I know Kenwood, Icom and Motorola on a open format.
----- Original Message -----
From: Larry Horlick
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 25, 2010 10:51 AM
Subject: Re: [Repeater-Builder] Re: opinions for a public safety repeater
The digital side is Kenwood Nextedge, is it not? Does this mean that only
Kenwood mobiles can be used?
lh
On Thu, Mar 25, 2010 at 10:47 AM, Jed Barton <j...@jedbarton.com> wrote:
hmmm, tell me more about that one. Is that the combination analog /
digital?
Did the tkr750 go away?
-----Original Message-----
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Maire-Radios
Sent: Thursday, March 25, 2010 10:22 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: opinions for a public safety repeater
also there is the NXR-710 that replaces the TKR-750
----- Original Message -----
From: Maire-Radios <mailto:maire-rad...@verizon.net>
To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder@yahoogroups.com>
Sent: Thursday, March 25, 2010 9:56 AM
Subject: Re: [Repeater-Builder] Re: opinions for a public safety
repeater
look at the new version of the TKR-740 the NXR-700 repeater it
is the way to go and get the ver 2 software.
John
727-441-3250
----- Original Message -----
From: skipp025 <mailto:skipp...@yahoo.com>
To: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder@yahoogroups.com>
Sent: Thursday, March 25, 2010 8:37 AM
Subject: [Repeater-Builder] Re: opinions for a public safety
repeater
> "Jed Barton" <j...@...> wrote:
> Hey guys,
> Need some input here. I'm putting together a public safety
> repeater for my local FD. It's going to be really simple.
> Given the reliability factor, we're going with a Kenwood.
> Here's the million dollar question, i need some input. How
> about a kenwood tkr750 or a tkr740. I've run several 750s
with
> great results. I have not played with the 740, but i know
it
> has an amazing receiver, but yet only pushes a few watts.
> Any suggestions for a good amp, perhaps Cresend i think it
is.
> Thanks,
> Jed
Hi Jed,
The Kenwood TKR-750 and TKR-740 are both great Repeaters.
The
TKR-750 also has an amazing receiver. Proper setup of the
receiver
should normally include the front end pre-selector alignment
using a special coax cable jig assembly and a tracking
generator
properly configured and installed onto the PC-Board matching
input and RF sample port/jack.
Most people and Dealers tend to do the more casual "peak for
max
signal" method, which results in very usable but not the
absolute
best sensitivity and performance. I'm very much amazed how
many
repeaters we service with rather odd looking (on the test
equipment) "tweak and peak" front end alignment(s). So be
sure to
ask any Dealer what and how they prepare your equipment
before
they send it to you.
The TKR-750 is more of a self contained ready to use
repeater
with a lot of built in features. Very popular for operations
toward the 50 watt power level.
The TKR-740 is more of "system repeater" meaning... how many
owners
often use them with external Power Amplifiers and
Controllers. The
TKR-740 has much less power output and normal operation
assumed by
most people is to include an external RF Power Amplifier.
If you need to bark higher than a 50 watt signal onto the
air the
most popular method is to include (and use) an external RF
Amplifier.
You can save quite a bit of serious money by using the same
external
amplifier configuration with a TKR-750 Repeater and a higher
drive
(input) level External Amplifier. There's nothing in stone
about
driving an external high power RF Amplifier at the 25 to 50
watt
level compared to spending a lot more money on a low drive
level
amplifier. TPL, Cresend and TE can and will sell you higher
drive
amplifiers for much less money and you end up with pretty
much the
same end product. In the hopefully rare case where an
external
amplifier might fail, continued repeater operation at the
25-50
watt power level is quite usable versus the very low power
output
of the 740 repeater. There can be different advantages to
using
the TKR-750 or the TKR-740 Repeater.
cheers,
skipp
skipp025 at yahoo.com
www.radiowrench.com
