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Since the existing relay is usually only a double pole and both of those contacts are tied up carrying RF, you're stuck with needing another way to switch this bias. There have been many attempts over the years to skimp on the 3 pole relay by companies like Texas Star. They suffer the consequences of instability and blowing up the chokes used to isolate the RF from the DC.

[QUOTE="Shockwave, post: 438140, member: 10882"] Since the existing relay is usually only a double pole and both of those contacts are tied up carrying RF, you're stuck with needing another way to switch this bias. There have been many attempts over the years to skimp on the 3 pole relay by companies like Texas Star. They suffer the consequences of instability and blowing up the chokes used to isolate the RF from the DC. [/QUOTE]

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