[Lowfer] Frequency usage question

[John Andrews]

Mike,

I understand. The various beacons I have run have all had exciters 
inside the shack. The TAG transmitter presently on the air from Maine is 
an extreme example, with a very nice 10 MHz proportional oven 
oscillator. But it was designed to run in an unheated building (next to 
a lake in the winter), and to also have a WOLF mode that requires high 
stability. There are a number of less demanding possibilities, such as 
gluing a thermistor to the crystal can (see: 
http://www.lowfer.us/k0lr/all-in-one/all-in-1.htm ). I got by for a long 
time by having a box within a box with styrofoam insulation between the 
two. Of course, that was again inside the shack.

That graphical ID thing that Bill had was quirky, and needed to be 
tweaked periodically. Do remember that he ran plain old QRSS30 or 60 for 
quite a while before that, until he noticed that slanted "waveforms" 
seemed to be more noticeable by eye. You might want to start with QRSS, 
and let things develop from there. That way, the guys would have 
something familiar to look for. Just a thought.

John, W1TAG

On 11/10/2014 7:40 PM, N8OOU wrote:
> John, thanks for the captures from your archive. The Wm exciter will 
> operate based on a switch selectable R/C oscillator or crystal that is 
> pulled by a control voltage.
> In trying to understand the circuits, I wondered if the signal would 
> drift as it does not have any "environmental control" other than the 
> metal case. In my testing I could impart a small frequency change by 
> just breathing on the oscillator area.  I may need to change where I 
> planned to locate the exciter.
>
> 73   de   N8OOU - Mike Meek
>
> On 11/10/2014 05:45 PM, John Andrews wrote:
>> Charlie,
>>
>> I'm not sure that both attachments will make it through, but WM.jpg is a
>> shot of what the signal looked like over the air. WmVD.jpg is a shot of
>> Wm and VD (Jay, W1VD), again over the air. In that picture, "800"
>> represents 185.300 kHz. Bill generally tried to keep the bottom of the
>> Wm on 185.300, but as you can see from looking at the rig, it ain't an
>> atomic standard...
>>
>> John, W1TAG
>>
>>
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