I did talk to him about it, and it could be a possibility. I don't think
they would be able to offer it in kit form. The company I work for is an
engineering and consulting firm, so they are not really set up for this kind
of thing. In order to provide a kit, you really need to be able to provide
strong support in the event of mishaps. The AD607 is a very fine pitch part
(.0267 pin to pin spacing), and it isn't easy to mount without using a
stereo microscope to check the connections. A very fine soldering tip is
required, with .010 size solder.
I will be glad to send you the schematic if you are interested.
Pete
starman wrote in message
...
Pete KE9OA wrote:
starman wrote in message
...
Pete,
Have you heard anything about how this receiver will be marketed? Is
there a distributor on board?
Hi,
We may market this unit ourselves. I contacted both Universal
and
Grove, and the responses from both of them were lukewarm. I am the new
kid
on the block, so they don't know anything about me, so I can't really
blame
them for their lack of interest. I don't think that we will need anybody
for
a distribution network, but who knows? Our company is doing a good job
selling out current products through our website.
Anyway, if any of you have the XM Satellite receivers, they are using
the
AD607s, so you can get an idea of the recovered audio quality. I did
some
listening to the detector last night, and where the envelope detector
was
clearly exhibiting distortion on faded signals, the sync detector
maintained
clean audio quality almost all the way down into the noise level. Once
the
signal almost completely faded out, there was some distortion, but it
was
very minimal. The AD607 recovers is less than 20uSec, so settling time
is
not an issue. I still would like to eliminate the slight modulation I am
seeing on the limited signal; once this is done, I will be able to
narrow
the loop bandwidth. If it is too narrow, the system will go out of lock
on
modulation peaks.
Right now, I have the loop bandwidth set at 58kHz, and the system is
super
clean. Still needs some work, but I am very close.
Pete
I'm starting to get enthusiastic about the possibility of your sync'
detector being available as an outboard unit, maybe as a kit too. It
would be nice to have a more reasonably priced one than the
Sherwood-SE3. Hope you can sell the idea to your boss.
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