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  1. Western Electric 300B tubes
  2. Interstage transformer crosswalk help
  3. DC coupled MOSFET drivers for output stage - simple questions
  4. 813 PP Audio Amp Help
  5. TX 2575
  6. HK Citation II Negative Feedback question... how can I measure it?
  7. a little help with the aikido lv?
  8. Is it possible for a tube to not light up without any visual other indicators?
  9. Oversized OPTs
  10. How to calculate global NFB CAPACITOR. Is it needed?
  11. Simple driver for positive grid tubes
  12. Surplus for tubes in NY and Miami
  13. Lux CL-35 tone control simulation issue
  14. Stereo SE in Parallel?
  15. 6AR6: A new tube to play with
  16. Time for another dumb question
  17. CBS 12AU7?
  18. SE UL 6V6 GT
  19. RCA output transformer part # 246860
  20. 801A Battery Bias
  21. Acoustat Servo Amps
  22. how to connect output transformers??
  23. Tube Amp Power transformer getting Hot...dumb question
  24. Where to get tubes for DCPP build?
  25. Pro and Cons to use 4 ohm tap for Global Feedback instead of 8 ohm tap
  26. Any quality Chinese tube amps?
  27. 6V6 Single Ended question
  28. C. Follower w/- active load
  29. Bias adjustment in Stereo Power Amp with 4 x EL34
  30. All Tube MC Phono Head Amp
  31. Marantz 7 Tube pre-amplifier PCB Board Design
  32. Miller capacitance
  33. Regarding pin 1 & pin 8 EL34
  34. Better place for noise to put the Global Feedback resistor
  35. Change 12AY7 to 12AX7 Tube. Waht new settings?
  36. Bogen MO-100: Series and blown power transformer
  37. Tung Sol Reissue 6550 Ratings/ Reliability
  38. How do I calculate shunt resistor value in a heater series string
  39. Mikael Abdellah KT88 tweak
  40. 845 tube biasing strangly
  41. Which phono should I pick?
  42. Combination of Philips en Psvane tubes EL34
  43. 388A datasheet
  44. Build diary - Ciuffoli all triode OTL
  45. porta fi modification help please
  46. Help me ID 6SN7 GTB Baldwin
  47. Some help with output transformers induced hum
  48. Improved Mullard circuit
  49. Output Transformer Saturation, Impedance Load Curve...
  50. HK Citation II - strange issues
  51. Combination of PCB and point to point wiring a bad idea?
  52. Sound Valves M60 red plated badly please help?
  53. Old tube Radio Conversion
  54. I need something that will take place of a 5965
  55. Mu Follower Analysis
  56. Looking for advice on selling an expensive tube (WE 274A)
  57. 6EM7 SET Amplifier
  58. How to modify the Little Bear P8 preamp to become an amp?
  59. Differential Shunt Cascode Driver
  60. Where do I put the resistor?
  61. been laying low - revisiting a KT88 partial FB amp
  62. SET Rebuild (Fixed Bias and Rod Coleman DHT Regulators)
  63. ATTN Sy: Why gold grids 2
  64. "el escorpion" line stage, plus 10W B+ flyback supply & mute circuit
  65. Cathode Follower config for Tube DI
  66. Replacing capacitors in a VTL300 power amp
  67. how do I connect a plate amp for subwoofer to tube amp
  68. 6sn7 why the soft clipping.
  69. Yes we need Tone Controls! An outstanding project from 1962
  70. counterpoint sa4 otl
  71. Eico ST40 Kit
  72. Audio output transformer
  73. Thoughts on this schematic actually working.
  74. I am completely new to tubes.
  75. 2C50 Preamp Schematic
  76. Yet another RH84
  77. Example of Anode Follower (plate follower) with volume ctrl?
  78. Beginner DIY Amp
  79. EF86 Grid/anode triode question.
  80. Citation II... can't get enough bias!
  81. Auto Radio Tubes
  82. 4 edition valve amplifiers (in London)
  83. Need Help With Screen Switch
  84. Output transformer help
  85. High end car project- looking for advice
  86. Silicone tube rings
  87. Looking for grounded grid preamp schematic that use only 12ax7/420a
  88. Someone, please check my plot.
  89. Selecting output transformer for OTL headphone amp
  90. RCA tube preamplifier help
  91. Flickering knocking sound on a push pull EL34 configuration.
  92. Tubes headphone amplifier
  93. Custom tube amplifier builders
  94. New to valve cheap pre-amp tweak help please?
  95. ARC SP-3A-1 Tube Opinions
  96. Has anyone tried a "12AU7 to 6SN7 Adapter"?
  97. 300b filament on pb accumulator
  98. 2K2M Tubes...any use?
  99. GK-71 SE or PP?
  100. 6HV5 / CCS - driver project
  101. Getting 60W from 6C33C pushpull
  102. Phono Pre - Chassis layout
  103. RH84 and Electron stream question.
  104. 845 amp.. Now I've got a faint hum..
  105. "Lisa trafo" transformer builder
  106. KT-90 odd behavior
  107. ecc99-2a3
  108. 6SJ7 gain setup
  109. Prototype for 2X 20 Triode
  110. 6n1p preamp schematic
  111. PSU Choke - Valve Phono Pre project
  112. LND150 gyrator for ECC83/12AX7 ???
  113. GU-48 Tube amplifier 833A
  114. OTL with custom 64ohm speakers... Idea in the making
  115. Snap, Crackle, Pop!
  116. What normally causes buzzing?
  117. 690R:8R output transformer
  118. Redplate and Other Questions
  119. Tube wisdom...
  120. 01B thoriated tungsten filaments?
  121. Distortion/Low Signal/Noise from Ampex 620 after being on for 5 minutes?
  122. Max Plate (Boost + DC Supply), what does it mean
  123. It's been a while since I've been here...
  124. Quicksilver Silver Mono Mods
  125. Chinese, Single-Ended, Class A, Questions.
  126. Balanced Aikido Hum
  127. Pentode Tone Control Module
  128. Reason for no output reading and blown tube
  129. Volume control for 24v Aikido pre
  130. First Tube Project
  131. Pentode or triode mode EL84 design suggestions
  132. Question about the need for OPTs for headphone amps
  133. Looking for a SRPP Calculator
  134. Snubber at primary SE
  135. JJ ECC802 grid current
  136. Tube Regulator Current Limiting Resistor?
  137. What tube
  138. 6AH4 Preamp Help
  139. Testing on latest PP 300B build
  140. Book - Audiophile Vacuum Tube Amplifiers -
  141. Fusion Postmodernism and push tube amps 6SN7 + 26 45
  142. 6GE5 Triode
  143. Any plans to build a 100W per channel power amp?
  144. voltage drops HELP
  145. 2in1 headphone amp
  146. DIY Tube Amp with phono
  147. active loading and point to point
  148. Which tubes are having biggest influence on sound (not power)?
  149. Output Transformers in series
  150. Trying to ID maker of O/P Transformers from 'Fuji-Star' tuner
  151. Dynaco Gear or Marketing?
  152. Help me ID these tubes
  153. BOC amp BP-40-k schematic
  154. Bias Schematic
  155. Filtering of DC volts?
  156. Motorola Stereophonic
  157. Helping a newbie break the code...
  158. Additional help.
  159. Help with tube ID.
  160. First build! Heater supply question
  161. Reasonable derating for a power transformer ?
  162. Information wanted on an old amp
  163. Quick question about heater voltage
  164. ECC83 Phase Splitter Voltages
  165. Bias Probe Question
  166. Vintage parts to new amp
  167. Converting all unbalanced connections to balanced
  168. ACF-2 Build
  169. Frequency dependent power rating; OPT se
  170. 6L6 SE AMP
  171. Need to know some kind of found tubes
  172. Sansui 1000a opt max current question
  173. 12U7 - any users out there?
  174. 6GW8 Tube Test Data Needed
  175. 832A headphone amplifier
  176. Help with el84 valves
  177. Tube Preamp philips Mullard
  178. ecc99 2a3
  179. Chinese amp Oscillation
  180. tube regulators
  181. Storing spare tubes
  182. Best way to re-apply text to vintage amp chassis?
  183. Technical questions: understanding "El Cheapo Grande"
  184. Another Approach to Totem Pole OTL Amplifier
  185. Dynaco ST-70 vs.... ????
  186. Tube rectifiers also need snubber capacitors?
  187. HV regulator design - opinions?
  188. 4E27 / 8001 transmitting tube
  189. testing WE 420A / 5755
  190. String LEDs on long tail pair?
  191. SMPS Tube kit - Interested?
  192. tung-sol 7236
  193. PT Failed Winding
  194. ID for an AMprex something...
  195. Help with floating AC heaters (please)
  196. parallel secondaries, both with center taps
  197. Eico ST 40
  198. Opt primary impedance for audionote M10 phono pre
  199. Sansui AU-70 hum in one channel
  200. Pye HF25 Monoblocks
  201. Magnavox 6V6 circuit and output transformers.
  202. 13.8 volt smps for a kt120 SE amp???
  203. EL84 custom monoblocks
  204. Little Bear pre amp valuable find...
  205. ECL8? Is this the proper name of this tube?
  206. EL 502 / EL 511
  207. Used too weak diode, fuse blew.
  208. My first ever vacuum tube amplifier :)
  209. ATS25N -- Any use for audio ??
  210. Maggie 9300 Amp Problem
  211. Musicmaster 6AQ5A socket
  212. 6922 or 12AX7
  213. nobsound amp
  214. New project: pre and power mono, what to build?
  215. Radford bias: options for ultralinear output
  216. Class D Amplifier -- building blocks
  217. HT windings with no CT
  218. Dynaco st 70 resistor
  219. Older Conrad Johnson or new something else
  220. Power supply dummy load
  221. Micro-power, micro cost amp with Rod-Tubes, 1P24B-V
  222. A bit of fun with archaic converters
  223. DOUK 5670+6AQ5+6E2 push-pull merge Class AB tube amp HIFI amplifier DIY KIT
  224. Counterpoint SA-5.1 with dead channel
  225. need safety advise - speaker output ternimals
  226. Marantz 8B Replica Build
  227. Why Gold Grids
  228. "Shiny Eyes" PSE 300B
  229. PCB layout for Valves
  230. rogers cadet mkiii
  231. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  232. My GM70 amp...separating the input+driver from the output stage
  233. My Quad II and 22 restoration
  234. Help with an OTL CV3618 amp design
  235. stancore NOS power transformer Picture
  236. Choosing a tube amplifier to build, HELP needed
  237. FB circuit for a Maggie 175 with Edcor UL OT's
  238. Gary Lays it on the Line (Classic Output XFMRs)
  239. Info needed on adding subwoofer to tune amp
  240. Help me understand this 7189A SE tube amp?
  241. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  242. Tube amp project for 4 ohm speakers
  243. Wouldn't equal plate V + screen V = triode mode?
  244. 866A, 3B25 LTSPICE models
  245. 6HB6 as finals
  246. Leak OP Transformer Mod - Assistance please
  247. strange noise from tube line amp
  248. 6a6 tube as power output in headphone amp
  249. Mullard 6-7 stereo valve amp rebuild
  250. tube regulator for B+

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