X-GM-THRID: 1212230538371741419 X-Gmail-Labels: rsgb lf X-Gmail-Received: aab83ad0117704d7da8723e4089e823ee3e3d1c7 Delivered-To: daveyxm@gmail.com Received: by 10.64.249.16 with SMTP id w16cs112920qbh; Sun, 20 Aug 2006 04:25:30 -0700 (PDT) Received: by 10.49.29.2 with SMTP id g2mr6363828nfj; Sun, 20 Aug 2006 04:25:30 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id c10si1034362nfb.2006.08.20.04.25.29; Sun, 20 Aug 2006 04:25:30 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1GElNu-0004Dc-MR for rs_out_1@blacksheep.org; Sun, 20 Aug 2006 12:22:30 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1GElNu-0004DT-2b for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2006 12:22:30 +0100 Received: from smtpout0159.sc1.cp.net ([64.97.136.159] helo=n082.sc1.cp.net) by relay2.thorcom.net with esmtp (Exim 4.51) id 1GElNp-0004a8-CX for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2006 12:22:29 +0100 Received: from g3kev (62.252.204.155) by n082.sc1.cp.net (7.2.069.1) id 44CA3138002056E2 for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2006 11:18:49 +0000 Message-ID: <001501c6c44a$695092f0$9bccfc3e@g3kev> From: "hamilton mal" To: References: <002401c6c3c4$0832ef80$74be3b3e@fujitsu> Date: Sun, 20 Aug 2006 11:18:07 -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: -0.9 (/) X-Spam-Report: autolearn=disabled,AWL=-1.026,HTML_50_60=0.095,HTML_MESSAGE=0.001 Subject: LF: Re: TIP: modifiying X-tals Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C6C44A.50328530" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR 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: 6941 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C6C44A.50328530 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dick. My xtals are small sealed units, some are also enclosed in glass like = B7G tubes with the same base. These cannot be modified as you describe. The old larger types with a plate that can be removed are different. I was wondering how far they would pull with a capacitor in series etc. mal ----- Original Message -----=20 From: Dick=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, August 19, 2006 7:16 PM Subject: LF: TIP: modifiying X-tals For those who didn't know, use following 'trick' to tune your own = X-tal. (found it in a magazine from the VERON) Remove the metalcover and place the remains in an oscillator. Now it will oscillate on it's original frequency. Take an permant marker pen ("Edding, or similar) and put a little = stripe/line on the X-tal plate. You will notice that the frequency goes down a bit. Wait a little until the xyleen/alcohol or other stuff that's in the = paint has gone..... By adding more of the ink on the cristal, it will go lower in = frequency. However there is a limit, and there will be a point where the X-tal = will not start anymore. When there is to much ink/paint on the X-tal, you can remove it with = alcohol or something. In this way I managed to tune a 4433,619kHz X-tal down to 4406,4kHz, = which, divided by 16 give 275,4, which drives my rig. 275,4 divided by 2 is 137,7kHz! I think for this X-tal this is about the limit, maybe 40kHz down, but = that's probably it. But it works! A really nice thrick to get those odd X-tal frequencies! Dick, PA4VHF ------=_NextPart_000_0011_01C6C44A.50328530 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Dick.
 
My xtals are small sealed units, some = are also=20 enclosed in glass like B7G tubes with the same base. These cannot be = modified as=20 you describe.
The old larger types with a plate that = can be=20 removed are different.
I was wondering how far they would pull = with a=20 capacitor in series etc.
mal
 
----- Original Message -----
From:=20 Dick
Sent: Saturday, August 19, 2006 = 7:16=20 PM
Subject: LF: TIP: modifiying = X-tals

For those who didn't know, use = following 'trick'=20 to tune your own X-tal.  (found it in a magazine from the=20 VERON)
 
Remove the metalcover and place the = remains in an=20 oscillator.
Now it will oscillate on it's = original=20 frequency.
 
Take an permant marker pen ("Edding, = or similar)=20 and put a little stripe/line on the X-tal plate.
You will notice that the frequency = goes down a=20 bit.
Wait a little until the = xyleen/alcohol or other=20 stuff that's in the paint has gone.....
By adding more of the ink on the = cristal, it will=20 go lower in frequency.
However there is a limit, and there = will be a=20 point where the X-tal will not start anymore.
 
When there is to much ink/paint on = the X-tal, you=20 can remove it with alcohol or something.
 
In this way I managed to tune a = 4433,619kHz X-tal=20 down to 4406,4kHz, which, divided by 16 give 275,4, which drives my=20 rig.
275,4 divided by 2 is = 137,7kHz!
 
I think for this X-tal this is about = the limit,=20 maybe 40kHz down, but that's probably it.
 
But it works!
 
A really nice thrick to get those odd = X-tal=20 frequencies!
 
Dick,=20 PA4VHF
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