Roger Marrotte wrote:
I guess as of now I'm out of luck if I want to use my amp with a K3. I
just checked the manual for my AL-811H and "The open frame relay in the
AL-811H takes approximately 15ms to switch states". My K3 is on order.
I hope there's a K3 firmware change made before I get my K3, that will
allow me to adjust the change over timing. I'm far from an expert with
amps. I have no idea what an average switch over time is for amps in
general. Ameritron sells a high speed switching option, the QSK-5,
that reduces the switching time to 1ms. It costs around $300.00. A K3
firmware change would sure be less expensive.
That firmware change is surely needed, but there is another inexpensive
way which often works - speed up that open-frame relay.
The circuit shown in the link below uses the existing relay supply rail,
and it will shorten the switching time of most relays by about one-half.
The same circuit will also convert many older amplifiers to a modern
standards +12V, low-current switch interface.
http://www.ifwtech.co.uk/g3sek/in-prac/best-of.htm#speedup
--
73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek
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