25 Comments for this entry

• 

  glmemory
  March 11th, 2010 on 10:18 pm

  Two points, but first of all, great video. TKS!

  First, the reason ALC is kicking in before “full power” is indicated is because of the difference between Peak and Average power. You are putting out full power just before ALC kicks in, even tho you don’t see it on the meter. Second, I use an audio pad between the computer and the rig which allows me to operate audio more toward the linear region of the sound card (and it gives me a wider range to fine tune the audio level). 73!
• 

  Polybun
  March 11th, 2010 on 11:02 pm

  Well, it will never fully go away. I mean, you had people doing this with rtty years ago, as well as sstv, although when you overdrove those modes, you knew it right away, especially sstv. Bob, all i got was static!

  What really causes this is people trying to get the last watt from their radio. Its digital folks, that last 10% isn’t going to matter.

  Most software, the tune tone should be used to tune, and nothing else, as the modes are programed in such a way to match that tune tone.
• 

  K7AGE
  March 11th, 2010 on 11:21 pm

  Thanks, the various different meters does confuse people, plus radios also react differently. I hope that most that view are able to get the audio set low enough so not to be wide across the band! Randy
• 

  Polybun
  March 12th, 2010 on 12:14 am

  Something that should be said. For psk, the “carriers” (the tone with no data transmit) is 80% duty cycle. So to stick with the ft817 here, 4watts is about what you would want to see with no data send. It will have its peaks at 5 watts. If you notice, if you note, at that point, his alc was still at one bar. Idealy, your digital station should never light the alc up ever! The difference here is that the alc is an peak meter, the watt meter is an averaging meter.
• 

  uploadJ
  March 12th, 2010 on 12:57 am

  Nice demo; It was a great idea using a second radio set to receive the transmitted signal to show how IMD (Inter-Modulation Distortion) W-I-D-E-N-S the transmitted spectrum thereby clobbering the adjacent signals!
• 

  K7AGE
  March 12th, 2010 on 1:06 am

  have fun!
• 

  yu7bh
  March 12th, 2010 on 1:16 am

  Dear Randy,
  Thank you for excellent video’s. All of them are very useful. After 30 years of cw operation I decide to buy MK2:-) With your help just in few day’s I did more than 50 qso’s with 30 watt’s on 7mhz, wow! No TVI, no angry faced neighbors!
  Nice fun with out QRO.

  YU7BH
• 

  leemer12
  March 12th, 2010 on 1:23 am

  that way it would be hard to mess up the audio settings in the mixer program just keep it full blast all the time. I also recommend getting a 2nd pci sound card so windows and webpages sounds don’t get transmitted out. That way you can jam to music while in QSO with your friend on psk .. Hope that helps as well , tnx for the vid 73 to all
• 

  leemer12
  March 12th, 2010 on 2:23 am

  I usually set mine up by the forward output and make that needle bounce as much as possible it will hit 100watts sometimes but, not all the time! when no text is going thru it should be at least 25% weaker than pep. bpsk31 is not 100% duty but, pretty close. in mixw there is a neat feature for audio levels called Amplitude level for this mode. set to 1.000, 1.000 is full output audio set to around maybe .3 to start and see if you can hit 100 watts. continued
• 

  leemer12
  March 12th, 2010 on 2:24 am

  yea that is one of the big myths out there about strong bpsk signals. no matter what power setting you are at you can have a dirty signal. Some things I seen out there that can cause some problems is ground loops, a sound card with high THD% , EMI from other equipment or AC lines, RFI from the actual transmitter getting into the audio lines or chassis. one thing I found on some rigs out there is that the ALC meter will read wrong somtimes.continued
• 

  longwave2007
  March 12th, 2010 on 2:36 am

  Enjoyed your psk31 videos a lot and have subscribed. 73’s
  de VE7GEJ
• 

  Brubru54
  March 12th, 2010 on 3:04 am

  Hi!K7AGE,

  Very helpful vidéo.Hope to copy you again in BPSK.

  73,F4DNP Bruno in France.
• 

  kb4ppp
  March 12th, 2010 on 3:42 am

  Hi Randy,
  Thanks for all the fine videos. They are very helpful.
  You are a fine example of what Amateur Radio was intended to be.
  I’m looking forward to many more videos in the furture.
  THANKS,
  Jerry KB4PPP Alexandria,KY
• 

  gullywinds
  March 12th, 2010 on 4:08 am

  thank you for paul vk5fpau
• 

  K7AGE
  March 12th, 2010 on 4:08 am

  You watch the power output and the ALC meter. I used a second radio to show you what happens with too much drive. Randy
• 

  tominabox1
  March 12th, 2010 on 4:59 am

  How do you check it if you dont have another tranceiver to listen on?
• 

  2M0JAS
  March 12th, 2010 on 5:31 am

  I’ve been following all your videos concerning PSK31. Very informative and a great guide for hams new to this digi mode.

  Keep up the great work Randy!

  73’s Stuart
  2M0JAS
• 

  vk7xgw
  March 12th, 2010 on 6:24 am

  Once again great work Randy, keep it up
  vk7xgw
  Wayne
• 

  W4HWB
  March 12th, 2010 on 6:45 am

  Very well done. Thanks and keep up the good work.
• 

  K5ADA
  March 12th, 2010 on 6:53 am

  Excellent. Thank you for these PSK31 videos Randy. 73, Arnold, K5ADA
• 

  m0sjd
  March 12th, 2010 on 7:48 am

  Another very helpful video Randy please keep up the good work when time allows,73, m0sjd steve.
• 

  Benoit37000
  March 12th, 2010 on 8:03 am

  HeLLo From France Randy
  Thanks for your gReat Video
  Very instructive
  Keep going One
  Benoit F4EYW
• 

  K5EXX
  March 12th, 2010 on 8:08 am

  Excellent video Randy, keep em coming and we will keep watching!

  Mark, K5EXX
  SE Texas
• 

  ki6esk
  March 12th, 2010 on 8:52 am

  Good Video Randy. 73,Curtis KI6ESK
• 

  yaesu1ad9z
  March 12th, 2010 on 9:51 am

  Good job Randy!
  73’s Dave
  AD9Z

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