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Schematics for +/-12vdc power

Re: Revised goran's post

The Tellabs amps were known to be noisy. I think you've found your problem. May be reduce gain on the Tellabs and add another amp on the output?

I would be inclined to find a l11C or other good transformer to hang on the output of the Compellor, just to protect the output stage, though. (111C's can still be found in old installations--left there by telco. Chuck Leavens, in Pittsburgh, has a hook-up diagram on the net).
 
Re: Revised goran's post

> I'm half tempted to build a a directional wifi antenna,
> boost the output on this 802.11b ap I have, and do a
> microwave STL in the unlicensed spectrum...it's only a 3-4
> mile clear shot.

If you do that, let us know how it works! Particularly regarding link stability/interference. I'm might have similar challenge in the near future and the budget is not even close enough for something professional/licensed...


Regards,
Goran Tomas
 
Re: Revised goran's post

> I'm half tempted to build a a directional wifi antenna,
> boost the output on this 802.11b ap I have, and do a
> microwave STL in the unlicensed spectrum...it's only a 3-4
> mile clear shot. At least we'd have some ghetto internet
> access at the site :)
>

Ghetto Internet.....that's funny (BLEEP)!!!
Get some 3" PVC, some copper and go to town! How will you adapt the 802.11(b,a or g) to what you were trouble shooting? Just curious.
 
Re: Revised goran's post

> Get some 3" PVC, some copper and go to town! How will you
> adapt the 802.11(b,a or g) to what you were trouble
> shooting? Just curious.

If I built the antenna myself, I'd use a metal enclosure sized out to the wavelength, put some shielded coax into it and expose a multiple of the wavelength of copper inside the enclosure in a position so that the exposed antenna element catches the proper reflected wave off in the inside of the enclosure. To find a suitable cover, stick different shrink wraps in the microwave...if it gets hot, then it absorbs microwaves and you can't use it. I'd stick an amplifier on both ends...so if I could get like 10dB of gain on the passive antenna, plus the amp, it just may work. If that fails, stick an amp on a 15dBi directional yagi :)

The access point plugs directly into the network of the studio building. A PC on that end runs the Windows Media encoder, like that internet radio encoder from Spacial Audio since that doesn't require an external server to broadcast. The transmitter end has a network bridge with a PC running Windows Media Player that connects to the studio encoder. Depending on the quality of the network connection over the distance (1Mb - 11Mb...I wouldn't use 802.11g) you can send AMAZING digital quality down the line.

The only issue is it'd be unlicensed. Since wireless is encrypted, it's secure...but some kiddie can drown out the signal by amplifying his own AP on the same channel. I'm also unsure how the wireless equipment would react to a 20 year old 5kw leaky blowtorch next to it...and 2 80 meter antennae 100 yards away.

AudioTX has the STL-IP which is a hardware solution to what I'm trying to ghetto rig for free. Just needs the net connection.

I think we're moving the entire facility to VoIP very soon, so any play money is gone...but since I'm such a nerd, I might pay for this little endeavor myself just to see if it works.<P ID="signature">______________
</P>
 
Re: Revised goran's post

> > Get some 3" PVC, some copper and go to town! How will you
> > adapt the 802.11(b,a or g) to what you were trouble
> > shooting? Just curious.
>
> If I built the antenna myself, I'd use a metal enclosure
> sized out to the wavelength, put some shielded coax into it
> and expose a multiple of the wavelength of copper inside the
> enclosure in a position so that the exposed antenna element
> catches the proper reflected wave off in the inside of the
> enclosure. To find a suitable cover, stick different shrink
> wraps in the microwave...if it gets hot, then it absorbs
> microwaves and you can't use it. I'd stick an amplifier on
> both ends...so if I could get like 10dB of gain on the
> passive antenna, plus the amp, it just may work. If that
> fails, stick an amp on a 15dBi directional yagi :)
>
> The access point plugs directly into the network of the
> studio building. A PC on that end runs the Windows Media
> encoder, like that internet radio encoder from Spacial Audio
> since that doesn't require an external server to broadcast.
> The transmitter end has a network bridge with a PC running
> Windows Media Player that connects to the studio encoder.
> Depending on the quality of the network connection over the
> distance (1Mb - 11Mb...I wouldn't use 802.11g) you can send
> AMAZING digital quality down the line.
>
> The only issue is it'd be unlicensed. Since wireless is
> encrypted, it's secure...but some kiddie can drown out the
> signal by amplifying his own AP on the same channel. I'm
> also unsure how the wireless equipment would react to a 20
> year old 5kw leaky blowtorch next to it...and 2 80 meter
> antennae 100 yards away.
>
> AudioTX has the STL-IP which is a hardware solution to what
> I'm trying to ghetto rig for free. Just needs the net
> connection.
>
> I think we're moving the entire facility to VoIP very soon,
> so any play money is gone...but since I'm such a nerd, I
> might pay for this little endeavor myself just to see if it
> works.
>

Have you thought about taking your telco loop and putting a pair of DSL modems back-to-back on it? If your loop's not too long this might work (I've seen articles about ordering dry pairs/alarm circuits and using DSL modems that will bridge to deploy what essentially becomes an Ethernet bridge over 1.5MBit or 3MBit SDSL).

I'm assuming the telco loop is cheaper than a T1, otherwise you can use T1 STL systems.
 
Re: Revised goran's post

> Have you thought about taking your telco loop and putting a
> pair of DSL modems back-to-back on it? If your loop's not
> too long this might work (I've seen articles about ordering
> dry pairs/alarm circuits and using DSL modems that will
> bridge to deploy what essentially becomes an Ethernet bridge
> over 1.5MBit or 3MBit SDSL).

I have 2 Copperrocket SDSL modems from a few years back...but I have no way to unlock them and change their settings.

Are you sure a normal DSL modem will talk to the other without the DSLAM?<P ID="signature">______________
</P>
 
Re: Revised goran's post

> > Have you thought about taking your telco loop and putting
> a
> > pair of DSL modems back-to-back on it? If your loop's not
>
> > too long this might work (I've seen articles about
> ordering
> > dry pairs/alarm circuits and using DSL modems that will
> > bridge to deploy what essentially becomes an Ethernet
> bridge
> > over 1.5MBit or 3MBit SDSL).
>
> I have 2 Copperrocket SDSL modems from a few years
> back...but I have no way to unlock them and change their
> settings.
>
> Are you sure a normal DSL modem will talk to the other
> without the DSLAM?
>

You need modems that will work back-to-back without a DSLAM.
One example is the Pairgain 300.
https://www6.adc.com/ecom/hier?NODE=OND66876
 
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