[600MRG] HF-MF band planning

[Jim Miller]

And I'm planning to homebrew a GPSDO for fun as well.

jim ab3cv


On Tue, Mar 4, 2014 at 10:49 AM, Jim Miller <jim at jtmiller.com> wrote:

> Hi Bill
>
> I'll be using CW, JT9 and one of the "conversational" MFSK modes
> eventually. Since I don't plan on a linear I won't have PSK31.
>
> jim
>
>
> On Tue, Mar 4, 2014 at 10:37 AM, Bill Cromwell <wrcromwell at gmail.com>wrote:
>
>> On 03/03/2014 10:27 PM, Jim Miller wrote:
>>
>>> JT65 and the rest of the JT modes are FSK and inherently don't need SSB.
>>> They can of course be generated that way and poorly at times.
>>>
>>> PSK31 requires a linear that you'd find in an SSB rig.
>>>
>>> jim ab3cv
>>>
>>>
>>>  Hi Jim,
>>
>> Thanks for pointing that out. You have helped me decide which digital
>> mode(s) to try to implement here. Whatever I do will be one for QSO modes.
>> AND will include CW. I saw comments about reserving the whole new band for
>> WSPR and other slow motion modes that we can't even hear. One argument was
>> emergencies. My own impression of those are that an emergency will already
>> have played out to it's conclusion before any real communication could be
>> completed. The population of hams using those modes is small compared to
>> the pool of hams available and there may not be enough surviving hams in an
>> affected area to even initiate emergency traffic on those modes.
>>
>> In past posts I have made light of WSPR and the other slow motion modes
>> (some of which require an internet connection!) and especially frequency
>> control down into the fractional milliHertz tolerances. I applaud the hams
>> who invest time, effort, and money chasing that but I ain't going there.
>> With a 7 kc band I AM chasing TCXOs with *NO* free running VFOs. But I am
>> planning to use more effective, lightning fast CW at maybe 15 WPM <evil
>> grin>. Use of a waterfall display should help us sort out where the
>> openings are and where we would just be QRM.
>>
>> 73,
>>
>> Bill  KU8H
>>
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>>
>