Re: [Elecraft] CORRECTION Re: SB-221 for K3 need some help.
Oh - by the way - my Sb-221 bandswitch is in a shambles but I hard wired the amp for 20 meters until a new switch arrives. I learned a valuable lesson, bandswitches are delicate, close tolerance devices - don't ever try to repair one that is cracked - hi - but the contacts can be replaced if the wafer is good. Time was, I would never consider working on an amp - too intimidating. But after a couple K2's, soldering up those big anough to fit in your hands parts seemed to be a piece of cake!!! --- Don Rasmussen <[EMAIL PROTECTED]> wrote: > Thanks Bill, > > I don't *think* I received any special treatment > from > the factory, I just sent and email to the guy that > created the transceiver. Amazing. I got a response > in > less than an hour, a quote from an actual user of my > configuration. To those reading this, Elecraft will > spoil you for life, never think about buying > anything > other - hi. > > Yes, I turned off QSK and have a decent long delay > in > semi-break in. I had a QSO with NH6SV tonight and he > reports a clean signal st 599. > > I thought I had Tom cornered on no reason to install > that soft key but I like his answer. In addition, I > had the amp apart several times today and it > provided > me with a renewed respect for that little innocent > looking line. ;-) Beforte that comment he made, I > would not have bothered shutting off both units > before > connecting / disconnecting. Until or unless I > install > soft key, will maintain that procedure. > > .. > > > [Elecraft] CORRECTION Re: SB-221 for K3 need some > help. > Bill W5WVO w5wvo at cybermesa.net > Sun Aug 31 17:17:45 EDT 2008 > > Oops, correction. Looks like the K3 will handle the > SB-220's T-R relay coil voltage after all. Sorry > about > that, my bad. You still need to worry about the > closure timing, though. I have my K3 set to the max > (20 ms) and there doesn't SEEM to be a probelm -- > but > I've never actually measured how longs it takes the > original Heath frame relay to close. You really > should > do that. > > Bill W5WVO > > > ___ 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] CORRECTION Re: SB-221 for K3 need some help.
Thanks Bill, I don't *think* I received any special treatment from the factory, I just sent and email to the guy that created the transceiver. Amazing. I got a response in less than an hour, a quote from an actual user of my configuration. To those reading this, Elecraft will spoil you for life, never think about buying anything other - hi. Yes, I turned off QSK and have a decent long delay in semi-break in. I had a QSO with NH6SV tonight and he reports a clean signal st 599. I thought I had Tom cornered on no reason to install that soft key but I like his answer. In addition, I had the amp apart several times today and it provided me with a renewed respect for that little innocent looking line. ;-) Beforte that comment he made, I would not have bothered shutting off both units before connecting / disconnecting. Until or unless I install soft key, will maintain that procedure. .. [Elecraft] CORRECTION Re: SB-221 for K3 need some help. Bill W5WVO w5wvo at cybermesa.net Sun Aug 31 17:17:45 EDT 2008 Oops, correction. Looks like the K3 will handle the SB-220's T-R relay coil voltage after all. Sorry about that, my bad. You still need to worry about the closure timing, though. I have my K3 set to the max (20 ms) and there doesn't SEEM to be a probelm -- but I've never actually measured how longs it takes the original Heath frame relay to close. You really should do that. Bill W5WVO ___ 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
Re: [Elecraft] CORRECTION Re: SB-221 for K3 need some help.
Oops, correction. Looks like the K3 will handle the SB-220's T-R relay coil voltage after all. Sorry about that, my bad. You still need to worry about the closure timing, though. I have my K3 set to the max (20 ms) and there doesn't SEEM to be a probelm -- but I've never actually measured how longs it takes the original Heath frame relay to close. You really should do that. Bill W5WVO - Original Message - From: "Bill W5WVO" <[EMAIL PROTECTED]> To: "Dave G4AON" <[EMAIL PROTECTED]>; Sent: Sunday, August 31, 2008 3:10 PM Subject: Re: [Elecraft] Re: SB-221 for K3 need some help. > As far as the bandswitch is concerned, a good source for them are > the guys who do the 6-meter conversions for SB-220s and SB221s, > since they remove the whole bandswitch assembly. Check with Lou at > King Conversions ([EMAIL PROTECTED]). He may be able to help you > out. Lou does a great job with his 6-meter conversions, BTW. I'm > using one with my K3, but part of his conversion is installing a > solid-state buffer for the T-R line, which in the unmodified > SB-220 switches 120VDC. Do NOT connect an unmodified SB-220's T-R > switch line directly to the K3's T-R switch output jack. Your K3 > will NOT be happy. > > Bill W5WVO > > > - Original Message - > From: "Dave G4AON" <[EMAIL PROTECTED]> > To: > Sent: Saturday, August 30, 2008 11:50 PM > Subject: [Elecraft] Re: SB-221 for K3 need some help. > > > > Don, there isn't a diode across the relay coil in an SB220 - so > there > > may be a nasty back emf voltage on key release. Also, the K3 > maximum > > keying delay is 20 mS, will the relay in a SB220 switch in that > time? > > > > I don't want to dampen your enthusiasm, but old linears were > designed > > for relay contact switching and generally were slow on change > over... > > They can be modified, but in standard format may not work too > well. > > > > 73 Dave, G4AON > > K3/100 #80, Acom 1000 > > > > > > I found out this week that K3 is good with Heathkit > > SB-220 amps, all you need to do is connect a shielded > > RCA cable between the units - how easy is that? !!! > > ___ > > 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
