[EMAIL PROTECTED] made an utterance to the drakelist gang ---------------------------------------------------------------------- Why not use a 2N3439 NPN rated at 450V or 2n5415 PNP rated at 200V and have the safety margin?
Larry K3VX -------------- Original message ---------------------- From: neil <[EMAIL PROTECTED]> > > neil <[EMAIL PROTECTED]> made an utterance to the drakelist gang > ---------------------------------------------------------------------- > Garey Barrell wrote: > > > > Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang > > ---------------------------------------------------------------------- > > Neil - > > > > I'm guessing that Dale's kit is using the 2N7000 as the output device. > > They are rated at 70 V Drain-Source, Minimum 60 VDC. Most Drake > > transmitters have between 55 - 65V on the key leads, so those 7000's are > > living dangerously! :-) I think the last ones I bought cost me around > > $0.06 each, so not a disaster if one does go. On the other hand, it > > takes so little current to key the transmitter that it might not blow > > the junction even if it did break down! > > Heh. Correct in one! I think the other keyer also uses a (single) > 2N7000. To be honest, I hadn't realized just how close to the limit I > was skating <g>. Now that I know, the Bad Thing will probably happen! > > 73 > > Neil > KX2Y > > ---------------------------------------------------------------------- > Submissions: [EMAIL PROTECTED] > Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body > Hopelessly Lost: [EMAIL PROTECTED] - help in body of message > Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net > ---------------------------------------------------------------------- ---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
