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  1. 4 x EL84 in UL PP, 470 B+!! is this right
  2. What amp is this?
  3. PS Setup For Testing
  4. OTL designed by Tim Mellow with 4 6C33C?
  5. Bassman 100 schematic questions
  6. Quick question on this schematic
  7. Variac, how to ?
  8. Tube data sheets - inaccuracy
  9. Benny's new ForeWatt SRPP pre amplifier
  10. OddWatt PP UL amplifier from scratch
  11. OPT Impedance
  12. Rectifier Valves
  13. WE311 amp
  14. Sherwood S8000 transformers
  15. yaqin MS-12B Search for Diagrams
  16. EICO HF-30 - Schematic
  17. 12AU7 Phono Stage
  18. How to install a motor run capcitor
  19. Sanity check on B+ regulator
  20. 6B4G PPP idea
  21. First OTL breadboarded
  22. New amp build
  23. Tube Parametric EQ - Idea looking for clarification
  24. Peavey Valveking 100- static sound during warm-up
  25. My Fender Twin Amp Not Working - get your guesses in
  26. DHT heater supply
  27. MC/MM Phono Pream PCB
  28. Help Identifying Old Westinghouse Tube Amp?
  29. GM70 SE Amplifier
  30. OPT considerations
  31. Help - the pre amp I made is not working!
  32. Aikido tube connections.
  33. EL34 PP output tranny questions
  34. DC heater voltage 6 volts or 12 volts?
  35. Dynaco st70....Can I use 6 ohm speakers?
  36. Aikido vs. Foreplay
  37. I found a valve amp in my garage...
  38. Separate PSU to Amp connection
  39. cheep miniure meters
  40. cary SLA 70
  41. Help!!! My Audioromy FU29 amplifier was fried!
  42. Help!!! My Audioromy FU29 amplifier was fried!
  43. Take a look at my transformers
  44. input transformer for Simple SE Tubelab amp
  45. miniblok 2 distorted sound
  46. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  47. For hk citation II owners\experts.
  48. Dynakit Mark III amplifier
  49. Transformer in reverse current doubt
  50. CELLINI-2 a hybrid
  51. Need help starting
  52. ARC (Audio Research) VT50
  53. mixed mode bias
  54. 2C52 datasheet
  55. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  56. 12v Tube amp
  57. Is this ok
  58. 12ax7 Bass Preamp Power Supply Question.
  59. Help a newbie out with his Sherwood S-800iii
  60. A&R 4008 output transformers
  61. Kulish Circuit
  62. A little digression= read on
  63. Sweep tubes and G3
  64. CCS - Help!
  65. Another odd-ball PA amplifier
  66. 25W with 2xEL86(6CW5)!
  67. Question About High-Fidelity Magazine 195x - 196x
  68. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  69. who have schematic of Phenix OTL G3?
  70. CHAMP8 with ECLL800
  71. Drive requirements.....
  72. KT88 hybrid amplifier
  73. 2300 ohm vs 5000 ohm output trans question
  74. Has anyone used this regulator?
  75. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  76. Current mirror circuits
  77. splitter/driver stage
  78. Would someone explain this amp to me please?
  79. What am I experiencing?
  80. 6U10, 6AC10, 6D10, 6AV11
  81. My debut into the vacuum world: Yarland FV34B
  82. Resistor value tweaks for Radford STA35
  83. do you own a chinese tube integrate? does it.... smell?
  84. Needs help to find transformer
  85. 12AU7 / 12AX7 push-pull
  86. Subwoofer connection?
  87. Ultra-low Noise Valve Regulated PSU. How to?
  88. One channel has less glow
  89. 6l6 tube amp troubleshooring progress
  90. Baldwin organ transformers
  91. has anyone used a chip for an input driver to a 2A3 or the like??
  92. Good PSU for HT upt to 15mA??
  93. Edcor transformers have arrived, but really puzzled!
  94. PCL86 Tube Pre-Amp for guitar. Any Idea?
  95. Single tube, Single ended, 20W, impossible?
  96. Stan's Aikido Build
  97. Power transformer rating
  98. 7w 300b vs 350w Car audio observation (car loses)
  99. Seriously considering doing an OTL - but . .
  100. Emulating remote cut off
  101. Cheap Sakura Hybrid Tube Amp Modification
  102. screen tap on OPT
  103. Understanding Cathode Decoupling
  104. How to test interstage transformers?
  105. DIY Tube Mic
  106. Modified 6C33C
  107. Counterpoint SA-3.1 Rebuild
  108. 6V6 flare at start up
  109. Tube aging, in-circuit test?
  110. HV Regulator board
  111. What kind of top cap for 6V7G?
  112. Changing bass amp output transformer
  113. First timer wood chassis hints
  114. High voltage and heat sinks
  115. GM-70 family with top cap anode?
  116. testing 8417's on mercury 1000
  117. 6N3 Tube Preamp with DC-DC converter
  118. Question About Worn Tubes
  119. help ID 4-500 old stock tubes
  120. 6SN7 SRPP preamp
  121. Reduced Heater voltage to reduce noise
  122. ECL82 monoblock 'spud' and a question
  123. Small Tube/SS hybrid amplifier design 9V
  124. Gibson PA Amp
  125. Plate load impedance
  126. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  127. Good idle current for NOS 7868's
  128. 6N2P - WHAT THE?????????????
  129. Got an old Westinghouse radio today!!!
  130. Distinction between Driver and Output stages
  131. Need a decent chassis punch set
  132. UL P/P KT88 Class A
  133. Problem with 12ax7 phono stage
  134. LA2A parts, T4B spare
  135. Was ist das?
  136. Rset values for IXYS IXTP01N100D
  137. Dutch Book
  138. Tube amplifier chassis damping
  139. How the heck do I solve this problem????
  140. Pentode to Triode Operation
  141. AbouT the PSU II simulator & the "Cockeyed Bridge"
  142. GM70 bias & IT ratio question
  143. Transformer or choke sealed with metal case
  144. Peavy windsor tube head issue
  145. Projector 6V6 Tube Amp rats nest p2p
  146. micro pre amp
  147. Aikido - calculating Rk for new tubes
  148. Steady thumping noise in preamp
  149. Leak Stereo 20 hum and buzz problem
  150. 5V AC maining for filaments
  151. Topology for Schade
  152. Thorsten 6SN7 Line stage.
  153. 12v B+ Tube buffer 12AX7
  154. 300B preamp - best operating point
  155. home made tube amp with 12v b+ how to build one?
  156. Engineer's Amp
  157. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  158. FFT for adjusting tubes
  159. Music to soothe the savage tubes.
  160. Voltage divider instead of expensive volume pot or stepped attenuator.
  161. Question about Hickok 539C
  162. Long-tail pair phase splitter
  163. LM317 calculator for filament circuit
  164. Self-Biased Cathode Follower Output Point
  165. filaments power supply
  166. Power tube buffer
  167. Latching Switch Assemblies
  168. Easy Way To Reduce 251V to 235V?
  169. EL84 Push Pull 25-30 watts
  170. Exploded view of valves
  171. Infineon BSP135 depletion mode mosfet
  172. Show us you COMPACT tube amps !
  173. HV Regulator
  174. Help with my new system
  175. Anything similar to the RNT900 regulator?
  176. The 3W Hammond 125ASE output transformer
  177. Carbon Comp vs Metal Film
  178. Different brand valves
  179. Buzz In Guitar Amp
  180. quad el84 or PP el34
  181. Inexpensive wire source
  182. to MC30 or not to MC30
  183. unbypassed cathode resistor
  184. Supro Golden Holiday Schematic Needed
  185. Does this transformer work?
  186. Max grid resistance for GM70?
  187. Stacked power supply HELP!
  188. Parallel pwr supply chokes for add'l current?
  189. Need help to verify Amperex 7119's genuineness
  190. Need help/advice on a problem with console amplifier
  191. Getting started with my VERY FIRST project
  192. PCL Vintage Amp VA1956 - transformer issue
  193. Help to Identify
  194. 300B based preamp....looking for schematic
  195. USB Oscilloscope
  196. RH84SE, use as headphone amp ?
  197. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  198. Power triode bias by tube rectifier
  199. Two questions on IR volume control
  200. 25 watt output tube
  201. DC heating my 300b
  202. RNT-900 regulator
  203. KT61 Equivalent - Ping Waveborne
  204. EICO 666 meter needle moves too fast/pegs too hard...help?
  205. Eico 666 meter movement speed help
  206. Running a tube without heaters
  207. SE-BAL-SE Switching
  208. What makes is stereo?
  209. Triple Checking Calcs: metering bias with mA meter
  210. EL84 & 12AX7 Amp possibilities
  211. Weird issue with tube driver.
  212. 6E5P
  213. 6B4G / 6S4S Biasing Question
  214. Quick tube wear question
  215. Looking for a tube amp
  216. Internal placing of components
  217. Preamplifiers v power amplifiers
  218. LP2 dht driver
  219. hammond 1650
  220. reverb
  221. Load For PSU
  222. *PING* Tubechimp
  223. Revamping of a Michaelson & Austin TVA-1
  224. 6V6 Behavior W/Fixed Bias (SE Amp)
  225. Low noise, low microphony, low hum valves
  226. 6L6 / 12AX7 push-pull
  227. bowei amp for audionote ax-2 speakers?
  228. Yet another Priboi thread...
  229. Help Old Radio Philips
  230. Distortion discussion from mosqueto Hybrid thread
  231. Sovtek 6N1P Microphonics
  232. ECC86 / 6GM8 Radio Receiver Help
  233. Los Angeles
  234. Op point for 6au6/6gu5 in P-G feedback 6550
  235. Tube Pre-Amp Schematic Needed
  236. find a YAQIN 5881a amplifier
  237. 11N90C in the SBCCS circuit
  238. Help replacing a PSU choke - How to choose choke
  239. does this look like a joke to you?
  240. Electronic Choke for Valve Amplifiers
  241. Sockets for a WE429A
  242. To bypass or not to bypass...
  243. DIY Curve Tracer
  244. 300B filament winding center tapped?
  245. help me decide,headphone amp - parafeed or normal tx ?
  246. 7060 vs 6AN8A
  247. Psu
  248. Blackheart amp moding question
  249. EDCOR Output transformer for 300B
  250. 80 or RGN1064 Scenario

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