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  1. soft stat
  2. BJT Bias?
  3. Preamp Squeal
  4. Hammond L101 compensation cap
  5. Powering a headphone amplifier with DC filament supply
  6. new to this
  7. miniblok 1 voltage problem
  8. How will this affect my amp?
  9. Tetra Phono Builders...got problems!
  10. yagoolar's tube amp projects
  11. Base material of GEC KT88 Feb 1960
  12. Headphone amp with 6n2p valve on 12V
  13. pcc189 for audio use
  14. Reading material
  15. 2A3 rectifier
  16. 866a valve test
  17. Anybody in the Knoxville area?
  18. Looking for simple Push-Pull tricks (from Baby Huey) #1
  19. Why wire an output transformer as autoformer ? (parafeed)
  20. Measuring unwanted grid current
  21. Tube companies
  22. Hi Performance Pre amp
  23. HH Scott Type 209 Amp
  24. 6l6gb PP w/fixed bias?
  25. Holy cow! Can anyone tell me why this wire is so pricey?
  26. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  27. 4 x EL84 in UL PP, 470 B+!! is this right
  28. What amp is this?
  29. PS Setup For Testing
  30. OTL designed by Tim Mellow with 4 6C33C?
  31. Quick question on this schematic
  32. Variac, how to ?
  33. Tube data sheets - inaccuracy
  34. Benny's new ForeWatt SRPP pre amplifier
  35. OddWatt PP UL amplifier from scratch
  36. OPT Impedance
  37. Rectifier Valves
  38. WE311 amp
  39. Sherwood S8000 transformers
  40. yaqin MS-12B Search for Diagrams
  41. EICO HF-30 - Schematic
  42. 12AU7 Phono Stage
  43. How to install a motor run capcitor
  44. Sanity check on B+ regulator
  45. 6B4G PPP idea
  46. First OTL breadboarded
  47. New amp build
  48. Tube Parametric EQ - Idea looking for clarification
  49. DHT heater supply
  50. MC/MM Phono Pream PCB
  51. Help Identifying Old Westinghouse Tube Amp?
  52. GM70 SE Amplifier
  53. OPT considerations
  54. Help - the pre amp I made is not working!
  55. Aikido tube connections.
  56. EL34 PP output tranny questions
  57. DC heater voltage 6 volts or 12 volts?
  58. Dynaco st70....Can I use 6 ohm speakers?
  59. Aikido vs. Foreplay
  60. I found a valve amp in my garage...
  61. Separate PSU to Amp connection
  62. cary SLA 70
  63. Help!!! My Audioromy FU29 amplifier was fried!
  64. Help!!! My Audioromy FU29 amplifier was fried!
  65. Take a look at my transformers
  66. miniblok 2 distorted sound
  67. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  68. For hk citation II owners\experts.
  69. Dynakit Mark III amplifier
  70. Transformer in reverse current doubt
  71. CELLINI-2 a hybrid
  72. Need help starting
  73. ARC (Audio Research) VT50
  74. mixed mode bias
  75. 2C52 datasheet
  76. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  77. 12v Tube amp
  78. Is this ok
  79. Help a newbie out with his Sherwood S-800iii
  80. A&R 4008 output transformers
  81. Kulish Circuit
  82. A little digression= read on
  83. Sweep tubes and G3
  84. CCS - Help!
  85. Question About High-Fidelity Magazine 195x - 196x
  86. The Heathkit MA-12 - A Mullard 5-10 In Disguise
  87. who have schematic of Phenix OTL G3?
  88. Drive requirements.....
  89. KT88 hybrid amplifier
  90. 2300 ohm vs 5000 ohm output trans question
  91. Has anyone used this regulator?
  92. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  93. Current mirror circuits
  94. splitter/driver stage
  95. Would someone explain this amp to me please?
  96. What am I experiencing?
  97. 6U10, 6AC10, 6D10, 6AV11
  98. My debut into the vacuum world: Yarland FV34B
  99. Resistor value tweaks for Radford STA35
  100. do you own a chinese tube integrate? does it.... smell?
  101. Needs help to find transformer
  102. 12AU7 / 12AX7 push-pull
  103. Subwoofer connection?
  104. Ultra-low Noise Valve Regulated PSU. How to?
  105. One channel has less glow
  106. 6l6 tube amp troubleshooring progress
  107. Baldwin organ transformers
  108. has anyone used a chip for an input driver to a 2A3 or the like??
  109. Good PSU for HT upt to 15mA??
  110. Edcor transformers have arrived, but really puzzled!
  111. Single tube, Single ended, 20W, impossible?
  112. Stan's Aikido Build
  113. Power transformer rating
  114. 7w 300b vs 350w Car audio observation (car loses)
  115. Seriously considering doing an OTL - but . .
  116. Emulating remote cut off
  117. Cheap Sakura Hybrid Tube Amp Modification
  118. screen tap on OPT
  119. Understanding Cathode Decoupling
  120. How to test interstage transformers?
  121. Modified 6C33C
  122. Counterpoint SA-3.1 Rebuild
  123. 6V6 flare at start up
  124. Tube aging, in-circuit test?
  125. HV Regulator board
  126. What kind of top cap for 6V7G?
  127. High voltage and heat sinks
  128. GM-70 family with top cap anode?
  129. testing 8417's on mercury 1000
  130. 6N3 Tube Preamp with DC-DC converter
  131. Question About Worn Tubes
  132. help ID 4-500 old stock tubes
  133. 6SN7 SRPP preamp
  134. Reduced Heater voltage to reduce noise
  135. ECL82 monoblock 'spud' and a question
  136. Small Tube/SS hybrid amplifier design 9V
  137. Plate load impedance
  138. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  139. Good idle current for NOS 7868's
  140. 6N2P - WHAT THE?????????????
  141. Got an old Westinghouse radio today!!!
  142. Distinction between Driver and Output stages
  143. UL P/P KT88 Class A
  144. Problem with 12ax7 phono stage
  145. Was ist das?
  146. Rset values for IXYS IXTP01N100D
  147. Dutch Book
  148. Tube amplifier chassis damping
  149. How the heck do I solve this problem????
  150. Pentode to Triode Operation
  151. AbouT the PSU II simulator & the "Cockeyed Bridge"
  152. GM70 bias & IT ratio question
  153. Transformer or choke sealed with metal case
  154. Projector 6V6 Tube Amp rats nest p2p
  155. micro pre amp
  156. Aikido - calculating Rk for new tubes
  157. Steady thumping noise in preamp
  158. Leak Stereo 20 hum and buzz problem
  159. 5V AC maining for filaments
  160. Topology for Schade
  161. Thorsten 6SN7 Line stage.
  162. 12v B+ Tube buffer 12AX7
  163. 300B preamp - best operating point
  164. home made tube amp with 12v b+ how to build one?
  165. Engineer's Amp
  166. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  167. FFT for adjusting tubes
  168. Voltage divider instead of expensive volume pot or stepped attenuator.
  169. Long-tail pair phase splitter
  170. LM317 calculator for filament circuit
  171. Self-Biased Cathode Follower Output Point
  172. filaments power supply
  173. Power tube buffer
  174. Easy Way To Reduce 251V to 235V?
  175. EL84 Push Pull 25-30 watts
  176. Exploded view of valves
  177. Show us you COMPACT tube amps !
  178. HV Regulator
  179. Help with my new system
  180. The 3W Hammond 125ASE output transformer
  181. Different brand valves
  182. quad el84 or PP el34
  183. to MC30 or not to MC30
  184. unbypassed cathode resistor
  185. Does this transformer work?
  186. Max grid resistance for GM70?
  187. Parallel pwr supply chokes for add'l current?
  188. Need help to verify Amperex 7119's genuineness
  189. Need help/advice on a problem with console amplifier
  190. Getting started with my VERY FIRST project
  191. PCL Vintage Amp VA1956 - transformer issue
  192. Help to Identify
  193. 300B based preamp....looking for schematic
  194. RH84SE, use as headphone amp ?
  195. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  196. Power triode bias by tube rectifier
  197. Two questions on IR volume control
  198. 25 watt output tube
  199. DC heating my 300b
  200. RNT-900 regulator
  201. KT61 Equivalent - Ping Waveborne
  202. Running a tube without heaters
  203. SE-BAL-SE Switching
  204. What makes is stereo?
  205. Triple Checking Calcs: metering bias with mA meter
  206. EL84 & 12AX7 Amp possibilities
  207. Weird issue with tube driver.
  208. 6E5P
  209. 6B4G / 6S4S Biasing Question
  210. Quick tube wear question
  211. Looking for a tube amp
  212. Internal placing of components
  213. Preamplifiers v power amplifiers
  214. LP2 dht driver
  215. hammond 1650
  216. Load For PSU
  217. *PING* Tubechimp
  218. Revamping of a Michaelson & Austin TVA-1
  219. 6V6 Behavior W/Fixed Bias (SE Amp)
  220. Low noise, low microphony, low hum valves
  221. 6L6 / 12AX7 push-pull
  222. bowei amp for audionote ax-2 speakers?
  223. Yet another Priboi thread...
  224. Help Old Radio Philips
  225. Distortion discussion from mosqueto Hybrid thread
  226. Sovtek 6N1P Microphonics
  227. ECC86 / 6GM8 Radio Receiver Help
  228. Los Angeles
  229. Op point for 6au6/6gu5 in P-G feedback 6550
  230. Tube Pre-Amp Schematic Needed
  231. find a YAQIN 5881a amplifier
  232. 11N90C in the SBCCS circuit
  233. Help replacing a PSU choke - How to choose choke
  234. does this look like a joke to you?
  235. Electronic Choke for Valve Amplifiers
  236. Sockets for a WE429A
  237. To bypass or not to bypass...
  238. DIY Curve Tracer
  239. 300B filament winding center tapped?
  240. help me decide,headphone amp - parafeed or normal tx ?
  241. 7060 vs 6AN8A
  242. Psu
  243. EDCOR Output transformer for 300B
  244. 80 or RGN1064 Scenario
  245. TUBENEWB - Quad KT88 Monoblocks
  246. CCS in Differential phase splitter?
  247. Need schematic for Smart 2x150vt
  248. Antek OPT
  249. 6DQ6 for audio power amp?
  250. Anyone identify this Mullard?

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