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  1. GM70 SE Amplifier
  2. OPT considerations
  3. Help - the pre amp I made is not working!
  4. Aikido tube connections.
  5. EL34 PP output tranny questions
  6. DC heater voltage 6 volts or 12 volts?
  7. Dynaco st70....Can I use 6 ohm speakers?
  8. Aikido vs. Foreplay
  9. I found a valve amp in my garage...
  10. Separate PSU to Amp connection
  11. cheep miniure meters
  12. cary SLA 70
  13. Help!!! My Audioromy FU29 amplifier was fried!
  14. Help!!! My Audioromy FU29 amplifier was fried!
  15. Take a look at my transformers
  16. input transformer for Simple SE Tubelab amp
  17. miniblok 2 distorted sound
  18. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  19. For hk citation II owners\experts.
  20. Dynakit Mark III amplifier
  21. Transformer in reverse current doubt
  22. CELLINI-2 a hybrid
  23. Need help starting
  24. ARC (Audio Research) VT50
  25. mixed mode bias
  26. 2C52 datasheet
  27. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  28. 12v Tube amp
  29. Is this ok
  30. 12ax7 Bass Preamp Power Supply Question.
  31. Help a newbie out with his Sherwood S-800iii
  32. A&R 4008 output transformers
  33. Kulish Circuit
  34. A little digression= read on
  35. Sweep tubes and G3
  36. CCS - Help!
  37. Another odd-ball PA amplifier
  38. 25W with 2xEL86(6CW5)!
  39. Question About High-Fidelity Magazine 195x - 196x
  40. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  41. who have schematic of Phenix OTL G3?
  42. CHAMP8 with ECLL800
  43. Drive requirements.....
  44. KT88 hybrid amplifier
  45. 2300 ohm vs 5000 ohm output trans question
  46. Has anyone used this regulator?
  47. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  48. Current mirror circuits
  49. splitter/driver stage
  50. Would someone explain this amp to me please?
  51. What am I experiencing?
  52. 6U10, 6AC10, 6D10, 6AV11
  53. My debut into the vacuum world: Yarland FV34B
  54. Resistor value tweaks for Radford STA35
  55. do you own a chinese tube integrate? does it.... smell?
  56. Needs help to find transformer
  57. 12AU7 / 12AX7 push-pull
  58. Subwoofer connection?
  59. Ultra-low Noise Valve Regulated PSU. How to?
  60. One channel has less glow
  61. 6l6 tube amp troubleshooring progress
  62. Baldwin organ transformers
  63. has anyone used a chip for an input driver to a 2A3 or the like??
  64. Good PSU for HT upt to 15mA??
  65. Edcor transformers have arrived, but really puzzled!
  66. PCL86 Tube Pre-Amp for guitar. Any Idea?
  67. Single tube, Single ended, 20W, impossible?
  68. Stan's Aikido Build
  69. Power transformer rating
  70. 7w 300b vs 350w Car audio observation (car loses)
  71. Seriously considering doing an OTL - but . .
  72. Emulating remote cut off
  73. Cheap Sakura Hybrid Tube Amp Modification
  74. screen tap on OPT
  75. Understanding Cathode Decoupling
  76. How to test interstage transformers?
  77. DIY Tube Mic
  78. Modified 6C33C
  79. Counterpoint SA-3.1 Rebuild
  80. 6V6 flare at start up
  81. Tube aging, in-circuit test?
  82. HV Regulator board
  83. What kind of top cap for 6V7G?
  84. Changing bass amp output transformer
  85. First timer wood chassis hints
  86. High voltage and heat sinks
  87. GM-70 family with top cap anode?
  88. testing 8417's on mercury 1000
  89. 6N3 Tube Preamp with DC-DC converter
  90. Question About Worn Tubes
  91. help ID 4-500 old stock tubes
  92. 6SN7 SRPP preamp
  93. Reduced Heater voltage to reduce noise
  94. ECL82 monoblock 'spud' and a question
  95. Small Tube/SS hybrid amplifier design 9V
  96. Gibson PA Amp
  97. Plate load impedance
  98. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  99. Good idle current for NOS 7868's
  100. 6N2P - WHAT THE?????????????
  101. Output transformer for 845, GM70, 813 and FU-13 - cheap and good
  102. Got an old Westinghouse radio today!!!
  103. Distinction between Driver and Output stages
  104. Need a decent chassis punch set
  105. UL P/P KT88 Class A
  106. Problem with 12ax7 phono stage
  107. LA2A parts, T4B spare
  108. Was ist das?
  109. Rset values for IXYS IXTP01N100D
  110. Dutch Book
  111. Tube amplifier chassis damping
  112. How the heck do I solve this problem????
  113. Pentode to Triode Operation
  114. AbouT the PSU II simulator & the "Cockeyed Bridge"
  115. GM70 bias & IT ratio question
  116. Transformer or choke sealed with metal case
  117. Peavy windsor tube head issue
  118. Projector 6V6 Tube Amp rats nest p2p
  119. micro pre amp
  120. Aikido - calculating Rk for new tubes
  121. Steady thumping noise in preamp
  122. Leak Stereo 20 hum and buzz problem
  123. 5V AC maining for filaments
  124. Topology for Schade
  125. Thorsten 6SN7 Line stage.
  126. 12v B+ Tube buffer 12AX7
  127. 300B preamp - best operating point
  128. home made tube amp with 12v b+ how to build one?
  129. Engineer's Amp
  130. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  131. FFT for adjusting tubes
  132. Music to soothe the savage tubes.
  133. Voltage divider instead of expensive volume pot or stepped attenuator.
  134. Question about Hickok 539C
  135. Long-tail pair phase splitter
  136. LM317 calculator for filament circuit
  137. Self-Biased Cathode Follower Output Point
  138. filaments power supply
  139. Power tube buffer
  140. Latching Switch Assemblies
  141. Easy Way To Reduce 251V to 235V?
  142. EL84 Push Pull 25-30 watts
  143. Exploded view of valves
  144. Infineon BSP135 depletion mode mosfet
  145. Show us you COMPACT tube amps !
  146. HV Regulator
  147. Help with my new system
  148. Anything similar to the RNT900 regulator?
  149. The 3W Hammond 125ASE output transformer
  150. Carbon Comp vs Metal Film
  151. Different brand valves
  152. Buzz In Guitar Amp
  153. quad el84 or PP el34
  154. Inexpensive wire source
  155. to MC30 or not to MC30
  156. unbypassed cathode resistor
  157. Supro Golden Holiday Schematic Needed
  158. Does this transformer work?
  159. Max grid resistance for GM70?
  160. Stacked power supply HELP!
  161. Parallel pwr supply chokes for add'l current?
  162. Need help to verify Amperex 7119's genuineness
  163. Need help/advice on a problem with console amplifier
  164. Getting started with my VERY FIRST project
  165. PCL Vintage Amp VA1956 - transformer issue
  166. Help to Identify
  167. 300B based preamp....looking for schematic
  168. USB Oscilloscope
  169. RH84SE, use as headphone amp ?
  170. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  171. Power triode bias by tube rectifier
  172. Two questions on IR volume control
  173. 25 watt output tube
  174. DC heating my 300b
  175. RNT-900 regulator
  176. KT61 Equivalent - Ping Waveborne
  177. EICO 666 meter needle moves too fast/pegs too hard...help?
  178. Eico 666 meter movement speed help
  179. Running a tube without heaters
  180. SE-BAL-SE Switching
  181. What makes is stereo?
  182. Triple Checking Calcs: metering bias with mA meter
  183. EL84 & 12AX7 Amp possibilities
  184. Weird issue with tube driver.
  185. 6E5P
  186. 6B4G / 6S4S Biasing Question
  187. Quick tube wear question
  188. Looking for a tube amp
  189. Internal placing of components
  190. Preamplifiers v power amplifiers
  191. LP2 dht driver
  192. hammond 1650
  193. reverb
  194. Load For PSU
  195. *PING* Tubechimp
  196. Revamping of a Michaelson & Austin TVA-1
  197. 6V6 Behavior W/Fixed Bias (SE Amp)
  198. Low noise, low microphony, low hum valves
  199. 6L6 / 12AX7 push-pull
  200. bowei amp for audionote ax-2 speakers?
  201. Yet another Priboi thread...
  202. Help Old Radio Philips
  203. Distortion discussion from mosqueto Hybrid thread
  204. Sovtek 6N1P Microphonics
  205. ECC86 / 6GM8 Radio Receiver Help
  206. Los Angeles
  207. Op point for 6au6/6gu5 in P-G feedback 6550
  208. Tube Pre-Amp Schematic Needed
  209. find a YAQIN 5881a amplifier
  210. 11N90C in the SBCCS circuit
  211. Help replacing a PSU choke - How to choose choke
  212. does this look like a joke to you?
  213. Electronic Choke for Valve Amplifiers
  214. Sockets for a WE429A
  215. To bypass or not to bypass...
  216. DIY Curve Tracer
  217. 300B filament winding center tapped?
  218. help me decide,headphone amp - parafeed or normal tx ?
  219. 7060 vs 6AN8A
  220. Psu
  221. Blackheart amp moding question
  222. EDCOR Output transformer for 300B
  223. 80 or RGN1064 Scenario
  224. TUBENEWB - Quad KT88 Monoblocks
  225. CCS in Differential phase splitter?
  226. Need schematic for Smart 2x150vt
  227. Antek OPT
  228. 6DQ6 for audio power amp?
  229. Anyone identify this Mullard?
  230. My Mullard 5-20: some photos and a question
  231. Tube can work in low volt~~fix your knowledge
  232. A problem with a tube receiver
  233. Auto Transformer - safety advice
  234. Where I could find tube in San Jose
  235. 6Н30П spice model for MicroCap ?
  236. Transformer input and resonance
  237. GE6111 Preamplifier
  238. Where to buy audio tubes in Europe
  239. Play iPod into 1955 Record Player's Tube Amplifier
  240. To Schade it , or not..
  241. questions on input stage
  242. Planar/Lighthouse triodes for Audio?
  243. The Best coupling cap..THEL??
  244. 211 SET 40W output design and mfg.
  245. Volume Control with Loudness and no Taps
  246. Use for 4k PP (non UL) OPT's?
  247. Heathkit Oscilloscope O-12
  248. Filament Autobias
  249. Shelby NC Ham Fest
  250. 2A3 Spud