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  1. Build diary - Ciuffoli all triode OTL
  2. porta fi modification help please
  3. Help me ID 6SN7 GTB Baldwin
  4. Some help with output transformers induced hum
  5. Improved Mullard circuit
  6. Output Transformer Saturation, Impedance Load Curve...
  7. HK Citation II - strange issues
  8. Combination of PCB and point to point wiring a bad idea?
  9. Sound Valves M60 red plated badly please help?
  10. Old tube Radio Conversion
  11. I need something that will take place of a 5965
  12. Mu Follower Analysis
  13. Looking for advice on selling an expensive tube (WE 274A)
  14. 6EM7 SET Amplifier
  15. El84-6BQ5... NOT!!!! just a lookalike!
  16. How to modify the Little Bear P8 preamp to become an amp?
  17. Differential Shunt Cascode Driver
  18. Where do I put the resistor?
  19. been laying low - revisiting a KT88 partial FB amp
  20. SET Rebuild (Fixed Bias and Rod Coleman DHT Regulators)
  21. ATTN Sy: Why gold grids 2
  22. "el escorpion" line stage, plus 10W B+ flyback supply & mute circuit
  23. Cathode Follower config for Tube DI
  24. Replacing capacitors in a VTL300 power amp
  25. how do I connect a plate amp for subwoofer to tube amp
  26. 6sn7 why the soft clipping.
  27. Yes we need Tone Controls! An outstanding project from 1962
  28. counterpoint sa4 otl
  29. Eico ST40 Kit
  30. Audio output transformer
  31. Thoughts on this schematic actually working.
  32. PSUD2 on Mac
  33. I am completely new to tubes.
  34. 2C50 Preamp Schematic
  35. Yet another RH84
  36. Example of Anode Follower (plate follower) with volume ctrl?
  37. Beginner DIY Amp
  38. EF86 Grid/anode triode question.
  39. Citation II... can't get enough bias!
  40. Auto Radio Tubes
  41. 4 edition valve amplifiers (in London)
  42. Need Help With Screen Switch
  43. Output transformer help
  44. High end car project- looking for advice
  45. I hate wiring amps!
  46. Silicone tube rings
  47. Quad Audio Digital Potentiometer for Tube Preamp
  48. Looking for grounded grid preamp schematic that use only 12ax7/420a
  49. Someone, please check my plot.
  50. Selecting output transformer for OTL headphone amp
  51. RCA tube preamplifier help
  52. Flickering knocking sound on a push pull EL34 configuration.
  53. Tubes headphone amplifier
  54. Custom tube amplifier builders
  55. New to valve cheap pre-amp tweak help please?
  56. ARC SP-3A-1 Tube Opinions
  57. Has anyone tried a "12AU7 to 6SN7 Adapter"?
  58. 300b filament on pb accumulator
  59. 2K2M Tubes...any use?
  60. GK-71 SE or PP?
  61. 6HV5 / CCS - driver project
  62. Getting 60W from 6C33C pushpull
  63. Phono Pre - Chassis layout
  64. Heyco strain relief pliers
  65. RH84 and Electron stream question.
  66. 845 amp.. Now I've got a faint hum..
  67. "Lisa trafo" transformer builder
  68. KT-90 odd behavior
  69. ecc99-2a3
  70. 6SJ7 gain setup
  71. Prototype for 2X 20 Triode
  72. 6n1p preamp schematic
  73. PSU Choke - Valve Phono Pre project
  74. LND150 gyrator for ECC83/12AX7 ???
  75. GU-48 Tube amplifier 833A
  76. OTL with custom 64ohm speakers... Idea in the making
  77. Snap, Crackle, Pop!
  78. What normally causes buzzing?
  79. 690R:8R output transformer
  80. Redplate and Other Questions
  81. Tube wisdom...
  82. 01B thoriated tungsten filaments?
  83. Distortion/Low Signal/Noise from Ampex 620 after being on for 5 minutes?
  84. Max Plate (Boost + DC Supply), what does it mean
  85. It's been a while since I've been here...
  86. Quicksilver Silver Mono Mods
  87. Chinese, Single-Ended, Class A, Questions.
  88. Balanced Aikido Hum
  89. Pentode Tone Control Module
  90. Reason for no output reading and blown tube
  91. Volume control for 24v Aikido pre
  92. First Tube Project
  93. Pentode or triode mode EL84 design suggestions
  94. Question about the need for OPTs for headphone amps
  95. Help with ne-2 lamp in my tube tester!!
  96. Looking for a SRPP Calculator
  97. Snubber at primary SE
  98. JJ ECC802 grid current
  99. Tube Regulator Current Limiting Resistor?
  100. What tube
  101. 6AH4 Preamp Help
  102. B&K 650 signal voltage cal
  103. Testing on latest PP 300B build
  104. Book - Audiophile Vacuum Tube Amplifiers -
  105. Fusion Postmodernism and push tube amps 6SN7 + 26 45
  106. 6GE5 Triode
  107. Any plans to build a 100W per channel power amp?
  108. voltage drops HELP
  109. 2in1 headphone amp
  110. DIY Tube Amp with phono
  111. active loading and point to point
  112. Which tubes are having biggest influence on sound (not power)?
  113. Using epoxy to add mechanical strength to solder joints
  114. Output Transformers in series
  115. Trying to ID maker of O/P Transformers from 'Fuji-Star' tuner
  116. Dynaco Gear or Marketing?
  117. Help me ID these tubes
  118. BOC amp BP-40-k schematic
  119. Bias Schematic
  120. Filtering of DC volts?
  121. Motorola Stereophonic
  122. Helping a newbie break the code...
  123. Additional help.
  124. Help with tube ID.
  125. First build! Heater supply question
  126. Reasonable derating for a power transformer ?
  127. Information wanted on an old amp
  128. Quick question about heater voltage
  129. ECC83 Phase Splitter Voltages
  130. Bias Probe Question
  131. Vintage parts to new amp
  132. Converting all unbalanced connections to balanced
  133. ACF-2 Build
  134. Frequency dependent power rating; OPT se
  135. 6L6 SE AMP
  136. Need to know some kind of found tubes
  137. Sansui 1000a opt max current question
  138. 12U7 - any users out there?
  139. 6GW8 Tube Test Data Needed
  140. 832A headphone amplifier
  141. Help with el84 valves
  142. Tube Preamp philips Mullard
  143. ecc99 2a3
  144. Chinese amp Oscillation
  145. tube regulators
  146. Storing spare tubes
  147. Best way to re-apply text to vintage amp chassis?
  148. B&K 747 troubleshooting
  149. Technical questions: understanding "El Cheapo Grande"
  150. Another Approach to Totem Pole OTL Amplifier
  151. Dynaco ST-70 vs.... ????
  152. Tube rectifiers also need snubber capacitors?
  153. HV regulator design - opinions?
  154. 4E27 / 8001 transmitting tube
  155. testing WE 420A / 5755
  156. String LEDs on long tail pair?
  157. SMPS Tube kit - Interested?
  158. tung-sol 7236
  159. PT Failed Winding
  160. ID for an AMprex something...
  161. Help with floating AC heaters (please)
  162. parallel secondaries, both with center taps
  163. Eico ST 40
  164. Opt primary impedance for audionote M10 phono pre
  165. Sansui AU-70 hum in one channel
  166. Pye HF25 Monoblocks
  167. Magnavox 6V6 circuit and output transformers.
  168. 13.8 volt smps for a kt120 SE amp???
  169. EL84 custom monoblocks
  170. Little Bear pre amp valuable find...
  171. ECL8? Is this the proper name of this tube?
  172. EL 502 / EL 511
  173. Used too weak diode, fuse blew.
  174. My first ever vacuum tube amplifier :)
  175. ATS25N -- Any use for audio ??
  176. Maggie 9300 Amp Problem
  177. Musicmaster 6AQ5A socket
  178. 6922 or 12AX7
  179. nobsound amp
  180. New project: pre and power mono, what to build?
  181. Radford bias: options for ultralinear output
  182. Class D Amplifier -- building blocks
  183. HT windings with no CT
  184. Dynaco st 70 resistor
  185. Older Conrad Johnson or new something else
  186. Power supply dummy load
  187. Micro-power, micro cost amp with Rod-Tubes, 1P24B-V
  188. A bit of fun with archaic converters
  189. DOUK 5670+6AQ5+6E2 push-pull merge Class AB tube amp HIFI amplifier DIY KIT
  190. Counterpoint SA-5.1 with dead channel
  191. need safety advise - speaker output ternimals
  192. Marantz 8B Replica Build
  193. Why Gold Grids
  194. "Shiny Eyes" PSE 300B
  195. PCB layout for Valves
  196. rogers cadet mkiii
  197. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  198. My GM70 amp...separating the input+driver from the output stage
  199. My Quad II and 22 restoration
  200. Help with an OTL CV3618 amp design
  201. stancore NOS power transformer Picture
  202. Choosing a tube amplifier to build, HELP needed
  203. FB circuit for a Maggie 175 with Edcor UL OT's
  204. Gary Lays it on the Line (Classic Output XFMRs)
  205. Info needed on adding subwoofer to tune amp
  206. Help me understand this 7189A SE tube amp?
  207. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  208. Tube amp project for 4 ohm speakers
  209. Wouldn't equal plate V + screen V = triode mode?
  210. 866A, 3B25 LTSPICE models
  211. 6HB6 as finals
  212. Leak OP Transformer Mod - Assistance please
  213. strange noise from tube line amp
  214. 6a6 tube as power output in headphone amp
  215. Mullard 6-7 stereo valve amp rebuild
  216. tube regulator for B+
  217. Yet another HV regulator
  218. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  219. Odd stabilized HV power EF86 + EL84
  220. NL710, 6011
  221. Somebody can identify this tube?
  222. Bullet proof driver circuit
  223. Need Grounding Advice for my System
  224. Use the chassis as the heatsink - Need safety advise
  225. Kofi's Tetra Sans
  226. Spice Simulation of NFB Amp with embedded PF
  227. Simplicity or complexity?
  228. 6N16B Aikido
  229. How to test a power supply
  230. Buying tubes in Bulgaria
  231. Input Trafo MFG reviews needed
  232. A cautinary tale.
  233. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  234. ecc99-2a3:opinion
  235. AutoCAD tube/valve blocks
  236. Step By Step Journal Of My TubeLab SSE build
  237. Triode troubles
  238. Safe PSU capacitor values for old Dyna amp?
  239. KT88, 6550 SE Triode Strapped Performance.
  240. Dynaco A431 OPTs
  241. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  242. SST-70 w/KT-150's mono's build
  243. Error Correction?
  244. Tube amp issue
  245. 4x6N3 preamp board from ebay
  246. time delayed LED for heater
  247. Aikido PSU decisions
  248. coupling caps for RCA rebuild
  249. Recommended coax
  250. Adding solid state bass to valves

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