Forum: Electrics and electronics
29 January 2013, 22:44
|
|
Replies: 17
Views: 2,927
Two excellent points made:
1. Ensure there...
Two excellent points made:
1. Ensure there isn't a short between the core and the braid of the coax (a common fault). This can be checked either with a swr meter and/or a multimeter.
2. ICOM...
|
|
Forum: Electrics and electronics
28 January 2013, 22:00
|
|
Replies: 17
Views: 2,927
Any marine radio is useless without a decent...
Any marine radio is useless without a decent tuned antenna and good quality coaxial cable. The power transmitted only works through an efficient antenna.
1. Ensure all power and antenna connections...
|
|
Forum: Electrics and electronics
07 March 2010, 21:04
|
|
Replies: 12
Views: 4,820
|
|
Forum: Electrics and electronics
07 March 2010, 21:00
|
|
Replies: 11
Views: 2,724
|
|
Forum: Electrics and electronics
07 March 2010, 20:22
|
|
Replies: 11
Views: 2,724
Radio Wavelength
The size of any omnidirectional antenna is obtained by the following formulae:
300 divided by Frequency (Mhz) = Wavelength (Metres)
Therefore if you wish to make your own steel whip:
300 /...
|
|
Forum: Electrics and electronics
05 March 2010, 21:04
|
|
Replies: 3
Views: 1,860
|
|
Forum: Electrics and electronics
05 March 2010, 20:49
|
|
Replies: 12
Views: 3,040
Fitting Radios'
Hi Folks,
Just remember when fitting radio kit into your RIB, that the radio speaker and microphone contain magnets - hence the reason you fit them 1m away from your compass; and don't make the...
|
|
Forum: Electrics and electronics
05 March 2010, 20:41
|
|
Replies: 3
Views: 1,860
Hello Ed,
Most NMEA signals consist of...
Hello Ed,
Most NMEA signals consist of "DATA" and "SHIELD" or screen to/from the GPS unit. I've not worked on the Cobra F75, but the data input at the back of the unit may also double as the data...
|
|
Forum: Electrics and electronics
16 January 2010, 20:12
|
|
Replies: 18
Views: 3,735
|
|
Forum: Electrics and electronics
06 January 2010, 20:38
|
|
Replies: 18
Views: 3,735
Handheld CB radios are not widely available...
Handheld CB radios are not widely available anymore since OFCOM released the UHF 446 PMR frequencies. A well known store have a twin pack of Motorola's for £25 at the moment and a quad pack of...
|
|
Forum: Electrics and electronics
06 January 2010, 19:59
|
|
Replies: 18
Views: 3,735
Radio comms
If "commercial radios" are to be used, a specific frequency and a license from OFCOM would be required (this can be VERY expensive).
Depending on what you want to use them for, (just general...
|
