH7AEG
  43. Preamp input tube noise
  44. How much is too much for a 6L6GB?
  45. What is the proper way to measure transformer inductance?
  46. Audio Research LS8 mod. to MKII
  47. Futterman stage max input
  48. How important is ESR in PS Caps?
  49. Pushing 6p14p too hard
  50. Who can tell me in Rome where can i buy antique Vacuum tube?
  51. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  52. Priboi biasing
  53. Whither Westrex ?.
  54. Tube Phono Pre-Amplifiers
  55. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  56. DIY tube amps for surround sounds?
  57. Bad solder joints in Fender Deluxe VM
  58. Rotary switch for attenuator
  59. What is Matise circuit?
  60. 6bq5 red plating
  61. Technical questions about Melos MA-333
  62. What's this in old Fender amps?
  63. idiot proof mono push pull 6l6gc schematic wanted
  64. Passive Preamp Mod help
  65. KT77 OPT impedance
  66. i think i'm thru with 2A3 tubes
  67. VTC4U? Is that the name of the tube tower/shroud seller?
  68. 8417 triode el.. Mod??'s
  69. Gramp's Zenith MLT 15
  70. Class A tube amplifier Kit
  71. IERC tube coolers for EL34 on the Bay
  72. Stromberg Carlson ASR 433
  73. quads11&22 back into service
  74. New Tubes for sale
  75. Best design for Lundahl LL1679/PP
  76. 12U7 LTP vs. 6922 cascode
  77. Need help calculating value of balancing resistors
  78. 12ax7 12au7 preamp
  79. Western Electric 471A...any information ?
  80. Please Reply
  81. tube line preamplifier circuit
  82. 6L6 Ultralinear cathode Follower
  83. Grid current operation
  84. 431 based screen supply
  85. Where did all the money go?
  86. Hyperx soft start any good for valve amp situation?
  87. Class AB2, Class B, and Hifi
  88. PP 6b4g bad / distorted channel diagnostics
  89. Transformer usage ??
  90. Phono Amplifier
  91. Need EL84 Brand Identification
  92. RCA Octagon dating
  93. Most Accurate Bias Testing Method
  94. ASL AQ1003DT schematic or manual?
  95. Penta brand 6L6GC info?
  96. Mod to SE 6SN7 - 6V6 amp
  97. adjust filament ECC82/83
  98. Clear out of old valves - advice needed
  99. Help ID this OPT
  100. Help? 6n23p cathode follower
  101. DC Heater Caps
  102. Load Line and Biasing for Class AB 6550 power amp
  103. Amp project help needed
  104. LTP with CCS and feedback
  105. Clarion simple 2A3 amplifier
  106. Another question about plate curves and pentode load lines
  107. 5V Indrect Heated Rectifiers?
  108. Easy CCS
  109. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  110. First watt F2/little dot MK III
  111. Old Motorola console tube amp, fuse problem
  112. How much performance difference w/ this config?
  113. 6P8S datasheet, help !!
  114. DHT IMD
  115. How to calculate OPT transformer windings
  116. Newbie Questions
  117. Building a Harmonic Distortion Generator
  118. plate curves and max ratings questions
  119. Heater-cathode DC conduction resistance
  120. EL 84 Capacitor Equivalent
  121. How do they get away with this?
  122. well-loved Sherwood "popping" prob mouse pee
  123. Tube Newb: 12sn7 and 12sl7 interchangeable?
  124. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  125. sonic frontiers sfm-75
  126. Chinese tube amp mods?
  127. PSU for JE Labs Simple 45/2A3
  128. frustrated ,Bought a 845 NOS - springs are discconnected need help
  129. Running water sound in amp
  130. Peerless 16458 output transformers
  131. Noisy high-gain preamplifier
  132. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  133. 2A3 single plate RCA/Cunningham tube prices
  134. output transformer power rating
  135. Rectifier Foward Voltage?
  136. Help With 6Y6 amp
  137. What are 12AT7/ECC81 power drivers ?
  138. Help with these Russian GU50 tube amplifier
  139. Eico ST-70 Supermods
  140. Mullard PZ30, how's its Peak Inverse Voltage?
  141. Optical compressor project
  142. 12AU7 in cascode configuration
  143. Bad tube in old record player?
  144. check this out glas-fiber cartridge
  145. cathode caps
  146. Aikido HV PSU
  147. Distance between 6N23P and a cap?
  148. solid and strand wire in amp
  149. Phillips Music Sudio
  150. LTPI Grid stopper value affect on harmonics
  151. WTF. What's going on here.
  152. 7-pin pcb mount socket with shield?
  153. SIMPLE remote volume control with alps motorized pot
  154. Hybrid Partial Feedback SE Amplifier
  155. HV +B Connector
  156. Eico experts needed: PEC in 2050 driver stage bad
  157. Best sounding linestage/buffer topology?
  158. Using ECC88
  159. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  160. EL34 cathode bias PA
  161. Tube Amp Art
  162. Quick OT Question
  163. Power Transformer
  164. ampex 354? some questions
  165. Good power Filter Capacitors
  166. Fisher 101d blow fuse
  167. Valco Model 1200 help
  168. Jolida 502A lost output...?
  169. Codename "Tapyrus", my ongoing DIY headphone amp
  170. RIAA preamp with DHTs
  171. Dynaco Mark VI feedback values
  172. Eagle PCB
  173. Ode to Tube Rollers
  174. switching tubes: good or bad idea?
  175. COnn Organ Amp DI266 Info 12v6GT tubes
  176. Please help me figure out why my plate voltage is too high here
  177. Yaqin MC10L Question for the Guru's
  178. PP PSU: How much ripple is too much ripple?
  179. Bypass caps in choke PS
  180. Grounded Grid TRANSCENDENT line stage
  181. Battery Powered Tube Amp
  182. 5Z4PJ 6N2J
  183. Almost there! opinions are welcomed(6C33SET)
  184. Speaker impedance and amp matching?
  185. r core or toroidal output trafo for dynaco st70
  186. Heathkit Returns
  187. How to get started
  188. WANTED: schematic for Eico 2050 Classic Series
  189. winding an output transformer
  190. 12AX7 vacuum tube pre-amp?
  191. motor 'defeat' switch for echoplex/etc
  192. Audionote kit L4 and L6
  193. class a audio amplifier 5w with ic ne5532
  194. Fate of my Heathkit W7-M amplifiers
  195. Trying to get my B&K 500 up and running.
  196. Tubelab simple SE ideas
  197. Newcomb E-10B Amplifer
  198. Telefunken RV218 power triode
  199. Crowhurst High Power vs Low Power Amplifiers
  200. Duncan amps PSU designer II help
  201. damper diodes
  202. EL12N in JCM800 clone
  203. Amp design exercise, mentorship needed...
  204. Need help with series filament 25l6GT amp
  205. Dynakit Mark IV Oscillation
  206. Telefunken C3M data
  207. Can a tube guru help with nu>lambda conversions?
  208. plate dissipation vs brand
  209. Solid-state replacements for PAS2/3 rectifiers?
  210. first integrated amp
  211. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  212. st70A mod.kit
  213. Grampian 600u
  214. Suggest amp to drive mangnapan SMGa/MMG
  215. Valve DI box
  216. Yaqin Tube Amplifier
  217. Jensen JT-11P-1 on tube amp input
  218. Amperex PQ 6922 code decifering?
  219. 12ax7 driving a DHT out, why not?
  220. unknown Rogers Pre Power
  221. Mic pre question
  222. power tube power scaler
  223. Tube Rectifier with transformer without Center tap
  224. Can I use this stuff (does it have any value?)
  225. Full regulated power supply for 12au7(preamp)
  226. 6C33 OTL Circlotron
  227. Ammeter connection for Tubelab SE
  228. Unknown output transformer
  229. Building a tube pre/amp copy (6V6)
  230. 6922 pin i.d.
  231. KT88 Push Pull Amp using transistor driver stage
  232. 45 DHT HT Supply oscillating - help!
  233. exceeding plate voltage of the output tube
  234. Fisher 101D
  235. Tubes and Eagle3D
  236. Looking for old amp info
  237. Restoring an old tube amp
  238. Noob Tube Preamp Finished Kit Transformer HOT!
  239. the tv underrated tubes
  240. Headphone Amp
  241. What is needed to drive 86db speakers and sound *good*?
  242. ef86 - plate voltage
  243. Output signal distortion
  244. Minimum Acceptable Gm
  245. Anyone have experience with the 6SD7GT tube ?
  246. Identifying an ultralinear OPT
  247. A good sounding EL34 PP sch please
  248. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  249. ST-35 First Build
  250. Identifying EL34 tube?

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