RADIO SALES, SERVICING, CONSULTANCY, DESIGN

Satphones, Commercial, Amateur, CB, GPS, Marine Radio and Surveys

 

Shop/Office: 243 Seacombe Road, South Brighton, South Australia 5048

Postal: PO Box167, Brighton, South Australia, 5048

Shop Hours: Mon- Fri 9am-5:30pm Sat 9am-5pm

Tel/Fax: 08 8298 3906     International +61 8 8298 3906

Email: rfwizard@optusnet.com.au

ABN:20 428 966 535

For poor signal strength areas, or when trying to pull a low power TV station out of the noise (eg reception of a community TV broadcaster) a masthead amplifier can usually improve your reception. Why? Because the cable loss between your antenna and TV set has increased the noise figure of your receiving system. If you have a 20 metre cable run of RG6 from the antenna to the TV set, at UHF TV channel frequencies it amounts to around 4dB loss in the signal between the antenna and the TV set. The signal going into the TV set is then 4dB buried into the noise so you can never retrieve it with an amplifier at the TV set end. You need to boost the signal level before it goes into the cable and gets attenuated by the cable. But doesn't the noise get attenuated as well, you say? Unfortunately no. Because it is thermal noise at the input to the TV set and not external noise coming into the antenna. So just the signal is attenuated.

 

MHW24G

TV Masthead Amplifier for VHF/UHF antenna.  Screw to RG59 cable type.

$34.95 

$49.95 package with PSK06
   MHW24G
 
Freq
MHz
Gain
dB
inputs
Noise
Figure
dB
gain 
control
power
supply
Current
mA
FM
trap
dB
Pager
Filter
Output
dBuV
VHF
44-470
18
1
or
comb
<3
Tilt
14-10
GME
PSK06
or
PSK08
80
no
no
105
UHF
470-860
24
fixed
<3
NO
N/A
N/A

$19.95

Power supply 

240v to 14V DC @ 150mA

With PAL connectors for insertion in RG59 cable run.

 

Mount this near the TV set, plug the antenna cable into one jack and the TV into the other. The supply puts DC on the cable to the antenna to power the masthead amp. The TV set is DC isolated. Only the incoming boosted signal is passed to the TV set.

 

MHW24FE $39.95

MHW24FSE $54.95

TV Masthead Amplifier for VHF/UHF antenna. Shielded (FS) or non-shielded (F) models. F connector on RG6 or RG59 cable. 

MHW24FE$54.95 package with PSK06

MHW24FSE$69.95 package with PSK06

   MHW24FE & FSE
 
Freq
MHz
Gain
dB
inputs
Noise
Figure 
dB
gain 
control 
power 
supply
Current
mA
FM
trap
dB
Pager
Filter
Output
dBuV
VHF
44-470
22-24
1
or
comb
<2
10
GME
PSK06
or
PSK08
80
-25
no
105
UHF
470-860
24
<2.5
N/A
N/A

 

 

$19.95

Power supply 

240v to 14V DC @ 150mA

With F connectors for insertion in RG6 cable run.

 

Mount this near the TV set, plug the antenna cable into one jack and the TV into the other. The supply puts DC on the cable to the antenna to power the masthead amp. The TV set is DC isolated. Only the incoming boosted signal is passed to the TV set.

 

MHW38G

TV Masthead Amplifier for VHF/UHF antenna. Screw to RG59 or RG6 cable type

Notch filter to remove pager or amateur radio band interference. 

$64.95

$79.95 package with PSK06
   MHW38G
 
Freq
MHz
Gain
dB
inputs
Noise
Figure
dB
gain 
control
power
supply
Current
mA
FM
trap
dB
Pager
Filter
Output
dBuV
VHF
44-230
20-28
1,2
or
comb
<4
10
GME
PSK06
or
PSK08
100
-33
-25
freq adj
110
UHF
520-860
32-38
<3
10
N/A
N/A

 

Variable frequency notch filter to remove pager interference or amateur radio interference etc. Notch adjustable from 130 to 167 MHz approx.

FM broadcast stopband filter 88 to 108 MHz.

MHW34F $59.95

MHW34FS $64.95

TV Masthead Amplifier for VHF/UHF antenna. Shielded (FS) or non-shielded (F) models. Screw to RG59 or RG6 cable type

Notch filter to remove pager interference. 

MHW34F $74.95 package with PSK06

MHW34FS $79.95 package with PSK06

   MHW34F &FS
 
Freq
MHz
Gain
dB
inputs
Noise
Figure
dB
gain 
control
power
supply
Current
mA
FM
trap
dB
Pager
Filter
Output
dBuV
VHF
44-230
22-26
1,2
or
comb
<3
Tilt
16-12
GME
PSK06
or
PSK08
80
-25
-25
freq adj
108
UHF
520-860
34
<2.5
15
N/A
N/A

 

Fixed frequency notch filter to remove pager interference.

FM broadcast stopband filter 88 to 108 MHz.

FLOFMWP

TV Filter for masthead use or other. Has an FM broadcast stopband filter  87.5 - 108 MHz and a variable frequency notch filter to remove pager or amateur radio band interference. Screw to RG59 or RG6 cable. 

$64.95
   FLOFMWP
 
Freq
MHz
Loss
dB
inputs
Noise
Figure
dB
gain 
control
power
supply
Current
mA
FM
trap
dB
Pager
Filter
Output
dBuV
VHF
44-470
0.5
1
n.a.
no
n.a.
 
n.a.
-30
-30
freq adj
n.a.
UHF
470-860
0.5
n.a.
no
N/A
N/A

FM stopband filter for 87.5 to 108 MHz AND Variable frequency notch filter to remove pager interference or amateur radio interference etc. Notch adjustable from 121 to 310 MHz approx.

 

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