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  1. been laying low - revisiting a KT88 partial FB amp
  2. SET Rebuild (Fixed Bias and Rod Coleman DHT Regulators)
  3. ATTN Sy: Why gold grids 2
  4. "el escorpion" line stage, plus 10W B+ flyback supply & mute circuit
  5. Cathode Follower config for Tube DI
  6. Replacing capacitors in a VTL300 power amp
  7. how do I connect a plate amp for subwoofer to tube amp
  8. 6sn7 why the soft clipping.
  9. Yes we need Tone Controls! An outstanding project from 1962
  10. counterpoint sa4 otl
  11. Eico ST40 Kit
  12. Audio output transformer
  13. Thoughts on this schematic actually working.
  14. PSUD2 on Mac
  15. Two-section 500V electrolytic caps for cheap (new production)
  16. I am completely new to tubes.
  17. 2C50 Preamp Schematic
  18. Yet another RH84
  19. Example of Anode Follower (plate follower) with volume ctrl?
  20. Beginner DIY Amp
  21. EF86 Grid/anode triode question.
  22. Tube power supply
  23. Citation II... can't get enough bias!
  24. Auto Radio Tubes
  25. 4 edition valve amplifiers (in London)
  26. Need Help With Screen Switch
  27. Output transformer help
  28. When to use artificial center tap
  29. High end car project- looking for advice
  30. I hate wiring amps!
  31. Silicone tube rings
  32. Quad Audio Digital Potentiometer for Tube Preamp
  33. Looking for grounded grid preamp schematic that use only 12ax7/420a
  34. Someone, please check my plot.
  35. Selecting output transformer for OTL headphone amp
  36. RCA tube preamplifier help
  37. Flickering knocking sound on a push pull EL34 configuration.
  38. Tubes headphone amplifier
  39. Custom tube amplifier builders
  40. New to valve cheap pre-amp tweak help please?
  41. ARC SP-3A-1 Tube Opinions
  42. Has anyone tried a "12AU7 to 6SN7 Adapter"?
  43. 300b filament on pb accumulator
  44. 2K2M Tubes...any use?
  45. GK-71 SE or PP?
  46. Electrolytic capacitors high quality
  47. 6HV5 / CCS - driver project
  48. Getting 60W from 6C33C pushpull
  49. Phono Pre - Chassis layout
  50. Heyco strain relief pliers
  51. RH84 and Electron stream question.
  52. 845 amp.. Now I've got a faint hum..
  53. "Lisa trafo" transformer builder
  54. KT-90 odd behavior
  55. ecc99-2a3
  56. 6SJ7 gain setup
  57. Prototype for 2X 20 Triode
  58. 6n1p preamp schematic
  59. PSU Choke - Valve Phono Pre project
  60. LND150 gyrator for ECC83/12AX7 ???
  61. GU-48 Tube amplifier 833A
  62. OTL with custom 64ohm speakers... Idea in the making
  63. Snap, Crackle, Pop!
  64. What normally causes buzzing?
  65. 690R:8R output transformer
  66. Redplate and Other Questions
  67. Tube wisdom...
  68. 01B thoriated tungsten filaments?
  69. Distortion/Low Signal/Noise from Ampex 620 after being on for 5 minutes?
  70. Max Plate (Boost + DC Supply), what does it mean
  71. It's been a while since I've been here...
  72. Quicksilver Silver Mono Mods
  73. Chinese, Single-Ended, Class A, Questions.
  74. Balanced Aikido Hum
  75. Pentode Tone Control Module
  76. Reason for no output reading and blown tube
  77. Volume control for 24v Aikido pre
  78. First Tube Project
  79. Pentode or triode mode EL84 design suggestions
  80. Question about the need for OPTs for headphone amps
  81. Help with ne-2 lamp in my tube tester!!
  82. Looking for a SRPP Calculator
  83. Snubber at primary SE
  84. JJ ECC802 grid current
  85. Tube Regulator Current Limiting Resistor?
  86. What tube
  87. 6AH4 Preamp Help
  88. B&K 650 signal voltage cal
  89. Testing on latest PP 300B build
  90. Book - Audiophile Vacuum Tube Amplifiers -
  91. Fusion Postmodernism and push tube amps 6SN7 + 26 45
  92. 6GE5 Triode
  93. Any plans to build a 100W per channel power amp?
  94. voltage drops HELP
  95. 2in1 headphone amp
  96. DIY Tube Amp with phono
  97. active loading and point to point
  98. Which tubes are having biggest influence on sound (not power)?
  99. Using epoxy to add mechanical strength to solder joints
  100. Output Transformers in series
  101. Trying to ID maker of O/P Transformers from 'Fuji-Star' tuner
  102. Dynaco Gear or Marketing?
  103. Help me ID these tubes
  104. BOC amp BP-40-k schematic
  105. Bias Schematic
  106. Filtering of DC volts?
  107. Motorola Stereophonic
  108. Helping a newbie break the code...
  109. Additional help.
  110. Help with tube ID.
  111. First build! Heater supply question
  112. Reasonable derating for a power transformer ?
  113. Information wanted on an old amp
  114. Quick question about heater voltage
  115. ECC83 Phase Splitter Voltages
  116. Bias Probe Question
  117. Vintage parts to new amp
  118. Converting all unbalanced connections to balanced
  119. ACF-2 Build
  120. Frequency dependent power rating; OPT se
  121. 6L6 SE AMP
  122. Need to know some kind of found tubes
  123. Sansui 1000a opt max current question
  124. 12U7 - any users out there?
  125. 6GW8 Tube Test Data Needed
  126. 832A headphone amplifier
  127. Help with el84 valves
  128. Tube Preamp philips Mullard
  129. ecc99 2a3
  130. Chinese amp Oscillation
  131. tube regulators
  132. Storing spare tubes
  133. Best way to re-apply text to vintage amp chassis?
  134. B&K 747 troubleshooting
  135. Technical questions: understanding "El Cheapo Grande"
  136. Another Approach to Totem Pole OTL Amplifier
  137. Dynaco ST-70 vs.... ????
  138. Tube rectifiers also need snubber capacitors?
  139. HV regulator design - opinions?
  140. 4E27 / 8001 transmitting tube
  141. testing WE 420A / 5755
  142. String LEDs on long tail pair?
  143. SMPS Tube kit - Interested?
  144. tung-sol 7236
  145. PT Failed Winding
  146. ID for an AMprex something...
  147. Help with floating AC heaters (please)
  148. parallel secondaries, both with center taps
  149. Eico ST 40
  150. Opt primary impedance for audionote M10 phono pre
  151. Sansui AU-70 hum in one channel
  152. Pye HF25 Monoblocks
  153. Magnavox 6V6 circuit and output transformers.
  154. 13.8 volt smps for a kt120 SE amp???
  155. EL84 custom monoblocks
  156. Little Bear pre amp valuable find...
  157. ECL8? Is this the proper name of this tube?
  158. EL 502 / EL 511
  159. Used too weak diode, fuse blew.
  160. My first ever vacuum tube amplifier :)
  161. ATS25N -- Any use for audio ??
  162. Maggie 9300 Amp Problem
  163. Musicmaster 6AQ5A socket
  164. 6922 or 12AX7
  165. nobsound amp
  166. New project: pre and power mono, what to build?
  167. Radford bias: options for ultralinear output
  168. Class D Amplifier -- building blocks
  169. HT windings with no CT
  170. Dynaco st 70 resistor
  171. Older Conrad Johnson or new something else
  172. Power supply dummy load
  173. Micro-power, micro cost amp with Rod-Tubes, 1P24B-V
  174. A bit of fun with archaic converters
  175. DOUK 5670+6AQ5+6E2 push-pull merge Class AB tube amp HIFI amplifier DIY KIT
  176. Counterpoint SA-5.1 with dead channel
  177. need safety advise - speaker output ternimals
  178. Marantz 8B Replica Build
  179. Why Gold Grids
  180. "Shiny Eyes" PSE 300B
  181. PCB layout for Valves
  182. rogers cadet mkiii
  183. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  184. My GM70 amp...separating the input+driver from the output stage
  185. My Quad II and 22 restoration
  186. Help with an OTL CV3618 amp design
  187. stancore NOS power transformer Picture
  188. Choosing a tube amplifier to build, HELP needed
  189. FB circuit for a Maggie 175 with Edcor UL OT's
  190. Gary Lays it on the Line (Classic Output XFMRs)
  191. Info needed on adding subwoofer to tune amp
  192. Help me understand this 7189A SE tube amp?
  193. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  194. Tube amp project for 4 ohm speakers
  195. Wouldn't equal plate V + screen V = triode mode?
  196. 866A, 3B25 LTSPICE models
  197. 6HB6 as finals
  198. Leak OP Transformer Mod - Assistance please
  199. strange noise from tube line amp
  200. 6a6 tube as power output in headphone amp
  201. Mullard 6-7 stereo valve amp rebuild
  202. tube regulator for B+
  203. Yet another HV regulator
  204. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  205. Odd stabilized HV power EF86 + EL84
  206. NL710, 6011
  207. Somebody can identify this tube?
  208. Bullet proof driver circuit
  209. Need Grounding Advice for my System
  210. Use the chassis as the heatsink - Need safety advise
  211. Kofi's Tetra Sans
  212. Spice Simulation of NFB Amp with embedded PF
  213. Simplicity or complexity?
  214. 6N16B Aikido
  215. How to test a power supply
  216. Buying tubes in Bulgaria
  217. Input Trafo MFG reviews needed
  218. A cautinary tale.
  219. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  220. ecc99-2a3:opinion
  221. AutoCAD tube/valve blocks
  222. Step By Step Journal Of My TubeLab SSE build
  223. Triode troubles
  224. Safe PSU capacitor values for old Dyna amp?
  225. KT88, 6550 SE Triode Strapped Performance.
  226. Dynaco A431 OPTs
  227. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  228. SST-70 w/KT-150's mono's build
  229. Error Correction?
  230. Tube amp issue
  231. 4x6N3 preamp board from ebay
  232. time delayed LED for heater
  233. Aikido PSU decisions
  234. coupling caps for RCA rebuild
  235. Recommended coax
  236. Adding solid state bass to valves
  237. Incompatibility between Aikido Pre and Tubelab SimpleSE
  238. What power amp design would suit Esoteric MG-20?
  239. PL36 (triode) SE
  240. Any thoughts on this?
  241. BAT VK 55 paralleled
  242. Looking for a good phono preamp schematic.
  243. Nice diy from Poland
  244. Unballancer humming in one channel
  245. 6S19P tubes instead of 7233 tubes.?
  246. Looking for good stereo amp <$350 - help
  247. Question on EL84 SE triode with CCS at cathode
  248. Convert choke loaded 12b4 to CCS and retain od3's
  249. What can I make with these?
  250. 12AT7 LTP Calling Eli Duttman

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