jea48
Responses from jea48
| When does a 5V4G/GZ32 have to be replaced? I do have schematics of my amp. In particular, unlike the Dynaco, in my case 5V4G has its own secondary that is used just for its filament, so there is no high potential there.06-21-11: MeisterflohIf you look at the data sheet for the 5V4 you will... | |
| When does a 5V4G/GZ32 have to be replaced? Meisterfloh,Get it tested or just buy a new one....It would seem to me if the tube were to short you could burn out the 5 volt filament winding or possibly the high voltage winding of the power transformer. The tube is by far the cheaper of the tw... | |
| Surge Suppression vrs. Lighting and Power Spikes I would bet most residential earth grounding electrodes are inadequate when it comes to lightning protection.If memory serves me right the maximum electrode to earth resistance of 5 ohms per IEEE. http://www.cpccorp.com/deep.htmhttp://www.erico.co... | |
| Surge Suppression vrs. Lighting and Power Spikes Problem with grounding is that it has to be done (to be legal and insured) with at least gauge 10 wire to ground rod with bends of no smaller radius than 6".06-13-11: Kijanki Kijanki,You are correct on the size of the wire. #10 awg copper or #8 AW... | |
| Surge Suppression vrs. Lighting and Power Spikes Check out the video on lightning, a little down the page.>http://science.howstuffworks.com/nature/natural-disasters/lightning.htm. | |
| Hum issue - driving me more crazy Mribob, how come my bedroom sat system has no ground hum;More than likely the associated equipment is two wire cord and plug. Is that correct?I switched out my Meridian 861 processor for a Marantz 7005 processor;(no hum before with same sat box an... | |
| Hum issue - driving me more crazy ...I've checked and made sure the dish is grounded properly;05-31-11: MribobMribob,Properly.... Please explain.jim | |
| Hum issue - driving me more crazy Ozzy,I don't think the Iso-Max VRD-1FF will work on a SAT dishsystem. | |
| Hum issue - driving me more crazy "Bringing the IC to the right amp TO ABOVE the floor-> RESOLVES NOISE. In my unknowing frog brain, this implies something is inducing noise in the right sided IC (when under the floor - down about 12-16" is all though)."05-26-11: ImdocImdoc,*Ho... | |
| Hum issue - driving me more crazy But there is constant low level hum - right side only EVEN with preamp and XOVER turned off.I agree with Gs5556. Try some ground cheaters.Just because you turned off the preamp and xover that would not break the ground loop current path through th... | |
| How Much DC is OK on a Power Line? It is my understanding you cannot measure DC on the AC mains just by connecting your digital meter, set on DC voltage, across the mains.Not trying to start a flame buthttp://www.diyaudio.com/forums/solid-state/2080-dc-filter.htmlEva. | |
| My "ah-ha" moment with NOS tubes... You might want to try a Amperex USA made white label PQ 6922.Another great tube is early 60s Siemens CCa. | |
| Help with hum It is independent of volume control and completely stops when the preamp is disconnected.Just a guess but I would bet the ground loop is caused by one of the amps. When you have both amps connected to the preamp the ground loop circuit is complete... | |
| What exactly is a 20 amp dedicated line? .... is the NEC the National Electrical Code? Yes.Second, if a multi wire branch circuit is set up in the manner I described above, please explain how a multi pole branch circuit breaker works.The multi pole breaker has the function of controlling... | |
| What exactly is a 20 amp dedicated line? Bifwynne,Yes, it is called a multi wire branch circuit. (Two 120V separate circuits.) Not two dedicated circuits....Not so good for audio equipment that is connected together by ics though.In 2008 NEC required that multi wire branch circuits must ... |