[Elecraft] Re: K2/100 High Refl shutdown driving amp

[Wayne Burdick]

Hi Floyd,

We can correct this in the KPA100's MCU firmware. I'll revise the firmware and
send it to you within the next day or two for testing. We may make other
changes, eventually, but I'd like to quickly eliminate this issue for those
using amps with slow relays.

Do you have a spec for how long your amp's relays take to fully activate? (I.e.,
the time from the K2's 8R signal going low to the time when the amp is
presenting a stable SWR to the KPA100.)

73,
Wayne
N6KR


Floyd Sense, K8AC wrote:

> Over 6-8 hours of
> operation, I've had one situation occur three times now.  If I pause just a
> bit too long between characters on CW, the amplifier relay drops out and the
> problem occurs when the next character is sent.  The problem is a High
> Reflected power message, and complete loss of output power from the K2.  I
> suspect that the problem originates when the K2 output rises during the
> amplifier relay drop and reactivation, presenting the K2 with a momentary
> high SWR situation.