Base Station

[KDN]

What is the highest power UHF base station available?

I know that the Quantar is available in 110 watts, how about the mastr III, do they support any higher power?

[Jim202]

You might want to provide some other info so maybe some suggestions can be made.

Like what type of use will the base station be used for? Intermittent use or continuous.

What source power is available? 120 Vac, 240 Vac, single or 3 phase?

What type of modulation will be used? Wide-band, narrow-band, etc?

How many channels? Single channel, multi channel?

Local control or tone remote control?

What type of environment? Hot, cold, dusty, moist?

What type of cabinet is required? Open, closed, relay rack style, lockable?

As you can see there are a multitude of choices that will effect just what this high
powered base station will consist of. Not trying to be a hard nose, but these are just
normal questions that should be asked for any installation of a radio.

Jim

What is the highest power UHF base station available?

I know that the Quantar is available in 110 watts, how about the mastr III, do they support any higher power?

[Dan562]

There's a UHF Quantar with a High Power Amplifier 225 Watts Output but generally it's an In-Bound Signal problem from the Subscriber units that will pose the Path Loss signal problems back to the Base Station's receiver.

Jim202 is correct by asking his valid questions on how the Base Station will be used.

[RKG]

An out-of-the-box MastrIII max's at 110 watts.

[KDN]

> Like what type of use will the base station be used for? Intermittent use or continuous.

use of the channel will be a county dispatch center fire dispatch/operations channel

> What source power is available? 120 Vac, 240 Vac, single or 3 phase?

this will be at a high profile tower site, power is really not a problem

> What type of modulation will be used? Wide-band, narrow-band, etc?

channel will be wide band

> How many channels? Single channel, multi channel?

singe channel

> Local control or tone remote control?

tone remote control into dispatch center

> What type of environment? Hot, cold, dusty, moist?

unit will go into a climate controlled building at a tower site

> What type of cabinet is required? Open, closed, relay rack style, lockable?

cabinet will most likly be a rack style, locing does not matter as the site is locked and montiored 24/7

> Thanks for the help...

[UPPER CASING all your typing is not only rude but difficult to read. Don't do it again - akardam]

[Jim202]

With all that said, I would go look at the license that this station will be operated
under. If the site is already on the license, the power will be on the license, either
in power out in watts or in ERP.

If the site is not under the current license, you will have to modify the license. In
most cases, the frequency coordinator will lower (reduce) the current power and
limit the ERP from the new location.

Bottom line, I would not expect to even see 110 watts authorized on any new
location. Unless your out in the middle of the plains, your probably not going
to be authorized the full 110 watts that you use to be able to get. There are
other users on the frequency that you WILL effect with high power. Especially
if you have a high HAAT location. In this case the power will be even lower.

High power today on a new or modified license is a far fetched dream now.

Good luck on your quest. Settle for at max a 110 watt base station and a
5.2 db gain antenna at the max. More than likely you will end up with
something like 50 or 60 watts ERP. That is the output power at the antenna
with the antenna gain and coax cable loss already figured in.

Jim

[nmfire10]

We recently requested a boost in power. The coordinated sent it back with this ludicrous key-shaped antenna radiation pattern that would have cost us about $8,000 to implement. Needless to say, we decided to make do with 50 watts and withdraw the application.

[Grog]

The county south of me had a BOOMING signal on VHI-hi, they switched the same frequency to narrowband with a repeater. The license came back with much lower power, and they have multiple TX sites and it still sounds weak in some parts of the county, nevermind two counties over like it used to be heard. The comm center guy said they should have waited to be forced to switch instead of being proactive.

[KDN]

It is a UHF Frequency licensed at 300W 500EPR....

[nmfire10]

It is a UHF Frequency licensed at 300W 500EPR....

Where? How? And the 10 million dollar questions... WHY?

[psapengineer]

You could use this product line to boost your power out:

http://www.tplcom.com/hmsseries.html

Now, just in an attempt at humor, who is the serving power utility, I'd like to buy stock options......

This would also likely allow for fallback to lower power out if the PA fails by running on just the 45W output of the base station itself.


Regards, Bob