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echo: electronics
to: JASEN BETTS
from: BEN RITCHEY
date: 2002-12-24 18:20:24
subject: I/F

* An ongoing debate between Jasen Betts and Ben Ritchey rages on ...

 BR>> I have a Stereo Audio feed for 2 Watts {at} 8 Ohms (per channel)
 BR>> that I need to convert to "Line" level (I'm assuming this is
 BR>> I dismantled a very expensive TV to develop the Line-level
 BR>> outputs but could only work out speaker taps

 JB: > Whoa... if the TV didn't have external speaker terminals, be very
 JB: > careful, some TV sets operate with a live chassis
("ground" on the TV
 JB: > chassis could be a few hundered volts away from the mains Neutral)

Yup, I read 8 VAC (relative to Mains AC Ground) on common legs (lowest
resistance pair among L/R/+/- combos with power off) and 80 VAC on the Hot
legs. I fed them directly to better/larger external speakers and it sounds
great, but I want the EQ in the circuit  as it's still flat.

 JB: > If you still want to tap in you should install isolating
 JB: > transformers (with two 8 ohm windings) on the speaker lines. before
 JB: > your diverter (did you use something like a switched headphone
 JB: > socket)

I'll look into a couple of iso's ... I did bring out *both* sides of my tap in
case I wanted to restore the internal speakers. :)

Thanks for info ... & Merry Christmas

--
Keep the faith,

 : Ben        http://bellsouthpwp.net/c/m/cmech617/
 :         ICQ #32457590  AIM/Yahoo:benritchey  Jabber:cMech
 :
 + WildCat! Board 24/7  (337) 232-4155  33.6kBps 8,N,1  Free Software!

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