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  1. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  2. 4 x EL84 in UL PP, 470 B+!! is this right
  3. What amp is this?
  4. PS Setup For Testing
  5. OTL designed by Tim Mellow with 4 6C33C?
  6. Bassman 100 schematic questions
  7. Quick question on this schematic
  8. Variac, how to ?
  9. Tube data sheets - inaccuracy
  10. Benny's new ForeWatt SRPP pre amplifier
  11. OddWatt PP UL amplifier from scratch
  12. OPT Impedance
  13. Rectifier Valves
  14. WE311 amp
  15. Sherwood S8000 transformers
  16. yaqin MS-12B Search for Diagrams
  17. EICO HF-30 - Schematic
  18. 12AU7 Phono Stage
  19. How to install a motor run capcitor
  20. Sanity check on B+ regulator
  21. 6B4G PPP idea
  22. First OTL breadboarded
  23. New amp build
  24. Tube Parametric EQ - Idea looking for clarification
  25. Peavey Valveking 100- static sound during warm-up
  26. My Fender Twin Amp Not Working - get your guesses in
  27. DHT heater supply
  28. MC/MM Phono Pream PCB
  29. Help Identifying Old Westinghouse Tube Amp?
  30. GM70 SE Amplifier
  31. OPT considerations
  32. Help - the pre amp I made is not working!
  33. Aikido tube connections.
  34. EL34 PP output tranny questions
  35. DC heater voltage 6 volts or 12 volts?
  36. Dynaco st70....Can I use 6 ohm speakers?
  37. Aikido vs. Foreplay
  38. I found a valve amp in my garage...
  39. Separate PSU to Amp connection
  40. cheep miniure meters
  41. cary SLA 70
  42. Help!!! My Audioromy FU29 amplifier was fried!
  43. Help!!! My Audioromy FU29 amplifier was fried!
  44. Take a look at my transformers
  45. input transformer for Simple SE Tubelab amp
  46. miniblok 2 distorted sound
  47. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  48. For hk citation II owners\experts.
  49. Dynakit Mark III amplifier
  50. Transformer in reverse current doubt
  51. CELLINI-2 a hybrid
  52. Need help starting
  53. ARC (Audio Research) VT50
  54. mixed mode bias
  55. 2C52 datasheet
  56. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  57. 12v Tube amp
  58. Is this ok
  59. 12ax7 Bass Preamp Power Supply Question.
  60. Help a newbie out with his Sherwood S-800iii
  61. A&R 4008 output transformers
  62. Kulish Circuit
  63. A little digression= read on
  64. Sweep tubes and G3
  65. CCS - Help!
  66. Another odd-ball PA amplifier
  67. 25W with 2xEL86(6CW5)!
  68. Question About High-Fidelity Magazine 195x - 196x
  69. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  70. who have schematic of Phenix OTL G3?
  71. CHAMP8 with ECLL800
  72. Drive requirements.....
  73. KT88 hybrid amplifier
  74. 2300 ohm vs 5000 ohm output trans question
  75. Has anyone used this regulator?
  76. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  77. Current mirror circuits
  78. splitter/driver stage
  79. Would someone explain this amp to me please?
  80. What am I experiencing?
  81. 6U10, 6AC10, 6D10, 6AV11
  82. My debut into the vacuum world: Yarland FV34B
  83. Resistor value tweaks for Radford STA35
  84. do you own a chinese tube integrate? does it.... smell?
  85. Needs help to find transformer
  86. 12AU7 / 12AX7 push-pull
  87. Subwoofer connection?
  88. Ultra-low Noise Valve Regulated PSU. How to?
  89. One channel has less glow
  90. 6l6 tube amp troubleshooring progress
  91. Baldwin organ transformers
  92. has anyone used a chip for an input driver to a 2A3 or the like??
  93. Good PSU for HT upt to 15mA??
  94. Edcor transformers have arrived, but really puzzled!
  95. PCL86 Tube Pre-Amp for guitar. Any Idea?
  96. Single tube, Single ended, 20W, impossible?
  97. Stan's Aikido Build
  98. Power transformer rating
  99. 7w 300b vs 350w Car audio observation (car loses)
  100. Seriously considering doing an OTL - but . .
  101. Emulating remote cut off
  102. Cheap Sakura Hybrid Tube Amp Modification
  103. screen tap on OPT
  104. Understanding Cathode Decoupling
  105. How to test interstage transformers?
  106. DIY Tube Mic
  107. Modified 6C33C
  108. Counterpoint SA-3.1 Rebuild
  109. 6V6 flare at start up
  110. Tube aging, in-circuit test?
  111. HV Regulator board
  112. What kind of top cap for 6V7G?
  113. Changing bass amp output transformer
  114. First timer wood chassis hints
  115. High voltage and heat sinks
  116. GM-70 family with top cap anode?
  117. testing 8417's on mercury 1000
  118. 6N3 Tube Preamp with DC-DC converter
  119. Question About Worn Tubes
  120. help ID 4-500 old stock tubes
  121. 6SN7 SRPP preamp
  122. Reduced Heater voltage to reduce noise
  123. ECL82 monoblock 'spud' and a question
  124. Small Tube/SS hybrid amplifier design 9V
  125. Gibson PA Amp
  126. Plate load impedance
  127. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  128. Good idle current for NOS 7868's
  129. 6N2P - WHAT THE?????????????
  130. Got an old Westinghouse radio today!!!
  131. Distinction between Driver and Output stages
  132. Need a decent chassis punch set
  133. UL P/P KT88 Class A
  134. Problem with 12ax7 phono stage
  135. LA2A parts, T4B spare
  136. Was ist das?
  137. Rset values for IXYS IXTP01N100D
  138. Dutch Book
  139. Tube amplifier chassis damping
  140. How the heck do I solve this problem????
  141. Pentode to Triode Operation
  142. AbouT the PSU II simulator & the "Cockeyed Bridge"
  143. GM70 bias & IT ratio question
  144. Transformer or choke sealed with metal case
  145. Peavy windsor tube head issue
  146. Projector 6V6 Tube Amp rats nest p2p
  147. micro pre amp
  148. Aikido - calculating Rk for new tubes
  149. Steady thumping noise in preamp
  150. Leak Stereo 20 hum and buzz problem
  151. 5V AC maining for filaments
  152. Topology for Schade
  153. Thorsten 6SN7 Line stage.
  154. 12v B+ Tube buffer 12AX7
  155. 300B preamp - best operating point
  156. home made tube amp with 12v b+ how to build one?
  157. Engineer's Amp
  158. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  159. FFT for adjusting tubes
  160. Music to soothe the savage tubes.
  161. Voltage divider instead of expensive volume pot or stepped attenuator.
  162. Question about Hickok 539C
  163. Long-tail pair phase splitter
  164. LM317 calculator for filament circuit
  165. Self-Biased Cathode Follower Output Point
  166. filaments power supply
  167. Power tube buffer
  168. Latching Switch Assemblies
  169. Easy Way To Reduce 251V to 235V?
  170. EL84 Push Pull 25-30 watts
  171. Exploded view of valves
  172. Infineon BSP135 depletion mode mosfet
  173. Show us you COMPACT tube amps !
  174. HV Regulator
  175. Help with my new system
  176. Anything similar to the RNT900 regulator?
  177. The 3W Hammond 125ASE output transformer
  178. Carbon Comp vs Metal Film
  179. Different brand valves
  180. Buzz In Guitar Amp
  181. quad el84 or PP el34
  182. Inexpensive wire source
  183. to MC30 or not to MC30
  184. unbypassed cathode resistor
  185. Supro Golden Holiday Schematic Needed
  186. Does this transformer work?
  187. Max grid resistance for GM70?
  188. Stacked power supply HELP!
  189. Parallel pwr supply chokes for add'l current?
  190. Need help to verify Amperex 7119's genuineness
  191. Need help/advice on a problem with console amplifier
  192. Getting started with my VERY FIRST project
  193. PCL Vintage Amp VA1956 - transformer issue
  194. Help to Identify
  195. 300B based preamp....looking for schematic
  196. USB Oscilloscope
  197. RH84SE, use as headphone amp ?
  198. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  199. Power triode bias by tube rectifier
  200. Two questions on IR volume control
  201. 25 watt output tube
  202. DC heating my 300b
  203. RNT-900 regulator
  204. KT61 Equivalent - Ping Waveborne
  205. EICO 666 meter needle moves too fast/pegs too hard...help?
  206. Eico 666 meter movement speed help
  207. Running a tube without heaters
  208. SE-BAL-SE Switching
  209. What makes is stereo?
  210. Triple Checking Calcs: metering bias with mA meter
  211. EL84 & 12AX7 Amp possibilities
  212. Weird issue with tube driver.
  213. 6E5P
  214. 6B4G / 6S4S Biasing Question
  215. Quick tube wear question
  216. Looking for a tube amp
  217. Internal placing of components
  218. Preamplifiers v power amplifiers
  219. LP2 dht driver
  220. hammond 1650
  221. reverb
  222. Load For PSU
  223. *PING* Tubechimp
  224. Revamping of a Michaelson & Austin TVA-1
  225. 6V6 Behavior W/Fixed Bias (SE Amp)
  226. Low noise, low microphony, low hum valves
  227. 6L6 / 12AX7 push-pull
  228. bowei amp for audionote ax-2 speakers?
  229. Yet another Priboi thread...
  230. Help Old Radio Philips
  231. Distortion discussion from mosqueto Hybrid thread
  232. Sovtek 6N1P Microphonics
  233. ECC86 / 6GM8 Radio Receiver Help
  234. Los Angeles
  235. Op point for 6au6/6gu5 in P-G feedback 6550
  236. Tube Pre-Amp Schematic Needed
  237. find a YAQIN 5881a amplifier
  238. 11N90C in the SBCCS circuit
  239. Help replacing a PSU choke - How to choose choke
  240. does this look like a joke to you?
  241. Electronic Choke for Valve Amplifiers
  242. Sockets for a WE429A
  243. To bypass or not to bypass...
  244. DIY Curve Tracer
  245. 300B filament winding center tapped?
  246. help me decide,headphone amp - parafeed or normal tx ?
  247. 7060 vs 6AN8A
  248. Psu
  249. Blackheart amp moding question
  250. EDCOR Output transformer for 300B

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