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  1. Marantz 8b power transformer B+ down 30%
  2. Single or paralell trafo?
  3. CJ PV 5 Impedance?
  4. ECF80 driving EL84 PP
  5. Luhdahl LL1660S what current rating for D3a driver?
  6. what's that cap?
  7. SE EL84 Component placement Suggestion
  8. How to make a cheap 6N3 Buffer Amp even better?
  9. buying Tube Amps need advice/opinions
  10. dynaco pas3
  11. 5U4GB full-wave bridge, stumped
  12. HELP NEEDED for a 6CA4/EZ81 power supply
  13. OT for 2A3 PSE w/Parafeed
  14. More Dynaco Mark VI Questions
  15. curious feedback in circuit of Pioneer SM-Q300 receiver
  16. Hytron 2E25 - Other forgotten and marvelous tube !
  17. need tube upgrade advice please sir
  18. buyer beware
  19. JJ 5y3S pin 1??
  20. My first Sansui AU-111 Rebuild
  21. Capacitor-induced distortion
  22. Elevating Heater Voltage with multiple Transformer Heater Secondaries
  23. Common Cathode as DAC output
  24. Pre-Amp with russian tubes 1j24b
  25. How to calculate, the output impedance of a tube with grounded grid
  26. How To Draw Load Line With Output Transformer ?
  27. Inter electrode capacitance.
  28. My amp is an oscillator !
  29. TESLA PL509
  30. What value for Va ?
  31. Help selecting an input transformer ?
  32. Should same valves grid voltage vary much ?
  33. Driver options for 300B-XLS (4P1L-IS-4P1L-IS)
  34. Restoring a Scott 299-B
  35. Latest project, 80 watt valve amplifier
  36. PP Amp Doubling Output Power
  37. Setting up a Wilson current mirror as a differential load
  38. interested in tube amps
  39. Baldwin 45P amp project
  40. DIYGene's Jadis JP-200 Preamp Kit
  41. Need design/schematic for 6H30P driven 6C33C SET
  42. Substitute 6AQ8 for my 6CG7's
  43. 6bq5 tubes in a Heathkit AA-151
  44. Marantz 8b restoration: colour code, prints, schematics
  45. Show me your screen drive circuits
  46. Potting Compounds
  47. Chokes in the ground "plane"
  48. OTL idea
  49. Balance control tip for newbee's
  50. Ebay win - is this any good?
  51. 6sn7 pse amp for altec lansing 604E
  52. "Cockeyed Bridge" with damper diode?
  53. Mac 2100 Hybrid
  54. Single-Stage Hybrid Cascode Power Amp
  55. New to Tube amps, heathkit question
  56. 6AS7 OTL PL build
  57. On Bootstrapping diodes for UL G2 MOSFET
  58. Chasing Aikido "hum"
  59. valve monobloc designs
  60. 7A5 is a good driver for the 300B ?
  61. Parallel Push Pull 6V6 design
  62. Soundstage
  63. Brains & Brawn CF : where's the catch ?
  64. ISO-TANGO to quit
  65. Shifting reflective loads using secondary taps?
  66. VTL -- 20 6550's a side and their xfmrs
  67. "Diamond" tube preamp with 12au7
  68. Wich factory made this tube ?
  69. Bootstrapped Cathode Coupled Amplifier
  70. OTL 6AS7
  71. Diode performance testing
  72. Monacor SA-10
  73. Volume Control Hum
  74. Stromberg-Carlson AP-50
  75. 5 wire and 3 wire output transformer change ?
  76. Yaqin mc 10L
  77. Can OTL Ciclotron amp use solid state regulated PS?
  78. Cross-channel overtalk with strange effects
  79. Why 6.3V?
  80. KT88 Williamson Design Questions
  81. Winding a center-tap secondary
  82. HV delay switch
  83. McIntosh MC-30...Balanced Input Feasible?
  84. Designing line driver / pre-amp
  85. Bucking and boosting a tube power transformer
  86. 33A-158M
  87. All DHT integrated amp
  88. 6N1P
  89. basic query - Pete Millett 807 board.
  90. "Fritz" the Boston/RI tube guy - ANYONE know what became of him??
  91. EI yugoslavia gone forever.
  92. Quicksilver 8417 Design - Stay with it or modify?
  93. Looking for some advice on odd preamp noise issue
  94. Tubes in an opamp feedback loop ?
  95. Jensen P-P Cathode Follower
  96. Cathode follower rigorous definition.
  97. Little Bear P3 ?!?! opinions ?
  98. NOS GU-81
  99. OPT endbell color!
  100. Music Angel kt88 with unbalanced output.. help me!
  101. Heater Supply Center Tap
  102. SCA-35 Pot noise
  103. Conrad Johnson MV 55
  104. Comments on 6C33C-B ARG OTL
  105. Construction tips for high voltage amps.
  106. 6L6 bias
  107. came across Mingda Tube king mono blocks
  108. a lot of noise
  109. El84 pp Amp problem
  110. Power on filament current surge question
  111. Its likely a repost but W/e
  112. Scored some 8236's....
  113. What causes valve to glow red inside ?
  114. Tubes and radioisotope decay
  115. PSUDII Question
  116. DIY Bias Buddy
  117. Recommend me a high power OPT
  118. Design Shorting Tubes?
  119. Microsoft Tube Amp and Speakers
  120. S5 K-16LS Tone Control - Help Please
  121. SEUL Circuit for PL519, has anyone here built this?
  122. Motorola three channel
  123. Your own builders book
  124. WE91A - high frequency roll off
  125. Dynaco MarkIII dimensions
  126. Leak TL12+ smoothing capacitors.
  127. Question about failing 6550 output
  128. Need help converting Ampex 960 R2R to a preamp...
  129. 5751 SPICE Model -- for Poddwatt II
  130. Configuring an Audio Transformer for 8 Ohmsuring
  131. OTL Blocking cap / RC filter
  132. What do you think..OP Tx
  133. Does anyone have GA399MA.pdf?
  134. New Amp Build, First Post
  135. Twisting HV leads
  136. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  137. Why use a pentode?
  138. Filter choke temperature concerns
  139. Is my output transformer damaged?
  140. Parafeed without a cap
  141. Edcor Transformer Problems
  142. From The Daft Idea Department
  143. Do I need a resistor between plates? pic included.
  144. Tube preamp overheating characteristics?
  145. Valve amplifier sounds great
  146. volume pot hum at low and high volume
  147. Thank You
  148. Help Needed ;)
  149. Mullard EL-34: new vs vintage
  150. A new IC for monitoring tubes
  151. 6L6 transformer on EL84
  152. Output transformer design
  153. Tubes4HiFi preamp questions
  154. Newbie advice - Phono Preamp/1st electronics build
  155. Got a HeathKit, now what to do?
  156. 4P1L push pull amp with Lundahl zero global feedback
  157. 12AQ5 SE Amp Issue
  158. ISO a motorboat
  159. Tube characteristic - Originates from pre or power amp tubes?
  160. swapping console amps...
  161. swapping console amps...
  162. Hum issue in PAS Aikido
  163. Hammond Transformer Warranty
  164. 6CB5 in triode PP?
  165. Input capacitance when tube is not conducting
  166. What would you build with these output transformers?
  167. Need help with new tube for my amp
  168. Does the method for loading the plate affect gain of the stage?
  169. Slightly Sick Amplifier
  170. OP Tx for signal tubes in Headphone amps
  171. need mac kit 30 transformer
  172. Is this transformer saturation? (pictures inside)
  173. Did I use the LR8 in this EF86 preamp correctly?
  174. Who recognizes the chassis of this amp
  175. Sweep tubes in Push-Pull-Parallel
  176. EZ125 Quad KT88 Project
  177. Need a help! OPT design assistant software
  178. Ready To Build the Other
  179. Harman Kardon Citation II
  180. Relays for tube voltages
  181. Okay, Can someone suggest if this PSU can work
  182. ELROG 211 and 845 tubes
  183. Has anyone tried this tube preamp
  184. filament choke testing
  185. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  186. output transformer sizing - is there such a thing as to big?
  187. Advice for dummies...from a new to the forum dummy
  188. Counterpoint Tech
  189. Line Magnetic 211-IA: Schematic?
  190. Help with harmon kardon a50k
  191. anyone ID these Magnecord amplifiers?
  192. vintage vacuum audio site
  193. Hiraga preamp line+phono 4xECC81 SRPP
  194. Why no simple 2-stage EL34 PP amps?
  195. Dynaco MKIII mod
  196. Blown Up Sir...
  197. Leak stereo20
  198. FFT Hanning Data
  199. Elevated Filament Question
  200. what do you think about this lv linestage?
  201. PCM1798 ECC83/EL84 PP UL balanced combo
  202. I am Trying to Design this Darling Amplifier
  203. Real power pentode recommendation
  204. bridge with CT: can I do that?
  205. Who makes nice pc board for tubes ?
  206. pse300B
  207. 1948 Wireless World - 50 Watt Amp
  208. Akido preamp suggestions.
  209. 6CM5 MKII
  210. DC coupled 6P15P
  211. Switchable 45/VT-52 Amp
  212. Optransformer for 6B4G?
  213. OLSON TUBE AMP AM-158
  214. 6922 preamp idea
  215. Tube SPDIF output
  216. One power tube going hot at idle
  217. schematic to learn by
  218. Audioromy schematic
  219. 8236's
  220. Need a 4060 model on LTSpice
  221. vt86pp 6v6
  222. SALAS hv with 150V
  223. Aikido 12Vac
  224. Looking for expertise in adjusting Williamson amp
  225. Help with elevating a heater supply
  226. Preamp EQ
  227. Need help identifying this amp
  228. Phillips FX737A Rectifier
  229. wiring a transformer on a Scott 299
  230. DC/DC stepup for valve projects
  231. 807 SE Amp
  232. Stromberg Carlson ASR 220C blowing fuse
  233. EF806 pentode + CCS
  234. Transformer Identification
  235. Heathkit AA 121 parts
  236. Conrad Johnson PV-8: how to convert 110v to 220v
  237. Help me understand Edcor wiring?
  238. Another paralleled to single push-pull EL84 mod.
  239. Sca35 tone controls
  240. Tube preamp noise
  241. Fountek Tube Amp
  242. Choke & Transformer Positioning Problem
  243. The adventure time tube amp- Did any catch it?
  244. Input wiring question
  245. Let's talk triode-pentode
  246. Tried failed, looking for suggestions
  247. Need HELP converting Bogen MX30a pa into a preamp for recording
  248. Edcor Wrong Transformer...
  249. 812A Build
  250. Still not sure where to start

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