Raymarine GA150 GPS Antenna - Specs / Equivalent?

[machineage]

Hi all!

So I've been looking for an equivalent / replacement antenna for a Raymarine GA150, for use with a Ray90 VHF. I haven't been able to find any specs for the GA150, save for it being a 'passive' antenna with a coax cable terminating with a TNC. Now I've run into some conflicting descriptions of passive antennas, some suggesting they have no internal electronics, others suggesting they have inbuilt signal amps & are fed 3-5v via the coax. I've also read that some Raymarine GPS antennas have an internal battery.

I'm looking to find an equivalent for the GA150, preferably one of the small puck style antennas to site under cover, adjacent to the VHF, rather like the ones Icom are now supplying with their radios. I see there are a multitude of these puck style antennas available online very cheaply, most of which are spec'd as active requiring a 3-5v supply.

Can anyone shed any secrets as to the GA150's specs, or have any ideas?

Thanks!

 

[PaulRainbow]

Someone posted recently that they had used one of these and it worked, night be worth a try, the Ebay feedback is all good:

MARINE BOAT GPS ANTENNA AERIAL TNC RAYMARINE | eBay

 

[machineage]

@PaulRainbow funny you should suggest that one, I had already reached out to the seller to ask for specs!

Further reading would suggest that any GPS antenna with a cable more than a few inches requires a pre-output Low Noise Amplifier, and given the Raymarine A150 'passive' antenna comes with a 10M cable, it would suggest it incorporates a LNA. This type of antenna is most often described by manufacturers as 'active'. Raymarine describe their 'active' antennas as those that output NMEA etc, hence the confusion in descriptions.

I would really like to find the specs for the GA150, frequencies, bandwidth, Impedance, gain etc.