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[Amps] Re: PS project part2

To: <amps@contesting.com>
Subject: [Amps] Re: PS project part2
From: 2 at vc.net (2)
Date: Mon Apr 14 13:03:14 2003

>
>Pat said:
>
>>Would cycling them, say yearly, at least, enhance reliability?
>
>In the UK, protective circuit breakers doing earth leakage ( called RCD,
>residual Current Devices) are supposed to be tripped every 3 months because
>of them showing a tendency to stick.
>
>Since they insisted on fitting the damn things when I had some rewiring
>done slat year, I can't use the linear with the dipole on 80m - the damn
>breaker trips at 250watts out because of the RF getting into it.

?  Some workarounds:
1.  put a RF bypass C across the RCD.
2.  add a coaxial RF choke [4 to 5-metres of coax wound single-layer on 
3" to 4" ABS plastic sewer pipe] to the dipole's feedline to keep RF from 
returning to the radio-room (and the mains) on the outside of the shield. 
 The best place for the choke is at the dipole's center feedpoint
3.  replace the RCD with a conventional breaker and inform house 
residents that it is no lomger safe to take a shower or bath with a hair 
dryer.


>Fortunately, the vertical which is the DX antenna, is OK. The dipole runs
>directly over the house, so the field is fairly high, but the things should
>stand a fair amount of induced RF on teyh mains wires.
>
>73
>
>Peter G3RZP
>
>
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-  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
www.vcnet.com/measures.  
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