Re: stone soup ingredient list, what bands and modes are usable


Bill Cromwell
 

Hi Joe,

The digital modes use SSB and put the tones in through the mic amp. The bandwidth of the SSB filter determines the maximum width that will pass through - not the minimum. When you connect your computer to you SSB radio to do the digital modes you will see a number of different signals on your screen. All of those without changing your radio dial. Because - as you have said - those digotal signals are much narrower than speech. Therefore =, quite a few will fit into the same spectrum as *one* voice.

Putting a five amp fuse in your power supply doesn't force five amps out of it. Rather, it limits the current to 5 amps. Just like that SSB filter limits the bandwidth to about 2.5 or 3 kilocycles.

I hope this helps.

73,

Bill KU8H

On 09/04/2018 12:07 PM, Joe Milosch wrote:
On Tue, 04 Sep 2018 07:42:15 -0700
"ajparent1/KB1GMX" <kb1gmx@arrl.net> wrote:

Thanks to all who replied to this thread.
I look forward to any inexpensive filter kits
being made available, and for now, I'm not going
to worry about a 10 watt signal until someone complains.

As for digital being ssb, wouldn't the bandwidth being used
be a factor? SSB uses the full sideband whereas the digital modes
use significantly less. Or dosn't that matter. I'm thinking
of the need not to use too much audio drive.

Good chart, just what I was hoping for. If I stick to 20m, I
should be alright.

Joe


On Tue, Sep 4, 2018 at 01:56 AM, Joe Milosch wrote:


########################
80m no cw, no ssb, no digital modes
60m digital fine
40m no cw, ssb, digital fine
30m digital fine
20m cw , ssb, digital
17m etc
15m etc
12m etc
10m etc
##########################
First item, Digital is SSB! Really! If SSB is not safe then digital is not either.
Now for those that have been inattentive for the last three months.

########################
80m harmonics, use external low pass filter
60m harmonics, use external low pass filter
40m harmonics, use external low pass filter
30m should be ok cw and SSB-digital
20m should be ok all modes
17m should be ok all modes.
15m CW ok, SSB has spur
12m CW ok, SSB has spur
10m CW ok, SSB has spur
##########################

By should be ok I mean if your not over driving to try and get some power.



--
bark less - wag more

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