Re: Fw: LF: 475kHz crystal

["Klaus Hirschelmann" <k.hirschelmann@kabelmail.de>]

 

----- Original Message -----

From: M0FMT

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, January 08, 2013 11:04 AM

Subject: Re: Fw: LF: 475kHz crystal

Hi Klaus and group

 

He doesn't seem to have taken MF on board as far as I can see. May one of his rigs can be modified I have not checked my self.

 

He does mention the use of Si570 programable xtal. I have one on a board with set frequencies from a PIC and selected by binary from a dil switch. They will not operate as low as 500kc/s so they have to be divided with either a CD4040 or CD4060 or any other logic divider. However it gives stable selectable xtal frequencies. In this case it is probably worth going the extra mile and make up a DSS as the master oscillator which will give VFO coverage. I think your pays your money and takes you choice as they say....... hee.

 

Cheers Klaus.

73 es GL Pete M0FMT IO91UX

From: Klaus Hirschelmann <k.hirschelmann@kabelmail.de>
To: rsgb_lf_group@blacksheep.org
Sent: Tuesday, 8 January 2013, 8:53
Subject: Re: Fw: LF: 475kHz crystal

Hello

maybe we can bring http://www.hanssummers.com/ for also offering 630m-Band versions of his QRSS and WSPR kits.

.

Klaus, DJ7OO