I bought a couple of these (TT3G50) from DX Engineering. Unscrewed the gas
discharge plug, took a look and some photos of the inside construction, and sent
them back. Simply awful, (Alpha-Delta, not DX Engineering) BTW, the only
"protection" is a 1000V breakdown gas discharge tube with questionable contact
to the coax center conductor.
Wes N7WS
On 1/21/2018 5:12 PM, Paul Christensen wrote:
[snip]
High power Alpha-Delta arc-plug devices are located at the master ground bus
where all coaxial and control lines enter the station. Low power (200W)
Alpha-Delta devices are installed between the K3 and amplifiers. The Alpha-Delta
devices use field-replaceable arc-plugs. Like Polyphaser, these devices are
intended to mitigate lightning-induced charge, not necessarily antenna static
charge. Still, it's possible that one or more of the Alpha-Delta arc plugs has
failed, leaving the K3 vulnerable to static damage.
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