Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 152BA38000101; Thu, 11 Apr 2013 06:54:04 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1UQF7a-0003hg-9h for rs_out_1@blacksheep.org; Thu, 11 Apr 2013 11:52:50 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1UQF7Z-0003hX-LN for rsgb_lf_group@blacksheep.org; Thu, 11 Apr 2013 11:52:49 +0100 Received: from smtpout1.wanadoo.co.uk ([80.12.242.29] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1UQF7U-0003V4-SG for rsgb_lf_group@blacksheep.org; Thu, 11 Apr 2013 11:52:48 +0100 Received: from AGB ([2.26.46.106]) by mwinf5d08 with ME id NasP1l00D2HTF3W03asPyP; Thu, 11 Apr 2013 12:52:24 +0200 Message-ID: <7B14049AB0084B3EB5BA4E6BB153ECB8@AGB> From: "Graham" To: References: <0D5F8C81FCD24061BCDE1F5E2C9785E7@AGB> <1365633794.18069.YahooMailNeo@web133204.mail.ir2.yahoo.com> <1365673624.52897.YahooMailNeo@web133204.mail.ir2.yahoo.com> In-Reply-To: <1365673624.52897.YahooMailNeo@web133204.mail.ir2.yahoo.com> Date: Thu, 11 Apr 2013 11:52:23 +0100 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: 2.2 (++) 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: R Pete Well , its possible to use the emergency vfo , but that results in a very unstable signal , I remember down the Tottenham court road , there where tea chests of crystals , but that was 1970 .. seems a lot of the traditional firms have closed , [...] Content analysis details: (2.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.29 listed in list.dnswl.org] 2.2 TVD_SUBJ_ACC_NUM Subject has spammy looking monetary reference 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 03611e5ac7d3498d5891f08d3655033a Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz Content-Type: multipart/alternative; boundary="----=_NextPart_000_004E_01CE36AB.07ABF320" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: *** X-Spam-Status: No, hits=3.4 required=5.0 tests=AMATEUR_PORN,HTML_40_50, 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: 3039ac1d60ce5166964c2d61 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_004E_01CE36AB.07ABF320 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable R Pete=20 Well , its possible to use the emergency vfo , but that results in = a very unstable signal , I remember down the Tottenham court road = , there where tea chests of crystals , but that was 1970 .. seems = a lot of the traditional firms have closed ,=20 One of the =A35 dds with a driver would work , but they want to = keep it standard=20 DS - That's really the 'correct' situation , that -33 db decode, = -3 db lower than normal was a good indication that the system = is working , over ranging the a/d is the only problem . I think = dynamic range is 60 d b after processing , is it 3 db per bit ? = 8 bits , 24 db + 3 that's 27 dB ? 500:1 ? , but by removing = qty 2 mixers and 2 oscillators , [ may be 3 oscillators 1 , = hf-up-conv 2 , pll conv osc 3 ref osc ) that is a lot of noise = + jitter removed from the signal path as well as imd from 2 = mixers , I found a attenuator helped for mw and I have a = mw-filter , which cleaned up sw bands ...... nice to have a = panoramic display , 2 mhz this time , the ra17 was 1 mhz and 28 = valves + 20 ish > in the radio =20 73-G. From: M0FMT=20 Sent: Thursday, April 11, 2013 10:47 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz=20 OK Graham Thought it was home brew retro.......... I am in that mode and think = everbody else is! What do you do at the moment inject a Sig Genny? Have you checked the net or checked out Vincent - QuartzLab etc?=20 Anyway what's that master osc circuit. I build from old RADCOM (pre 1975 = when they published real amateur radio) and PW,QST etal. I use modern = xtals with no known issues. Well trying to get third overtone for 10m = not to chirp is an issue with me at the moment.=20 OK yes got a stick on its way didn't want to tear up my existing = upconverter design. But not sure there is much wrong with the UC = approach it works for me. But want to try the direct approach. Do you = get much Cross mod and IM products? 73 es GL Pete M0FMT IO91UX From: Graham To: rsgb_lf_group@blacksheep.org=20 Sent: Thursday, 11 April 2013, 0:47 Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz=20 Ok Pete=20 Q where to have them made ?=20 The set , Marconi Ocean span 1950's valve tx needs the big = rock's as the oscillator pass's quite a lot of power via them = ...hc6u are no good , drive level is very low - the ones fitted are = the wired- gold flashed ones , so cannot etch into the band ...=20 the gang want to keep it standard=20 73 -G.=20 Ps waiting for qty-3 =A36 dongles : ) From: M0FMT=20 Sent: Wednesday, April 10, 2013 11:43 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz=20 Hi=20 If you want to spend a small fortune get them cut. However build a = Mixer VXO from El cheapo standard xtals and or old PMR rocks. Then at = your next rally buy a couple of Screw together 10xj or FT243 rocks of = any frequency and put the El-cheapo xtals inside. And Hey Presto you = have Retro rocks. I have a small all valve 472 tx that uses 6.00 -6.472=3D0.472 vxo-able = a couple of kc/s 12ax7-6am6-6cl6=3D 4wattso/p. Local QRP rig. Hope this helps 73 es GL Pete M0FMT IO91UX From: Graham To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, 10 April 2013, 20:30 Subject: LF: Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz=20 Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz =20 Q Is there any manufacture of crystals in this range ? Or Surplus items available =20 QTY 1 or 2 off =20 TNX- Graham G0NBD ------=_NextPart_000_004E_01CE36AB.07ABF320 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
R Pete
 
Well , its possible to  use the  emergency  = vfo  , but=20 that  results  in a very  unstable  signal , = I  =20 remember  down the  Tottenham court road , there  = where  tea=20 chests of  crystals , but that  was  1970 .. seems  = a =20 lot  of the  traditional  firms have  closed , =
 
One  of the  =A35  dds  with  a = driver =20 would  work , but  they  want to  keep  = it =20 standard
 
DS -   That's really  the  'correct' =20 situation  ,  that  -33 db decode, -3 db  lower = than  normal  was  a  good  indication  =20 that  the  system  is  working = ,   over=20 ranging  the  a/d  is the  only  problem . I=20 think  dynamic  range is  60 d b after  = processing  ,=20 is it   3 db per  bit  ?  8 bits  , = 24  db +=20 3   that's   27 dB ?  500:1 ?   , = but  =20 by  removing    qty  2  mixers   = and  2  oscillators   , [ may  be 3 =20 oscillators  1 , hf-up-conv  2 , pll  conv osc  = 3  ref=20 osc )  that  is a  lot  of  noise + = jitter =20 removed  from the  signal  path as well  = as  =20 imd  from  2  mixers , I found  a attenuator =20 helped  for  mw  and  I have  a  = mw-filter  ,=20 which  cleaned  up  sw  bands  ......  = nice=20 to  have a  panoramic  display , 2  mhz this time ,=20 the  ra17  was 1 mhz  and   28  valves + = 20 ish=20  > in the  radio   
 
73-G.
 

From: M0FMT
Sent: Thursday, April 11, 2013 10:47 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 = 236.75 KHz=20

OK Graham
 
Thought it was home brew retro.......... I am in that mode = and think=20 everbody else is! What do you do at the moment inject a Sig = Genny?
 
Have you checked the net or checked out Vincent - = QuartzLab etc?=20
 
Anyway what's that master osc circuit. I build from old = RADCOM (pre=20 1975 when they published real amateur radio) and PW,QST etal. I use = modern xtals=20 with no known issues. Well trying to get third overtone for 10m not to = chirp is=20 an issue with me at the moment. 
 
OK yes got a stick on its way didn't want to tear up my = existing=20 upconverter design. But not sure there is much wrong with the UC = approach it=20 works for me. But want to try the direct approach. Do you get much Cross = mod and=20 IM products?

73 es GL Pete M0FMT IO91UX
From: = Graham=20 <g8fzk@g8fzk.fsnet.co.uk>
To: = rsgb_lf_group@blacksheep.org=20
Sent: Thursday, 11 = April=20 2013, 0:47
Subject: = Re: LF:=20 Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz

Ok Pete
 
Q where to  have  them  made  ?
 
The  set  , Marconi  Ocean span 1950's  = valve =20 tx   needs  the  big  rock's  as = the =20 oscillator  pass's   quite a  lot  of =20 power  via them ...hc6u  are  no  good  , = drive level=20 is very low - the ones fitted  are the wired- gold =20 flashed  ones  , so  cannot  etch  into = the =20 band ...
 
the  gang  want  to  keep  it  = standard=20
 
73 -G.
 
Ps  waiting  for  qty-3  =A36   = dongles :=20 )

From: M0FMT
Sent: Wednesday, April 10, 2013 11:43 PM
To: rsgb_lf_group@blacksheep.= org=20
Subject: Re: LF: Wanted 10XJ or FT243 XTALS Range 236.25 = 236.75=20 KHz

Hi
 
If you want to spend a small fortune get them cut. However = build a=20 Mixer VXO from El cheapo standard xtals and or old PMR rocks. Then at = your=20 next rally buy a couple of Screw together 10xj or FT243 rocks of any = frequency=20 and put the El-cheapo xtals inside. And Hey Presto you have Retro=20 rocks.
I have a small all valve 472 tx that uses 6.00 = -6.472=3D0.472=20 vxo-able a couple of kc/s 12ax7-6am6-6cl6=3D 4wattso/p. Local QRP=20 rig.
Hope this helps
 
73 es GL Pete M0FMT IO91UX
From: Graham=20 <g8fzk@g8fzk.fsnet.co.uk>
To: = rsgb_lf_group@blacksheep.org=20
Sent: Wednesday, = 10 April=20 2013, 20:30
Subject: LF:=20 Wanted 10XJ or FT243 XTALS Range 236.25 236.75 KHz

Wanted  10XJ  or  FT243  XTALS  =20 Range   236.25    236.75 =20 KHz   
 
Q  Is there  any  manufacture  = of  =20 crystals  in this  range  ?
 
Or  Surplus    items   = available =20
 
QTY 1  or  2  off 
 
TNX- Graham
 
=
G0NBD


=


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