jea48
Responses from jea48
| Power questions I do have to tell you though that dedicated ccts do indeed often use separate neutrals Agree, a true dedicated circuit does not share a neutral with other circuits.. Therein a multiwire branch circuit. Multiwire branch circuits are not conside... | |
| Power questions 2012 Seminar w-Notes v1-0.ppt - indy-aes-2012-seminar-w-notes-v1-0.pdf Check out page 16. Read pages 31 through 37. . A true dedicated branch circuit does share a neutral with other circuits. (Therein a multiwire branch circuit.) A true dedicat... | |
| Can you touch the tubes? I avoid touching the print, lettering/numbers, info on old 1950s-1960s 9 pin signal tubes. The oil from fingers can smear the print on the glass. . | |
| 230V Preamp USA The best solution is to have electrician wire you 240 in your house and you will use best of the best. I doubt a credible licensed electrician will install a 240V branch circuit and 250V outlet to feed a 230V preamp. 2020 NEC 210.6 (A) (... | |
| Riddle me this.... This comes up when I try to send the edit You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Su... | |
| Riddle me this.... EDIT: Audiogon system would not let me edit just a few minutes after posting... A normal positive transient signal will cause a driver's speaker voice coil to push the cone forward. A negative signal transient will cause the voice coil to suck ... | |
| Riddle me this.... The term absolute phase just confuses the discussion. Signal Absolute Polarity is the terminology that should be used, imo... A normal positive transient signal will cause a driver's speaker voice coil to push the cone forward. A negative signal ... | |
| Riddle me this.... @antigrunge2 , Agree... Standouts where a definite difference could be heard? Etta James, "Love Songs". Track #1, "At Last". Change? Etta’s Voice. Polarity inverted her voice was thin. Correct polarity her voice was full, a more moving prese... | |
| Riddle me this.... Correct absolute polarity at speakers. Positive signal pushing speaker cone outward. Not negative inverted polarity sucking cone inward. :) https://www.youtube.com/watch?v=axXrs55X9kE | |
| Riddle me this.... @jeffseight I suggest you try it and listen for yourself. Here is some reading material for you: https://forum.audiogon.com/discussions/preamp-inverts-phase-question https://forum.audiogon.com/discussions/amp-inverted-or-non-inverted-phase h... | |
| Is this describing a blown tube, or two blow tubes? Tube testers are not very good for matching tubes, you may be able to weed out a shorted tube though. I’m not sure vintage tube testers were meant to match tubes. I doubt TV repair techs needed to match tubes as a rule. I have a Hickok 6... | |
| Is this describing a blown tube, or two blow tubes? @tonydennison Before installing new power power the bias pot(s) should be turned back (turn the bias pot(s) counterclockwise), so as to not over bias the new tubes. Not doing so can damage perfectly good new tubes. "Output tube bias should be s... | |
| Is this describing a blown tube, or two blow tubes? Last night there was a very loud POP and one of the tube went bright so I moved quickly and turned of the midmonos. The amps ran great this evening until just now, and another POP and bright tube, but it seemed like it was the other tube, but ... | |
| System Static Issue On average small signal tubes in ARC equipment lasts about 5000 + hrs. The static could be caused by dirty tube socket/tube pins contact. You might try pulling and reinserting each tube a few times one tube at time in each socket. Usually that wi... | |
| System Static Issue Tomorrow morning just turn on the Bedini Amp. Do not turn on the preamp for a while. Listen for the static noise. If you hear static it's not the preamp causing it. . |