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  1. HELP NEEDED for a 6CA4/EZ81 power supply
  2. OT for 2A3 PSE w/Parafeed
  3. More Dynaco Mark VI Questions
  4. curious feedback in circuit of Pioneer SM-Q300 receiver
  5. Hytron 2E25 - Other forgotten and marvelous tube !
  6. need tube upgrade advice please sir
  7. buyer beware
  8. Analog tube for DAC & Power supply with valve EZ_80
  9. JJ 5y3S pin 1??
  10. My first Sansui AU-111 Rebuild
  11. Capacitor-induced distortion
  12. Elevating Heater Voltage with multiple Transformer Heater Secondaries
  13. Common Cathode as DAC output
  14. Pre-Amp with russian tubes 1j24b
  15. How to calculate, the output impedance of a tube with grounded grid
  16. How To Draw Load Line With Output Transformer ?
  17. Inter electrode capacitance.
  18. My amp is an oscillator !
  19. TESLA PL509
  20. What value for Va ?
  21. Help selecting an input transformer ?
  22. Should same valves grid voltage vary much ?
  23. Driver options for 300B-XLS (4P1L-IS-4P1L-IS)
  24. Restoring a Scott 299-B
  25. Latest project, 80 watt valve amplifier
  26. PP Amp Doubling Output Power
  27. Setting up a Wilson current mirror as a differential load
  28. interested in tube amps
  29. Baldwin 45P amp project
  30. DIYGene's Jadis JP-200 Preamp Kit
  31. Need design/schematic for 6H30P driven 6C33C SET
  32. Substitute 6AQ8 for my 6CG7's
  33. 6bq5 tubes in a Heathkit AA-151
  34. Marantz 8b restoration: colour code, prints, schematics
  35. Show me your screen drive circuits
  36. Potting Compounds
  37. Chokes in the ground "plane"
  38. OTL idea
  39. Balance control tip for newbee's
  40. Ebay win - is this any good?
  41. 6sn7 pse amp for altec lansing 604E
  42. "Cockeyed Bridge" with damper diode?
  43. Mac 2100 Hybrid
  44. Single-Stage Hybrid Cascode Power Amp
  45. New to Tube amps, heathkit question
  46. 6AS7 OTL PL build
  47. On Bootstrapping diodes for UL G2 MOSFET
  48. Chasing Aikido "hum"
  49. valve monobloc designs
  50. 7A5 is a good driver for the 300B ?
  51. Parallel Push Pull 6V6 design
  52. Black cat caps?
  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. Crate Palomino V8 potentiometer replacement
  120. Question about failing 6550 output
  121. Need help converting Ampex 960 R2R to a preamp...
  122. 5751 SPICE Model -- for Poddwatt II
  123. Configuring an Audio Transformer for 8 Ohmsuring
  124. OTL Blocking cap / RC filter
  125. What do you think..OP Tx
  126. Does anyone have GA399MA.pdf?
  127. New Amp Build, First Post
  128. Twisting HV leads
  129. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  130. Help with AVO MK IV Meter
  131. Why use a pentode?
  132. Filter choke temperature concerns
  133. Is my output transformer damaged?
  134. Parafeed without a cap
  135. Edcor Transformer Problems
  136. From The Daft Idea Department
  137. Do I need a resistor between plates? pic included.
  138. Tube preamp overheating characteristics?
  139. Valve amplifier sounds great
  140. volume pot hum at low and high volume
  141. Thank You
  142. Help Needed ;)
  143. Mullard EL-34: new vs vintage
  144. A new IC for monitoring tubes
  145. 6L6 transformer on EL84
  146. Output transformer design
  147. Tubes4HiFi preamp questions
  148. Newbie advice - Phono Preamp/1st electronics build
  149. Got a HeathKit, now what to do?
  150. 4P1L push pull amp with Lundahl zero global feedback
  151. 12AQ5 SE Amp Issue
  152. ISO a motorboat
  153. Tube characteristic - Originates from pre or power amp tubes?
  154. swapping console amps...
  155. swapping console amps...
  156. Hum issue in PAS Aikido
  157. Hammond Transformer Warranty
  158. 6CB5 in triode PP?
  159. Input capacitance when tube is not conducting
  160. What would you build with these output transformers?
  161. Need help with new tube for my amp
  162. Does the method for loading the plate affect gain of the stage?
  163. Slightly Sick Amplifier
  164. OP Tx for signal tubes in Headphone amps
  165. Listing of Radio Amateur/HAM Flea Markets In Europe
  166. need mac kit 30 transformer
  167. Is this transformer saturation? (pictures inside)
  168. Did I use the LR8 in this EF86 preamp correctly?
  169. Who recognizes the chassis of this amp
  170. Sweep tubes in Push-Pull-Parallel
  171. EZ125 Quad KT88 Project
  172. Need a help! OPT design assistant software
  173. Ready To Build the Other
  174. Harman Kardon Citation II
  175. Relays for tube voltages
  176. Okay, Can someone suggest if this PSU can work
  177. ELROG 211 and 845 tubes
  178. Has anyone tried this tube preamp
  179. filament choke testing
  180. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  181. output transformer sizing - is there such a thing as to big?
  182. Advice for dummies...from a new to the forum dummy
  183. Counterpoint Tech
  184. Line Magnetic 211-IA: Schematic?
  185. Help with harmon kardon a50k
  186. anyone ID these Magnecord amplifiers?
  187. vintage vacuum audio site
  188. Hiraga preamp line+phono 4xECC81 SRPP
  189. Why no simple 2-stage EL34 PP amps?
  190. Dynaco MKIII mod
  191. Blown Up Sir...
  192. Leak stereo20
  193. FFT Hanning Data
  194. Elevated Filament Question
  195. what do you think about this lv linestage?
  196. PCM1798 ECC83/EL84 PP UL balanced combo
  197. I am Trying to Design this Darling Amplifier
  198. Real power pentode recommendation
  199. bridge with CT: can I do that?
  200. Who makes nice pc board for tubes ?
  201. pse300B
  202. 1948 Wireless World - 50 Watt Amp
  203. Akido preamp suggestions.
  204. 6CM5 MKII
  205. DC coupled 6P15P
  206. Switchable 45/VT-52 Amp
  207. Optransformer for 6B4G?
  208. OLSON TUBE AMP AM-158
  209. 6922 preamp idea
  210. Tube SPDIF output
  211. One power tube going hot at idle
  212. schematic to learn by
  213. Audioromy schematic
  214. 8236's
  215. Need a 4060 model on LTSpice
  216. vt86pp 6v6
  217. SALAS hv with 150V
  218. Fender Tweed Champ Kits/Parts
  219. Aikido 12Vac
  220. Looking for expertise in adjusting Williamson amp
  221. Help with elevating a heater supply
  222. Preamp EQ
  223. Need help identifying this amp
  224. Phillips FX737A Rectifier
  225. wiring a transformer on a Scott 299
  226. DC/DC stepup for valve projects
  227. 807 SE Amp
  228. HELP With VOX AC100CPH
  229. Stromberg Carlson ASR 220C blowing fuse
  230. EF806 pentode + CCS
  231. Transformer Identification
  232. Hickok 800A line adjust problem
  233. Heathkit AA 121 parts
  234. Conrad Johnson PV-8: how to convert 110v to 220v
  235. Help me understand Edcor wiring?
  236. Another paralleled to single push-pull EL84 mod.
  237. Sca35 tone controls
  238. Tube preamp noise
  239. Fountek Tube Amp
  240. Choke & Transformer Positioning Problem
  241. The adventure time tube amp- Did any catch it?
  242. Input wiring question
  243. Let's talk triode-pentode
  244. Tried failed, looking for suggestions
  245. Need HELP converting Bogen MX30a pa into a preamp for recording
  246. Edcor Wrong Transformer...
  247. 812A Build
  248. Still not sure where to start
  249. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  250. RCA tube amp woes/hum/ground

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