[Elecraft] KPA100: PA KEY OUT & Bouncing Relays

[John-Morrow]

----- Original Message -----
From: "Dominik Bugmann" <hb9czf@swiss-artg.ch>
>
> Might Anti-Diode and C to GND help or shall I even use a small relais?
> BTW: I will never use QSK with the TL-922. The relais are to noisy.
>
> 73 de Dominik, HB9CZF

The relays on a TL922 operate at 100V. Is the switching circuit in the
K2
able to switch this directly?
The relays are not only too noisy, they are too slow and the contacts
will
eventually fail because rf is being applied before they have completely
changed over. This is known as hot switching.
To prevent 'hot switching' a TL922 needs a sequencing circuit between it
and a modern rig or the relays should be changed to vacuum types.

73
John Morrow GI4KSH