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  1. dynaco pas3
  2. 5U4GB full-wave bridge, stumped
  3. HELP NEEDED for a 6CA4/EZ81 power supply
  4. OT for 2A3 PSE w/Parafeed
  5. More Dynaco Mark VI Questions
  6. curious feedback in circuit of Pioneer SM-Q300 receiver
  7. Hytron 2E25 - Other forgotten and marvelous tube !
  8. need tube upgrade advice please sir
  9. buyer beware
  10. JJ 5y3S pin 1??
  11. My first Sansui AU-111 Rebuild
  12. Capacitor-induced distortion
  13. Elevating Heater Voltage with multiple Transformer Heater Secondaries
  14. Common Cathode as DAC output
  15. Pre-Amp with russian tubes 1j24b
  16. How to calculate, the output impedance of a tube with grounded grid
  17. How To Draw Load Line With Output Transformer ?
  18. Inter electrode capacitance.
  19. My amp is an oscillator !
  20. TESLA PL509
  21. What value for Va ?
  22. Help selecting an input transformer ?
  23. Should same valves grid voltage vary much ?
  24. Driver options for 300B-XLS (4P1L-IS-4P1L-IS)
  25. Restoring a Scott 299-B
  26. Latest project, 80 watt valve amplifier
  27. PP Amp Doubling Output Power
  28. Setting up a Wilson current mirror as a differential load
  29. interested in tube amps
  30. Baldwin 45P amp project
  31. DIYGene's Jadis JP-200 Preamp Kit
  32. Need design/schematic for 6H30P driven 6C33C SET
  33. Substitute 6AQ8 for my 6CG7's
  34. 6bq5 tubes in a Heathkit AA-151
  35. Marantz 8b restoration: colour code, prints, schematics
  36. Show me your screen drive circuits
  37. Potting Compounds
  38. Chokes in the ground "plane"
  39. OTL idea
  40. Balance control tip for newbee's
  41. Ebay win - is this any good?
  42. 6sn7 pse amp for altec lansing 604E
  43. "Cockeyed Bridge" with damper diode?
  44. Mac 2100 Hybrid
  45. Single-Stage Hybrid Cascode Power Amp
  46. New to Tube amps, heathkit question
  47. 6AS7 OTL PL build
  48. On Bootstrapping diodes for UL G2 MOSFET
  49. Chasing Aikido "hum"
  50. valve monobloc designs
  51. 7A5 is a good driver for the 300B ?
  52. Parallel Push Pull 6V6 design
  53. Soundstage
  54. Brains & Brawn CF : where's the catch ?
  55. ISO-TANGO to quit
  56. Shifting reflective loads using secondary taps?
  57. VTL -- 20 6550's a side and their xfmrs
  58. "Diamond" tube preamp with 12au7
  59. Wich factory made this tube ?
  60. Bootstrapped Cathode Coupled Amplifier
  61. OTL 6AS7
  62. Diode performance testing
  63. Monacor SA-10
  64. Volume Control Hum
  65. Stromberg-Carlson AP-50
  66. 5 wire and 3 wire output transformer change ?
  67. Yaqin mc 10L
  68. Can OTL Ciclotron amp use solid state regulated PS?
  69. Cross-channel overtalk with strange effects
  70. Why 6.3V?
  71. KT88 Williamson Design Questions
  72. Winding a center-tap secondary
  73. HV delay switch
  74. McIntosh MC-30...Balanced Input Feasible?
  75. Designing line driver / pre-amp
  76. Bucking and boosting a tube power transformer
  77. 33A-158M
  78. All DHT integrated amp
  79. 6N1P
  80. basic query - Pete Millett 807 board.
  81. Tube Tester with undocumented tubes
  82. "Fritz" the Boston/RI tube guy - ANYONE know what became of him??
  83. EI yugoslavia gone forever.
  84. Quicksilver 8417 Design - Stay with it or modify?
  85. Looking for some advice on odd preamp noise issue
  86. Tubes in an opamp feedback loop ?
  87. Jensen P-P Cathode Follower
  88. Cathode follower rigorous definition.
  89. Little Bear P3 ?!?! opinions ?
  90. NOS GU-81
  91. OPT endbell color!
  92. Music Angel kt88 with unbalanced output.. help me!
  93. Heater Supply Center Tap
  94. SCA-35 Pot noise
  95. Conrad Johnson MV 55
  96. Comments on 6C33C-B ARG OTL
  97. Construction tips for high voltage amps.
  98. 6L6 bias
  99. came across Mingda Tube king mono blocks
  100. a lot of noise
  101. El84 pp Amp problem
  102. Power on filament current surge question
  103. Its likely a repost but W/e
  104. Scored some 8236's....
  105. What causes valve to glow red inside ?
  106. Tubes and radioisotope decay
  107. PSUDII Question
  108. DIY Bias Buddy
  109. Recommend me a high power OPT
  110. Design Shorting Tubes?
  111. Microsoft Tube Amp and Speakers
  112. S5 K-16LS Tone Control - Help Please
  113. SEUL Circuit for PL519, has anyone here built this?
  114. Motorola three channel
  115. Your own builders book
  116. WE91A - high frequency roll off
  117. Dynaco MarkIII dimensions
  118. Leak TL12+ smoothing capacitors.
  119. Question about failing 6550 output
  120. Need help converting Ampex 960 R2R to a preamp...
  121. 5751 SPICE Model -- for Poddwatt II
  122. Configuring an Audio Transformer for 8 Ohmsuring
  123. OTL Blocking cap / RC filter
  124. What do you think..OP Tx
  125. Does anyone have GA399MA.pdf?
  126. New Amp Build, First Post
  127. Twisting HV leads
  128. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  129. Help with AVO MK IV Meter
  130. Why use a pentode?
  131. Filter choke temperature concerns
  132. Is my output transformer damaged?
  133. Parafeed without a cap
  134. Edcor Transformer Problems
  135. From The Daft Idea Department
  136. Do I need a resistor between plates? pic included.
  137. Tube preamp overheating characteristics?
  138. Valve amplifier sounds great
  139. volume pot hum at low and high volume
  140. Thank You
  141. Help Needed ;)
  142. Mullard EL-34: new vs vintage
  143. A new IC for monitoring tubes
  144. 6L6 transformer on EL84
  145. Output transformer design
  146. Tubes4HiFi preamp questions
  147. Newbie advice - Phono Preamp/1st electronics build
  148. Got a HeathKit, now what to do?
  149. 4P1L push pull amp with Lundahl zero global feedback
  150. 12AQ5 SE Amp Issue
  151. ISO a motorboat
  152. Tube characteristic - Originates from pre or power amp tubes?
  153. swapping console amps...
  154. swapping console amps...
  155. Hum issue in PAS Aikido
  156. Hammond Transformer Warranty
  157. 6CB5 in triode PP?
  158. Input capacitance when tube is not conducting
  159. What would you build with these output transformers?
  160. Need help with new tube for my amp
  161. Does the method for loading the plate affect gain of the stage?
  162. Slightly Sick Amplifier
  163. OP Tx for signal tubes in Headphone amps
  164. Listing of Radio Amateur/HAM Flea Markets In Europe
  165. need mac kit 30 transformer
  166. Is this transformer saturation? (pictures inside)
  167. Did I use the LR8 in this EF86 preamp correctly?
  168. Who recognizes the chassis of this amp
  169. Sweep tubes in Push-Pull-Parallel
  170. EZ125 Quad KT88 Project
  171. Need a help! OPT design assistant software
  172. Ready To Build the Other
  173. Harman Kardon Citation II
  174. Relays for tube voltages
  175. Okay, Can someone suggest if this PSU can work
  176. ELROG 211 and 845 tubes
  177. Has anyone tried this tube preamp
  178. filament choke testing
  179. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  180. output transformer sizing - is there such a thing as to big?
  181. Advice for dummies...from a new to the forum dummy
  182. Counterpoint Tech
  183. Line Magnetic 211-IA: Schematic?
  184. Help with harmon kardon a50k
  185. anyone ID these Magnecord amplifiers?
  186. vintage vacuum audio site
  187. Hiraga preamp line+phono 4xECC81 SRPP
  188. Why no simple 2-stage EL34 PP amps?
  189. Dynaco MKIII mod
  190. Blown Up Sir...
  191. Leak stereo20
  192. FFT Hanning Data
  193. Elevated Filament Question
  194. what do you think about this lv linestage?
  195. PCM1798 ECC83/EL84 PP UL balanced combo
  196. I am Trying to Design this Darling Amplifier
  197. Real power pentode recommendation
  198. bridge with CT: can I do that?
  199. Who makes nice pc board for tubes ?
  200. pse300B
  201. 1948 Wireless World - 50 Watt Amp
  202. Akido preamp suggestions.
  203. 6CM5 MKII
  204. DC coupled 6P15P
  205. Switchable 45/VT-52 Amp
  206. Optransformer for 6B4G?
  207. OLSON TUBE AMP AM-158
  208. 6922 preamp idea
  209. Tube SPDIF output
  210. One power tube going hot at idle
  211. schematic to learn by
  212. Audioromy schematic
  213. 8236's
  214. Need a 4060 model on LTSpice
  215. vt86pp 6v6
  216. SALAS hv with 150V
  217. Aikido 12Vac
  218. Looking for expertise in adjusting Williamson amp
  219. Help with elevating a heater supply
  220. Preamp EQ
  221. Need help identifying this amp
  222. Phillips FX737A Rectifier
  223. wiring a transformer on a Scott 299
  224. DC/DC stepup for valve projects
  225. 807 SE Amp
  226. Stromberg Carlson ASR 220C blowing fuse
  227. EF806 pentode + CCS
  228. Transformer Identification
  229. Hickok 800A line adjust problem
  230. Heathkit AA 121 parts
  231. Conrad Johnson PV-8: how to convert 110v to 220v
  232. Help me understand Edcor wiring?
  233. Another paralleled to single push-pull EL84 mod.
  234. Sca35 tone controls
  235. Tube preamp noise
  236. Fountek Tube Amp
  237. Choke & Transformer Positioning Problem
  238. The adventure time tube amp- Did any catch it?
  239. Input wiring question
  240. Let's talk triode-pentode
  241. Tried failed, looking for suggestions
  242. Need HELP converting Bogen MX30a pa into a preamp for recording
  243. Edcor Wrong Transformer...
  244. 812A Build
  245. Still not sure where to start
  246. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  247. RCA tube amp woes/hum/ground
  248. EF86 microphony
  249. John Broskie Kits
  250. Refurbish Conrad Johnson Premier Eight

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