[Flexradio] Amp won't unkey

2006-10-05 Thread Dave Muskopf
Ok, got it, pin 8 is just a shunt diode. This clears things up. W8XO ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio

Re: [Flexradio] Amp won't unkey

2006-10-04 Thread Larry Taft
Dave, The pin 8 diode connection should go to the (+) side of the power supply which in your description is also the bottom of the ice cube coil. The top of the coil goes to pin 7. This puts a diode across the coil with its cathode to the (+) side and the anode to the (-) side of the coil wh

[Flexradio] Amp won't unkey

2006-10-04 Thread Dave Muskopf
This is confusing to me. My kw's big 112 volt ac clapper relay is keyed by an ice cube relay (12volt dc at apx 50ma.). The (+) lead from the 12 volt supply goes to the bottom of the ice cube relay coil. The (-) lead from the supply is grounded. I key the kw by shorting the top lead from the ice

Re: [Flexradio] Amp won't unkey

2006-10-04 Thread John Basilotto
Of Jeff Anderson Sent: Wednesday, October 04, 2006 6:38 AM To: Jeff Anderson; K6JEK; Flexradio Subject: Re: [Flexradio] Amp won't unkey For completeness I should have added: you should only need to use two pins: Pin 7 - connect to the Titan PTT connector center pin Pin 15 - connect

Re: [Flexradio] Amp won't unkey

2006-10-04 Thread Larry Taft
Jon, As Jeff said the pin 8 protection diode should not be needed for the Ten-Tec Titan amp because of its transistor keying. What is the other amp with the 12 volt DC relay? Does it have a back or protection diode across the relay coil inside the amp? If it doesn't have a back diode then yo

Re: [Flexradio] Amp won't unkey

2006-10-04 Thread Jeff Anderson
: Wednesday, October 04, 2006 3:32 AM To: K6JEK; Flexradio Subject: Re: [Flexradio] Amp won't unkey Hi Jon, I'm not familiar with the Ten-Tec Titan amp, but try disconnecting pin 8 from pin 7. Pin 8 is the cathode connection for the protection diode in the SDR's ULN2003 driver chip (a

Re: [Flexradio] Amp won't unkey

2006-10-04 Thread Jeff Anderson
's driver from inductive kickback. The ULN2003A's open-collector driver should work just fine just as it is. Let me know how it goes! - Jeff, K6JCA -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of K6JEK Sent: Tuesday, October 03, 2006 9:29 PM T

[Flexradio] Amp won't unkey

2006-10-03 Thread K6JEK
The Flex works fine with a Ten-Tec Titan but on a different amp it keys the amp but doesn't unkey. If I disconnect the keyline from the amp and plug it back in or power cycle the amp it unkeys. The Ten-Tec has transistor keying. This second amp has a 12V relay drawing 28 mA, keyed by groundin