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 <
[email protected]>:
> 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 ...
> £2-95/unit
>
15.01875MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab
...
> £2-95/unit
> 15.0222MHz HC18/U wire end, Fund, Par Res,
30pF load C, Std Freq Stab ...
> £2-95/unit
> 15.02246MHz HC6/U
pin end, Glassholder, Fund, Par Res, 30pF load C, Good
> Freq Stab ...
£3-95/unit
> 15.0865MHz HC25/U pin end, Fund, Par Res, 30pF load C,
Std Freq Stab ...
> £2-95/unit
> 15.1125MHz HC18/U wire end,
Fund, Par Res, 30pF load C, Std Freq Stab ...
> £2-95/unit
>
15.12084MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab
...
> £2-95/unit
> 15.128MHz HC6/U pin end, Fund, Par Res, 30pF
load C, Std Freq Stab ...
> £2-95/unit
> 15.150MHz HC18/U wire
end, Fund, Par Res, 30pF load C, Std Freq Stab ...
>
£2-95/unit
> 15.1515MHz HC18/U wire end, Fund, Par Res, 30pF load C,
Std Freq Stab ...
> £2-95/unit
> 15.1792MHz HC6/U pin end, Fund,
Par Res, 30pF load C, Std Freq Stab ...
> £2-95/unit
> 15.200MHz
HC49/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab ....
>
£3-25/unit
> 15.2125MHz HC6/U pin end, Fund, Par Res, 30pF load C, Std
Freq Stab ...
> £2-95/unit
> 15.2209MHz HC6/U pin end, Fund, Par
Res, 30pF load C, Std Freq Stab ...
> £2-95/unit
> 15.2209MHz
HC25/U pin end, Fund, Par Res, 30pF load C, Std Freq Stab ....
>
£2-95/unit
> 15.225MHz HC49/U wire end, Fund, Par Res, 30pF load C,
Std Freq Stab ...
> £3-25/unit
> 15.2292MHz HC25/U pin end,
Fund, Par Res, 30pF load C, Std Freq Stab ...
> £2-95/unit
>
15.24074MHz HC18/U wire end, Fund, Par Res, 30pF load C, Std Freq Stab
...
> £2-95/unit
> 15.250MHz HC49/U wire end, Fund, Par Res,
30pF load C, Std Freq Stab ...
> £3-25/unit
> 15.26875MHz HC18/U
wire end, Fund, Par Res, 30pF load C, Std Freq Stab ...
>
£2-95/unit
> 15.275MHz HC49/U wire end, Fund, Par Res, 30pF load C,
Std Freq Stab ...
> £3-25/unit
> 15.2963MHz HC25/U pin end,
Fund, Par Res, 30pF load C, Std Freq Stab ...
>
£2-95/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 £2-50 1st Class Airmail.
> Send to:-
> Vincent
Jakomin
> 69 Angus Close
> CHESSINGTON
> Surtrey KT9
2BN
> vincent jakomin <
[email protected]>;
>
>
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 <
[email protected]>
> To:
[email protected]>
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-HC49U-/320828846717?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item4ab2e3b27d>
>
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
>
>
>
>
>
>
>
