+++++++++++++++++++++++++++++++++ Date: Wed, 09 May 2001 17:07:33 -0400 From: Charles Greene Subject: Re: [Elecraft] psk31 At 02:12 PM 5/9/2001 -0400, Dave Pomeroy wrote: >How are most of you guys hooking up for PSK31? I really don't want to unhook >my mike and headphones everytime I want to psk. Thanks in advance for the >info. I'm going in through the Mike connector and use the headphones jack. Rigblaster has a switch for mike/computer. I have a home made interface and don't have a problem with the mike because I've never used one on the K2. 73, Chas, W1CG +++++++++++++++++++++++++++++++++ Date: Wed, 9 May 2001 17:16:50 -0400 From: "KD2E" Subject: Re: [Elecraft] psk31 aux line in and aux line out. No switching of mics required. ....Dave - ----- Original Message ----- From: "Dave Pomeroy" To: Sent: Wednesday, May 09, 2001 2:12 PM Subject: [Elecraft] psk31 > How are most of you guys hooking up for PSK31? I really don't want to unhook > my mike and headphones everytime I want to psk. Thanks in advance for the > info. > -- Dave Pomeroy K8DNP SouthWestern Michigan ++++++++++++++++++++++++++++++++++++++ Date: Thu, 10 May 2001 07:24:29 +0100 From: David Pratt Subject: Re: [Elecraft] psk31 In a recent message, Dave Pomeroy said.... >How are most of you guys hooking up for PSK31? I really don't want to unhook >my mike and headphones everytime I want to psk. Thanks in advance for the >info. I had the same concern, Dave, that regularly changing the mic plug could put strain on the connector and its soldered fixing to the front PCB. I made a small box containing two 8-pin sockets and a 2-pole changeover switch, with a short flying lead to plug into the K2. I sprayed the box in Elecraft grey (UK spelling!). To be on the safe side, I threaded a few ferrite beads around some of the sensitive wires to ensure that RF was kept out. The box works a treat and provides a satisfactory method of switching from PSK31 or SSTV to telephony. 73 David G4DMP ++++++++++++++++++++++++++++++++++++++++++ Date: Wed, 30 May 2001 21:21:52 -0400 From: "Bob Lewis \(AA4PB\)" Subject: Re: [Elecraft] K2 PSK31 using VOX ? My experience has been that the K2 VOX will *not* work with PSK31. By the time you feed enough audio level to the K2 to reliably key the vox you will be driving the transmitter into ALC action and have too much IMD. A simple NPN transistor circuit will key the K2 just fine. I built one into the shell of the 9-pin "D" connector that connects to the computer serial port. I use a simple resistive pad to set Tx and Rx audio levels for my lap top - no transformers and no isolation required. You may or may not get away with that, depending upon the grounding scheme, power supply, computer, etc. ++++++++++++++++++++++++++++++++++++