Hi Pete,
the problem with a .hex file is that it will contain my callsign, not
yours! You will need to compile your own, however, if that's what
stops you from making a transmitter or a general purpose QRSS3 keyer
like this, I could program a 12F675 pic with your details and send it
to you. Or, if you have a pic programmer, I could compile the code and
produce a .hex with your call. Or, I can just send you the code and
you can modify it to suit your needs :-) Let me know.
It's funny, my 807 transmitter combines "hollow state" technology,
microcontrollers (keyer) and DDS (VFO) :-) Oh, I use an IRF720 to key
the 807 (cathode keying is tricky), I think I could eeeasily get 20 W
out of the IRF720 in class D/E. But that wouldn't be fun!
73, Dimitris VK1SV
2013/1/8 M0FMT <[email protected]>:
> Thanks for the info Dimitrios.
>
> Please let the list know when you have got something with that rig design it
> sounds good. I hope you will publish the HEX code for the PIC as I can
> program the chips so long as I have it. Its my biggest gripe that PIC
> projects leave you high and dry without the HEX code.
>
> However I like the idea of the little rig. I will get an e bay xtal as well
> .... great stuff!!
>
> Here I have a series of tube QRP rigs 160/80 CW AM FM FSK xtal/VFO and a
> 10meter CW FSK xtal 28.060 and a 600m rig 6.500-6.000=0.5 xtal mixer vxo
> which is now modified for 472/9 all based around 12ax7 6au6 and 6CL6 pa. The
> 630m version is now modified with yet another 12AX7 to carrier controlled
> screen ac couple AM modulation. Yes we are playing with QRP AM on 630m it
> doesn't have much range but is OK cross town but we are aware of other 630m
> users.
> 73 es GL Pete M0FMT IO91UX
>
> From: Dimitrios Tsifakis <[email protected]>
> To: [email protected]
> Sent: Monday, 7 January 2013, 21:17
> Subject: Re: Fw: LF: 475kHz crystal
>
> 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
>>
>>
>>
>>
>>
>>
>>
>
>
>
|
