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  1. DC heater voltage 6 volts or 12 volts?
  2. Dynaco st70....Can I use 6 ohm speakers?
  3. Aikido vs. Foreplay
  4. I found a valve amp in my garage...
  5. Separate PSU to Amp connection
  6. cheep miniure meters
  7. cary SLA 70
  8. Help!!! My Audioromy FU29 amplifier was fried!
  9. Help!!! My Audioromy FU29 amplifier was fried!
  10. Take a look at my transformers
  11. input transformer for Simple SE Tubelab amp
  12. miniblok 2 distorted sound
  13. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  14. For hk citation II owners\experts.
  15. Dynakit Mark III amplifier
  16. Transformer in reverse current doubt
  17. CELLINI-2 a hybrid
  18. Need help starting
  19. ARC (Audio Research) VT50
  20. mixed mode bias
  21. 2C52 datasheet
  22. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  23. 12v Tube amp
  24. Is this ok
  25. 12ax7 Bass Preamp Power Supply Question.
  26. Help a newbie out with his Sherwood S-800iii
  27. A&R 4008 output transformers
  28. Kulish Circuit
  29. A little digression= read on
  30. Sweep tubes and G3
  31. CCS - Help!
  32. Another odd-ball PA amplifier
  33. Question About High-Fidelity Magazine 195x - 196x
  34. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  35. who have schematic of Phenix OTL G3?
  36. CHAMP8 with ECLL800
  37. Drive requirements.....
  38. KT88 hybrid amplifier
  39. 2300 ohm vs 5000 ohm output trans question
  40. Has anyone used this regulator?
  41. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  42. Current mirror circuits
  43. splitter/driver stage
  44. Would someone explain this amp to me please?
  45. What am I experiencing?
  46. 6U10, 6AC10, 6D10, 6AV11
  47. My debut into the vacuum world: Yarland FV34B
  48. Resistor value tweaks for Radford STA35
  49. do you own a chinese tube integrate? does it.... smell?
  50. Needs help to find transformer
  51. 12AU7 / 12AX7 push-pull
  52. Subwoofer connection?
  53. Ultra-low Noise Valve Regulated PSU. How to?
  54. One channel has less glow
  55. 6l6 tube amp troubleshooring progress
  56. Baldwin organ transformers
  57. has anyone used a chip for an input driver to a 2A3 or the like??
  58. Good PSU for HT upt to 15mA??
  59. Edcor transformers have arrived, but really puzzled!
  60. Single tube, Single ended, 20W, impossible?
  61. Stan's Aikido Build
  62. Power transformer rating
  63. 7w 300b vs 350w Car audio observation (car loses)
  64. Seriously considering doing an OTL - but . .
  65. Emulating remote cut off
  66. Cheap Sakura Hybrid Tube Amp Modification
  67. screen tap on OPT
  68. Understanding Cathode Decoupling
  69. How to test interstage transformers?
  70. DIY Tube Mic
  71. Modified 6C33C
  72. Counterpoint SA-3.1 Rebuild
  73. 6V6 flare at start up
  74. Tube aging, in-circuit test?
  75. HV Regulator board
  76. What kind of top cap for 6V7G?
  77. First timer wood chassis hints
  78. High voltage and heat sinks
  79. GM-70 family with top cap anode?
  80. testing 8417's on mercury 1000
  81. 6N3 Tube Preamp with DC-DC converter
  82. Question About Worn Tubes
  83. help ID 4-500 old stock tubes
  84. 6SN7 SRPP preamp
  85. Reduced Heater voltage to reduce noise
  86. ECL82 monoblock 'spud' and a question
  87. Small Tube/SS hybrid amplifier design 9V
  88. Plate load impedance
  89. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  90. Good idle current for NOS 7868's
  91. 6N2P - WHAT THE?????????????
  92. Got an old Westinghouse radio today!!!
  93. Distinction between Driver and Output stages
  94. Need a decent chassis punch set
  95. UL P/P KT88 Class A
  96. Problem with 12ax7 phono stage
  97. LA2A parts, T4B spare
  98. Was ist das?
  99. Rset values for IXYS IXTP01N100D
  100. Dutch Book
  101. Tube amplifier chassis damping
  102. How the heck do I solve this problem????
  103. Pentode to Triode Operation
  104. AbouT the PSU II simulator & the "Cockeyed Bridge"
  105. GM70 bias & IT ratio question
  106. Transformer or choke sealed with metal case
  107. Projector 6V6 Tube Amp rats nest p2p
  108. micro pre amp
  109. Aikido - calculating Rk for new tubes
  110. Steady thumping noise in preamp
  111. Leak Stereo 20 hum and buzz problem
  112. 5V AC maining for filaments
  113. Topology for Schade
  114. Thorsten 6SN7 Line stage.
  115. 12v B+ Tube buffer 12AX7
  116. 300B preamp - best operating point
  117. home made tube amp with 12v b+ how to build one?
  118. Engineer's Amp
  119. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  120. FFT for adjusting tubes
  121. Music to soothe the savage tubes.
  122. Voltage divider instead of expensive volume pot or stepped attenuator.
  123. Question about Hickok 539C
  124. Long-tail pair phase splitter
  125. LM317 calculator for filament circuit
  126. Self-Biased Cathode Follower Output Point
  127. filaments power supply
  128. Power tube buffer
  129. Latching Switch Assemblies
  130. Easy Way To Reduce 251V to 235V?
  131. EL84 Push Pull 25-30 watts
  132. Exploded view of valves
  133. Infineon BSP135 depletion mode mosfet
  134. Show us you COMPACT tube amps !
  135. HV Regulator
  136. Help with my new system
  137. Anything similar to the RNT900 regulator?
  138. The 3W Hammond 125ASE output transformer
  139. Carbon Comp vs Metal Film
  140. Different brand valves
  141. quad el84 or PP el34
  142. Inexpensive wire source
  143. to MC30 or not to MC30
  144. unbypassed cathode resistor
  145. Does this transformer work?
  146. Max grid resistance for GM70?
  147. Stacked power supply HELP!
  148. Parallel pwr supply chokes for add'l current?
  149. Need help to verify Amperex 7119's genuineness
  150. Need help/advice on a problem with console amplifier
  151. Getting started with my VERY FIRST project
  152. PCL Vintage Amp VA1956 - transformer issue
  153. Help to Identify
  154. 300B based preamp....looking for schematic
  155. USB Oscilloscope
  156. RH84SE, use as headphone amp ?
  157. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  158. Power triode bias by tube rectifier
  159. Two questions on IR volume control
  160. 25 watt output tube
  161. DC heating my 300b
  162. RNT-900 regulator
  163. KT61 Equivalent - Ping Waveborne
  164. EICO 666 meter needle moves too fast/pegs too hard...help?
  165. Eico 666 meter movement speed help
  166. Running a tube without heaters
  167. SE-BAL-SE Switching
  168. What makes is stereo?
  169. Triple Checking Calcs: metering bias with mA meter
  170. EL84 & 12AX7 Amp possibilities
  171. Weird issue with tube driver.
  172. 6E5P
  173. 6B4G / 6S4S Biasing Question
  174. Quick tube wear question
  175. Looking for a tube amp
  176. Internal placing of components
  177. Preamplifiers v power amplifiers
  178. LP2 dht driver
  179. hammond 1650
  180. Load For PSU
  181. *PING* Tubechimp
  182. Revamping of a Michaelson & Austin TVA-1
  183. 6V6 Behavior W/Fixed Bias (SE Amp)
  184. Low noise, low microphony, low hum valves
  185. 6L6 / 12AX7 push-pull
  186. bowei amp for audionote ax-2 speakers?
  187. Yet another Priboi thread...
  188. Help Old Radio Philips
  189. Distortion discussion from mosqueto Hybrid thread
  190. Sovtek 6N1P Microphonics
  191. ECC86 / 6GM8 Radio Receiver Help
  192. Los Angeles
  193. Op point for 6au6/6gu5 in P-G feedback 6550
  194. Tube Pre-Amp Schematic Needed
  195. find a YAQIN 5881a amplifier
  196. 11N90C in the SBCCS circuit
  197. Help replacing a PSU choke - How to choose choke
  198. does this look like a joke to you?
  199. Electronic Choke for Valve Amplifiers
  200. Sockets for a WE429A
  201. To bypass or not to bypass...
  202. DIY Curve Tracer
  203. 300B filament winding center tapped?
  204. help me decide,headphone amp - parafeed or normal tx ?
  205. 7060 vs 6AN8A
  206. Psu
  207. EDCOR Output transformer for 300B
  208. 80 or RGN1064 Scenario
  209. TUBENEWB - Quad KT88 Monoblocks
  210. CCS in Differential phase splitter?
  211. Need schematic for Smart 2x150vt
  212. Antek OPT
  213. 6DQ6 for audio power amp?
  214. Anyone identify this Mullard?
  215. My Mullard 5-20: some photos and a question
  216. Tube can work in low volt~~fix your knowledge
  217. A problem with a tube receiver
  218. Auto Transformer - safety advice
  219. Where I could find tube in San Jose
  220. 6Н30П spice model for MicroCap ?
  221. Transformer input and resonance
  222. GE6111 Preamplifier
  223. Where to buy audio tubes in Europe
  224. Play iPod into 1955 Record Player's Tube Amplifier
  225. To Schade it , or not..
  226. questions on input stage
  227. Planar/Lighthouse triodes for Audio?
  228. The Best coupling cap..THEL??
  229. 211 SET 40W output design and mfg.
  230. Volume Control with Loudness and no Taps
  231. Use for 4k PP (non UL) OPT's?
  232. Heathkit Oscilloscope O-12
  233. Filament Autobias
  234. Shelby NC Ham Fest
  235. 2A3 Spud
  236. Resistor as a load
  237. How to balance pushp pull DHT finals
  238. 240v to 220v
  239. Hammond 272 FX plate voltage
  240. Drawing Load Line for Parallel Output Tube
  241. question about swapping el34 for kt77 in my tube amp
  242. 6 volt recifier tubes
  243. Output transformer sizing...again...
  244. Power supply cabling
  245. Voltage doubler using PSUII?
  246. Rectifier Tubes in SE Amps
  247. 6v6 SEP
  248. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  249. Jumper Wire Gauge and Material for Phono Preamp?
  250. Tube libraries for AutoTRAX wanted.

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