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Date: Tue, 8 Jan 2013 08:17:42 +1100
Message-ID: <CAKvcm2e=6D+3kfUgro7nWYSF2onDXJ0SxP=kJh38kR+N0hEBxg@mail.gmail.com>
From: Dimitrios Tsifakis <dtsifakis@gmail.com>
To: rsgb_lf_group@blacksheep.org
Subject: Re: Fw: LF: 475kHz crystal
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Hi Pete,

It's always good to know there is a decent and reliable (and not
expensive!) crystal seller!

By the way, I noticed that since I posted this message, about half a
dozen 15200 kHz crystals were sold on eBay. Shall we be looking for
for some 475 kHz signals in the near future? :-) I am planning to
produce the simplest transmitter ever for 475 kHz and put the write-up
in my web page. So far, this is the idea: A PIC ('cause I have plenty)
produces the QRSS keying. It connects to the reset pin of a 74HC4060.
There is a xtal oscillator on the 74HC4060 using the 15.2 MHz xtal.
The output feeds a logic-level gate MOSFET. At this stage I am looking
for a suitable MOSFET that can be driven directly by 5 V. There are
plenty out there, any suggestions are welcome!


Here in Oz, and while we wait for the international community to
produce a band plan, we decided to concentrate all our activities on
475 kHz for QRSS/Digital and 473 for normal CW. Given the transmitting
station density, it's perfectly OK to have QRSS signal mixed up with
WSPR signals here. In fact, it is desirable to do that, as with a
whopping 7 kHz of space, sub-noise signals are like the proverbial
needle in the haystack.

73, Dimitris VK1SV

2013/1/8 M0FMT <m0fmt@yahoo.co.uk>:
> Hi Dimitrios
>
> Sorry my lovely chart will not go through blacksheep so here is the raw
> list..
>
> Thks fr enquiry Peter
> OK have flwg ex-stock:-
> 15.010MHz HC6/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.01875MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ..=
.
> =A32-95/unit
> 15.0222MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.02246MHz HC6/U pin end, Glassholder, Fund, Par Res, 30pF load C, Good
> Freq Stab ... =A33-95/unit
> 15.0865MHz HC25/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.1125MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.12084MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ..=
.
> =A32-95/unit
> 15.128MHz HC6/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.150MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.1515MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.1792MHz HC6/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.200MHz HC49/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A33-25/unit
> 15.2125MHz HC6/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.2209MHz HC6/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.2209MHz HC25/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.225MHz HC49/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A33-25/unit
> 15.2292MHz HC25/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
> 15.24074MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ..=
.
> =A32-95/unit
> 15.250MHz HC49/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A33-25/unit
> 15.26875MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ..=
.
> =A32-95/unit
> 15.275MHz HC49/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A33-25/unit
> 15.2963MHz HC25/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ...
> =A32-95/unit
>
>
>
> Hi Dimitrios
>
> See attached list of 15meg xtals with prices from Vincent Jakomin a
> thoroughly good guy!! No, no shares in his company.
> For Europe p&p is =A32-50 1st Class Airmail.
> Send to:-
> Vincent Jakomin
> 69 Angus Close
> CHESSINGTON
> Surtrey KT9 2BN
> vincent jakomin <vincentvoy@hotmail.co.uk>;
>
> Not sure if the Blacksheep will handle a file of 350kb so copy direct as
> well.
>
> Good luck
> 73 es GL Pete M0FMT IO91UX
>
> From: Dimitrios Tsifakis <dtsifakis@gmail.com>
> To: rsgb_lf_group@blacksheep.org
> Sent: Monday, 7 January 2013, 5:24
> Subject: LF: 475kHz crystal
>
> Hello LF/MF group,
>
> I though this may be of interest to those what would like to build the
> simplest transmitter possible for MF.
>
> I found these cheap crystals on eBay:
>
> http://www.ebay.com.au/itm/2-PCS-15200-KHz-HC-49-U-X-TAL-Bargain-Pack-HC4=
9U-/320828846717?pt=3DUK_BOI_Electrical_Components_Supplies_ET&hash=3Ditem4=
ab2e3b27d
>
> They are 15200 kHz which can be conveniently used with a 74HC4060 to
> make an oscillator, then connect to the divide_by_32 line for a nice,
> stable 475 kHz signal. You can then drive a class-E FET PA for any
> kind of power you like.
>
> 73, Dimitris VK1SV
>
>
>
>
>
>
>