Hello Doug
Pre amplifiers are nifty gadgets. In my email I am seeking some personal
references about this particular radio and a pre-amp which
may have been tried wioth some level of success.
When you start inserting GAIN ahead of a front end you have to be careful of
overloading the system and introducing
harful side effects.
In very densly congested sites ( lots o f transmitters ) you may havdet
ocomprimise the sensitivity of the reciever for selectivity.
Crystal filter may help - I have found using a receiver with a tight front end
and / or sufficient preselection will triumph over trying to make
a lesser piece of equipment work. Example a GE Mastr III is a super reciever -
In my case I am trying to set up a clients 2 recievers with a little additional
sensitivity - we are using this equipment in a remote site
away form other forms of interference ( boondock tower site ).
Some manufacturers are ARR and EMR - EMR makes a bi-polar amp with variable
gain.
ARR also has a fixed gain version -
ARR was very popular with GaS fet low noise stuff for 800 Mhz - used a lot of
them - exccellent results. Costs $100 thru $350
Best r egards
Ed Folta
Com/Rad INc
----- Original Message -----
From: Doug Hutchison
To: repeater-builder@yahoogroups.com
Sent: Thursday, July 29, 2010 12:30 PM
Subject: Re: [Repeater-Builder] Fw: TKR750 -Preamp
Where does one obtain these and at what cost?
Doug
On 29/07/2010 15:58:54, Ken Arck (ah...@ah6le.net) wrote:
> At 04:30 AM 7/29/2010, Com/Rad Inc wrote:
> >
> >ubject: TKR750 -Preamp
> >
> >Greetings Group
> >
> >Have any of you experimented with a RX pre-amp for the TKR 750
repeater?
> >
> >I am seeking results of actual trials of a product -
> >
> >Anyone care to comment on their experience(s) ?
> >
>
> <----We use AngleLinear PHEMT preamps all the time on TKR-
> 750's that
> we sell. They work very well without overloading the front end as
> many of the higher gain ones on the market do (generally, 12 to 15 dB
> is all that is needed in a receiver system, not the 20 to 24 dB some
> preamps deliver.
>
> Ken
>
> >
>
>
----------------------------------------------------------
> President and CTO - Arcom Communications
> Makers of repeater controllers and accessories.
> http://www.arcomcontrollers.com/
> Authorized Dealers for Kenwood and Telewave and
> we offer complete repeater packages!
> AH6LE/R - IRLP Node 3000
> http://www.irlp.net
> "We don't
> just make 'em. We use 'em!"
>
>
>
> ------------------------------------
>
>
>
> Yahoo! Groups Links
>
