Re: [Elecraft] RTTY via FSK-D
Is the duty cycle of the K3 so that it will handle 100 watts output safely in a cw or rtty contest? At home I use a amplifier with 40 watts of drive. But, I would like to be able to operate portable at the river with just the K3 in a cw or rtty contest if it can handle the continious duty on these modes. Roy - WK4Y __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
I don't know about most of you but with WL and MMTTY with the simple transistor keyer, I have to set FSK-pol to 0 in my K3. -- View this message in context: http://elecraft.365791.n2.nabble.com/RTTY-via-FSK-D-tp4672954p5245437.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
Is the duty cycle of the K3 so that it will handle 100 watts output safely in a cw or rtty contest? At home I use a amplifier with 40 watts of drive. But, I would like to be able to operate portable at the river with just the K3 in a cw or rtty contest if it can handle the continious duty on these modes. I have run both of mine flat-out at 100 watts in the NAQP RTTY contest, where amps are not allowed. There were no problems. The fan comes on at high speed, but PA temp stabilizes way below the high temp cutoff point. Dave Hachadorian, K6LL Big Bear Lake, CA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] RTTY via FSK-D
So I'm thinking about wiring up the FSK IN pin on the AUX connector to do RTTY TX properly. I'm curious of a few things before I take the time to make the cable. First off how do people usually drive this signal? I assume its usually taken off of a serial port... I've tried a few RTTY apps and I've gotten them all to work via AFSK and all seem to have their pros/cons. I have a feeling in the end that I'll probably most use MMTTY being that it has a very nice interface into N1MM (unless there is another application that has a nice interface into N1MM that I should be aware of). Finally my last question is that if this comes off of a UART how has the timing been for people? I remember a while back I used a UART to to CW keying in N1MM. I remember being embarrassed by the CW that was sent and I've since bought a K1EL WKUSB kit and put that together... Very happy with that little box. Would I have these same timing issues in this FSK_IN setup? If there was ever a stupid thing is trying to use Windows as an RTOS. ;) Anyway thoughts appreciated. ~Brett (KC7OTG) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
Comments interspersed. Dave Hachadorian, K6LL Yuma, AZ -- From: Brett Howard br...@livecomputers.com Sent: Thursday, March 04, 2010 1:11 AM To: elecraft@mailman.qth.net Subject: [Elecraft] RTTY via FSK-D So I'm thinking about wiring up the FSK IN pin on the AUX connector to do RTTY TX properly. I'm curious of a few things before I take the time to make the cable. First off how do people usually drive this signal? I assume its usually taken off of a serial port... Yes, circuit is shown here: http://www.aa5au.com/rttyinterface.html I've tried a few RTTY apps and I've gotten them all to work via AFSK and all seem to have their pros/cons. I have a feeling in the end that I'll probably most use MMTTY being that it has a very nice interface into N1MM (unless there is another application that has a nice interface into N1MM that I should be aware of). MMTTY is the way to go. Finally my last question is that if this comes off of a UART how has the timing been for people? The timing is solid. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
Comment on the FSK circuit. MMTTY used to send upside down in FSK and there was no way to change it via software. It is possible the circuit may have to be modified to invert the polarity. 73 de Brian/K3KO Dave Hachadorian wrote: Comments interspersed. Dave Hachadorian, K6LL Yuma, AZ -- From: Brett Howard br...@livecomputers.com Sent: Thursday, March 04, 2010 1:11 AM To: elecraft@mailman.qth.net Subject: [Elecraft] RTTY via FSK-D So I'm thinking about wiring up the FSK IN pin on the AUX connector to do RTTY TX properly. I'm curious of a few things before I take the time to make the cable. First off how do people usually drive this signal? I assume its usually taken off of a serial port... Yes, circuit is shown here: http://www.aa5au.com/rttyinterface.html I've tried a few RTTY apps and I've gotten them all to work via AFSK and all seem to have their pros/cons. I have a feeling in the end that I'll probably most use MMTTY being that it has a very nice interface into N1MM (unless there is another application that has a nice interface into N1MM that I should be aware of). MMTTY is the way to go. Finally my last question is that if this comes off of a UART how has the timing been for people? The timing is solid. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2721 - Release Date: 03/03/10 19:34:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
Brett, Regarding the timing problems you had with CW from a serial port: In this situation the timing is not done by the UART, it is done directly by the CPU toggling the control line (usually DTR) on and off, and is therefore subject to non-RTOS timing problems. If you are using a UART to do FSK on its standard TxD data output, the timing is controlled by the clock in the UART, so the timing issues that affect serial port CW do not affect FSK done in this way. In a sense, the UART for FSK is a logical equivalent to the Winkeyer chip for CW. However, this only applies if the UART is capable of doing 5-bit codes at 45.45 baud. The UARTs used in PC serial ports have this capability, but most USB-to-serial adapters do not. One giveaway is the maximum speed supported by the adapter; if it is greater than 230 kb/sec, then the minimum speed is too high for RTTY. Currently available single USB-to-serial adapters are too fast for RTTY, but some 4-port or 8-port USB adapters can handle the slower speed. There is an add-in for MMTTY called EXTFSK that is capable of doing 45.45 baud RTTY with any USB-to-serial adapter. EXTFSK can key any of the TxD, DTR or RTS signal lines on any serial port or serial adapter; in fact, it can even do FSK keying via a parallel port. The downside is that the timing is handled by the CPU, not by the UART. However, apparently EXTFSK uses the same sound card timer that is used for AFSK, so the timing of EXTFSK-sent FSK should be the same as the timing of sound card AFSK, no better and no worse. You do need a keying circuit between the serial port and the K3's FSK input. The same kind of one-transistor or opto-isolator circuit that is usually used for serial port CW or PTT will also work for FSK keying. 73, Rich VE3KI KC7OTG wrote: So I'm thinking about wiring up the FSK IN pin on the AUX connector to do RTTY TX properly. I'm curious of a few things before I take the time to make the cable. First off how do people usually drive this signal? I assume its usually taken off of a serial port... I've tried a few RTTY apps and I've gotten them all to work via AFSK and all seem to have their pros/cons. I have a feeling in the end that I'll probably most use MMTTY being that it has a very nice interface into N1MM (unless there is another application that has a nice interface into N1MM that I should be aware of). Finally my last question is that if this comes off of a UART how has the timing been for people? I remember a while back I used a UART to to CW keying in N1MM. I remember being embarrassed by the CW that was sent and I've since bought a K1EL WKUSB kit and put that together... Very happy with that little box. Would I have these same timing issues in this FSK_IN setup? If there was ever a stupid thing is trying to use Windows as an RTOS. ;) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
-- From: Brian Alsop als...@nc.rr.com Sent: Thursday, March 04, 2010 8:11 AM To: Dave Hachadorian k...@arrl.net Cc: Brett Howard br...@livecomputers.com; Elecraft Reflector elecraft@mailman.qth.net Subject: Re: [Elecraft] RTTY via FSK-D Comment on the FSK circuit. MMTTY used to send upside down in FSK and there was no way to change it via software. It is possible the circuit may have to be modified to invert the polarity. - I am using the simple npn transistor circuit. Keying polarity can be selected in the K3. My setting is K3/config/fsk pol = 1 Dave Hachadorian, K6LL Yuma, AZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
MMTTY used to send upside down in FSK and there was no way to change it via software. MMTTY does not send upside down. It generates a 1 (high) on the output of the UART for mark which is correct. Most interfaces use a simple NPN transistor which turns that 1 into a closed contact (again correct for the old 60 mA loop circuits). Unfortunately, many rigs expect the FSK input to be OPEN (or high due to their internal pull-up) for Mark. The user needs to read his transceiver manual and if it is normally mark open or mark High, select REV in the menu ... this applies to such a diverse group of transceivers as the FT-1000D, FT-1000MP, IC-706mkIIg, TS-870, etc. Again, MMTTY is not upside down ... it is the interface standards that are still rooted in the 60 mA current loop instead of the data communications world where Mark=1/Space=0. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Alsop Sent: Thursday, March 04, 2010 10:12 AM To: Dave Hachadorian Cc: Elecraft Reflector Subject: Re: [Elecraft] RTTY via FSK-D Comment on the FSK circuit. MMTTY used to send upside down in FSK and there was no way to change it via software. It is possible the circuit may have to be modified to invert the polarity. 73 de Brian/K3KO Dave Hachadorian wrote: Comments interspersed. Dave Hachadorian, K6LL Yuma, AZ -- From: Brett Howard br...@livecomputers.com Sent: Thursday, March 04, 2010 1:11 AM To: elecraft@mailman.qth.net Subject: [Elecraft] RTTY via FSK-D So I'm thinking about wiring up the FSK IN pin on the AUX connector to do RTTY TX properly. I'm curious of a few things before I take the time to make the cable. First off how do people usually drive this signal? I assume its usually taken off of a serial port... Yes, circuit is shown here: http://www.aa5au.com/rttyinterface.html I've tried a few RTTY apps and I've gotten them all to work via AFSK and all seem to have their pros/cons. I have a feeling in the end that I'll probably most use MMTTY being that it has a very nice interface into N1MM (unless there is another application that has a nice interface into N1MM that I should be aware of). MMTTY is the way to go. Finally my last question is that if this comes off of a UART how has the timing been for people? The timing is solid. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.733 / Virus Database: 271.1.1/2721 - Release Date: 03/03/10 19:34:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
I've never had occasion to use it and maybe I misunderstand what it is supposed to do, but it looks as if one can switch MMTTY transmit logic as follows: Open MMTTY Option Setup MMTTY TX Check or uncheck Invert Logic 73, Hank, W6SX Mammoth Lakes, California Elevation 8083 feet in John Muir's Range of Light __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
The Invert logic option in MMTTY only applies to PTT. The UART's FSK output cannot be inverted. If you are using EXTFSK, there is an option to invert the FSK logic in EXTFSK. This is immaterial with a K3, though; all you have to do is adjust CONFIG:FSK POL (set it = 1 for normal polarity). 73, Rich VE3KI W6SX wrote: I've never had occasion to use it and maybe I misunderstand what it is supposed to do, but it looks as if one can switch MMTTY transmit logic as follows: Open MMTTY Option Setup MMTTY TX Check or uncheck Invert Logic __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] RTTY via FSK-D
First off how do people usually drive this signal? I assume its usually taken off of a serial port... I've tried a few RTTY apps and I've gotten them all to work via AFSK and all seem to have their pros/cons. The most common way, and compatible with most loggers and RTTY software, is to drive the K3 FSK and PTT lines on the AUX connecter from a serial COM port on the PC. All that's needed is a level shifter from the PC RS-232 to the K3 TTL. Use a 1-2Kohm base resistor and an NPN switching transistor in the FSK and PTT lines. A diagram of this (except for the K3 AUX connector pins which is in the K3 manual) can be found many places, including www.rttycontesting.com. I have a feeling in the end that I'll probably most use MMTTY being that it has a very nice interface into N1MM (unless there is another application that has a nice interface into N1MM that I should be aware of). In the recent RTTY Contesting Survey just completed, 75% of the respondents use MMTTY. Look no further. It is beautifully integrated with N1MM Logger. Finally my last question is that if this comes off of a UART how has the timing been for people? I remember a while back I used a UART to to CW keying in N1MM. I remember being embarrassed by the CW that was sent and I've since bought a K1EL WKUSB kit and put that together... Very happy with that little box. Would I have these same timing issues in this FSK_IN setup? If there was ever a stupid thing is trying to use Windows as an RTOS. ;) Timing is perfect. I've never heard of a problem, especially because of the UART in the PC. Ed - W0YK --- Ed Muns Muns Vineyard - www.munsvineyard.com FaceBook - www.facebook.com/munsvineyard __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
