Messages

1

General discussion forum / Re: Software control side

« on: 2010-02-25, 00:53:15 »

Hi Mike (SM2O)

   Is there any news on a software terminal client. This would be very useful for club stations. Put it on your laptop and operate from anywhere with an internet connection. Hope this is soon possible.

73
   Tony VE3QF

2

General discussion forum / Re: Remoting the K3

« on: 2010-02-23, 19:44:55 »

Hi Mike,

   Thanks for your reply. I'm sorry, I guess I did not make myself clear. I was not proposing that you make the boxes or make any changes to the existing 1258 Mk2. Those who have already purchased the RemoteRig and those that will for the next few months could have stereo reception with the addition of these simple boxes. It would be up to someone else to design them. There would be no need for any software changes. Only a few like me would like the capability.
   I don't fully understand the various speech qualities (0-11). Are 9, 10 and 11 capable of 12KHz bandwidth? If the capability is there then I am very interested in purchasing the RemoteRig.

FYI
   My basic idea for the second channel was to AM modulate a carrier near the high end of the audio passband and mix this with the main channel. At the terminal end this would pass through a high pass filter and be demodulated and filtered to produce the second channel. The main channel would be filtered through a low pass filter. Both channels would be fed to amplifiers. It should be possible to get 2 channels of about 40% of the available audio bandwidth. No expensive parts but lots of time!

   Thank you for your time Mike. I would be interested in your comments.

73
   Tony VE3QF

3

General discussion forum / Re: Remoting the K3

« on: 2010-02-22, 18:43:40 »

Hi Mike
   Thank you for your prompt reply. I have given the stereo capability problem a little thought. I think this can be accomplished with an external box on each end. It all depends on what the maximum bandwidth of the audio hardware is. If there is enough bandwidth it would be a simple matter to shift the second channel above the first and mix them together for input at the server. At the terminal end, the main audio channel would pass through a low pass filter to one channel output and the second channel would pass through a high pass filter before processing and on to the second channel output.
   So, the big question is the bandwidth capability of the hardware. The requirement is for twice the maximum received audio frequency plus some margin for the high and low pass filters. The firmware would have to be able to handle this increased bandwidth. The ideal would be a 20KHz bandwidth but it could be squeezed into a 10KHz or less bandwidth.
   There may be commercial circuits to perform this task. I have not done a search.
   Let us know your thoughts on this.

73
   Tony VE3QF

4

General discussion forum / Re: Remoting the K3

« on: 2010-02-21, 20:44:35 »

Hi Mike
   I am also very interested in using the RemoteRig for my K3. It is unfortunate that the audio, at present, is "mono" and not "stereo". With the second receiver in the K3, it is very advantageus to have 2 audio streams with the main receiver audio going to the left speaker and the sub-receiver audio going to the right speaker or a mixture.
   Will stereo audio be available in the future? Is the hardware wired now for stereo? If not, will it be possible to add/modify in the future?
   I am just about ready to order now if stereo audio will be available in the future. Is there any indication when/if this might take place? I am willing to wait for this feature and, if possible, add it later.
   A second audio channel could also be useful to communicate with the remote station during setup or trouble shooting.

73
   Tony VE3QF