From: "Gary - G4WGT" <g4wgt@tiscali.co.uk>
To: rsgb_lf_group@blacksheep.org
Date: Mon, 28 Mar 2005 20:48:25 +0100
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Subject: LF: RE: Re: Re : tests.
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Hi Mal & LF,

I am using the G0MRF 300 watt Tx but since blowing several PA mosfets I
decided to carry out the M0BMU PA mods using the original toroid & I can now
run a cool PA up to 650 watts into dummy load bench testing. I put it on air
into antenna & started with 280 watts & on following tests gradually
increased to 420 watts (still cool) with antenna current up to 2.3 Amps it
was at this time I got corona/arcing on the spiral top load so I stopped
tests until I have the time to lower the mast & carry out a visual
inspection of the area of arcing so as to effect a cure. I suspect that I
may have too little clearance between the spiral & the metal fixing
hardware, an inspection will be carried when work & family permit.

Regards,

Gary - G4WGT - IO83qp

Web : http://myweb.tiscali.co.uk/wgtaylor


-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of hamilton mal
Sent: 28 March 2005 12:27
To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: Re : tests.


----- Original Message -----
From: "Gary - G4WGT" <g4wgt@tiscali.co.uk>
To: "LF (Rsgb LF Group)" <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, March 22, 2005 9:26 PM
Subject: LF: Re : tests.


>
> Hi All at LF,
>
> Had to cease tests as I saw arcing on the spriral top load several times,
it
> has been raining today so it may be due to the wet on the  spiral or
> possibly a problem with the higher power or a combination of both. I will
> keep you informed.
>
> Regards,
>
> Gary - G4WGT - IO83qp
>
> Web : http://myweb.tiscali.co.uk/wgtaylor
>
>
Hi Gary
What sort of PA have you now got. There was some discussion earlier about
Cap and Res values etc so what values did you find optimum.
73 de Mal/G3KEV