Message-ID: <F181E4FA3ECB410489E8621F992DF861@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <002201c8eb19$ef21f930$0301a8c0@mal769a60aa920> <3652E16C8DF5458ABDD4D14CF2537C0A@AGB> <004a01c8eb5e$f72eed00$0301a8c0@mal769a60aa920> <18E35B939E2A4A418472A930207A288D@AGB> <001701c8ed07$d9f49d20$0900a8c0@AM>
Date: Wed, 23 Jul 2008 22:53:18 +0100
MIME-Version: 1.0
Importance: Normal
Subject: Re: LF: Re: Looking for  500 Khz xtal unit , any freq ,  inside 501 504 Khz , 
Content-Type: text/plain;
	format=flowed;
	charset="iso-8859-1";
	reply-type=original
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org


Ok Alan

Its been a long time since i used anything like this ! , used to  watch G3SX 
etching xtal's  with a bath of hydrofloric  acid and a bc221 , think  FT840 
or something like that or 480 , small unit that the front plate came off . 
ive edge ground them on a finishing oil stone , never used vim , dose that 
remove side bands ? :)

Any 'big' rock will do , I think  I have a 500 Khz unit , which would grind 
'hf'  but would not like to make a mess of it , better , see if I can find 
one 'in band' size is not a problem ...

Tnx - G ..






--------------------------------------------------
From: "Alan Melia" <alan.melia@btinternet.com>
Sent: Wednesday, July 23, 2008 10:05 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: LF: Re: Looking for  500 Khz xtal unit , any freq ,  inside 501 504 
Khz ,

> Hi Graham 500khz crystals are quite difficult to make and certainly you
> wount fine one in a smaller package than HC6/U as far as I remember. There
> are some 10X series rocks that were used in one of the frequency 
> calibrators
> (No 10 I think) They will need chasing up a little with some "scouring
> powder". I think that is probably the best bet.....good luck finding
> one...... I have one but its part of my crystal collection so not for sale
> :-))
>
> I have seen 453.xx kHz crystals in HC6/U but never come across any 500kHz.
> You could always put a 500kHz ceramic resonator inside an HC6/U case !!
>
> Cheers de Alan G3NYK
>
>
> ----- Original Message -----
> From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Wednesday, July 23, 2008 9:14 PM
> Subject: LF: Looking for 500 Khz xtal unit , any freq , inside 501 504 Khz 
> ,
>
>
> Looking for  500 Khz xtal unit , any freq ,  inside 501 504 Khz ,
>
> Pref round  502 KHz , fundamental,  needs to  be a 'big' one , for a 
> valve
> oscillator  !
>
> I assume hc6u would be ok  or bigger , these look to  be the right type !
>
> http://hipme.com/weblogs/wa5znu/20050302210827/xtals.jpg
>
> Tnx - G ..
>
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com
> Version: 8.0.138 / Virus Database: 270.5.5/1569 - Release Date: 7/23/2008 
> 13:31
>
>
>