[Milsurplus] 500 Kc XMTR

[Richard]

I haven't run the math yet, but think I will need about 200 Watts to 
achieve 5 Watts EIRP.

All those extremely long distance reports are most likely using very 
slow transmission methods, which are merely, "Hi, I logged your signal 
last night."  In my mind that's not communication and is mostly 
useless.  Am I missing something?  On the other hand shore stations on 
500 Kc. reported hearing half the hemisphere at night, and working ships 
out 1000 miles was not uncommon.  A local station (New England) once 
worked a ship off the coast of Peru. There is reason for hope.

FYI, VO1NA in Newfoundland is running a beacon on 477.7 Kc at 12 wpm 24 
hours a day.  I didn't hear him last night, but didn't have my best 
receiving antenna and receiver on.

I am ready to go with a TBW, RAL, RAK, and upconverters.  Also a GP I 
haven't fired up yet.  I suspect I may be too close to a transmission 
line, and will know soon enough.

Richard, AA1P


On 09/16/2017 11:46 AM, Kenneth G. Gordon wrote:
> On 16 Sep 2017 at 2:06, Ed Sharpe via Milsurplus wrote:
>
>> what power limit is there,at 500 kc?
> I believe it is 5 watts EIRP, but the notification on the FCC's site will tell for sure.
>
> BTW, given how inefficient any reasonably sized antennas are on that band, output power
> from your amp will have to be much higher than 5 watts.
>
> There was recently a contact on that band between an experimental station in Australia and
> another in Tennessee, so DX is not all that unusual there.
>
> Ken W7EKB
>
> ---
>