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  1. counterpoint sa4 otl
  2. Eico ST40 Kit
  3. Audio output transformer
  4. Thoughts on this schematic actually working.
  5. PSUD2 on Mac
  6. Two-section 500V electrolytic caps for cheap (new production)
  7. I am completely new to tubes.
  8. 2C50 Preamp Schematic
  9. Yet another RH84
  10. Example of Anode Follower (plate follower) with volume ctrl?
  11. Beginner DIY Amp
  12. EF86 Grid/anode triode question.
  13. Tube power supply
  14. Citation II... can't get enough bias!
  15. Auto Radio Tubes
  16. 4 edition valve amplifiers (in London)
  17. Need Help With Screen Switch
  18. Output transformer help
  19. High end car project- looking for advice
  20. I hate wiring amps!
  21. Silicone tube rings
  22. Quad Audio Digital Potentiometer for Tube Preamp
  23. Looking for grounded grid preamp schematic that use only 12ax7/420a
  24. Someone, please check my plot.
  25. Selecting output transformer for OTL headphone amp
  26. RCA tube preamplifier help
  27. Flickering knocking sound on a push pull EL34 configuration.
  28. Tubes headphone amplifier
  29. Custom tube amplifier builders
  30. New to valve cheap pre-amp tweak help please?
  31. ARC SP-3A-1 Tube Opinions
  32. Has anyone tried a "12AU7 to 6SN7 Adapter"?
  33. 300b filament on pb accumulator
  34. 2K2M Tubes...any use?
  35. GK-71 SE or PP?
  36. Electrolytic capacitors high quality
  37. 6HV5 / CCS - driver project
  38. Getting 60W from 6C33C pushpull
  39. Phono Pre - Chassis layout
  40. Heyco strain relief pliers
  41. RH84 and Electron stream question.
  42. 845 amp.. Now I've got a faint hum..
  43. "Lisa trafo" transformer builder
  44. KT-90 odd behavior
  45. ecc99-2a3
  46. 6SJ7 gain setup
  47. Prototype for 2X 20 Triode
  48. 6n1p preamp schematic
  49. PSU Choke - Valve Phono Pre project
  50. LND150 gyrator for ECC83/12AX7 ???
  51. GU-48 Tube amplifier 833A
  52. OTL with custom 64ohm speakers... Idea in the making
  53. Snap, Crackle, Pop!
  54. What normally causes buzzing?
  55. 690R:8R output transformer
  56. Redplate and Other Questions
  57. Tube wisdom...
  58. 01B thoriated tungsten filaments?
  59. Distortion/Low Signal/Noise from Ampex 620 after being on for 5 minutes?
  60. Max Plate (Boost + DC Supply), what does it mean
  61. It's been a while since I've been here...
  62. Quicksilver Silver Mono Mods
  63. Chinese, Single-Ended, Class A, Questions.
  64. Balanced Aikido Hum
  65. Pentode Tone Control Module
  66. Reason for no output reading and blown tube
  67. Volume control for 24v Aikido pre
  68. First Tube Project
  69. Pentode or triode mode EL84 design suggestions
  70. Question about the need for OPTs for headphone amps
  71. Help with ne-2 lamp in my tube tester!!
  72. Looking for a SRPP Calculator
  73. Snubber at primary SE
  74. JJ ECC802 grid current
  75. Tube Regulator Current Limiting Resistor?
  76. What tube
  77. 6AH4 Preamp Help
  78. B&K 650 signal voltage cal
  79. Testing on latest PP 300B build
  80. Book - Audiophile Vacuum Tube Amplifiers -
  81. Fusion Postmodernism and push tube amps 6SN7 + 26 45
  82. 6GE5 Triode
  83. Any plans to build a 100W per channel power amp?
  84. voltage drops HELP
  85. 2in1 headphone amp
  86. DIY Tube Amp with phono
  87. active loading and point to point
  88. Which tubes are having biggest influence on sound (not power)?
  89. Using epoxy to add mechanical strength to solder joints
  90. Output Transformers in series
  91. Trying to ID maker of O/P Transformers from 'Fuji-Star' tuner
  92. Dynaco Gear or Marketing?
  93. Help me ID these tubes
  94. BOC amp BP-40-k schematic
  95. Bias Schematic
  96. Filtering of DC volts?
  97. Motorola Stereophonic
  98. Helping a newbie break the code...
  99. Additional help.
  100. Help with tube ID.
  101. First build! Heater supply question
  102. Reasonable derating for a power transformer ?
  103. Information wanted on an old amp
  104. Quick question about heater voltage
  105. ECC83 Phase Splitter Voltages
  106. Bias Probe Question
  107. Vintage parts to new amp
  108. Converting all unbalanced connections to balanced
  109. ACF-2 Build
  110. Frequency dependent power rating; OPT se
  111. 6L6 SE AMP
  112. Need to know some kind of found tubes
  113. Sansui 1000a opt max current question
  114. 12U7 - any users out there?
  115. 6GW8 Tube Test Data Needed
  116. 832A headphone amplifier
  117. Help with el84 valves
  118. Tube Preamp philips Mullard
  119. ecc99 2a3
  120. Chinese amp Oscillation
  121. tube regulators
  122. Storing spare tubes
  123. Best way to re-apply text to vintage amp chassis?
  124. B&K 747 troubleshooting
  125. Technical questions: understanding "El Cheapo Grande"
  126. Another Approach to Totem Pole OTL Amplifier
  127. Dynaco ST-70 vs.... ????
  128. Tube rectifiers also need snubber capacitors?
  129. HV regulator design - opinions?
  130. 4E27 / 8001 transmitting tube
  131. testing WE 420A / 5755
  132. String LEDs on long tail pair?
  133. SMPS Tube kit - Interested?
  134. tung-sol 7236
  135. PT Failed Winding
  136. ID for an AMprex something...
  137. Help with floating AC heaters (please)
  138. parallel secondaries, both with center taps
  139. Eico ST 40
  140. Opt primary impedance for audionote M10 phono pre
  141. Sansui AU-70 hum in one channel
  142. Pye HF25 Monoblocks
  143. Magnavox 6V6 circuit and output transformers.
  144. 13.8 volt smps for a kt120 SE amp???
  145. EL84 custom monoblocks
  146. Little Bear pre amp valuable find...
  147. ECL8? Is this the proper name of this tube?
  148. EL 502 / EL 511
  149. Used too weak diode, fuse blew.
  150. My first ever vacuum tube amplifier :)
  151. ATS25N -- Any use for audio ??
  152. Maggie 9300 Amp Problem
  153. Musicmaster 6AQ5A socket
  154. 6922 or 12AX7
  155. nobsound amp
  156. New project: pre and power mono, what to build?
  157. Radford bias: options for ultralinear output
  158. Class D Amplifier -- building blocks
  159. HT windings with no CT
  160. Dynaco st 70 resistor
  161. Older Conrad Johnson or new something else
  162. Power supply dummy load
  163. Micro-power, micro cost amp with Rod-Tubes, 1P24B-V
  164. A bit of fun with archaic converters
  165. DOUK 5670+6AQ5+6E2 push-pull merge Class AB tube amp HIFI amplifier DIY KIT
  166. Counterpoint SA-5.1 with dead channel
  167. need safety advise - speaker output ternimals
  168. Marantz 8B Replica Build
  169. Why Gold Grids
  170. "Shiny Eyes" PSE 300B
  171. PCB layout for Valves
  172. rogers cadet mkiii
  173. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  174. My GM70 amp...separating the input+driver from the output stage
  175. My Quad II and 22 restoration
  176. Help with an OTL CV3618 amp design
  177. stancore NOS power transformer Picture
  178. Choosing a tube amplifier to build, HELP needed
  179. FB circuit for a Maggie 175 with Edcor UL OT's
  180. Gary Lays it on the Line (Classic Output XFMRs)
  181. Info needed on adding subwoofer to tune amp
  182. Help me understand this 7189A SE tube amp?
  183. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  184. Tube amp project for 4 ohm speakers
  185. Wouldn't equal plate V + screen V = triode mode?
  186. 866A, 3B25 LTSPICE models
  187. 6HB6 as finals
  188. Leak OP Transformer Mod - Assistance please
  189. strange noise from tube line amp
  190. 6a6 tube as power output in headphone amp
  191. Mullard 6-7 stereo valve amp rebuild
  192. tube regulator for B+
  193. Yet another HV regulator
  194. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  195. Odd stabilized HV power EF86 + EL84
  196. NL710, 6011
  197. Somebody can identify this tube?
  198. Bullet proof driver circuit
  199. Need Grounding Advice for my System
  200. Use the chassis as the heatsink - Need safety advise
  201. Kofi's Tetra Sans
  202. Spice Simulation of NFB Amp with embedded PF
  203. Simplicity or complexity?
  204. 6N16B Aikido
  205. How to test a power supply
  206. Buying tubes in Bulgaria
  207. Input Trafo MFG reviews needed
  208. A cautinary tale.
  209. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  210. ecc99-2a3:opinion
  211. AutoCAD tube/valve blocks
  212. Step By Step Journal Of My TubeLab SSE build
  213. Triode troubles
  214. Safe PSU capacitor values for old Dyna amp?
  215. KT88, 6550 SE Triode Strapped Performance.
  216. Dynaco A431 OPTs
  217. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  218. SST-70 w/KT-150's mono's build
  219. Error Correction?
  220. Tube amp issue
  221. 4x6N3 preamp board from ebay
  222. time delayed LED for heater
  223. Aikido PSU decisions
  224. coupling caps for RCA rebuild
  225. Recommended coax
  226. Adding solid state bass to valves
  227. Incompatibility between Aikido Pre and Tubelab SimpleSE
  228. What power amp design would suit Esoteric MG-20?
  229. PL36 (triode) SE
  230. Any thoughts on this?
  231. BAT VK 55 paralleled
  232. Looking for a good phono preamp schematic.
  233. Nice diy from Poland
  234. Unballancer humming in one channel
  235. 6S19P tubes instead of 7233 tubes.?
  236. Looking for good stereo amp <$350 - help
  237. Question on EL84 SE triode with CCS at cathode
  238. Convert choke loaded 12b4 to CCS and retain od3's
  239. What can I make with these?
  240. 12AT7 LTP Calling Eli Duttman
  241. Book Help, Please?
  242. Amplifier class A EL34
  243. ps audio hybrid tube buffer
  244. FS: Copper chassis, OPT and Power Xfmrs
  245. Negative Feedback Amplifier with embedded Positive Feedback Booster
  246. Looking for a single ended amp.
  247. EF39 as 300B driver...
  248. How is Electro Harmonix 6922 sonicly compared to NOS?
  249. Tube amp driving a Subwoofer
  250. Leak Stereo 20 Power Supply Choke?

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