[sdiy] VCS3 heat

[Tony Kalomiris]

Hi mark,

Glad to hear you've got a stereo VCS3 again.The hot spots are normal for 
this version of the A board.
Sounds like you got a very early design, before they moved Q110 to a heat 
sink and modified the circuit around that "hot" resistor (25 ohms 5 W).I 
wouldn't worry too much about it. Even though it's a poor design,as Magnus 
Danielson wonderfully described, it shouldn't create a problem.I owned and 
used one for many years with the charred pcb.

If you're still concerned just keep a smoke detector near by ;) j/k

Tony K





At 10:49 PM 6/29/2005 -0400, mark verbos wrote:

>Hi everybody,
>
>After 10 years of having only one side on my VCS3, I have found and 
>replaced the amplifier chip. The channel now works but I am worried by one 
>thing still. Should the power resistors at the top of that board be 
>getting so hot that they burn my hand when touched? The board shows 
>burning around the solder points. What would cause that? Is it normal? I 
>just don't want to be right back to a blown chip next week.
>
>Mark
>
>
>
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