Envelope-to: dave@picks.force9.co.uk Delivery-date: Fri, 04 Nov 2005 17:34:35 +0000 Received: by pih-mxcore07.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1EY5ST-0004he-Sd for dave@picks.force9.co.uk; Fri, 04 Nov 2005 17:34:35 +0000 Received: from post.thorcom.com ([193.82.116.20]) by pih-mxcore07.plus.net with esmtp (PlusNet MXCore v2.00) id 1EY5ST-0004gH-NP for dave@picks.force9.co.uk; Fri, 04 Nov 2005 17:34:33 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1EY5S4-00065R-TM for rs_out_1@blacksheep.org; Fri, 04 Nov 2005 17:34:08 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1EY5S4-00065I-EM for rsgb_lf_group@blacksheep.org; Fri, 04 Nov 2005 17:34:08 +0000 Received: from imo-m18.mx.aol.com ([64.12.138.208]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1EY6Ec-0006K8-86 for rsgb_lf_group@blacksheep.org; Fri, 04 Nov 2005 18:24:19 +0000 Received: from G0MRF@aol.com by imo-m18.mx.aol.com (mail_out_v38_r6.3.) id l.1a0.4050d4d5 (16930) for ; Fri, 4 Nov 2005 12:33:58 -0500 (EST) From: G0MRF@aol.com Message-ID: <1a0.4050d4d5.309cf586@aol.com> Date: Fri, 4 Nov 2005 12:33:58 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 SE for Windows sub 5014 Subject: Re: LF: toothbrushes Content-Type: text/html; charset=windows-1252 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit

In a message dated 04/11/2005 16:57:25 GMT Standard Time, hellozerohellozero@hotmail.com writes:

Im hoping to erect a reasonably large but lightweight temp 60m vertical here
in the near future but need to keep the insulator weight down to the minimum
- I see toothbrushes have been used in the past at the 400W level (?) but Im
going to be around that level and concerned over corona _ive made some
lightweight corona rings up but still concerned. I dont think Im going to be
able to top cap load so looking like something around 365pF and perhaps
>3.5mH to resonant

Any pointers and thouughts - yes its a helium lift

Don't compromise on the section joining the balloon to the wire. I recall someone hitting the key for the first time and then seeing a puff of smoke and a kite flying unattached towards the French coast.

I think with a seriously high vertical the high voltage problems will be minimal. - That's not the case with a small vertical where the end voltages are huge!

Good luck!

David