Ian -- The Tune-C on my SB-220 has a potential withstanding ability of
c. 3600v. For the Load-C it's about 1000v.
On Nov 11, 2004, at 7:03 AM, Ian White, G3SEK wrote:
R. Measures wrote:
when the input relay is closed but the output contacts are not. The
PA then has full drive but no load, which could lead to very high
voltages across the tank components.
Ian -- Would not the Load-C be likely to arc with no load?
Not in general. In the unloaded case, C1 and C2 of the pi-tank form a
capacitive divider across L. Since the capacitance of C2 is always
much higher than C1, the RF voltage across C2 will be lower.
...
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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