This is a mots worrying post. I think it demonstrates considerable ignorance of the many and varied applications of the K3. There is so much more to life than HF.
How do you suggest we speed up a waveguide relay to 10mS? Fern Rivard wrote: > > Hi Ian and the group: > > I would suggest that you fix/modernize your old amplier and leave the > K3 as is! The problem is NOT with the K3 but rather your amplifier. > Upgrade the darn linear with more modern faster switching relays and > vacuum relays are not that expensive if you shop around for some good used > ones. > > 73 from Fern VE7GZ with a fine K3 transceiver > > > > > > > ----- Original Message ----- > From: "Ian White GM3SEK" <[EMAIL PROTECTED]> > To: <elecraft@mailman.qth.net> > Sent: Thursday, March 20, 2008 11:31 AM > Subject: Re: [Elecraft] K3 and linear amp > > > 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 > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.21.7/1331 - Release Date: 3/16/2008 > 10:34 AM > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://www.nabble.com/K3-and-linear-amp-tp16180386p16196103.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
