>
>I've run out of ideas and could use some suggestions that may help to rescue
>this SB-220 of mine.
>
>I had a catastrophic failure a while back due to Zener diode shorting that
>set off a chain reaction on other components.
Chain reaction? . Shorting / unshorting my SB-220's Zener diode with a
clip lead did nothing except change the ZSAC by a hundred or so mA. One
explanation for the Zener failure can be found in "Circuit Improvements
for the Heath SB-220 Amplifier" in the Nov/Dec 1990 issues of *QST*.
- later, Walter
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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