> A band data connection allows the KAT500 to switch when you change
> bands on the K3, before you transmit. That saves a few hundred msec.
> So far, I've not seen the need for it.
A band data connection allows the KAT500 to switch *before* RF is
applied rather than hot switching *after* RF begins. I would be
very concerned about the service life of the relays when using RF
switching at high power - particularly in a "constant power mode"
like RTTY.
Most relays have significantly higher "carry" ratings than "switch"
ratings and will not survive repeated switching at full power.
While the KAT500 may be fast enough to switch during the "ramp up"
time at the start of a transmission, that is still pushing the
envelope - particularly if one is using it with a "legal limit
amplifier".
73,
... Joe, W4TV
On 10/10/2012 10:41 AM, Jim Brown wrote:
> On 10/10/2012 5:53 AM, Jim Miller wrote:
>> I notice the KAT500 has three antenna ports. Is it programmable to
>> auto-select the port from band data?
>
> Yes. And it doesn't even NEED band data -- like the KPA500, it
> auto-detects the transmiitted frequency, recalls settings for that
> frequency, and switches between antennas if it has been programmed to do
> so. I've been beta-testing one for about a month. The only connections
> between my K3, KPA500, and KAT500 are coax and PTT, and they work
> together flawlessly. When I do contesting, I use the K3 and KAT500 with
> my 30 year old Ten Tec Titan tube amp at legal limit power. Works fine
> that way too.
>
> A band data connection allows the KAT500 to switch when you change bands
> on the K3, before you transmit. That saves a few hundred msec. So far,
> I've not seen the need for it.
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
