[Lowfer] 472-479 kHz

[Bill Cromwell]

On Tue, 2012-09-25 at 12:36 -0400, craig wasson wrote:
---snip---
> 
> At 472 KHz its probably the groundwave you care about so maybe not an
> issue.  But as long as the power goes out and is not absorbed by lossy
> ground, nearby objects, etc an inefficient antenna is not necessarily
> bad.   Since power is measured as radiated the key is to minimize
> losses beyond the antenna, not within the antenna.  We'll not consider
> the carbon footprint at this time.

Carbon = black. Money = green. Bigger amps cost more to build and the
energy bill is higher. The first bite will be the money footprint. The
carbon footprint will only bite our great grandkids so who cares about
that. We are all probably going to face tradeoffs between antennas and
power amps. I know I will. You forgot to mention settling for something
less that the maximum ERP. We'll all do the best we can with whatever we
have.

---snip---
> 
> Maybe the small loop would be a good choice since it's fairly
> independent of ground and not as much affected by trees, etc.  Biggest
> problem with the small loop was antenna losses from the high current,
> but if you just care about radiated power it may work better than a
> vertical with an imperfect ground as long as you compensate for losses
> with more tx power.

Maybe I missed something but I thought the small loop was suggested as
the receive antenna. You could transmit with it but I would think it's
really fussy - and those current losses...

It's always helpful to look at problems from other vantage points.

---snip---
> 
> Craig - N6IO

73,

Bill  KU8H