Hi Paul and Alan,
Unfortunately there was some arcing in the coil last night and the
carrier is off at the moment. Thank-you for the signal strengths and
frequencies, Paul. Sorry if this messes up your efforts to relate
3600 metre TA propagation with ionopheric electrons, Alan! It is
interesting indeed.
It may take a rewind to get the coil back in service. The new coil
(0.14 H 57 Ohm) works well, but the older one (.27 H, 94 Ohm) started
sizzling, sparking and smelling of ozone when the new coil was added.
The higher current (0.34 from 0.28 A) and some design flaws caused the
failure. The total inductance to tune the 10x100m rotated L aerial
was 0.48 H tuned by mutual inductance between the 2 coils.
73
Joe VO1NA
On Sun, 18 Jun 2017, Alan Melia wrote:
iHi Paul and Joe. Interesting results on VLF . The following may be
interesting? I dont know how badly electron precipitation affects VLF though
it aligns with the poor results on the 16/17th. The precipitation was low in
the 15th, but no signal seen. (but it doesnt mean conditions were good
.....just not very bad !)
Best Wishes
Alan G3NYK
----- Original Message ----- From: "Paul Nicholson" <[email protected]>
To: <[email protected]>
Sent: Sunday, June 18, 2017 9:41 PM
Subject: Re: LF: NA VLF
Joe wrote:
> I'll keep tranmsission going.
Daytime 15th: No signal detected;
Overnight 15th/16th: Good signal, average 0.12 fT, S/N poor;
Daytime 16th: Down in the noise at about 0.05 fT;
Overnight 16th/17th:
No signal visible, E-field down for some hours;
Daytime 17th:
0.075 fT, S/N 12 dB in 23uHz, 8270.007080 +/- 0.5 uHz
Overnight 17th/18th:
0.13 fT, S/N 12.7 dB in 46.3 uHz, 8270.007085 +/- 0.5 uHz
--
Paul Nicholson
--
|
