I have a mirage dual band amp that works on 2 meter and 440 MHZ.
I used to use it some time ago with my HT in the car. Ever since
I bought a Kenwood TMV71A dual band rig, I use that both as a
base radio and in the mobile on long trips because it has more
power than the mirage and is not much larger then the Mirage
either. 73, Jim WA6EKS
----- Original Message -----
From: John Miller <[log in to unmask]
To: [log in to unmask]
Date sent: Mon, 1 Dec 2014 07:33:24 -0500
Subject: Re: power amplifiers
I would just go the mobile route if I were you. No point
spending as much on
an amplifier as you can get an inexpensive mobile for.
----- Original Message -----
From: "Ashley Bernard" <[log in to unmask]
To: <[log in to unmask]
Sent: Monday, December 01, 2014 6:20 AM
Subject: Re: power amplifiers
This is great information. I=E2=80=99m starting to wonder with
all the =
fuss and expense to get this to work if I might just be better
off =
biting the bullet and putting the money into a mobile haha.
After all =
that=E2=80=99s essentially what I=E2=80=99m trying to accomplish
is =
mobile radio-like capabilities.
On Nov 30, 2014, at 6:36 PM, Colin McDonald
<[log in to unmask]> =
wrote:
=20
Ok.
So, you want to have the least amount of adapters in the signal
path =
because=20
each time you introduce an adapter, you lose RF power.
If the Mirage bd-35 has a BNC connecter on the input, you want
to get =
a coax=20
jumper cable, a length of your choosing, with an SMA male on one
end, =
and a=20
BNC male on the other. If the Mirage amp has an so239/UHF
Female =
connecter=20
for the input, you want to have a coax jumper with an SMA male
for the =
radio=20
end, and a PL259 or UHF male on the other end.
I am going to make an educated guess and say that the antenna
jack on =
the=20
amp is an so239 connecter, so the pl259 that is on the end of
the =
antenna=20
coax will fit without any adapter.
If I were you, I'd try to find a piece of jumper coax, about 3
feet =
long and=20
have it made from RG174 coax. This coax cable is thin and
flexible =
and will=20
yield little loss over 3 feet.
Also, a thinner coax cable like rg174 will put allot less strain
on =
the=20
radios SMA connecter...a well known problem with the SMA
connecters on =
the=20
TH F6A is that they tend to break inside if allot of strain is
put on =
them=20
over a period of time...IE a thicker stiffer piece of coax with
an =
adapter=20
on it...
=20
Hope that helps
=20
73
Colin, V A6BKX
-----Original Message-----=20
From: Ashley Bernard
Sent: Sunday, November 30, 2014 4:24 PM
To: [log in to unmask]
Subject: Re: power amplifiers
=20
I have an adapter that goes on the end of the cable so it can
hook =
into =3D
the SMA port.
On Nov 30, 2014, at 6:21 PM, Colin McDonald
<[log in to unmask]> =
=3D
wrote:
=3D20
so are you using some kind of adapter to go from the SMA female
=3D
connecter on=3D20
the radio itself to the connecter on the end of the coax of the
=3D
antenna?
Or does the antenna coax have an SMA male on it already? I ask
=3D
because you=3D20
can buy mag mounts with either an SMA male, or a pl259 =3D
connecter...anyway,=3D20
you'll have to determine what you have and the type of jumper
cable =3D=
you'll=3D20
need.
=3D20
73
Colin, V A6BKX
-----Original Message-----=3D20
From: Ashley Bernard
Sent: Sunday, November 30, 2014 11:50 AM
To: [log in to unmask]
Subject: Re: power amplifiers
=3D20
Thanks. This is good info. that is indeed the amplifier =
I=3D3DE2=3D3D80=3D3D99=3D
m =3D3D
looking at. my primary radio is a kenwood thf6a. My antenna is
=
mounted =3D
=3D3D
on a high shelf near the window.
Thanks.
Ashley
=3D20
=3D20
On Nov 30, 2014, at 1:45 PM, Colin McDonald
<[log in to unmask]> =
=3D
=3D3D
wrote:
=3D3D20
is this the mirage BD-35 dual band amp listed for $199?
You need a power supply and a jumper cable to go from your radio
to =
=3D3D=3D
=20
the amp.=3D3D20
Also, check out what kind of connecters are on the amp so you
can =
=3D3D
order the=3D3D20
correct ends on the jumper cable for your HT and the amp's =
input=3D3D20
connecter...as well as to connect your antenna.
It doesn't indicate on the Mirage sight, at least not in the =
brief=3D3D20=3D
=20
description, what type of connecters are used for the input and
=3D3D
outputs on=3D3D20
the amp itself.
They are either BNC or so239 also known as UHF female
connecters.
I don't recall exactly what antenna and radio you are using, so
=3D3D
perhaps let=3D3D20
us know and then me or someone can let you know exactly what
coax =
=3D3D
jumper,=3D3D20
and cable ends you will need to hook everything up.
I agree though, that if you are using a magnetic mount antenna
=3D3D
indoors, that=3D3D20
45 watts output may be asking for trouble with both RFI issues,
as =
=3D3D
well as=3D3D20
safety issues being in close proximity to the radiating element.
Though, that said, many people use 45 or 50 watts in a mobile
with =3D=
the=3D3D20=3D3D
=3D20
antenna sitting on the roof of their vehicle 6 inches from their
=3D
head, =3D3D
so=3D3D20
it's probably not that big a deal.
Also, if you are using an indoor antenna, jumping to 45 watts
may =
not =3D
=3D3D
yield=3D3D20
the results you want, IE, getting into more distant repeaters or
=3D3D=
getting a=3D3D20
significantly better signal into the repeaters you already get
into.
You are dealing with allot of RF blockage inside a dorm building
=3D
and=3D3D20=3D3D
=3D20
sometimes increasing power doesn't fix the problem of poor
signals =
=3D3D
into the=3D3D20
repeater.
It may help a little, and if your antenna is near a window that
=
faces =3D
=3D3D
the=3D3D20
repeater you wish to get into more strongly, then the jump in
power =
=3D3D=3D
=20
will=3D3D20
help.
Just a couple things to consider is all.
=3D3D20
73
Colin, V A6BKX
-----Original Message-----=3D3D20
From: Ashley Bernard
Sent: Sunday, November 30, 2014 5:41 AM
To: [log in to unmask]
Subject: power amplifiers
=3D3D20
so, midst the chaos of after thanksgiving shopping, =3D
I=3D3D3DE2=3D3D3D80=3D3D3D99ve =3D3D
=3D3D3D
stumbled upon a power amplifier online. My only question is do
I =
need =3D
=3D3D
=3D3D3D
other devices to make this work? Of course I =
can=3D3D3DE2=3D3D3D80=3D3D3D99t =3D
=3D3D
exactly look =3D3D3D
at the setup figure to understand what I need to connect to =
what.=3D3D20
I=3D3D3DE2=3D3D3D80=3D3D3D99=3D3D3D
m guessing I need a power supply and a second line of coax
besides =
=3D3D
that =3D3D3D
from the antenna to the radio?
The power amplifier I=3D3D3DE2=3D3D3D80=3D3D3D99m looking into
is =
the =3D
mirage b35.
Thanks.
Ashley KC1CPS=3D3D3D=3D3D20=3D20=20
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