Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk01.r1000.mx.aol.com (Internet Inbound) with ESMTP id E15DF3800008B; Wed, 19 Dec 2012 13:09:54 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TlNiQ-0004f6-WD for rs_out_1@blacksheep.org; Wed, 19 Dec 2012 17:45:58 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TlNiQ-0004ex-98 for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2012 17:45:58 +0000 Received: from nm5.bullet.mail.ird.yahoo.com ([77.238.189.62]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1TlNiN-0001RD-TP for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2012 17:45:57 +0000 Received: from [77.238.189.48] by nm5.bullet.mail.ird.yahoo.com with NNFMP; 19 Dec 2012 17:45:33 -0000 Received: from [212.82.108.135] by tm1.bullet.mail.ird.yahoo.com with NNFMP; 19 Dec 2012 17:45:33 -0000 Received: from [127.0.0.1] by omp1040.mail.ird.yahoo.com with NNFMP; 19 Dec 2012 17:45:33 -0000 X-DKIM-Result: Domain=yahoo.co.uk Result=Good and Known Domain X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 816646.93402.bm@omp1040.mail.ird.yahoo.com Received: (qmail 88513 invoked by uid 60001); 19 Dec 2012 17:42:40 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1355938960; bh=RsK7fNI5N1isk4GZiSwx+zNjMJbo0+KZ9uwa1iCaGJ0=; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=WwfDsRktrFSwPNN7ZaJg+8bAJ9AV+T6mixs7ugOqEEgQUGwIfmx3DZOYAZ5OyOP6IElEJvwJPMMRz/74890bNEtPoAD19FXfRJ0W30DEGwBRyGZzEbLa7vynjiS7okAMY55RkyoS53a5aE5u81e5yJdN7+bwS+sm3IzufwTFxTc= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=i+UwezS8qIm55TSeGv1h6/CrU0OMaP0yShs3+Z7S3zzCldpC1LdrmOv++mJF0g/4bfGGnimSoc1Clqnp0kFZhqZ98NodEMPW55pIbTsxXZ1H7nlphhuG+JI0fWYznxNIgSK3FDvEBv16QmF0Lq/9tO7DFZwcuqROwp4aoxs8ftc=; X-YMail-OSG: bMemamwVM1kCUKoZOs5UZ9_Xu0RkawllyR_sil1sZrOzk2p iQG29LeCC9aEwqv.N3i_7 Received: from [31.51.111.241] by web133205.mail.ir2.yahoo.com via HTTP; Wed, 19 Dec 2012 17:42:40 GMT X-Rocket-MIMEInfo: 001.001,T0sgTWFsCsKgClBvaW50IHRha2VuLiBJIHdhcyByZWZlcnJpbmcgdG8gYSAiUG93ZXIiIG9zY2lsbGF0b3IgbGlrZSBhIHNpbmdsZSA2TDYgdXNlZCBhcyBhbiBYdGFswqBvc2NpbGxhdG9yIHJ1bm5pbmcgYXQgMTUgLyAyMFdhdHRzIHdoaWNoIG1lYW5zIG5vcm1hbGx5wqB0aGVyZSBpcyBpbnN1ZmZpY2llbnQgY3VycmVudCAocmVhbGx5KSBmcm9tIGEgVlIgdHViZSBmb3IgdGhlIEFub2RlKHBsYXRlKSBzbyBhbGwgdGhhdCBpcyBuZWNlc3NhcnkgaXMgdG8gc3RhYiB0aGUgc2NyZWVuLiBPdGhlcndpc2UgSSABMAEBAQE- X-Mailer: YahooMailWebService/0.8.129.483 References: <20121218092921.Horde.h2yZX_rSz0VQ0BtRPVIC2uA@posti.anvianet.fi> <20121218100332.Horde.2ASBc_rSz0VQ0CNU8mNkBhA@posti.anvianet.fi> <20121218152622.Horde.XfcUIerSz0VQ0G7_VqKUnlA@posti.anvianet.fi> <83EEBFC65ED94B0880138E0637A84E24@AGB> <1355910758.35770.YahooMailNeo@web133201.mail.ir2.yahoo.com> <1355911711.86770.YahooMailNeo@web133202.mail.ir2.yahoo.com> <001801cddddf$cb3758e0$0501a8c0@xphd97xgq27nyf> Message-ID: <1355938960.81752.YahooMailNeo@web133205.mail.ir2.yahoo.com> Date: Wed, 19 Dec 2012 17:42:40 +0000 (GMT) From: M0FMT To: "rsgb_lf_group@blacksheep.org" In-Reply-To: <001801cddddf$cb3758e0$0501a8c0@xphd97xgq27nyf> MIME-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: OK Mal Point taken. I was referring to a "Power" oscillator like a single 6L6 used as an Xtal oscillator running at 15 / 20Watts which means normally there is insufficient current (really) from a VR tube for the Anode(plate) so all that is necessary is to stab the screen. Otherwise I totally agree. I do know the standard T1154 chirps well. There is a PA0 who runs one on 500 and I am sure you have worked him it is like a signature signal HI. I think there was some kind unpleasantness going on at the time of the T1154 manufacture so the fine points of frequency control was probably a low priority. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [77.238.189.62 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (m0fmt[at]yahoo.co.uk) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 09c1a181dc7b5fd4ce37590584a561d1 Subject: Re: LF: Better picture of the 807 based 500kHz TX Content-Type: multipart/alternative; boundary="-1690458260-126584163-1355938960=:81752" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_50_60,HTML_FONT_BIG, HTML_MESSAGE,TO_ADDRESS_EQ_REAL 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 x-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mtain-mk01.r1000.mx.aol.com ; domain : yahoo.co.uk DKIM : fail x-aol-sid: 3039ac1d618550d202f272ec X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ---1690458260-126584163-1355938960=:81752 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable OK Mal=0A=A0=0APoint taken. I was referring to a "Power" oscillator like a = single 6L6 used as an Xtal=A0oscillator running at 15 / 20Watts which means= normally=A0there is insufficient current (really) from a VR tube for the A= node(plate) so all that is necessary is to stab the screen. Otherwise I tot= ally agree.=0AI do know the standard T1154 chirps well. There is a PA0 who = runs one on 500 and I am sure you have worked him=A0it is like a signature = signal HI.=A0=0AI think there was some kind unpleasantness going on at the = time of the T1154 manufacture=A0so the=A0fine points of frequency control w= as probably a low priority.=0A=0A73 es GL Pete M0FMT IO91UX=0A=0A=0A>______= __________________________=0A> From: mal hamilton = =0A>To: rsgb_lf_group@blacksheep.org =0A>Sent: Wednesday, 19 December 2012,= 11:55=0A>Subject: Re: LF: Better picture of the 807 based 500kHz TX=0A> = =0A>=0A> =0A>Hi Pete =0A>Stabilise both Plate es Screen on an Oscillator, f= ollowed =0Aby a Cathode follower to avoid chirp and osc pulling. =0A>The T= 1154 was very unstable with a bad chirp, surprised it =0Aever passed Qualit= y Control =0A>G3KEV =0A>=0A>----- Original Message ----- =0A>>From: M0FMT = =0A>>To: rsgb_lf_group@blacksheep.org =0A>>Sent: Wednesday, December 19, = 2012 10:08 AM =0A>>Subject: Fw: LF: Better picture of the 807 based 500kH= z TX =0A>>=0A>> =0A>> =0A>>=A0Try again minus cct too big I think.=0A>>=0A>= > =0A>>73 es GL Pete M0FMT IO91UX=0A>>=0A>>----- Forwarded Message -----= =0A>>>From: M0FMT =0A>>>To: "rsgb_lf_group@blacksheep.or= g" =0A>>>Sent: Wednesday, 19 December 2012= , 9:52=0A>>>Subject: Re: LF: Better picture of the 807 based 500kHz TX=0A>= >>=0A>>>=0A>>>Hi Dimitris and group =0A>>>=A0 =0A>>>I have not seen the sch= ematic but it is usual to stabilise the screen of a power oscillator to re= duce chirp on key down. =0A>>>Now you have shown us yours I will show you m= ine. I usually sketch the schamatic after the event so foregive the presen= tation on the back of an envelope. =0A>>>I now get at least 4Watts after a= djusting the ant link coupling away from the chasis. Best audible DX Kent = 80miles best Opera DX PA0 land.=0A>>> =0A>>>73 es GL Pete M0FMT IO91UX=0A>= >>=0A>>>=0A>>>>________________________________=0A>>>>From: Dimitrios Tsifa= kis =0A>>>>To: rsgb_lf_group@blacksheep.org =0A>>>>Se= nt: Tuesday, 18 December 2012, 23:46=0A>>>>Subject: Re: LF: Better picture= of the 807 based 500kHz TX=0A>>>>=0A>>>>2012/12/19 Graham :=0A>>>>> =0A Why the=A0 stabilised=A0 screen=A0 supply ?=0A= >>>>> =0A G..=0A>>>>=0A>>>>It's embarassing. I like the glow of VR tub= es! :-)=0A>>>>=0A>>>>73, =0A Dimitris =0A VK1SV=0A>>>>=0A>>>>=0A>>>= >=0A>>>>=A0=0A>>>=0A>>> =0A>=0A>=A0 ---1690458260-126584163-1355938960=:81752 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
OK Mal
=
 
Point taken. I was referring to a "Power" oscillator like a singl= e 6L6 used as an Xtal os= cillator running at 15 / 20Watts which means normally there is insufficient current (really) from a <= span id=3D"misspell-3" class=3D"mark">VR tube for the Anode(plate) s= o all that is necessary is to stab the screen. Otherwise I totally agree.
I do know the standard T1154 chirps well. There is a = PA0 who runs one on 500 and I am sure you have worked him it is like a= signature signal HI. 
I think there was some k= ind unpleasantness going on at = the time of the T1154 manufacture so the fine points of frequency control= was probably a low priority.
73 es GL Pete M0FMT IO91UX
<= b>From: mal hamilto= n <g3kevmal@talktalk.net>
To= : rsgb_lf_group@blacksheep.org
Sent: Wednesday, 19 December 2012, 11:55
Subject: Re: LF: Better picture of = the 807 based 500kHz TX

=0A= =0A =0A =0A=0A=0A
=0A
Hi Pete
=0A
Stabilise both Plate es Screen on a= n Oscillator, followed =0Aby a Cathode follower to avoid chirp and osc pulling.
=0A
The T1154 was very unstable with a bad chirp, surprised = it =0Aever passed Quality Control
=0A
= G3KEV
=0A
 
=0A
=0A
----- Original Message -----
=0A
From: =0A M0FMT
=0A =0A =
Sent: Wednesday, December 19, 2012 10:08 =0A AM
=0A=
Subject: Fw: LF: Better picture of the =0A 807 based 500kHz TX
=0A

=
=0A
=0A=
=0A
 Try again minus cct too big I think.

=0A
7= 3 es GL Pete M0FMT IO91UX
=0A
=0A = =0A
=0A
-= ---- Forwarded Message =0A -----
m0fmt@yahoo.= co.uk>
To: "rsgb_lf_group@blackshee= p.org" =0A <rsgb_lf_group@blacksheep.org> =0A
Sent: Wednesday, 19 =0A December 2012, 9:52Subject: Re: LF: Better = picture of the =0A 807 based 500kHz TX

=0A
=0A
=0A
=0A
Hi Di= mitris and group
=0A
 <= /div>=0A
I have not seen the schematic but it is usual to sta= bilise the =0A screen of a power oscillator to reduce chirp on key down.=
=0A
Now you have shown us yours I will show you = mine. I usually =0A sketch the s= chamatic after the event so = foregive the presentation on the =0A back of an envelope.<= /div>=0A
I now get at least 4Watts after adjusting the ant li= nk coupling =0A away from the ch= asis. Best audible DX= Kent 80miles best Opera DX = PA0 =0A land.
=0A
73 es GL Pete M0FMT IO91UX
=0A
=0A
=0A
=0A =
=0A
= From: Dimitrios T= sifakis =0A <dtsifakis@gmail.com>
To: rsgb_lf_group@blacksheep.org =0A
= Sent: Tuesday, 18 =0A = December 2012, 23:46
Subject: Re: LF: Better picture of =0A the 807 based 500kHz TX

2012/12/19 Graham <g8fzk@g8fzk.fsnet.co.uk>:
> =0A Why the  stabil= ised  screen  supply ?
> =0A G..

It's embarassing. I like the glow of VR tubes! :-)

73, =0A = Dimitris =0A VK1SV



 
=


=0A


 
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