Yes, that's a bit of a problem for me here.
I also remember visiting another amateur (who shall remain nameless) in
south Wales and watched as he demonstrated how he could modulate the street
light in front of his house.
I don't (to my knowledge!) do such things when I key down, though I do
modulate the house lights quite nicely. In addition, since my 160m 3/8
inverted L goes 50ft up the tower in the back garden, then over the house to
a 20ft pole on the house chimney stack and then to a 20ft pole in the front
garden I can quite nicely light up the energy saving (fluorescent) light
bulb in the front bedroom so that it (almost) sends CW
For those on the UK, JMS Transformers at Peterborough turn out good quality
transformers quite quickly with something like a week lead time. They're
getting a bit expensive now though, as is everything here.
----- Original Message -----
To: <firstname.lastname@example.org>; <email@example.com>
Sent: Tuesday, February 14, 2012 1:33 PM
Subject: Re: [Amps] Source for plate xfrmer
> Hi Ian, a third requirement for good regulation is a stiff ac power
> service. In rural areas this can be a bit of a problem with C filter
> designs. Can
> also be a problem in older homes with less than robust wiring.
> Same issue as using 240vac instead of 120vac for better regulation.
> Gerald K5GW
> In a message dated 2/14/2012 5:39:26 A.M. Central Standard Time,
> firstname.lastname@example.org writes:
> Rob Atkinson wrote:
>>In your long description you said nothing about the filter caps in use.
>>Please describe them. Ideally I would want one or more oil caps giving
>>around 50 uF with 6 KVWDC
> Good regulation requires two things: low transformer winding resistances
> *and* sufficient capacitance. If the winding resistances are much too
> high (which seems to be the case with Steve's transformer) then even
> large amounts of capacitance can only have a marginal effect.
> This has always been apparent in the old paper charts, and software like
> PSU Designer makes it even clearer.
> 73 from Ian GM3SEK
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