[Drakelist] PSK31 B-Line Twins
Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Hi Bill: I started out w/PSK running w/a typical transformer isolated interface box and connected to the twins right thru the mic input and headphone outlet. It is imprtant to watch the drive levels and it was nec to put a resistive divider in the mic in line from the interface so the mic would not be overdriven. PSK requires very little power so I would do a normal load and tune-up then just reduce the drive level to get about 25 w out. Use the 4.8 or 2.4kHz bandwidth settings on the rx. Later, I used the spare hole locations on the twins to ad rcar ins and outs for the audio. Depending on the interface, VOX can work for the tr switching but I always prefered to use the PTT line in at the mic connector. This also can be paralleled of to the rear panel if desired. In the interface, I used a normal opto isolator output as the swich with no issues into the 4 line. It is important to be careful about the isolation with the interface. DONT just wire the ins and outs from the twins to the PC sound card. I used some cheap miniature interstage transformers that were about 4:1 and an opto isolator for the PTT line. I use the same interface box for RTTY, PSK, all my WSJT modes on HF as well as VHF. Mine has a small speaker in it that I can turn on or off, and a couple of divider switches so I can essentially run into line or mic level on the PC (some laptops dont have a line level input). I doesn't take a high capability sound card either. I was using an old soundblaster 16 card for a long time in a 486 machine running Win95. Worked just fine. eMail if you need any more info or want links to the basic interface circuits, etc. Curt KU8L Bill Ellis wrote: Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
I use the KB8XI interface that can be found at http://www.qsl.net/wm2u/interface.html (down the page) on my C-Line. It works for PSK but I use it mostly for RTTY AFSK and Hellschreiber. 73, Bob WW3QB --- On Fri, 9/17/10, Bill Ellis wb9...@yahoo.com wrote: From: Bill Ellis wb9...@yahoo.com Subject: [Drakelist] PSK31 B-Line Twins To: Drakelist Post drakelist@zerobeat.net Date: Friday, September 17, 2010, 1:57 AM Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC -Inline Attachment Follows- ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Although you'll copy far more station if it is high quality/low noise, at least on the Rx side. On 17-Sep-10 13:19, Curt Nixon wrote: I doesn't take a high capability sound card either. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Hi Bill - Well, not much All you have to do is put receiver audio into the PC sound card, and sound card output into the transmitter MIC. You CAN plug the SPKR output from the R-4B into the LINE IN or MIC input on the computer with the appropriate adapters, and plug the LINE OUT or SPKR OUT of the computer into the MIC connector of the T-4XB, again with the appropriate adapters. You then have to adjust the various levels, R-4B AF GAIN, the input level for the PC, the output level for the PC and the GAIN control on the T-4XB so that nothing is overdriven. IF you use the MIC input on either unit, you may need a resistive divider to drop the input level enough to prevent overdriving. OR, you can purchase one of the following hardware interconnect devices. Some provide transformer isolation, adjustable levels, cables, etc. and come complete with directions for installation. RigExpert http://www.rigexpert.com/ Rigblaster http://www.westmountainradio.com/RIGblaster.htm Tigertronics SignaLink http://www.tigertronics.com/ Buxcom Rascal http://www.packetradio.com/ All that being said, you will probably find that the B-Line is marginally acceptable for frequency stability with PSK31. The PSK31 signal is only 31 Hz wide, so there doesn't have to be much drift to lose the signal completely. I DID operate PSK31 with a B-Line back when PSK31 was new, and after they were on for an hour or so were stable enough for reasonable QSO lengths. They are NOT stable enough for 20 minute QSOs unless you keep one hand on the dial! You may be much more satisfied with one of the several PSK31 dedicated transceivers that are pretty inexpensive. You only need a very few watts, (2-5W,) so not an expensive proposition. Some are in kit form which is another bonus! One very nice solution is the PSK Series transceivers by Small Wonder Labs http://www.smallwonderlabs.com/ . These have the interface mentioned above included in the transceiver. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Bill Ellis wrote: Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Hi Nigel: I know that is technically and intuitively correct but I never saw a lick of difference in ANY digi mode I have run between the old SB and the new 24bit/192Khz cards I have. I have tried several different audio interfaces ( I do commercial digital recording of everything from full symphony to small groups). Only when I use the card for the SDR set up do I see any actual operation difference. In PSK, any station I could see as a trace would decode. Not disagreeing at all with the argument for low noise cards but my practical experience with the SB cards has been very good. I suspect that, especially with the Phase modulated modes like PSK, there are some issues with phase coherence and phase linearity thru the system that could affect decoding. Maybe I got lucky with my two old cards. Curt KU8L Nigel Gunn G8IFF/W8IFF wrote: Although you'll copy far more station if it is high quality/low noise, at least on the Rx side. On 17-Sep-10 13:19, Curt Nixon wrote: I doesn't take a high capability sound card either. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
While you can do the interconnect directly, if you choose to do it without isolation, you face two potentially big issues. 1. ground loop induced noise in tx and rx. This can render the system non-decodable in tx and no decodes in rx. 2. Potential for destrying the PC card and or Keying port if you use hard keying. Will it work? Probably. But it's like tempting fate with no isolation. JMHO Curt Garey Barrell wrote: Hi Bill - Well, not much All you have to do is put receiver audio into the PC sound card, and sound card output into the transmitter MIC. You CAN plug the SPKR output from the R-4B into the LINE IN or MIC input on the computer with the appropriate adapters, and plug the LINE OUT or SPKR OUT of the computer into the MIC connector of the T-4XB, again with the appropriate adapters. You then have to adjust the various levels, R-4B AF GAIN, the input level for the PC, the output level for the PC and the GAIN control on the T-4XB so that nothing is overdriven. IF you use the MIC input on either unit, you may need a resistive divider to drop the input level enough to prevent overdriving. OR, you can purchase one of the following hardware interconnect devices. Some provide transformer isolation, adjustable levels, cables, etc. and come complete with directions for installation. RigExpert http://www.rigexpert.com/ Rigblaster http://www.westmountainradio.com/RIGblaster.htm Tigertronics SignaLink http://www.tigertronics.com/ Buxcom Rascal http://www.packetradio.com/ All that being said, you will probably find that the B-Line is marginally acceptable for frequency stability with PSK31. The PSK31 signal is only 31 Hz wide, so there doesn't have to be much drift to lose the signal completely. I DID operate PSK31 with a B-Line back when PSK31 was new, and after they were on for an hour or so were stable enough for reasonable QSO lengths. They are NOT stable enough for 20 minute QSOs unless you keep one hand on the dial! You may be much more satisfied with one of the several PSK31 dedicated transceivers that are pretty inexpensive. You only need a very few watts, (2-5W,) so not an expensive proposition. Some are in kit form which is another bonus! One very nice solution is the PSK Series transceivers by Small Wonder Labs http://www.smallwonderlabs.com/ . These have the interface mentioned above included in the transceiver. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Bill Ellis wrote: Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
And, oh by the way, a direct connection allows any other computer sounds (you've got mail, boing, etc. etc.) that are played while you're transmitting to go right along with your audio tones. The best way to prevent that is to use a dedicated interface with a built-in sound card that precludes that situation from occurring. There is another company that sells interface boxes, microHAM: http://www.microham.com/ Dino KL0S On 17Sep2010, at 9:58 AM, Curt Nixon wrote: While you can do the interconnect directly, if you choose to do it without isolation, you face two potentially big issues. 1. ground loop induced noise in tx and rx. This can render the system non-decodable in tx and no decodes in rx. 2. Potential for destrying the PC card and or Keying port if you use hard keying. Will it work? Probably. But it's like tempting fate with no isolation. JMHO Curt Garey Barrell wrote: Hi Bill - Well, not much All you have to do is put receiver audio into the PC sound card, and sound card output into the transmitter MIC. You CAN plug the SPKR output from the R-4B into the LINE IN or MIC input on the computer with the appropriate adapters, and plug the LINE OUT or SPKR OUT of the computer into the MIC connector of the T-4XB, again with the appropriate adapters. You then have to adjust the various levels, R-4B AF GAIN, the input level for the PC, the output level for the PC and the GAIN control on the T-4XB so that nothing is overdriven. IF you use the MIC input on either unit, you may need a resistive divider to drop the input level enough to prevent overdriving. OR, you can purchase one of the following hardware interconnect devices. Some provide transformer isolation, adjustable levels, cables, etc. and come complete with directions for installation. RigExpert http://www.rigexpert.com/ Rigblaster http://www.westmountainradio.com/RIGblaster.htm Tigertronics SignaLink http://www.tigertronics.com/ Buxcom Rascal http://www.packetradio.com/ All that being said, you will probably find that the B-Line is marginally acceptable for frequency stability with PSK31. The PSK31 signal is only 31 Hz wide, so there doesn't have to be much drift to lose the signal completely. I DID operate PSK31 with a B-Line back when PSK31 was new, and after they were on for an hour or so were stable enough for reasonable QSO lengths. They are NOT stable enough for 20 minute QSOs unless you keep one hand on the dial! You may be much more satisfied with one of the several PSK31 dedicated transceivers that are pretty inexpensive. You only need a very few watts, (2-5W,) so not an expensive proposition. Some are in kit form which is another bonus! One very nice solution is the PSK Series transceivers by Small Wonder Labs http://www.smallwonderlabs.com/ . These have the interface mentioned above included in the transceiver. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Bill Ellis wrote: Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Curt - You are correct. That is why I said he COULD do that. I did it years ago when PSK31 was 'new', I saw something on it somewhere, found some software, and was on the air in about 15 minutes. :-) I used it for about three months, and lost interest. I guess my ADD keeps popping up, as I have to try everything, but once it becomes a 'plug and play' product I lose interest. I've been from RTTY / autostart, to slow scan TV with the old P7 phosphor monitor, packet, PSK31, weak signal VHF/UHF, moonbounce, etc., etc., etc. All are fun and interesting for a while, but I guess my ADD kicks in and I'm off to the next thing. :-) I used VOX, so minimal chance for PC damage. So, agreed, not the ideal arrangement, but sufficient to give it a shot! 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Curt Nixon wrote: While you can do the interconnect directly, if you choose to do it without isolation, you face two potentially big issues. 1. ground loop induced noise in tx and rx. This can render the system non-decodable in tx and no decodes in rx. 2. Potential for destrying the PC card and or Keying port if you use hard keying. Will it work? Probably. But it's like tempting fate with no isolation. JMHO Curt Garey Barrell wrote: Hi Bill - Well, not much All you have to do is put receiver audio into the PC sound card, and sound card output into the transmitter MIC. You CAN plug the SPKR output from the R-4B into the LINE IN or MIC input on the computer with the appropriate adapters, and plug the LINE OUT or SPKR OUT of the computer into the MIC connector of the T-4XB, again with the appropriate adapters. You then have to adjust the various levels, R-4B AF GAIN, the input level for the PC, the output level for the PC and the GAIN control on the T-4XB so that nothing is overdriven. IF you use the MIC input on either unit, you may need a resistive divider to drop the input level enough to prevent overdriving. OR, you can purchase one of the following hardware interconnect devices. Some provide transformer isolation, adjustable levels, cables, etc. and come complete with directions for installation. RigExpert http://www.rigexpert.com/ Rigblaster http://www.westmountainradio.com/RIGblaster.htm Tigertronics SignaLink http://www.tigertronics.com/ Buxcom Rascal http://www.packetradio.com/ All that being said, you will probably find that the B-Line is marginally acceptable for frequency stability with PSK31. The PSK31 signal is only 31 Hz wide, so there doesn't have to be much drift to lose the signal completely. I DID operate PSK31 with a B-Line back when PSK31 was new, and after they were on for an hour or so were stable enough for reasonable QSO lengths. They are NOT stable enough for 20 minute QSOs unless you keep one hand on the dial! You may be much more satisfied with one of the several PSK31 dedicated transceivers that are pretty inexpensive. You only need a very few watts, (2-5W,) so not an expensive proposition. Some are in kit form which is another bonus! One very nice solution is the PSK Series transceivers by Small Wonder Labs http://www.smallwonderlabs.com/ . These have the interface mentioned above included in the transceiver. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Bill Ellis wrote: Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Hi Curt. The biggest difference is in the location rather than design of the card. That inside a desktop or laptop PC tends to pick up significantly more noise fron the other circuitry than an external USB card. Ensure that you turn off the Windows burps and farts and other sound effects or they will be transmitted along with your wanted signal. This from the Ham Radio Deluxe Interfaces Manual by Simon Brown and Peter Halpin. ( http://www.ham-radio-deluxe.com/Portals/1/Documentation/Interfaces.pdf ) And one last tip: the onboard soundcards supplied with many computers are very basic indeed. Many people report seeing ghost signals on their waterfalls: these are very often caused by below-par soundcards. If you can install a good one - I use a Creative Audigy 2 - you will be pleasantly surprised at how 'clean' the waterfall looks. An added bonus is that you will be able to decode weaker signals too! Adding a second soundcard to any system can be recommended: but please make sure it's a good one. On 17-Sep-10 13:51, Curt Nixon wrote: Hi Nigel: I know that is technically and intuitively correct but I never saw a lick of difference in ANY digi mode I have run between the old SB and the new 24bit/192Khz cards I have. I have tried several different audio interfaces ( I do commercial digital recording of everything from full symphony to small groups). Only when I use the card for the SDR set up do I see any actual operation difference. In PSK, any station I could see as a trace would decode. Not disagreeing at all with the argument for low noise cards but my practical experience with the SB cards has been very good. I suspect that, especially with the Phase modulated modes like PSK, there are some issues with phase coherence and phase linearity thru the system that could affect decoding. Maybe I got lucky with my two old cards. Curt KU8L Nigel Gunn G8IFF/W8IFF wrote: Although you'll copy far more station if it is high quality/low noise, at least on the Rx side. On 17-Sep-10 13:19, Curt Nixon wrote: I doesn't take a high capability sound card either. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3139 - Release Date: 09/16/10 18:34:00 -- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN, EAA382. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Yes they do that Nigel: When I was in the Test and Measurement business for Tektronix, we used to laugh at the internal test instrumentation cards for PC's..that in-the-box environment is pretty noisey. I have used the on-board sound systems in laptops and on PC boards based on the AC77 s/w model..they work but indeed don't do a very good job. Again, my experience with the SB 16 card has been good tho..even with WSPR which is a truly weak signal mode with decodes from around the globe on milliwatts not uncommon. I also have used one of the Creative cards that Simon mentioned. It is at the upper end of the consumer or gamer realm. The semi-pro audio stuff like M/Audio Delta44's are MUCH better but it is a large price to pay for very small practical improvements in everyday operation. (JMO) The Creative Audigy series just places the mic preamps and I/o external..I suspect( not 100%) that the A/D are still on the internal part of the split system..so while it is more convenient, it isn't much quieter than the internal, non-split, version. Of course the USB-connected devices you mention are probably the best, noise wise..or at least they COULD be..because anytime you put a high speed digital com capability inside an audio box, the potential exists for noise problems. There are some very good comparison charts that have been made up by/for the SDR community that rate the noise floor and dynamic range of a variety of the better cards available. Last time I looked the Delta44 was pretty much the best widely available. Check the Softrock yahoo group files and links..pretty sure its there. Cheers, Curt Nigel Gunn G8IFF/W8IFF wrote: Hi Curt. The biggest difference is in the location rather than design of the card. That inside a desktop or laptop PC tends to pick up significantly more noise fron the other circuitry than an external USB card. Ensure that you turn off the Windows burps and farts and other sound effects or they will be transmitted along with your wanted signal. This from the Ham Radio Deluxe Interfaces Manual by Simon Brown and Peter Halpin. ( http://www.ham-radio-deluxe.com/Portals/1/Documentation/Interfaces.pdf ) And one last tip: the onboard soundcards supplied with many computers are very basic indeed. Many people report seeing ghost signals on their waterfalls: these are very often caused by below-par soundcards. If you can install a good one - I use a Creative Audigy 2 - you will be pleasantly surprised at how 'clean' the waterfall looks. An added bonus is that you will be able to decode weaker signals too! Adding a second soundcard to any system can be recommended: but please make sure it's a good one. On 17-Sep-10 13:51, Curt Nixon wrote: Hi Nigel: I know that is technically and intuitively correct but I never saw a lick of difference in ANY digi mode I have run between the old SB and the new 24bit/192Khz cards I have. I have tried several different audio interfaces ( I do commercial digital recording of everything from full symphony to small groups). Only when I use the card for the SDR set up do I see any actual operation difference. In PSK, any station I could see as a trace would decode. Not disagreeing at all with the argument for low noise cards but my practical experience with the SB cards has been very good. I suspect that, especially with the Phase modulated modes like PSK, there are some issues with phase coherence and phase linearity thru the system that could affect decoding. Maybe I got lucky with my two old cards. Curt KU8L Nigel Gunn G8IFF/W8IFF wrote: Although you'll copy far more station if it is high quality/low noise, at least on the Rx side. On 17-Sep-10 13:19, Curt Nixon wrote: I doesn't take a high capability sound card either. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3139 - Release Date: 09/16/10 18:34:00 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] PSK31 B-Line Twins
Dino: All you have to do is turn those sounds off in Windows Audio Control.. BTW..that interface cost more than either of my 4 line twins!! Also more than I have into BOTH PC's that I run in the shack. a $15.00 PC audio card and a 25.00 (maybe less if you have a good junk box) isolating interface is all that is really required. I'm sure its a nice pc of equipment but IMHO, it would be waay overkill for my system. Curt Dino Papas wrote: And, oh by the way, a direct connection allows any other computer sounds (you've got mail, boing, etc. etc.) that are played while you're transmitting to go right along with your audio tones. The best way to prevent that is to use a dedicated interface with a built-in sound card that precludes that situation from occurring. There is another company that sells interface boxes, microHAM: http://www.microham.com/ Dino KL0S On 17Sep2010, at 9:58 AM, Curt Nixon wrote: While you can do the interconnect directly, if you choose to do it without isolation, you face two potentially big issues. 1. ground loop induced noise in tx and rx. This can render the system non-decodable in tx and no decodes in rx. 2. Potential for destrying the PC card and or Keying port if you use hard keying. Will it work? Probably. But it's like tempting fate with no isolation. JMHO Curt Garey Barrell wrote: Hi Bill - Well, not much All you have to do is put receiver audio into the PC sound card, and sound card output into the transmitter MIC. You CAN plug the SPKR output from the R-4B into the LINE IN or MIC input on the computer with the appropriate adapters, and plug the LINE OUT or SPKR OUT of the computer into the MIC connector of the T-4XB, again with the appropriate adapters. You then have to adjust the various levels, R-4B AF GAIN, the input level for the PC, the output level for the PC and the GAIN control on the T-4XB so that nothing is overdriven. IF you use the MIC input on either unit, you may need a resistive divider to drop the input level enough to prevent overdriving. OR, you can purchase one of the following hardware interconnect devices. Some provide transformer isolation, adjustable levels, cables, etc. and come complete with directions for installation. RigExpert http://www.rigexpert.com/ Rigblaster http://www.westmountainradio.com/RIGblaster.htm Tigertronics SignaLink http://www.tigertronics.com/ Buxcom Rascal http://www.packetradio.com/ All that being said, you will probably find that the B-Line is marginally acceptable for frequency stability with PSK31. The PSK31 signal is only 31 Hz wide, so there doesn't have to be much drift to lose the signal completely. I DID operate PSK31 with a B-Line back when PSK31 was new, and after they were on for an hour or so were stable enough for reasonable QSO lengths. They are NOT stable enough for 20 minute QSOs unless you keep one hand on the dial! You may be much more satisfied with one of the several PSK31 dedicated transceivers that are pretty inexpensive. You only need a very few watts, (2-5W,) so not an expensive proposition. Some are in kit form which is another bonus! One very nice solution is the PSK Series transceivers by Small Wonder Labs http://www.smallwonderlabs.com/ . These have the interface mentioned above included in the transceiver. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Bill Ellis wrote: Hi all, I'm looking for a method to hook up a T-4XB R-4B for PSK31. What kind of circuitry would I need to build for this. Thanks, Bill, WB9CAC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
