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  1. OTL idea
  2. Balance control tip for newbee's
  3. Ebay win - is this any good?
  4. 6sn7 pse amp for altec lansing 604E
  5. "Cockeyed Bridge" with damper diode?
  6. Mac 2100 Hybrid
  7. Single-Stage Hybrid Cascode Power Amp
  8. New to Tube amps, heathkit question
  9. 6AS7 OTL PL build
  10. On Bootstrapping diodes for UL G2 MOSFET
  11. Chasing Aikido "hum"
  12. valve monobloc designs
  13. 7A5 is a good driver for the 300B ?
  14. Parallel Push Pull 6V6 design
  15. Black cat caps?
  16. Soundstage
  17. Brains & Brawn CF : where's the catch ?
  18. ISO-TANGO to quit
  19. Shifting reflective loads using secondary taps?
  20. VTL -- 20 6550's a side and their xfmrs
  21. "Diamond" tube preamp with 12au7
  22. Wich factory made this tube ?
  23. Bootstrapped Cathode Coupled Amplifier
  24. OTL 6AS7
  25. Diode performance testing
  26. Monacor SA-10
  27. Volume Control Hum
  28. Stromberg-Carlson AP-50
  29. 5 wire and 3 wire output transformer change ?
  30. Yaqin mc 10L
  31. Can OTL Ciclotron amp use solid state regulated PS?
  32. Cross-channel overtalk with strange effects
  33. Why 6.3V?
  34. KT88 Williamson Design Questions
  35. Winding a center-tap secondary
  36. HV delay switch
  37. McIntosh MC-30...Balanced Input Feasible?
  38. Designing line driver / pre-amp
  39. Bucking and boosting a tube power transformer
  40. 33A-158M
  41. All DHT integrated amp
  42. 6N1P
  43. basic query - Pete Millett 807 board.
  44. Tube Tester with undocumented tubes
  45. "Fritz" the Boston/RI tube guy - ANYONE know what became of him??
  46. EI yugoslavia gone forever.
  47. Quicksilver 8417 Design - Stay with it or modify?
  48. Looking for some advice on odd preamp noise issue
  49. Tubes in an opamp feedback loop ?
  50. Jensen P-P Cathode Follower
  51. Cathode follower rigorous definition.
  52. Little Bear P3 ?!?! opinions ?
  53. NOS GU-81
  54. OPT endbell color!
  55. Music Angel kt88 with unbalanced output.. help me!
  56. Heater Supply Center Tap
  57. SCA-35 Pot noise
  58. Conrad Johnson MV 55
  59. Comments on 6C33C-B ARG OTL
  60. Construction tips for high voltage amps.
  61. 6L6 bias
  62. came across Mingda Tube king mono blocks
  63. a lot of noise
  64. El84 pp Amp problem
  65. Power on filament current surge question
  66. Its likely a repost but W/e
  67. Scored some 8236's....
  68. What causes valve to glow red inside ?
  69. Tubes and radioisotope decay
  70. PSUDII Question
  71. DIY Bias Buddy
  72. Recommend me a high power OPT
  73. Design Shorting Tubes?
  74. Microsoft Tube Amp and Speakers
  75. S5 K-16LS Tone Control - Help Please
  76. SEUL Circuit for PL519, has anyone here built this?
  77. Motorola three channel
  78. Your own builders book
  79. WE91A - high frequency roll off
  80. Dynaco MarkIII dimensions
  81. Leak TL12+ smoothing capacitors.
  82. Crate Palomino V8 potentiometer replacement
  83. Question about failing 6550 output
  84. Need help converting Ampex 960 R2R to a preamp...
  85. 5751 SPICE Model -- for Poddwatt II
  86. Configuring an Audio Transformer for 8 Ohmsuring
  87. OTL Blocking cap / RC filter
  88. What do you think..OP Tx
  89. Does anyone have GA399MA.pdf?
  90. New Amp Build, First Post
  91. Twisting HV leads
  92. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  93. Help with AVO MK IV Meter
  94. Why use a pentode?
  95. Filter choke temperature concerns
  96. Is my output transformer damaged?
  97. Parafeed without a cap
  98. Edcor Transformer Problems
  99. From The Daft Idea Department
  100. Do I need a resistor between plates? pic included.
  101. Tube preamp overheating characteristics?
  102. Valve amplifier sounds great
  103. volume pot hum at low and high volume
  104. Thank You
  105. Help Needed ;)
  106. Mullard EL-34: new vs vintage
  107. A new IC for monitoring tubes
  108. 6L6 transformer on EL84
  109. Output transformer design
  110. Tubes4HiFi preamp questions
  111. Newbie advice - Phono Preamp/1st electronics build
  112. Got a HeathKit, now what to do?
  113. 4P1L push pull amp with Lundahl zero global feedback
  114. 12AQ5 SE Amp Issue
  115. ISO a motorboat
  116. Tube characteristic - Originates from pre or power amp tubes?
  117. swapping console amps...
  118. swapping console amps...
  119. Hum issue in PAS Aikido
  120. Hammond Transformer Warranty
  121. 6CB5 in triode PP?
  122. Input capacitance when tube is not conducting
  123. What would you build with these output transformers?
  124. Need help with new tube for my amp
  125. Does the method for loading the plate affect gain of the stage?
  126. Slightly Sick Amplifier
  127. OP Tx for signal tubes in Headphone amps
  128. Listing of Radio Amateur/HAM Flea Markets In Europe
  129. need mac kit 30 transformer
  130. Is this transformer saturation? (pictures inside)
  131. Did I use the LR8 in this EF86 preamp correctly?
  132. Who recognizes the chassis of this amp
  133. Sweep tubes in Push-Pull-Parallel
  134. EZ125 Quad KT88 Project
  135. Need a help! OPT design assistant software
  136. Ready To Build the Other
  137. Harman Kardon Citation II
  138. Relays for tube voltages
  139. Okay, Can someone suggest if this PSU can work
  140. ELROG 211 and 845 tubes
  141. Has anyone tried this tube preamp
  142. filament choke testing
  143. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  144. output transformer sizing - is there such a thing as to big?
  145. Advice for dummies...from a new to the forum dummy
  146. Counterpoint Tech
  147. Line Magnetic 211-IA: Schematic?
  148. Help with harmon kardon a50k
  149. anyone ID these Magnecord amplifiers?
  150. vintage vacuum audio site
  151. Hiraga preamp line+phono 4xECC81 SRPP
  152. Why no simple 2-stage EL34 PP amps?
  153. Dynaco MKIII mod
  154. Blown Up Sir...
  155. Leak stereo20
  156. FFT Hanning Data
  157. Elevated Filament Question
  158. what do you think about this lv linestage?
  159. PCM1798 ECC83/EL84 PP UL balanced combo
  160. I am Trying to Design this Darling Amplifier
  161. Real power pentode recommendation
  162. bridge with CT: can I do that?
  163. Who makes nice pc board for tubes ?
  164. pse300B
  165. 1948 Wireless World - 50 Watt Amp
  166. Akido preamp suggestions.
  167. 6CM5 MKII
  168. DC coupled 6P15P
  169. Switchable 45/VT-52 Amp
  170. Optransformer for 6B4G?
  171. OLSON TUBE AMP AM-158
  172. 6922 preamp idea
  173. Tube SPDIF output
  174. One power tube going hot at idle
  175. schematic to learn by
  176. Audioromy schematic
  177. 8236's
  178. Need a 4060 model on LTSpice
  179. vt86pp 6v6
  180. SALAS hv with 150V
  181. Fender Tweed Champ Kits/Parts
  182. Aikido 12Vac
  183. Looking for expertise in adjusting Williamson amp
  184. Help with elevating a heater supply
  185. Preamp EQ
  186. Need help identifying this amp
  187. Phillips FX737A Rectifier
  188. wiring a transformer on a Scott 299
  189. DC/DC stepup for valve projects
  190. 807 SE Amp
  191. HELP With VOX AC100CPH
  192. Stromberg Carlson ASR 220C blowing fuse
  193. EF806 pentode + CCS
  194. Transformer Identification
  195. Hickok 800A line adjust problem
  196. Heathkit AA 121 parts
  197. Conrad Johnson PV-8: how to convert 110v to 220v
  198. Help me understand Edcor wiring?
  199. Another paralleled to single push-pull EL84 mod.
  200. Sca35 tone controls
  201. Tube preamp noise
  202. Fountek Tube Amp
  203. Choke & Transformer Positioning Problem
  204. The adventure time tube amp- Did any catch it?
  205. Input wiring question
  206. Let's talk triode-pentode
  207. Tried failed, looking for suggestions
  208. Need HELP converting Bogen MX30a pa into a preamp for recording
  209. Edcor Wrong Transformer...
  210. 812A Build
  211. Still not sure where to start
  212. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  213. RCA tube amp woes/hum/ground
  214. EF86 microphony
  215. John Broskie Kits
  216. Refurbish Conrad Johnson Premier Eight
  217. 4tube Philco amp project...
  218. Thoughts on bias for PPP
  219. 2012's Acquired Parts- ..Custom Build Anyone?
  220. Can I use a variable voltage cieling fan switch as a variac?
  221. Audio research LS2 hiss and hum... need help
  222. saba electro sound
  223. Ra on C3g and 6C45pi?
  224. Partial Feedback System
  225. An Electronic Loss Compressor
  226. K-12g one channel louder than the other
  227. Sun SV2a3 or 45?
  228. Red imP(asse)
  229. An application of C-Vac: the SolidGlass amplifier
  230. Fixing crooked laminate stacks?
  231. EF184 driver
  232. Woo Audio WA7 temperature
  233. Resistor w/cap or LED or battery bias?
  234. Transformers Back to back vs. Voltage Doubler
  235. 211: 75W or 100W?
  236. Does really need a balanced preamp ?
  237. Power Transformer Hum
  238. Options for how to use this old tube PA amp? > 200W
  239. Flash getter question
  240. Heath W4 Output Xfmr - anyone measure one??
  241. Tube buffer with 6n3-EV
  242. First time with hi-fi, need some advise with amp desing
  243. Newbie wants to build SET 6C33C
  244. Another PP GU50
  245. SE Waveform
  246. Problem with CCS for filaments
  247. UL / Distributed Load - Screen vs. CFB Winding Ratios
  248. 50W PP - KT88 Build
  249. OP Tx and PPP to PP change over
  250. I need a little more advice on a Glassware Janus shunt regularor

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