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View Full Version : Amp Technical Info

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  1. EL84's ma Draw Question.
  2. Mullard Re-issues
  3. NOS RCA/TRW Caps.. what're they made of?
  4. Transformer question
  5. Reference Books on Tube Amps
  6. Pick a 6L6GC for me......
  7. Sanding a cab.....
  8. Fuse for Marshall amp...
  9. Ampeg V4 Transformer failure
  10. Swapping Power Tubes W/out Bias
  11. Zwengel combo help please!
  12. Adding a pilot light (power light) to a amp running off of line power?
  13. Good Speaker Cab parts website
  14. Volume Box instructions
  15. I thought GT 6L6 GEs were supposed to be identical to GL6 GCs? WTF?
  16. Construction plans for a Marshall 4x12 Slant?
  17. Reverb tank installation?
  18. Newbie Tube Amp Standby Questions
  19. bias range for a pair of 5881's
  20. Help... Fender 6G15 reverb AKA is something wrong with my p. transformer???
  21. 4xEL84 with Fender AB763 preamp?
  22. '62 Bassman - Smoking Amp!
  23. 6CG7 interchangable with a 12au7?
  24. Bias range resistor question
  25. Speaker Cloth attachment?
  26. vox ac15 reverb tank replacement question
  27. Pulling Power Tubes to Reduce Level
  28. Is my speaker blown?
  29. New Blues Jr. woes, can you help? Fried
  30. Ever heard of NTE electrolytics?
  31. do bigger caps = quieter amp?
  32. Boogie Bias Mod - Help!
  33. 6v6 in place of El34s?
  34. How do you power down you amps?
  35. 50 watt Plexi OT with 100 watt iron?!?
  36. breakin in speakers
  37. Marshall Jubilee 2558 a little quiet
  38. Looking for DIY AMP info
  39. '64 Super Reverb blowing fuses?
  40. So why are 2x6L6 or 2xEL34 50 watts?
  41. 16ohm spkr in Deluxe Reverb?
  42. Removing the amp reverb unit (again)
  43. Front Loaded Vs Rear? Sonic differences?
  44. Tips for setting up Germino Club 40 for 6V6
  45. Headroom & EQ help, PLEASE!!!
  46. NOS Tubes
  47. Are dovetail joints in pine cabinets important?
  48. Who makes the highest gain EF86 preamp tubes Today?
  49. Anyone tried the Tungsol Reissue ECC803s gold pins??
  50. Wiring question
  51. Tube Tester owners....
  52. PT for P-P Class A low power?
  53. JMP 6550 - EL34 Conversion Worse.
  54. quick disconnect vs. soldering
  55. Are these the "desired" RCA 6V6GTs?
  56. NOS Tesla E83CC ?
  57. Help: Re-cap a Traynor YBA-2
  58. Demeter TGA-3 having Volume Fluctuations...
  59. Help dating a silverface Deluxe reverb
  60. Best solder for speakers?
  61. MOJO "Dijon" coupling caps
  62. One tube glowing brighter
  63. 5U4 vs 5AR4/GZ34
  64. Maximatcher vs/and Hickok 600A tube testing/NEW HOBBY??
  65. Old tubes off Ebay....
  66. Old Caps/Old Tubes-their respective noises
  67. Mullard XF-3's
  68. 5751's in a vox
  69. Some basic technical questions from a completely tube ignorant guy. Some help please.
  70. Help with an AC30 HW Combo
  71. NOS tubes info site?
  72. So, who's up for some troubleshooting?
  73. Supro Thunderbolt loudness issue
  74. Need piping for recover!!
  75. Old 12AX7 Tube ID
  76. eminence 15" anyone?
  77. Field coil spkr to non-field coil...?
  78. Mesa Boogie Lonestar Special
  79. Mesa Nomad head, big hum, help!
  80. why do people do this?
  81. Help! The rice-krispy guys are in my Rivera amp!
  82. Help me solve a Fender Deluxe mystery.
  83. Weak Tremolo on AA964 Princeton
  84. An vintage BFDR problem
  85. Bogner 101B Bias Setting
  86. Look what this guy did.
  87. Marshall footswitch question.
  88. Fender 5E5-B Schematic
  89. A question for the Techs
  90. Ohm question
  91. What to do with Tremolux?
  92. Different Caps/Resistors - Which ones?
  93. New amp build ideas - 8x 6CG7 output tubes
  94. Help me pick a preamp tube combination
  95. The all tube modeling amp -- pipe dream?
  96. More old tubes....
  97. Ampeg Reverberocket lost most of it's volume
  98. 16 ohm vs. 4 ohm sound difference in a Marshall cab?
  99. Tech in NC/SC ?
  100. Tube Burn-In
  101. How can I tell if my caps are discharged, and safe?
  102. EL84 Getter Flashing Black???
  103. Two Rock Sounds Dull....
  104. Isolation Transformers and Chassis Safety
  105. Jje34l Or Eh 6ca7 For Vanhalen 1 Sound
  106. princeton "vibrato"
  107. Peavy classic 30 info
  108. Adjusting catode follower and/or phase inverter for more gain ??
  109. Adjusting gain , Plate resistors vs. cathode resistors ?
  110. Tubes mounted on the PCB good or bad thing?
  111. Nasty hum in build
  112. Marshall 6L6-EL34 Mod-Easy?
  113. Latest old stock tube score....
  114. 12FQ8 the same as 12AX7?
  115. Using a 5y3 in a gz34 slot???
  116. DRRI with Hoffman board no tremolo
  117. TNT (The Neco Tube)??
  118. strange problem solved on my Deville
  119. Amp motorboating...
  120. 3 Spring vs. 2 Spring reverb
  121. Replacement Filter Caps for Marshall 1987X
  122. BFDR Vibrato tick tick tick....
  123. Power tube (screen?) resistors on BFDR, etc.
  124. BFDR Vibrato channel trebly?
  125. Mercury Magnetics 4ohm Bassman OT in a Super Reverb?
  126. Power attenuator for Super Reverb
  127. JCM602 Ground Loop w/Effects In the Input and Loop At the Same Time
  128. Adjusting bias (particularly Fender BF)
  129. Amp Book Recommendations
  130. PCB designer/manufacturer hanging out here?
  131. Advice on this old brown super
  132. Reverb "boings" too fast
  133. Measuring bias with only a multimeter
  134. Power and Preamp tube reccomendations...
  135. Problem with Victoria Tweed Champ
  136. Output Transformers & Power
  137. The REAL Primary Impedance for a SE-6v6?
  138. Pro Jr volume loss....
  139. Name that tube
  140. Four 6V6's = 50 watts?
  141. More on 6V6 bias: Fender Champ
  142. Power tube specs?
  143. AMP Tech in Bay/Marin Area of California
  144. 2 NOS Westinghouse England 12AX7
  145. Kudos to Todd Shock, Wakarusa Amplification
  146. Test measure of a bias probe?
  147. More NOS..."Scoba" labeled 12AT7's...
  148. More 'whodat tube' hi jinx (pics)
  149. Mullard Long Plate...is it REALLY worth it?
  150. Expert speaker help needed!
  151. Marshall Amp Repair Update
  152. How to determine plate-to-plate impedance from plate only???
  153. Four 6L6GC Tubes 35 40 40 35 -- Balanced?
  154. SJB Audio Preamp Mystery(John Phillips)??
  155. suitable replacement caps for an early b15?
  156. RTC labeled EF-86's
  157. Dickerson Amp problem
  158. Dealing with stripped cab panel screw
  159. Need schematics for a good SS F/X loop.
  160. Super Reverb Bias volatge -49 to -60V..???
  161. How do you actually screw down a reverb bag?
  162. Another "can you ID this tube"
  163. 6550's in a Fender Twin RI
  164. trem help in AB763 twin reverb
  165. Reverb problem on Cornford Hurricane
  166. NOS 12ax7 Score?
  167. AB763 Bandmaster vs. AB165 Bassman...How similar are the circuits?
  168. Cutting a cabinet opening for a 5E3 chassis
  169. Blackface Deluxe Reverb extension speaker question
  170. Speaker comparison question... will this work?
  171. Mullard Long Plate vs Non Long Plate 12AX7s?
  172. Can a novice safely re-bias a Vic 50212 (Tweed Twin)?
  173. Help with strange AC30 out-of-tuneness.
  174. Adding Tube Rectifier to Vibroking?
  175. anybody try re-tubing(pre) an FTR-37
  176. cab splitter
  177. Conversion Issue: Help/Advice/Opinions needed by the experts
  178. Do you need to bias an amp with 1 preamp and 1 power tube?
  179. schematic for Weber MASS?
  180. Speaker Efficiency of Fender Hot Rod Deluxe
  181. Rectifier tubes in my Masonette
  182. Variable Bright switch mod for Pro Reverb?
  183. Who would you have do a vintage Jensen recone?
  184. Where to get tolex adhesive
  185. Traynor YCV20WR reverb hum
  186. Quick question...EL34 make..
  187. Bandmaster Humming?
  188. Heat
  189. 8 ohm vs 16 ohm - Same Model Speaker - Tonal differences
  190. Help With AC-30CCX Problem
  191. EIA code 451?
  192. Blackface Proreverb Microphonic!
  193. Can't Bias up to spec with various tubes
  194. 6L6GE bias the same as 5881?
  195. best place to send amp for overhaul?
  196. Pro Jr. Makeover...
  197. Got Raytheons?
  198. Ultimate Attenuator Hookup Question
  199. Change transformer in Bandmaster?
  200. book review: "Fender Bassman 5F6-A"
  201. Yea! It is BACK....
  202. tweed deluxe build PT question
  203. Varitone guitar inductor specs needed
  204. Identify the 12AX7's please!
  205. '62 Fender Concert Help
  206. Philosophical Q on Tone Controls
  207. Can I run a 150 watt head through a 1x12?
  208. you may remember my Magnatone 260-A project
  209. Can you make an 8 ohm speaker into 16 ohms?
  210. Gurgling/static noises from my amp?
  211. '71 Fender princeton non-reverb (Again!)
  212. help needed - installing 80pf cap in my Valve Junior Head
  213. Power supply dropping resistors - tone changes?
  214. '94 Concert gain channel dead
  215. Mid pot in Fender 6G8 tone circut
  216. source for yellow astron caps?
  217. Is it possible to remove 3 tubes on a 100 watt to make it 25 watts?
  218. Speaker mismatch in SS amps
  219. Which caps to replace?
  220. Mesa 6CA7 = Sylvania?
  221. Is my orange label jbl speaker still good?
  222. Why does this amp sound good?
  223. JCM 800 2204 EL34 Bias Range?
  224. Do lower draw power tubes risk overload of caps?
  225. Power supply filtering
  226. Tube swap in BF Deluxe Reverb
  227. Bypassing zener with cap
  228. Howto shorten a pot shaft?
  229. headroom loss
  230. help for '61 Ampeg Reverberocket?
  231. Screen voltage higher than plate
  232. Buggy standby - Fuchs mod...
  233. Strange Marshall 1987x issue
  234. Sadness is breaking a long plate Mullard...
  235. Tube amp with no sound coming out :(
  236. Sylvania 12AX7 "dark horse"
  237. Do I have to rebias my old Magnatone 210(single 6V6) after a tube swap?
  238. Traynor Guitar mate reverb problem...
  239. Marshall 2061X issue (reprise).....
  240. Fender Super Twin
  241. Why is my Marshall low on output?
  242. Innovative Guitar Amps Circuits
  243. Need help matching ohms
  244. Changing speakers, draining caps
  245. Another 12AX7 identification....
  246. Finally got my hands on a smooth plate telefunken....
  247. Amp signal cutting in & out on clean channel
  248. ef 86 identifiaction
  249. Blonde Circuit Bassman Filter Cap Values?
  250. Fender Super Reverb RI biasing?