Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dh03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 06A5E3800010F; Sun, 26 Aug 2012 03:44:31 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1T5XUn-0002uA-Kt for rs_out_1@blacksheep.org; Sun, 26 Aug 2012 08:42:57 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1T5XUm-0002u1-Pn for rsgb_lf_group@blacksheep.org; Sun, 26 Aug 2012 08:42:56 +0100 Received: from vsmtp12.tin.it ([212.216.176.206]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1T5XUk-0003X4-Is for rsgb_lf_group@blacksheep.org; Sun, 26 Aug 2012 08:42:55 +0100 Received: from marco09cqcdi12 (79.6.168.79) by vsmtp12.tin.it (8.6.023.02) id 4F66651510A9C014 for rsgb_lf_group@blacksheep.org; Sun, 26 Aug 2012 09:42:53 +0200 Message-ID: <000b01cd835e$5afa9af0$4201a8c0@marco09cqcdi12> From: "Marco Cadeddu" To: References: <5038EBED.50101@kabelmail.de> <001301cd82e1$aa0725a0$4201a8c0@marco09cqcdi12> <50391A36.8000503@kabelmail.de> Date: Sun, 26 Aug 2012 07:42:33 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Spam-Score: 3.4 (+++) 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: Hi Tom, it's a really pity that no output is available below 160m.. but probably also in this case the reason is some "digital" block (I guess a diode somewhere) blocking the tx enable in order to save the final unit. The TS950SD should had (at least my has) the high stability TCXO on board (stability ±0,5 ppm) but at least in my case I experienced the (whithin specification) drift only on tx (10MHz band) and it was cured using the external high stability 10 kHz reference derived from the Rb oscillator. [...] Content analysis details: (3.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.216.176.206 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (marcocadeddu[at]tin.it) -0.2 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 3.6 AXB_XMAILER_MIMEOLE_OL_A7B9C AXB_XMAILER_MIMEOLE_OL_A7B9C X-Scan-Signature: f50ffa2d596e60b11ae43c4854906bce Subject: Re: LF: Re: Modifications of Kenwood TS 950 SD and TS 50 S Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01CD835E.5A620470" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,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 x-aol-global-disposition: G x-aol-sid: 3039ac1d41175039d3df2610 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_0008_01CD835E.5A620470 Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable Hi Tom, it's a really pity that no output is available below 160m.. but probably = also in this case the reason is some "digital" block (I guess a diode = somewhere) blocking the tx enable in order to save the final unit. The TS950SD should had (at least my has) the high stability TCXO on = board (stability =B10,5 ppm) but at least in my case I experienced the = (whithin specification) drift only on tx (10MHz band) and it was cured = using the external high stability 10 kHz reference derived from the Rb = oscillator. By the way use the TS950SD on rx with no change from the original (no = replaced the xfmr as suggested from I2PHD) having satisfactory = sensibility and only strange indications from the Smeter. GL es DX Marco IK1HSS ----- Original Message -----=20 From: DK1IS=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, August 25, 2012 6:32 PM Subject: Re: LF: Re: Modifications of Kenwood TS 950 SD and TS 50 S Hello Marco, modifying to general TX coverage results in a lowest TX QRG of 1620 = kHz for the TS 950 and (heaven knows why) 1705 kHz for the TS 50. At = lower frequencies there is no driver output so these modifications are = no solution for MF/LF. But I hope someone knows a trick to override = this behaviour. Concerning the TX stability of TS 950 SD: using the internal TXCO my = unit is very stable however showing an absolute deviation of abt. +5 Hz = at 30 MHz. I have improved it similar to you by using a 10 kHz GPS = reference (Jupiter board) synchronizing the alternative low-cost = Xtal-oscillator on board of the TS 950 whose stand alone stability is = much worse than that from the TXCO. Certainly you know you have to = change two switches for activating the TXCO. Tu, 73 es cuagn Tom, DK1IS Am 25.08.2012 18:49, schrieb Marco Cadeddu: Hello Tom, although the TS950SD is in my my shack since 1991..I never made the = modification for general tx coverage. I don't think it can transmit on = 500 kHz if you carry out the mod, but probably could be used as starting = point unplugging the rear connection between driver and PA and replacing = with a devoted external PA (I'm using this rig in such way to drive an = external 137 kHz xvtr). Just for info, I was disappointed about the frequency stability of = TS950SD: a rock in reception (both direct on 137k or via the xvtr on the = 10 MHz band) but on tx, although the PA was cutted out, not suitable for = qrss with several Hz of drift...now I found a a 10MHz Rb oscillator that = is used for LO on the xvrt and divided to 10 kHz to control the PLL via = the rear input. Let me know if you get a useful signal from the drive out socket on = 470kHz. 73 de Marco. IK1HSS ----- Original Message -----=20 From: DK1IS=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, August 25, 2012 3:14 PM Subject: LF: Modifications of Kenwood TS 950 SD and TS 50 S Hello dear LF-group, does anyone have proven experiences about a.. modification of TS 950 SD for transmitting CW on MF, perhaps = LF too ("general coverage transmission" already realized) b.. the same for TS 50 S,=20 c.. overriding the permanent ALC at TS 50 S ?=20 As usual, there were no answers on my inquiries to Kenwood - = neither from the German office nor from Japan ;-) Tu es 73, Tom, DK1IS=20 ------=_NextPart_000_0008_01CD835E.5A620470 Content-Type: text/html; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable
Hi Tom,
 
it's a really pity that no output is = available=20 below 160m.. but probably also in this case the reason is some "digital" = block=20 (I guess a diode somewhere) blocking the tx enable in order to save the = final=20 unit.
The TS950SD should had (at least my = has) the high=20 stability TCXO on board (stability =B10,5 ppm) but at least in my case I = experienced the (whithin specification) drift only on tx (10MHz band) = and it was=20 cured using the external high stability 10 kHz reference derived from = the Rb=20 oscillator.
 
By the way use the TS950SD on rx with = no change=20 from the original (no replaced the xfmr as suggested from I2PHD) having=20 satisfactory sensibility and only strange indications from the=20 Smeter.
 
GL es DX
 
Marco IK1HSS
----- Original Message -----
From:=20 DK1IS
Sent: Saturday, August 25, 2012 = 6:32=20 PM
Subject: Re: LF: Re: = Modifications of=20 Kenwood TS 950 SD and TS 50 S

Hello Marco,

modifying to general = TX=20 coverage results in a lowest TX QRG of 1620 kHz for the TS 950 and = (heaven=20 knows why) 1705 kHz for the TS 50.  At lower frequencies there is = no=20 driver output so these modifications are no solution for MF/LF.  = But I=20 hope someone knows a trick to override this behaviour.
Concerning = the TX=20 stability of TS 950 SD: using the internal TXCO my unit is very stable = however=20 showing an absolute deviation of abt. +5 Hz at 30 MHz. I have improved = it=20 similar to you by using a 10 kHz GPS reference (Jupiter board) = synchronizing=20 the alternative low-cost Xtal-oscillator on board of the TS 950 whose = stand=20 alone stability is much worse than that from the TXCO. Certainly you = know you=20 have to change two switches for activating the TXCO.

Tu, = 73 es=20 cuagn
Tom, DK1IS


Am 25.08.2012 18:49, schrieb Marco=20 Cadeddu:
Hello Tom,
 
although the TS950SD is in my my = shack since=20 1991..I never made the modification for general tx coverage. I don't = think=20 it can transmit on 500 kHz if you carry out the mod, but probably = could be=20 used as starting point unplugging the rear connection between driver = and PA=20 and replacing with a devoted external PA (I'm using this rig in such = way to=20 drive an external 137 kHz xvtr).
Just for info, I was disappointed = about the=20 frequency stability of TS950SD: a rock in reception (both direct on = 137k or=20 via the xvtr on the 10 MHz band) but on tx, although the PA was = cutted out,=20 not suitable for qrss with several Hz of drift...now I found a a = 10MHz Rb=20 oscillator that is used for LO on the xvrt and divided to 10 kHz to = control=20 the PLL via the rear input.
 
Let me know if you get a useful = signal from the=20 drive out socket on 470kHz.
 
73 de Marco. IK1HSS
----- Original Message ----- =
From:=20 DK1IS
To: rsgb_lf_group@blacksheep.org
Sent: Saturday, August 25, = 2012 3:14=20 PM
Subject: LF: Modifications = of Kenwood=20 TS 950 SD and TS 50 S

Hello dear LF-group,

does anyone have proven = experiences about
  • modification of TS 950 SD for transmitting CW on MF, perhaps = LF too=20 ("general coverage transmission" already realized)
  • the same for TS 50 S,=20
  • overriding the permanent ALC at TS 50 S ?
As = usual, there=20 were no answers on my inquiries to Kenwood - neither from the = German=20 office nor from Japan ;-)

Tu es 73,
Tom, DK1IS=20

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