K3: Keying SB-200 addendum
Locked
 
|
>I'm just about to connect the KEY OUT to the SB-200 relay.
Tnx for your comments, guys. I'm at VP5W, and no Radio Shack on the island :-( I did bring a little relay interface, but the reed relay has given up the ghost. Fortunately, we have one op coming from Seattle next week, and he can bring a replacement. It is a borrowed SB-200, otherwise I would have installed a soft-key mod. Oh well.... Elecraft had better hurry with their KPA800! VE7XF _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
|
|
Ralph,
A reed relay is a fragile device and may not survive the transient current and voltage spikes present when switching the SB200 relay. Be sure to have your friend bring a relay robust enough to handle the load presented by the relay coil in the SB200. Don K7FJ > > Tnx for your comments, guys. > I'm at VP5W, and no Radio Shack on the island :-( > I did bring a little relay interface, but the reed relay has given up the > ghost. Fortunately, we have one op coming from Seattle next week, and he > can bring a replacement. > It is a borrowed SB-200, otherwise I would have installed a soft-key mod. > Oh well.... > Elecraft had better hurry with their KPA800! > > VE7XF > _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
|
|
In reply to this post by Ralph Parker
I am the parts delivery guy :-) there's a great one transistor one resistor circuit for doing this that I have used in the past. I'll bring some relays and back emf diodes too
Brian soon to be vp5/n9adg Sent from my iPhone On Nov 22, 2008, at 10:39 AM, "Don Ehrlich" <[hidden email]> wrote: Ralph, A reed relay is a fragile device and may not survive the transient current and voltage spikes present when switching the SB200 relay. Be sure to have your friend bring a relay robust enough to handle the load presented by the relay coil in the SB200. Don K7FJ Tnx for your comments, guys. I'm at VP5W, and no Radio Shack on the island :-( I did bring a little relay interface, but the reed relay has given up the ghost. Fortunately, we have one op coming from Seattle next week, and he can bring a replacement. It is a borrowed SB-200, otherwise I would have installed a soft-key mod. Oh well.... Elecraft had better hurry with their KPA800! VE7XF _______________________________________________ Elecraft mailing list Post to: [hidden email] 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: [hidden email] 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 |
|
|
Brian ....
Better yet - If you can find a MFJ / Ameritron ARB-702 before you leave .... http://www.ameritron.com/Product.php?productid=ARB-702 We've used them with SB200 and FL2100 amps on a couple trips to FP and they are great and pretty much bullet proof. 73 es GL Hank K8DD ----- Original Message ----- From: "Brian Moran" <[hidden email]> To: "Don Ehrlich" <[hidden email]> Cc: <[hidden email]>; "Ralph Parker" <[hidden email]> Sent: Saturday, November 22, 2008 2:21 PM Subject: Re: [Elecraft] K3: Keying SB-200 addendum I am the parts delivery guy :-) there's a great one transistor one resistor circuit for doing this that I have used in the past. I'll bring some relays and back emf diodes too Brian soon to be vp5/n9adg Sent from my iPhone On Nov 22, 2008, at 10:39 AM, "Don Ehrlich" <[hidden email]> wrote: Ralph, A reed relay is a fragile device and may not survive the transient current and voltage spikes present when switching the SB200 relay. Be sure to have your friend bring a relay robust enough to handle the load presented by the relay coil in the SB200. Don K7FJ Tnx for your comments, guys. I'm at VP5W, and no Radio Shack on the island :-( I did bring a little relay interface, but the reed relay has given up the ghost. Fortunately, we have one op coming from Seattle next week, and he can bring a replacement. It is a borrowed SB-200, otherwise I would have installed a soft-key mod. Oh well.... Elecraft had better hurry with their KPA800! VE7XF _______________________________________________ Elecraft mailing list Post to: [hidden email] 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: [hidden email] 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: [hidden email] 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 |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |