No lack of communication. :) Many people were asking for some amount of adjustability. Up to 20mS is what Wayne could do and get it out quickly. I believe he still plans to increase this but the code is going to be more involved. The item is still on the list.
------------------------- 73, Greg - AB7R Whidbey Island WA NA-065 On Fri May 9 0:18 , AD6XY - Mike sent: > >Some lack of communication between Greg and Wayne I expect regarding the >published figures. Luckily, this is a simple thing to fix one would hope. I >sent in a list of relay transit times on 2nd April. > >It was quite clear that 20mS was needed for the smaller coaxial relays like >the very commonly used CX540 and up to 50mS for the very high power relays >that you might use on a 1.5kW 6m amplifier. I was surprised to discover the >maximum delay was set to only 20mS as this is not enough; a margin is >needed. > >The CX540 is common and http://www.nts-electronic.com/cx540d.htm tells me it >takes 20mS to engage and 15mS to release. Tohotsu relays are very common. >The CX230, CZX3500, CX600, CX800, CX140 > and CX120 are often used in amateur applications (because they are cheap). >They also all specify 20mS. > >For really high power SSB electronics (Germany) do a specialist range of >relays. These specify 30mS for the HF400 series, 40mS for the HF500/1500 >series and 50mS for the HF4000 series. > > > > >wayne burdick wrote: >> >> George, >> >> Before settling on a max of 20 ms we looked at a number of amplifiers >> and got input from several "experts. If yours (or others) really need >> more than 20 ms, I can increase the delay with some additional work. >> >> Please contact me directly if you find out any more about your >> particular delay time requirements. >> >> tnx >> Wayne >> N6KR >> >> On May 8, 2008, at 5:53 PM, George wrote: >> >>> The FAQ for the K3 promised a 0-50 ms amp keying delay. We got only >>> 0-20 ms in the latest release. I don't think 20 ms is enough in my >>> case, based on my primitive research. Several "experts" have said >>> mine might need as much as 30-35 ms. My amp's relay is a 30 yr old >>> Potter & Brumfield open frame model with a 120vac coil. >> >> >> --- >> >> http://www.elecraft.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 >> >> > >-- >View this message in context: >http://www.nabble.com/K3-Variable-amp-keying-delay-% 3E%3Enot-long-enough%21%21---tp17139573p17142608.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 _______________________________________________ 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
