Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mj02.r1000.mx.aol.com (Internet Inbound) with ESMTP id AE8D138000154; Wed, 19 Dec 2012 17:30:30 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TlS9A-0007zo-9M for rs_out_1@blacksheep.org; Wed, 19 Dec 2012 22:29:52 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TlS99-0007zf-K1 for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2012 22:29:51 +0000 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TlS97-0002pZ-BF for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2012 22:29:50 +0000 Received: from AGB ([2.26.22.72]) by mwinf5d32 with ME id daVT1k00H1ZK6g203aVTuM; Wed, 19 Dec 2012 23:29:28 +0100 Message-ID: From: "Graham" To: 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> <1355938960.81752.YahooMailNeo@web133205.mail.ir2.yahoo.com> <6DEA6A69388143C982FD7A3B1340B233@AGB> <1355943205.10939.YahooMailNeo@web133204.mail.ir2.yahoo.com> In-Reply-To: <1355943205.10939.YahooMailNeo@web133204.mail.ir2.yahoo.com> Date: Wed, 19 Dec 2012 22:29:27 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 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: Now there is a idea , could use a music synth to make a wobbly note , and send it via the ssb exciter , for a real retro vintage cw sound ? just had a long retro data qso with Chris xiz , on 502 , must be 2 years at least since used rtty , beacon still running now , not sure if anyone is still monitoring , all this web linking has spoiled things ! [...] 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 [80.12.242.59 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 4547f2cca70c75b03fc1ebaed398eea1 Subject: Re: LF: Better picture of the 807 based 500kHz TX Content-Type: multipart/alternative; boundary="----=_NextPart_000_02CA_01CDDE38.4E4B1250" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.4 required=5.0 tests=HTML_50_60,HTML_FONT_BIG, HTML_MESSAGE,MISSING_OUTLOOK_NAME 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-sid: 3039ac1d7b9650d240067db4 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_02CA_01CDDE38.4E4B1250 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Now there is a idea , could use a music synth to make a wobbly = note , and send it via the ssb exciter , for a real retro vintage = cw sound ? just had a long retro data qso with Chris xiz , on 502 , must be = 2 years at least since used rtty , beacon still running now , = not sure if anyone is still monitoring , all this web linking = has spoiled things ! =20 73 -G.. From: M0FMT=20 Sent: Wednesday, December 19, 2012 6:53 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Better picture of the 807 based 500kHz TX OK Graham Good point! But it doesn't jump it chirps quite pleasently Louis PA0LCE = runs one on 500kc/s and tells me ops like the Retro sound. 73 es GL Pete M0FMT IO91UX From: Graham To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, 19 December 2012, 17:52 Subject: Re: LF: Better picture of the 807 based 500kHz TX Probably a early form of Spread Spectrum , hard to JAM if is = its jumping about the band and difficult to make a fake = transmission if the Tx has a wobbly bob signature : ) G..=20 From: M0FMT=20 Sent: Wednesday, December 19, 2012 5:42 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Better picture of the 807 based 500kHz TX 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.=20 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. 73 es GL Pete M0FMT IO91UX From: mal hamilton To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, 19 December 2012, 11:55 Subject: Re: LF: Better picture of the 807 based 500kHz TX Hi Pete Stabilise both Plate es Screen on an Oscillator, followed by a = Cathode follower to avoid chirp and osc pulling.=20 The T1154 was very unstable with a bad chirp, surprised it ever = passed Quality Control G3KEV ----- Original Message -----=20 From: M0FMT=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, December 19, 2012 10:08 AM Subject: Fw: LF: Better picture of the 807 based 500kHz TX Try again minus cct too big I think. 73 es GL Pete M0FMT IO91UX ----- Forwarded Message ----- From: M0FMT To: "rsgb_lf_group@blacksheep.org" = =20 Sent: Wednesday, 19 December 2012, 9:52 Subject: Re: LF: Better picture of the 807 based 500kHz TX Hi Dimitris and group I have not seen the schematic but it is usual to stabilise the = screen of a power oscillator to reduce chirp on key down. Now you have shown us yours I will show you mine. I usually = sketch the schamatic after the event so foregive the presentation on the = back of an envelope. I now get at least 4Watts after adjusting the ant link coupling = away from the chasis. Best audible DX Kent 80miles best Opera DX PA0 = land. 73 es GL Pete M0FMT IO91UX From: Dimitrios Tsifakis To: rsgb_lf_group@blacksheep.org=20 Sent: Tuesday, 18 December 2012, 23:46 Subject: Re: LF: Better picture of the 807 based 500kHz TX 2012/12/19 Graham : > Why the stabilised screen supply ? > G.. It's embarassing. I like the glow of VR tubes! :-) 73, Dimitris VK1SV =20 =20 ------=_NextPart_000_02CA_01CDDE38.4E4B1250 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Now  there is  a  idea  , could  use  = a =20 music  synth  to  make a wobbly note  , and  = send=20 it  via the  ssb exciter , for  a  real  retro = vintage=20 cw sound ?
 
just had a long  retro  data  qso  with =20 Chris  xiz , on 502 , must be  2  years at  = least =20 since used  rtty  ,   beacon  still  = running =20 now  , not  sure  if anyone is  still  = monitoring =20 , all  this  web linking  has  spoiled  things=20 !  
 
73 -G..

From: M0FMT
Sent: Wednesday, December 19, 2012 6:53 PM
Subject: Re: LF: Better picture of the 807 based 500kHz=20 TX

OK Graham
 
Good point!=20 But it doesn't jump it chirps quite pleasently Louis PA0LCE runs one on 500kc/s = and tells me=20 ops like the Retro = sound.
 
73 es GL Pete M0FMT IO91UX
From: Graham <g8fzk@g8fzk.fsnet.co.uk>To: rsgb_lf_group@blacksheep.org= =20
Sent: Wednesday, = 19 December=20 2012, 17:52
Subject: Re: LF:=20 Better picture of the 807 based 500kHz TX

Probably   a  early  form  of  = Spread=20 Spectrum  , hard to  JAM   if is its =20 jumping   about the  band  and  = difficult =20 to  make a  fake  transmission if the  Tx has = a =20 wobbly  bob  signature  : )
 
G..

From: M0FMT
Sent: Wednesday, December 19, 2012 5:42 PM
To: rsgb_lf_group@blacksheep.= org=20
Subject: Re: LF: Better picture of the 807 based 500kHz=20 TX

OK Mal
 
Point taken. I was referring to a "Power" = oscillator like a single 6L6 used as an Xtal oscillator running at 15 / = 20Watts=20 which means normally there is insufficient current = (really)=20 from a VR tube=20 for the Anode(plate) so all that is necessary is to stab the screen. = Otherwise=20 I totally agree.
I do know the standard T1154 chirps well. There is a PA0 = who runs=20 one on 500 and I am sure you have worked him it is like a = signature=20 signal HI. 
I think there was some kind unpleasantness going = on at the=20 time of the T1154 manufacture so the fine points of = frequency=20 control was probably a low priority.
73 es GL=20 Pete M0FMT IO91UX
From: mal hamilton=20 <g3kevmal@talktalk.net>
To: = rsgb_lf_group@blacksheep.org=20
Sent: Wednesday, = 19=20 December 2012, 11:55
Subject: Re: LF: Better = picture of the=20 807 based 500kHz TX

Hi Pete
Stabilise both Plate es Screen on an = Oscillator,=20 followed by a Cathode follower to avoid chirp and osc = pulling.=20
The T1154 was very unstable with a bad = chirp,=20 surprised it ever passed Quality Control
G3KEV
 
-----=20 Original Message -----
From:=20 M0FMT =
To:=20 rsgb_lf_group@blacksheep.= org=20
Sent:=20 Wednesday, December 19, 2012 10:08 AM
Subject:=20 Fw: LF:=20 Better picture of the 807 based 500kHz TX

 Try again minus cct too big I think.

73 es GL Pete M0FMT IO91UX
----- Forwarded = Message=20 -----
From: = M0FMT=20 <m0fmt@yahoo.co.uk>
To: "rsgb_lf_group@blacksheep.= org"=20 <rsgb_lf_group@blacksheep.= org>=20
Sent: = Wednesday, 19=20 December 2012, 9:52
Subject: Re: LF: Better = picture of=20 the 807 based 500kHz TX

Hi Dimitris and = group
 
I have not seen the schematic but it is usual to = stabilise=20 the screen of a power oscillator to reduce chirp on key=20 down.
Now you have shown us yours I will show you mine. I = usually=20 sketch the schamatic after the event so = foregive the=20 presentation on the back of an envelope.
I now get at least 4Watts after adjusting the ant = link=20 coupling away from the chasis. Best audible DX = Kent 80miles=20 best Opera DX PA0 land.
73 es GL Pete M0FMT IO91UX
From: Dimitrios=20 Tsifakis=20 <dtsifakis@gmail.com>
To: = rsgb_lf_group@blacksheep.org=20
Sent: = Tuesday, 18=20 December 2012, 23:46
Subject: Re: LF: Better = picture=20 of the 807 based 500kHz TX

2012/12/19 = Graham=20 <g8fzk@g8fzk.fsnet.co.uk>= ;:
>=20 Why the  stabilised  screen  supply ?
>=20 G..

It's embarassing. I like the glow = of VR tubes!=20 :-)

73, Dimitris VK1SV



 




 

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