[Lowfer] GPS frequency lock (and ZL1BPU DDS exciter)

[Larry Putman]

Lyle,

Can you me a rough guessimate of the total cost
of the exciter project(1 exciter) for all parts needed
purchased new? Not using any junk box parts.

73

Larry


----- Original Message -----
From: "Lyle Koehler" <lyle@mlecmn.net>
To: <lowfer@mailman.qth.net>
Sent: Monday, November 11, 2002 1:32 PM
Subject: Re: [Lowfer] GPS frequency lock (and ZL1BPU DDS exciter)


> I looked at the index of the Digi-Key catalog, and found that they have
> TCXOs in stock for several frequencies, including 10.0 and 12.8 MHz (part
> numbers X493CT and X489CT). The price is about $15, which makes them an
> attractive alternative to a high-quality crystal with a PTC thermistor.
> These units are also voltage-controlled, which means that they can be used
> in a GPS-disciplined circuit. Only problem is that they are surface mount,
> although with only 4 pins on a DIP-8 sized package, I can probably cope
with
> the soldering...
>
> I'm getting ready to order the parts for the ZL1BPU DDS exciter, and am
> willing to order extra sets of the major parts (microprocessor, TDA7052A,
> CD4060, 78L05, precision resistors and TCXO) for other US LowFERs who are
> interested in the project. Maybe that way we can share the darned
> shipping/handling charges. I could probably break even at something under
> $30 (postpaid) for the above-mentioned parts. Exact cost will depend on
the
> quantity -- some of the parts will have a price break for quantities of 10
> or more -- but I *definitely* don't want to get into the parts business
and
> would want to limit the offer to the first 10 people who respond. The
ZL1BPU
> exciter is pretty simple, but it is *not* a beginner-level project, and no
> PC boards are available. However, I am willing to load the firmware into
the
> AVR microprocessor, which means you don't have to buy it from Murray (he
> says that's OK). You will still need a serial PC interface and software to
> run the exciter, but that software is free. Details of the exciter are at
> http://www.qsl.net/zl1bpu/micro/EXCITER/Index.htm   Anyone interested?
>
> Lyle, K0LR
>
> Lyle, K0LR
>
>
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