[TenTec] Actual TT219 250 Hz Bandwidth?

[Dr. Gerald N. Johnson, electrical engineer]

With the bandpass tuning used by Tentecs since at least the Corsair II,
you can narrow any filter by sliding the 6.3 over from the 9 MHz pass
band, so you can get anything you desire with the stock filters, down to
zero bandwidth... Might be that the skirts aren't as steep as the
dedicated narrow filter, but then the steeper the skirts the more likely
the filter will ring on lightning, and fast CW and digital signals.

Are you sure the Tentec specification isn't at the 3 dB down points?
That's a standard depth for bandwidth of a tuned circuit.

73, Jerry, K0CQ

-- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.