Home |
Search |
Today's Posts |
|
#1
![]() |
|||
|
|||
![]()
On Thu, 04 Jan 2007 18:17:51 -0800, Frank Gilliland
wrote: +++No kidding. My favorite hobby has nothing to do with electronics; I +++rebuild & restore old Coleman lanterns. I would gladly trade any of +++the crusty old CB's from my pile for a crusty old Coleman lantern. ************** My favorite hobby is astronomy. There bigger is definitely better. james |
#2
![]() |
|||
|
|||
![]()
OOO crap did any one notice the class d amp WAS running off the 120V line
input NO Isolation to the Finel D amp section to the speakers, WOW SHOCKING. "james" wrote in message ... On Thu, 04 Jan 2007 18:17:51 -0800, Frank Gilliland wrote: +++No kidding. My favorite hobby has nothing to do with electronics; I +++rebuild & restore old Coleman lanterns. I would gladly trade any of +++the crusty old CB's from my pile for a crusty old Coleman lantern. ************** My favorite hobby is astronomy. There bigger is definitely better. james |
#3
![]() |
|||
|
|||
![]() "JSF" wrote in message . .. OOO crap did any one notice the class d amp WAS running off the 120V line input NO Isolation to the Finel D amp section to the speakers, WOW SHOCKING. "james" wrote in message ... On Thu, 04 Jan 2007 18:17:51 -0800, Frank Gilliland wrote: +++No kidding. My favorite hobby has nothing to do with electronics; I +++rebuild & restore old Coleman lanterns. I would gladly trade any of +++the crusty old CB's from my pile for a crusty old Coleman lantern. ************** My favorite hobby is astronomy. There bigger is definitely better. james Not to uncommon for a design that WILL work of of line voltage to not show a transformer even though it should have one. This may be in the verbal description of the AMP. Also any High Power amp may have a couple of hundred volts DC on the speaker terminals if there is componet failure. There should be circuitry to prevent this.whether it is line isolated or not. Typically the protection circuit CROWBARS the power supply blowing the fuse(s). Again it is not uncommon for something like this to not be included in the draft copy of an amp design. |
#4
![]() |
|||
|
|||
![]()
On Tue, 9 Jan 2007 09:20:30 -0500, "Jimmie D"
wrote in : "JSF" wrote in message ... OOO crap did any one notice the class d amp WAS running off the 120V line input NO Isolation to the Finel D amp section to the speakers, WOW SHOCKING. "james" wrote in message ... On Thu, 04 Jan 2007 18:17:51 -0800, Frank Gilliland wrote: +++No kidding. My favorite hobby has nothing to do with electronics; I +++rebuild & restore old Coleman lanterns. I would gladly trade any of +++the crusty old CB's from my pile for a crusty old Coleman lantern. ************** My favorite hobby is astronomy. There bigger is definitely better. james Not to uncommon for a design that WILL work of of line voltage to not show a transformer even though it should have one. This may be in the verbal description of the AMP. Also any High Power amp may have a couple of hundred volts DC on the speaker terminals if there is componet failure. There should be circuitry to prevent this.whether it is line isolated or not. Typically the protection circuit CROWBARS the power supply blowing the fuse(s). Again it is not uncommon for something like this to not be included in the draft copy of an amp design. You're right, and I think I remember saying that it was a prototype. The production version was a 2-channel unit that included a better front-end with clipping indicator, a triac power switch (easier on the power lines), a DC offset protection circuit (no crowbar), and thermal breakers on the sinks. It was conservatively rated at 1000 watts RMS continuous into 2 ohms in bridge mode. It could do 2000 watts but the filters would get too hot because of the low carrier frequency, which was the primary limitation of MOSFET technology at the time. Nowdays they make MOSFETs with rise times in the sub nS range which made this amp obsolete very quickly. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
AMERICA IN DANGER: Secret Torture Rooms | CB | |||
AMERICA IN DANGER: Secret Torture Rooms | Antenna | |||
The Problem of Mixing Religion and Science | Antenna | |||
Remember the Fugs + tomatoes | Shortwave | |||
K8CPA Email | CB |