X-GM-THRID: 1235001999037575671 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.35.22.5 with SMTP id z5cs354374pyi; Sat, 28 Apr 2007 14:45:49 -0700 (PDT) Received: by 10.67.30.3 with SMTP id h3mr4069792ugj.1177796748966; Sat, 28 Apr 2007 14:45:48 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id j34si7366538ugc.2007.04.28.14.45.46; Sat, 28 Apr 2007 14:45:48 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) DomainKey-Status: bad (test mode) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Hhuhr-0005SX-MF for rs_out_1@blacksheep.org; Sat, 28 Apr 2007 22:43:51 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Hhuhr-0005SO-2w for rsgb_lf_group@blacksheep.org; Sat, 28 Apr 2007 22:43:51 +0100 Received: from web86404.mail.ird.yahoo.com ([217.146.188.121]) by relay3.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1Hhuhp-0001Yc-Ps for rsgb_lf_group@blacksheep.org; Sat, 28 Apr 2007 22:43:50 +0100 Received: (qmail 27746 invoked by uid 60001); 28 Apr 2007 21:43:44 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=X-YMail-OSG:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=SpdP+OoHvmV9jqTbv0S5WpLfgUU7VPbaGC5OJBfkUTs6D+y5bcpBD4C37ks89oAB+gnA71BH0mxmFJkuB98BXEgeW1VLsfYzX6P6LO5P4x4oYLFvZGTx7dJJwuRoZ32ijWkKwYBH6xvOyNtfstkV2VdNMwZ8QMPTvgF9cOmA6XI=; X-YMail-OSG: H4uSRfsVM1mMffsApgB4erQh3mBT_WlHNac9wqbWCatiTIXLa6aBJvglA8yLsudmWN2nnu4cmn5emnFcVCwLB6Y.Hkka2snIROCWqTuDfpUFhkLt Received: from [80.6.40.58] by web86404.mail.ird.yahoo.com via HTTP; Sat, 28 Apr 2007 22:43:44 BST Date: Sat, 28 Apr 2007 22:43:44 +0100 (BST) From: CHRISTOPHER OSBORN To: rsgb_lf_group@blacksheep.org In-Reply-To: <4633B6F4.24523.3337762@dave.davesergeant.com> MIME-Version: 1.0 Message-ID: <292396.501.qm@web86404.mail.ird.yahoo.com> DomainKey-Status: good (testing) X-Spam-Score: 0.9 (/) X-Spam-Report: autolearn=disabled,HTML_10_20=0.945,HTML_MESSAGE=0.001 Subject: LF: Front panel lettering ? Content-Type: multipart/alternative; boundary="0-216153033-1177796624=:501" Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.63 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 Status: O X-Status: X-Keywords: X-UID: 7184 --0-216153033-1177796624=:501 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Many thanks for all the fast replies concerning my panel lettering problems. I suspect that my hand is not steady enough for a black marker pen and results would prove illegible. We use white labelling machines at work so may I give that a try on a test panel. I've ordered some 'decal' paper from E -bay as I'd never come across that before and it sounds just the ticket. Re the N.O.V. ERP measurement . . . very interesting. On my application I made an assumption about the radiation resistance ( rightly or wrongly) and worked back to calculate an acceptable aerial current. It's not too tricky to measure that and keep it within limits. The current RadCom has an interesting article on 'Understanding Field Strength Measurements' which I've read and re-read several times. Shoot me down in flames but can't one make an RF probe to measure the volts per metre at a set distance from the aerial and then work back to deduce the radiated power ?? 73 Chris G3XIZ Dave Sergeant wrote: Well I shall be using a black marker pen, like I did on my 5MHz TX. Never was an artist... Slowly getting there at G3YMC. TX is now putting a good 8W from a MRF315 into a dummy load, fed by a G0MRF LPF built with T50-2 cores - don't use T50-61 ones, they get very hot as I found out... Now sorting out the bits for an inbuilt swr meter and should be starting the metal bashing on Monday, so provided the antenna likes it I should be on air sometime next week. Interesting to see the comments about NOV details. I supplied a marked up scaled copy of my deeds map, a photo of the vertical and a few notes on what I intended to do and how it was impossible to measure the ERP. NOV came back by return so must have worked - but a note that I am ultimately responsible to ensure I don't cause any interference... 73 Dave G3YMC On 28 Apr 2007 at 20:43, CHRISTOPHER OSBORN wrote: > I've finished my 500 kc/s TRX and the wiring is quite tidy. > Any ideas how I can letter up the front panel controls ? > > I've tried 'Letraset' but it looked so bad I sanded it off and then > resprayed the panel. Suggestions would be much appreciated. > > I had an interesting RX fault today. > One of the audio transistors was going intermittent base-collector > short-circuit. E-Bay transistors - 50 for a �1 - HI ! > > 73 Chris G3XIZ > http://www.davesergeant.com --------------------------------- Yahoo! Mail is the world's favourite email. Don't settle for less, sign up for your freeaccount today. --0-216153033-1177796624=:501 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Many thanks for all the fast replies concerning my panel lettering problems.

I suspect that my hand is not steady enough for a black marker pen and results would prove illegible.
We use white labelling machines at work so may I give that a try on a test panel.
I've ordered some 'decal' paper from E -bay as I'd never come across that before and it sounds just the ticket.

Re the N.O.V. ERP measurement . . . very interesting.
On my application I made an assumption about the radiation resistance ( rightly or wrongly) and worked back to calculate an acceptable aerial current.
It's not too tricky to measure that and keep it within limits.

The current RadCom has an interesting article on 'Understanding Field Strength Measurements' which I've read and re-read several times.
Shoot me down in flames but can't one make an RF probe to measure the volts per metre at a set distance from the aerial and then work back to deduce the radiated power ??

73 Chris G3XIZ




Dave Sergeant <dave@davesergeant.com> wrote:
Well I shall be using a black marker pen, like I did on my 5MHz TX.
Never was an artist...

Slowly getting there at G3YMC. TX is now putting a good 8W from a
MRF315 into a dummy load, fed by a G0MRF LPF built with T50-2 cores -
don't use T50-61 ones, they get very hot as I found out... Now
sorting out the bits for an inbuilt swr meter and should be starting
the metal bashing on Monday, so provided the antenna likes it I
should be on air sometime next week.

Interesting to see the comments about NOV details. I supplied a
marked up scaled copy of my deeds map, a photo of the vertical and a
few notes on what I intended to do and how it was impossible to
measure the ERP. NOV came back by return so must have worked - but a
note that I am ultimately responsible to ensure I don't cause any
interference...

73 Dave G3YMC

On 28 Apr 2007 at 20:43, CHRISTOPHER OSBORN wrote:

> I've finished my 500 kc/s TRX and the wiring is quite tidy.
> Any ideas how I can letter up the front panel controls ?
>
> I've tried 'Letraset' but it looked so bad I sanded it off and then
> resprayed the panel. Suggestions would be much appreciated.
>
> I had an interesting RX fault today.
> One of the audio transistors was going intermittent base-collector
> short-circuit. E-Bay transistors - 50 for a �1 - HI !
>
> 73 Chris G3XIZ
>

http://www.davesergeant.com



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