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  1. Littles modifications of Triode Dick's KT88 MonoBill Classic
  2. New 6BG6G Amp
  3. Aesthetix Rhea Power Supply voltages
  4. Newbie - Broken Valve amp help!!
  5. New Build - Geraldine SE Amp
  6. Michaelson & Austin save attempt
  7. LTspice model needed....6JN6
  8. Big distortion of tube amplifier at high frequencies
  9. Radio Tubes Classifieds
  10. Sad and Lonely 6X4 Rectifier
  11. The Wild, Weird, World of GNF
  12. My first tube amp is here!!!
  13. Retro nixie volume indicator
  14. how to connect my corrent output DAC to my preamp TUBE?
  15. Roberts 770x / Akai M8 Tube Amplifier Question
  16. Conrad Johnson MV50 adjustment?
  17. Hum in console preamp after power supply rebuild
  18. Electrohome console amp?
  19. input impedance of mullard 3-3 amplifier....
  20. 6X4 Tube Rectifier Bridge
  21. can I use a zener for cathode bias
  22. Dual 5V winding 5AR4
  23. el84 test jig circuit
  24. suggestions wanted for otl design
  25. Converting a single ended amp to parafeed
  26. Online stores for ordering Hitachi Metglas cores?
  27. Box of old tubes
  28. tube preamp
  29. bypassing balance control on VTL Deluxe
  30. Allegro II power amplifier
  31. ECF80 rating
  32. 71a pp parallel
  33. Hammond transformer 1627SEA
  34. Final schematic of my SET amplifier (drilling the chassis of my ex Boyuu china amp)
  35. Building Tube Amp DVD from Australia
  36. Tube preamp
  37. Bigger amp building help
  38. Balanced tube RIAA Preamplifier - Idea Search
  39. One tube brighter/hotter than the others
  40. HMV 2001 1953 record player circuit
  41. D3a - diode between screen & plate (triode) ?
  42. Radiotron/Eli Duttman phono change C1 to .00391?
  43. Mating Martin logan summits with VTL 125s has been a challenge
  44. Learning to Build A Tube Amplifier
  45. how to determine if an output transformer has blown?
  46. Secondary Emission Tetrode
  47. Monster Transformer Has Arrived
  48. wiring tubes in series
  49. Rogers E20a/Audio Note transformer
  50. PCL86 Amplifier
  51. Beard BB100 P35 project
  52. 6p15p
  53. help with paul hynes reg
  54. Vinyl Savor 6CB5A SE Amps?
  55. VTL Deluxe tube mystery
  56. My First SPUD Amp, 6EM7
  57. GK-71 SE amp
  58. 12ax7 Phono Preamplifier
  59. Aikido 6GM8 (ECC86) HPA or How I built a tube amp with non-scary voltages
  60. "Langham" Phase Inverter Origin?
  61. Adding "tube sound" via inline circuit
  62. Radford STA25 Renaissance - HELP!
  63. Capacitor across B+ and the input signal on the primary of the output transformer
  64. Zenith KPS-80 Rebuild
  65. 50+ watt diy tube amp recommedations
  66. Trouble with PSUD 2 high current / low voltage
  67. Magnavox 175 clone w/Fisher OPTs?
  68. First post here, need some help with PSU for amplifier
  69. Novice build of 6EM7 circuit. PSU advice.
  70. All DHT single-ended 211 amp suggestion?
  71. Adding inputs to Melody SP3 mk2
  72. Repurpose vertical output autoformer?
  73. Good ECL84 / 6DX8 Tube - Correct Pentode Spice Model Needed!!!
  74. Assistance with 211 powerdrive type design
  75. Passive pre for kt88 push pull
  76. Current production tubes testing used/low out of the box?
  77. Safe to use bare (laquered) copper wire for heaters?
  78. 10W+10W EL34+ECC83 single-ended Class A Stereo amplifier Kit wlx
  79. Testing Volume Controls
  80. Rowe R-4359A Amplifier
  81. Converting pentode to triode
  82. Nuvistor heater current inrush question
  83. Stereo Pre-amp build issues
  84. Triode 843
  85. 12ax7 preamp tube for jolida 1501BRC
  86. Volume pot for tube preamp
  87. I finally won my fight to kill the hum, but not clear why
  88. HK A500 phono issues
  89. Parallel Damper Tubes for Voltage Doubler
  90. Good schematic (circuit) with tube 12ax7
  91. Potientiameter
  92. HH Scott 299C tube integrated amp channel B music comes on after 15 mins to 20 mins?
  93. transformer wiring
  94. Looking for help with my Emotive Audio ETA Amplifier
  95. Running tubes' filament on DC
  96. 6.3V Rectifiers and winding sharing?
  97. Audio colume controls / atternuators
  98. Determining output transformer turn ratio and impedance
  99. GM70 build startup
  100. Yukon Gold - a spud amp
  101. 310A (328A) triode curves
  102. Can anybody identify the manufacturer of this pcf80
  103. Need advice on Quad 22 repair
  104. 2P1P Russian tetrode
  105. Bogen MO-100 increase PS capacitor
  106. Does O-netics make SE OPTs?
  107. 1939 Rockola amp
  108. Yet another Aikido? NOVAL vs OCTAL
  109. Why are tube amp wattages low
  110. Vintage kt88 pp mod suggestions
  111. Balanced Bridge mode?
  112. Little Bear P5-1
  113. 10M45 power diss. w/ 6EM7 (12mA)
  114. Do we need this input resistor?
  115. Brimar thermionic products 2015
  116. 'Cheap' 2A3 P-P OPT
  117. Thoughts/?'s about gain stages and PI
  118. Remember the Ekco radios.
  119. Converting hybrid from ECC88 to 6N1P
  120. What is, --'Crosswalk'...?
  121. first time dyi help
  122. 500k potentiometer to 100k - okay?
  123. B&K 707 Chart for Russian Tubes
  124. rca transformer output
  125. Western Electric 300B tubes
  126. Interstage transformer crosswalk help
  127. DC coupled MOSFET drivers for output stage - simple questions
  128. 813 PP Audio Amp Help
  129. TX 2575
  130. HK Citation II Negative Feedback question... how can I measure it?
  131. a little help with the Aikido lV?
  132. Is it possible for a tube to not light up without any visual other indicators?
  133. Oversized OPTs
  134. How to calculate global NFB CAPACITOR. Is it needed?
  135. Simple driver for positive grid tubes
  136. Surplus for tubes in NY and Miami
  137. Lux CL-35 tone control simulation issue
  138. Stereo SE in Parallel?
  139. 6AR6: A new tube to play with
  140. Time for another dumb question
  141. CBS 12AU7?
  142. SE UL 6V6 GT
  143. RCA output transformer part # 246860
  144. 801A Battery Bias
  145. Acoustat Servo Amps
  146. how to connect output transformers??
  147. Tube Amp Power transformer getting Hot...dumb question
  148. Where to get tubes for DCPP build?
  149. Pro and Cons to use 4 ohm tap for Global Feedback instead of 8 ohm tap
  150. Any quality Chinese tube amps?
  151. 6V6 Single Ended question
  152. C. Follower w/- active load
  153. Bias adjustment in Stereo Power Amp with 4 x EL34
  154. All Tube MC Phono Head Amp
  155. Marantz 7 Tube pre-amplifier PCB Board Design
  156. Miller capacitance
  157. Regarding pin 1 & pin 8 EL34
  158. Better place for noise to put the Global Feedback resistor
  159. Change 12AY7 to 12AX7 Tube. Waht new settings?
  160. Bogen MO-100: Series and blown power transformer
  161. Tung Sol Reissue 6550 Ratings/ Reliability
  162. How do I calculate shunt resistor value in a heater series string
  163. Mikael Abdellah KT88 tweak
  164. 845 tube biasing strangly
  165. Which phono should I pick?
  166. Combination of Philips en Psvane tubes EL34
  167. 388A datasheet
  168. Build diary - Ciuffoli all triode OTL
  169. porta fi modification help please
  170. Help me ID 6SN7 GTB Baldwin
  171. Some help with output transformers induced hum
  172. Improved Mullard circuit
  173. Output Transformer Saturation, Impedance Load Curve...
  174. HK Citation II - strange issues
  175. Combination of PCB and point to point wiring a bad idea?
  176. Sound Valves M60 red plated badly please help?
  177. Old tube Radio Conversion
  178. I need something that will take place of a 5965
  179. Mu Follower Analysis
  180. Looking for advice on selling an expensive tube (WE 274A)
  181. 6EM7 SET Amplifier
  182. How to modify the Little Bear P8 preamp to become an amp?
  183. Differential Shunt Cascode Driver
  184. Where do I put the resistor?
  185. been laying low - revisiting a KT88 partial FB amp
  186. SET Rebuild (Fixed Bias and Rod Coleman DHT Regulators)
  187. ATTN Sy: Why gold grids 2
  188. "el escorpion" line stage, plus 10W B+ flyback supply & mute circuit
  189. Cathode Follower config for Tube DI
  190. Replacing capacitors in a VTL300 power amp
  191. how do I connect a plate amp for subwoofer to tube amp
  192. 6sn7 why the soft clipping.
  193. Yes we need Tone Controls! An outstanding project from 1962
  194. counterpoint sa4 otl
  195. Eico ST40 Kit
  196. Audio output transformer
  197. Thoughts on this schematic actually working.
  198. I am completely new to tubes.
  199. 2C50 Preamp Schematic
  200. Yet another RH84
  201. Example of Anode Follower (plate follower) with volume ctrl?
  202. Beginner DIY Amp
  203. EF86 Grid/anode triode question.
  204. Citation II... can't get enough bias!
  205. Auto Radio Tubes
  206. 4 edition valve amplifiers (in London)
  207. Need Help With Screen Switch
  208. Output transformer help
  209. High end car project- looking for advice
  210. Silicone tube rings
  211. Looking for grounded grid preamp schematic that use only 12ax7/420a
  212. Someone, please check my plot.
  213. Selecting output transformer for OTL headphone amp
  214. RCA tube preamplifier help
  215. Flickering knocking sound on a push pull EL34 configuration.
  216. Tubes headphone amplifier
  217. Custom tube amplifier builders
  218. New to valve cheap pre-amp tweak help please?
  219. ARC SP-3A-1 Tube Opinions
  220. Has anyone tried a "12AU7 to 6SN7 Adapter"?
  221. 300b filament on pb accumulator
  222. 2K2M Tubes...any use?
  223. GK-71 SE or PP?
  224. 6HV5 / CCS - driver project
  225. Getting 60W from 6C33C pushpull
  226. Phono Pre - Chassis layout
  227. RH84 and Electron stream question.
  228. 845 amp.. Now I've got a faint hum..
  229. "Lisa trafo" transformer builder
  230. KT-90 odd behavior
  231. ecc99-2a3
  232. 6SJ7 gain setup
  233. Prototype for 2X 20 Triode
  234. 6n1p preamp schematic
  235. PSU Choke - Valve Phono Pre project
  236. LND150 gyrator for ECC83/12AX7 ???
  237. GU-48 Tube amplifier 833A
  238. OTL with custom 64ohm speakers... Idea in the making
  239. Snap, Crackle, Pop!
  240. What normally causes buzzing?
  241. 690R:8R output transformer
  242. Redplate and Other Questions
  243. Tube wisdom...
  244. 01B thoriated tungsten filaments?
  245. Distortion/Low Signal/Noise from Ampex 620 after being on for 5 minutes?
  246. Max Plate (Boost + DC Supply), what does it mean
  247. It's been a while since I've been here...
  248. Quicksilver Silver Mono Mods
  249. Chinese, Single-Ended, Class A, Questions.
  250. Balanced Aikido Hum

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