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Re: VLF: Carrier on 8270.00709 Hz

To: [email protected]
Subject: Re: VLF: Carrier on 8270.00709 Hz
From: DK7FC <[email protected]>
Date: Sun, 10 Sep 2017 12:51:30 +0200
In-reply-to: <[email protected]>
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Hi Joe,

As Jacek told, there are of course several more distributors for that module, not just amazon. Try to find another source and you will have it in a few days. Maybe it will be a bit more expensive. Even in amazon i can click "Lieferung morgen" (delivery tomorrow), and i will find distributors that seem to be in-land.
Am 09.09.2017 18:46, schrieb [email protected]:
Hi Stefan,

Your sliding bucket VLF coil is making me envious.  Markus uses this
method as well. I am using the pies configuration and limiting my current
to 1/4 amp to prevent high voltage problems.
250 mA is already respectable. I thought you have much less.
After some tinkering I managed to get 1/3A with 2 large pies (~100mH) and
one small one.  The total was 500mH at 150 ohm DC so very low loss,
but very difficult to find the shorted turns when it arcs out.
Same problem here. My large coil had just 680 Ohm at 6.1 H! But as soon as there was a short cutted stack, it is a lot of work to repair it. With the stracked buckets you can reach the faulty windings at once. When deciding for that concept last year, it didn't expect critical field strengths at all.
You are correct that winding VLF coils is relaxing.  There is one motor
to twist the 24 0.08mm wires together and another to wind them on the
lexan spindles. The next step is to use 3 or 4 spindles and think about
how reduce the voltage gradients. It is relaxing watch this action. When I get bored watching, I go in the back yard and work on aerials for a while and check the winding later as it progresses.
Well said :-) That the easy way to do it. Just wind a few hours, when it gets boring just make a break and continue the next day. Listen to some good music, e.g. and think about gigantic DX and deepest frequecies.
You mentioned I should set a goal of 150 uW.
At least. I would try to reach the voltage limit of the antenna wire/isolators.
  The big RL is up again
and I'm looking out for cheap car audio amps so progress is being
made towards higher ERP.
How much power are you running presently?
And who is the next receiving station to you? Is it really Paul? No one else in a 4000 km radius???
73, Stefan

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