Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
Hi to all,
initially inspired by our resident ubergeek " Klem ", about a month ago, I persuaded my friend Rod Elliot of ESP to put together and publish a comprehensive discussion of the many complex issues with transformer coupled speaker loads as used in typical voice paging systems. Aka " Line Voltage PA " . The result of our combined efforts may well be THE definitive article available on the net or elsewhere on the methods, design goals and many unseen hazards inherent in such systems. The detailed discussion of the audio transformer saturation hazard ( and how to defeat it in practice) it is not something either Rod or myself have ever seen published elsewhere. http://sound.westhost.com/articles/line-amps.html Lotta words, read them all carefully..... ..... Phil |
#2
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
On 6/20/2012 8:05 AM, Phil Allison wrote:
The detailed discussion of the audio transformer saturation hazard ( and how to defeat it in practice) it is not something either Rod or myself have ever seen published elsewhere. Probably because it has so many errors? First of all it is 70.7 Volt, not 70 Volt, so all his calculations are crap. |
#3
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
"Michael A. Terrell" Probably because it has so many errors? First of all it is 70.7 Volt, not 70 Volt, so all his calculations are crap. ** Satan has a nice warm place ready and waiting for this psycho troll. |
#4
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
On Jun 20, 8:05*am, "Phil Allison" wrote:
The result of our combined efforts may well be *THE *definitive article available on the net or elsewhere I don't intend to read it Phil, but if you're involved, it's probably THE definitive load of **** on the web seen in the last couple of years. John |
#5
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
"John-Delusional Troll " I don't intend to read it Phil, ** Be all way over your pointy head anyhow. |
#6
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
On Jun 20, 10:03*pm, "Phil Allison" wrote:
"John-Delusional Troll " I don't intend to read it Phil, ** Be all way over your pointy head anyhow. Nice syntax... Did you do all your research on Wikipedia as usual Phil? John |
#7
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
Phil Allison wrote:
Hi to all, initially inspired by our resident ubergeek " Klem ", about a month ago, I persuaded my friend Rod Elliot of ESP to put together and publish a comprehensive discussion of the many complex issues with transformer coupled speaker loads as used in typical voice paging systems. Aka " Line Voltage PA " . The result of our combined efforts may well be THE definitive article available on the net or elsewhere on the methods, design goals and many unseen hazards inherent in such systems. The detailed discussion of the audio transformer saturation hazard ( and how to defeat it in practice) it is not something either Rod or myself have ever seen published elsewhere. http://sound.westhost.com/articles/line-amps.html Lotta words, read them all carefully..... ..... Phil The article was well written and answered a few questions I had about installing 70V (70.7V was referenced in the article early on) speaker systems. I've only done a few of these over the years and have been lucky to have reasonable sound coming out at the end of the job. Nice to know how to do it correctly, or at least good theory that can be argued with instead of opinions. Lets reduce the flames here, and consider the desired result (an increase in knowledge) and go from there, otherwise this group often sounds like a elementary school yard and, as I'm not 8 years old any more, I for one am not going to play along... John :-#)# -- (Please post followups or tech enquiries to the newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
#8
Posted to sci.electronics.repair
|
|||
|
|||
Line Voltage PA Primer
On 6/20/2012 8:34 PM, Phil Allison wrote:
"Michael A. Terrell" Probably because it has so many errors? First of all it is 70.7 Volt, not 70 Volt, so all his calculations are crap. ** Satan has a nice warm place ready and waiting for this psycho troll. It's amazing that everyone but you is a psycho troll, isn't it? |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
OT High voltage line | Home Repair | |||
Line Voltage Thermostats | Home Repair | |||
Voltage on analog CATV line | Home Repair | |||
MR16 - low voltage or line voltage | Home Repair | |||
Line voltage programmable thermostat? | Home Repair |