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  1. FYI: MCM 555-7125 Transformer Info
  2. Anyone use 39/44 for audio?
  3. I think its about time for me to design my first Transformer tube amp..
  4. Q: EL84 PP - Bias switch, PS regulation
  5. Balanced to unbalanced converter solution with only one dual triode?
  6. ECL85 G1+G2 Driven Amp Concept - Worth Pursuing?
  7. What is this called? "Triode with active load"?
  8. Type 50 triode amp
  9. Triode strapped C3G
  10. Newbie looking for first tube project. Maggie 9308 or like suggestions?
  11. Poindexter's Musical Machine:Tube Power Supply Schematic
  12. SE EL34 cathode help ?
  13. How to add "Vu-Meters and "Subwoofer Out" to a tube amp...
  14. Audio Research D90... a HOT, buzzing amplifier
  15. Lundahl LL1670 grid choke -- One or two needed for push-pull?
  16. At this stage of my experience almost too afraid to ask
  17. Help with EM7 circuit
  18. Ceramic or plastic noval socket
  19. Need connection info for Thordarson 22S86
  20. Harmon Kardon A500 Redux
  21. Schematic for 2A3/300B SET OTL amp
  22. Bias circuit for fixed bias
  23. Ultrapath with cathode bypass cap: which value of C is correct?
  24. Volume Control Tube Amp / Graaf Graafiti WFB one
  25. Pultec EGP-2 control pannel
  26. Emission values?
  27. Capacitor Upgrade for S5 Electronics (16LS)
  28. 'nipple' in waveform - What is it?
  29. High impedance speaker for SET OTL amps.
  30. Uneven output from LL1677
  31. Ugh. Need help with hum
  32. 6H16B plate follower output stage
  33. Tube preamp 30 gain design with 12ax7
  34. Operating points for 6n2p
  35. Have you tested if two coupling capacitors in parallel are better than one sonically?
  36. DHT filament circuits - best wirewound resistors?
  37. Dual Pentode as two seperate Pentodes.
  38. Double "C" core OPT question
  39. EL34 pentode to triode feedback
  40. Chinese 7308?
  41. DC coupled circuits
  42. Need a complete amp kit for newbie
  43. Making a tube amp
  44. Tube amp diode question
  45. Michaelson Chronos
  46. Preamp question
  47. 6SJ7 and 6SC7 not on roll chart
  48. Graaf GM20 6C33
  49. Does Ultra-Linear SE reduce harmonic distortion?
  50. How to use a 3 prong plug with a Dynaco MkIII?
  51. 6e5-6e6 tube-operating point-absolute maximum rating
  52. LIFePO4 battery cathode bias
  53. Audible Illusions Modulus 3A CD input resistor values
  54. Insulation for component leads in point to point wiring
  55. Advices on first tube amp
  56. 300B Tube Shootout
  57. Unison reasearch Mystery One
  58. 4P10C or 4Π10C tube, any member familiar with?
  59. Largest decoupling cap (DC block on signal path)
  60. Control Grid Feedback (as opposed to Cathode FB) and Miller Capacitance
  61. 211 / 845 ccs?
  62. Eimac 35T any good for an amplifier?
  63. What speaker impedance for a 5 ohm amplifier
  64. Almarro A318B SET Amplifier Simple Modifications For Improved Performance?
  65. Hammond interstage
  66. Bias Arrangement
  67. question about connecting my tube amp to a receiver
  68. Pentode screen bypass capacitor
  69. MINGDA MC845 AA schematics
  70. Faulty Output Transformer
  71. The makings of a nice SEP amp from an audio oscillator?
  72. Audio pot with tap
  73. tube amp and jbl crossover connection
  74. SE EL84 high screen and plate
  75. Marantz 7 line stage with DAC
  76. help with Ecc82/12AU7 selection
  77. Kt88's and 6SN7's?
  78. KR T-1610: What can I do with it?
  79. Schematic
  80. Determining primary output load resistance...
  81. Warning about chokes by Toroidy
  82. Looking af new 845
  83. 807 Amplifier build.....Help Wanted
  84. Claus Byrith 4-30 - HELP !
  85. LR8 as CCS for small tube cathode follower?
  86. Tektronix 120-086 transformer
  87. 01A question
  88. Determining input impedance
  89. Plate to cathode feedback
  90. Quick question about EL84 PSE
  91. P-SET EL34
  92. 6v6 Preamp Explorations
  93. Monoblock kits for $500
  94. Wanted/Needed Vaic Valve / KR 52B etc.
  95. Measuring Rp on the bench
  96. Clarifying RIAA calculations
  97. Emissions Labs 5U4G use statements
  98. Help me pick my first tube kit/winter project (tube preamp)
  99. Please explain feedback to an ignoramus
  100. Op-Amp/Power tube integration
  101. 12b4a preamp project
  102. Pot to Stepping and ohmic value change
  103. McIntosh MC2000
  104. universal high-gain pre-amp useful ?
  105. 6AX5, the forgotten rectifier?
  106. High gain pentode LTP?
  107. question with heater wiring
  108. Ideas for an hi-fi mono amplifier (and preamplifier)
  109. humm and buzz
  110. ECC88 For LTP
  111. Polam / Telam tubes !
  112. Question about grid input signal voltage
  113. Douk EL34 Amp kit
  114. ID help Please Hammond Amp
  115. rolling ecc88 into a 6cg7 socket
  116. Article Wanted - "High Quality Amplifier with the 6AS7G" by McProud
  117. capacitors
  118. Need a little WE 597A help
  119. Need to find - Triode Va=500V, Mu=20
  120. The Pomato, A hybrid can amp
  121. audio research sp16 phono no rec
  122. Effect of raising and lowering B+
  123. Ideas for tube amp EL34/ECC83 single ended
  124. The HiFi show 2015 UK
  125. Coupling capacitors
  126. Brook 12A
  127. Importance of plate voltage on overall performance
  128. Help Precision Fidelity M-7 amp
  129. And so it begins...
  130. What is the cream of the crop for DIY tubes kits?
  131. Amplifier Build - Suggestions
  132. 26DQ5 curves pin out
  133. Toroidal Transformer Upgrade for S5 Electronics K-16LS Kit
  134. VR tube RF issues
  135. usb and 3.5 to same pre
  136. Gain changing on 6n3 tube buffer
  137. Kelvin Capacitors
  138. simple question about on off switch
  139. Engineers Amp chassis
  140. First tube amp design, what are my mistakes?
  141. US 6L6GC identification
  142. PL508 triode curves, help !!!
  143. Multiple gain stages without continually increasing B+
  144. Choke and Capacitor input filters on a same winding?
  145. Any advice value for Volume control if....
  146. For tube lovers-Henry Wolcott Amplifiers from JBL PL100
  147. Help translate stamp mark on russian tube
  148. UK Engineers Amp (my first project)
  149. 12AX7 Heater pin 9
  150. Help With Translating Schematic
  151. Do diodes in the power section produce heat?
  152. you gotta laugh......really!!
  153. why is dc coupled better ?
  154. ARC grounding question
  155. Littles modifications of Triode Dick's KT88 MonoBill Classic
  156. New 6BG6G Amp
  157. Aesthetix Rhea Power Supply voltages
  158. Newbie - Broken Valve amp help!!
  159. New Build - Geraldine SE Amp
  160. Michaelson&Austin save attempt
  161. LTspice model needed....6JN6
  162. Big distortion of tube amplifier at high frequencies
  163. Radio Tubes Classifieds
  164. Sad and Lonely 6X4 Rectifier
  165. The Wild, Weird, World of GNF
  166. My first tube amp is here!!!
  167. Retro nixie volume indicator
  168. how to connect my corrent output DAC to my preamp TUBE?
  169. Roberts 770x / Akai M8 Tube Amplifier Question
  170. Conrad Johnson MV50 adjustment?
  171. Hum in console preamp after power supply rebuild
  172. Electrohome console amp?
  173. input impedance of mullard 3-3 amplifier....
  174. 6X4 Tube Rectifier Bridge
  175. can I use a zener for cathode bias
  176. Dual 5V winding 5AR4
  177. el84 test jig circuit
  178. anyone use knife switches for input selection???
  179. suggestions wanted for otl design
  180. Converting a single ended amp to parafeed
  181. Online stores for ordering Hitachi Metglas cores?
  182. Box of old tubes
  183. tube preamp
  184. bypassing balance control on VTL Deluxe
  185. Allegro II power amplifier
  186. ECF80 rating
  187. 71a pp parallel
  188. Hammond transformer 1627SEA
  189. Final schematic of my SET amplifier (drilling the chassis of my ex Boyuu china amp)
  190. Building Tube Amp DVD from Australia
  191. Tube preamp
  192. Bigger amp building help
  193. Balanced tube RIAA Preamplifier - Idea Search
  194. One tube brighter/hotter than the others
  195. HMV 2001 1953 record player circuit
  196. D3a - diode between screen & plate (triode) ?
  197. Radiotron/Eli Duttman phono change C1 to .00391?
  198. Mating Martin logan summits with VTL 125s has been a challenge
  199. Learning to Build A Tube Amplifier
  200. how to determine if an output transformer has blown?
  201. Secondary Emission Tetrode
  202. Monster Transformer Has Arrived
  203. wiring tubes in series
  204. Rogers E20a/Audio Note transformer
  205. PCL86 Amplifier
  206. Beard BB100 P35 project
  207. 6p15p
  208. help with paul hynes reg
  209. Vinyl Savor 6CB5A SE Amps?
  210. VTL Deluxe tube mystery
  211. My First SPUD Amp, 6EM7
  212. GK-71 SE amp
  213. 12ax7 Phono Preamplifier
  214. Aikido 6GM8 (ECC86) HPA or How I built a tube amp with non-scary voltages
  215. "Langham" Phase Inverter Origin?
  216. Adding "tube sound" via inline circuit
  217. Radford STA25 Renaissance - HELP!
  218. Capacitor across B+ and the input signal on the primary of the output transformer
  219. Zenith KPS-80 Rebuild
  220. 50+ watt diy tube amp recommedations
  221. Trouble with PSUD 2 high current / low voltage
  222. Magnavox 175 clone w/Fisher OPTs?
  223. First post here, need some help with PSU for amplifier
  224. Novice build of 6EM7 circuit. PSU advice.
  225. All DHT single-ended 211 amp suggestion?
  226. Adding inputs to Melody SP3 mk2
  227. Repurpose vertical output autoformer?
  228. Good ECL84 / 6DX8 Tube - Correct Pentode Spice Model Needed!!!
  229. Assistance with 211 powerdrive type design
  230. Passive pre for kt88 push pull
  231. Current production tubes testing used/low out of the box?
  232. Safe to use bare (laquered) copper wire for heaters?
  233. 10W+10W EL34+ECC83 single-ended Class A Stereo amplifier Kit wlx
  234. Testing Volume Controls
  235. Rowe R-4359A Amplifier
  236. Converting pentode to triode
  237. Nuvistor heater current inrush question
  238. Stereo Pre-amp build issues
  239. Triode 843
  240. 12ax7 preamp tube for jolida 1501BRC
  241. Volume pot for tube preamp
  242. I finally won my fight to kill the hum, but not clear why
  243. HK A500 phono issues
  244. Parallel Damper Tubes for Voltage Doubler
  245. Good schematic (circuit) with tube 12ax7
  246. Potientiameter
  247. HH Scott 299C tube integrated amp channel B music comes on after 15 mins to 20 mins?
  248. transformer wiring
  249. Looking for help with my Emotive Audio ETA Amplifier
  250. Running tubes' filament on DC

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