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  1. Help Precision Fidelity M-7 amp
  2. And so it begins...
  3. What is the cream of the crop for DIY tubes kits?
  4. Amplifier Build - Suggestions
  5. 26DQ5 curves pin out
  6. Toroidal Transformer Upgrade for S5 Electronics K-16LS Kit
  7. VR tube RF issues
  8. usb and 3.5 to same pre
  9. Gain changing on 6n3 tube buffer
  10. Kelvin Capacitors
  11. simple question about on off switch
  12. Engineers Amp chassis
  13. First tube amp design, what are my mistakes?
  14. US 6L6GC identification
  15. PL508 triode curves, help !!!
  16. Multiple gain stages without continually increasing B+
  17. Choke and Capacitor input filters on a same winding?
  18. Any advice value for Volume control if....
  19. For tube lovers-Henry Wolcott Amplifiers from JBL PL100
  20. Help translate stamp mark on russian tube
  21. UK Engineers Amp (my first project)
  22. 12AX7 Heater pin 9
  23. Help With Translating Schematic
  24. Do diodes in the power section produce heat?
  25. you gotta laugh......really!!
  26. Dynachord Echocord S65 needs capacitors
  27. why is dc coupled better ?
  28. ARC grounding question
  29. Littles modifications of Triode Dick's KT88 MonoBill Classic
  30. New 6BG6G Amp
  31. Aesthetix Rhea Power Supply voltages
  32. Newbie - Broken Valve amp help!!
  33. New Build - Geraldine SE Amp
  34. Michaelson&Austin save attempt
  35. LTspice model needed....6JN6
  36. Big distortion of tube amplifier at high frequencies
  37. Radio Tubes Classifieds
  38. Sad and Lonely 6X4 Rectifier
  39. The Wild, Weird, World of GNF
  40. My first tube amp is here!!!
  41. Retro nixie volume indicator
  42. how to connect my corrent output DAC to my preamp TUBE?
  43. Roberts 770x / Akai M8 Tube Amplifier Question
  44. Conrad Johnson MV50 adjustment?
  45. Hum in console preamp after power supply rebuild
  46. Electrohome console amp?
  47. input impedance of mullard 3-3 amplifier....
  48. 6X4 Tube Rectifier Bridge
  49. can I use a zener for cathode bias
  50. Dual 5V winding 5AR4
  51. el84 test jig circuit
  52. anyone use knife switches for input selection???
  53. suggestions wanted for otl design
  54. Converting a single ended amp to parafeed
  55. Online stores for ordering Hitachi Metglas cores?
  56. Box of old tubes
  57. tube preamp
  58. bypassing balance control on VTL Deluxe
  59. Allegro II power amplifier
  60. ECF80 rating
  61. 71a pp parallel
  62. Hammond transformer 1627SEA
  63. Final schematic of my SET amplifier (drilling the chassis of my ex Boyuu china amp)
  64. Building Tube Amp DVD from Australia
  65. Tube preamp
  66. Bigger amp building help
  67. Balanced tube RIAA Preamplifier - Idea Search
  68. One tube brighter/hotter than the others
  69. HMV 2001 1953 record player circuit
  70. D3a - diode between screen & plate (triode) ?
  71. Radiotron/Eli Duttman phono change C1 to .00391?
  72. Mating Martin logan summits with VTL 125s has been a challenge
  73. Learning to Build A Tube Amplifier
  74. how to determine if an output transformer has blown?
  75. Secondary Emission Tetrode
  76. Monster Transformer Has Arrived
  77. wiring tubes in series
  78. Rogers E20a/Audio Note transformer
  79. PCL86 Amplifier
  80. Beard BB100 P35 project
  81. 6p15p
  82. help with paul hynes reg
  83. Aphex Tubessence 107 Mic Pre
  84. Vinyl Savor 6CB5A SE Amps?
  85. PSU RC filter vs. VR regulator tube
  86. VTL Deluxe tube mystery
  87. My First SPUD Amp, 6EM7
  88. GK-71 SE amp
  89. 12ax7 Phono Preamplifier
  90. Aikido 6GM8 (ECC86) HPA or How I built a tube amp with non-scary voltages
  91. "Langham" Phase Inverter Origin?
  92. Adding "tube sound" via inline circuit
  93. Radford STA25 Renaissance - HELP!
  94. Capacitor across B+ and the input signal on the primary of the output transformer
  95. Zenith KPS-80 Rebuild
  96. 50+ watt diy tube amp recommedations
  97. Trouble with PSUD 2 high current / low voltage
  98. Magnavox 175 clone w/Fisher OPTs?
  99. First post here, need some help with PSU for amplifier
  100. Novice build of 6EM7 circuit. PSU advice.
  101. All DHT single-ended 211 amp suggestion?
  102. Adding inputs to Melody SP3 mk2
  103. Repurpose vertical output autoformer?
  104. Power supply for tube preamp - Help!
  105. Good ECL84 / 6DX8 Tube - Correct Pentode Spice Model Needed!!!
  106. Assistance with 211 powerdrive type design
  107. Passive pre for kt88 push pull
  108. Current production tubes testing used/low out of the box?
  109. Safe to use bare (laquered) copper wire for heaters?
  110. power supply
  111. Power transformer question
  112. 10W+10W EL34+ECC83 single-ended Class A Stereo amplifier Kit wlx
  113. Testing Volume Controls
  114. Rowe R-4359A Amplifier
  115. Converting pentode to triode
  116. Nuvistor heater current inrush question
  117. Stereo Pre-amp build issues
  118. Triode 843
  119. 12ax7 preamp tube for jolida 1501BRC
  120. Volume pot for tube preamp
  121. I finally won my fight to kill the hum, but not clear why
  122. HK A500 phono issues
  123. Parallel Damper Tubes for Voltage Doubler
  124. Good schematic (circuit) with tube 12ax7
  125. Potientiameter
  126. HH Scott 299C tube integrated amp channel B music comes on after 15 mins to 20 mins?
  127. transformer wiring
  128. Looking for help with my Emotive Audio ETA Amplifier
  129. Running tubes' filament on DC
  130. 6.3V Rectifiers and winding sharing?
  131. Audio colume controls / atternuators
  132. Determining output transformer turn ratio and impedance
  133. GM70 build startup
  134. Yukon Gold - a spud amp
  135. 310A (328A) triode curves
  136. Can anybody identify the manufacturer of this pcf80
  137. Need advice on Quad 22 repair
  138. 2P1P Russian tetrode
  139. Bogen MO-100 increase PS capacitor
  140. Does O-netics make SE OPTs?
  141. 1939 Rockola amp
  142. Yet another Aikido? NOVAL vs OCTAL
  143. Why are tube amp wattages low
  144. Vintage kt88 pp mod suggestions
  145. Balanced Bridge mode?
  146. Little Bear P5-1
  147. 10M45 power diss. w/ 6EM7 (12mA)
  148. Hot chassis death traps
  149. Pwr Xfmr-less Tube Guitar Preamp
  150. Do we need this input resistor?
  151. Brimar thermionic products 2015
  152. 'Cheap' 2A3 P-P OPT
  153. Thoughts/?'s about gain stages and PI
  154. 300V & 12.6V regulated power supply.
  155. Remember the Ekco radios.
  156. Converting hybrid from ECC88 to 6N1P
  157. What is, --'Crosswalk'...?
  158. first time dyi help
  159. 500k potentiometer to 100k - okay?
  160. B&K 707 Chart for Russian Tubes
  161. rca transformer output
  162. Western Electric 300B tubes
  163. Interstage transformer crosswalk help
  164. DC coupled MOSFET drivers for output stage - simple questions
  165. 813 PP Audio Amp Help
  166. Bargain basement coupling caps
  167. TX 2575
  168. HK Citation II Negative Feedback question... how can I measure it?
  169. a little help with the aikido lv?
  170. Is it possible for a tube to not light up without any visual other indicators?
  171. Oversized OPTs
  172. How to calculate global NFB CAPACITOR. Is it needed?
  173. Simple driver for positive grid tubes
  174. Is this how to create a full wave rectifier?
  175. Surplus for tubes in NY and Miami
  176. Lux CL-35 tone control simulation issue
  177. Stereo SE in Parallel?
  178. 6AR6: A new tube to play with
  179. Time for another dumb question
  180. CBS 12AU7?
  181. SE UL 6V6 GT
  182. RCA output transformer part # 246860
  183. 801A Battery Bias
  184. Acoustat Servo Amps
  185. how to connect output transformers??
  186. Tube Amp Power transformer getting Hot...dumb question
  187. Where to get tubes for DCPP build?
  188. Pro and Cons to use 4 ohm tap for Global Feedback instead of 8 ohm tap
  189. Any quality Chinese tube amps?
  190. 6V6 Single Ended question
  191. C. Follower w/- active load
  192. Bias adjustment in Stereo Power Amp with 4 x EL34
  193. All Tube MC Phono Head Amp
  194. Marantz 7 Tube pre-amplifier PCB Board Design
  195. Miller capacitance
  196. Regarding pin 1 & pin 8 EL34
  197. Better place for noise to put the Global Feedback resistor
  198. Change 12AY7 to 12AX7 Tube. Waht new settings?
  199. Bogen MO-100: Series and blown power transformer
  200. Tung Sol Reissue 6550 Ratings/ Reliability
  201. How do I calculate shunt resistor value in a heater series string
  202. Mikael Abdellah KT88 tweak
  203. Replacing caps 50uf with 47UF
  204. Where can buy those earthing rods?
  205. 845 tube biasing strangly
  206. Which phono should I pick?
  207. Combination of Philips en Psvane tubes EL34
  208. 388A datasheet
  209. Build diary - Ciuffoli all triode OTL
  210. porta fi modification help please
  211. Help me ID 6SN7 GTB Baldwin
  212. Some help with output transformers induced hum
  213. VA rating needed for Single End Power Supply
  214. Improved Mullard circuit
  215. Evaluating Tube Diodes as Rectifiers
  216. Output Transformer Saturation, Impedance Load Curve...
  217. HK Citation II - strange issues
  218. Combination of PCB and point to point wiring a bad idea?
  219. Sound Valves M60 red plated badly please help?
  220. Old tube Radio Conversion
  221. I need something that will take place of a 5965
  222. Mu Follower Analysis
  223. Looking for advice on selling an expensive tube (WE 274A)
  224. 6EM7 SET Amplifier
  225. El84-6BQ5... NOT!!!! just a lookalike!
  226. How to modify the Little Bear P8 preamp to become an amp?
  227. Differential Shunt Cascode Driver
  228. GZ32 vs ss rectifier
  229. Where do I put the resistor?
  230. been laying low - revisiting a KT88 partial FB amp
  231. SET Rebuild (Fixed Bias and Rod Coleman DHT Regulators)
  232. ATTN Sy: Why gold grids 2
  233. "el escorpion" line stage, plus 10W B+ flyback supply & mute circuit
  234. Cathode Follower config for Tube DI
  235. Replacing capacitors in a VTL300 power amp
  236. how do I connect a plate amp for subwoofer to tube amp
  237. 6sn7 why the soft clipping.
  238. Yes we need Tone Controls! An outstanding project from 1962
  239. counterpoint sa4 otl
  240. Eico ST40 Kit
  241. Audio output transformer
  242. Thoughts on this schematic actually working.
  243. PSUD2 on Mac
  244. Two-section 500V electrolytic caps for cheap (new production)
  245. I am completely new to tubes.
  246. 2C50 Preamp Schematic
  247. Yet another RH84
  248. Example of Anode Follower (plate follower) with volume ctrl?
  249. Beginner DIY Amp
  250. EF86 Grid/anode triode question.

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