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Old 06-19-2013, 06:19 AM   #1
Crocodile Tears OP
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Powering Garmin Handhelds

Noob question, I'm certain, but...

I continue to see people prefer the GPSMAP 78 over the 62 because of the hardwired power options available. Someone want to run through the advantages/disadvantage to the pair? I look in the online manuals and it looks to me like they both run on USB power? Or am I interpreting that wrong?
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Old 06-19-2013, 06:40 AM   #2
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Errr.... Scratch that. Now I see the 4 pin connector on the 78. Vastly superior, Ill assume?
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Old 06-19-2013, 12:01 PM   #3
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As far as I know, operation is identical. Going from 60 to 62, they droped the 12 V input for some unknown reason.
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Old 06-19-2013, 03:21 PM   #4
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Errr.... Scratch that. Now I see the 4 pin connector on the 78. Vastly superior, Ill assume?
It's superior because it is "waterproof" and won't randomly juggle out. You can also run it straight off your battery without needing any converters, USB runs at 5V, so you'd need a an adapter, which are less-than-rugged in my experience.
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Old 06-19-2013, 06:04 PM   #5
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Noob question, Someone want to run through the advantages/disadvantage to the pair?
Pair of what? 62/78 or USB 5V / Round 12V
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Old 06-21-2013, 10:48 AM   #6
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As far as I know, operation is identical. Going from 60 to 62, they droped the 12 V input for some unknown reason.
So what is the connector type on the 62 for external power?

You're saying the 62 won't take 12vdc external power? What is the voltage?

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Old 06-21-2013, 11:00 AM   #7
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62 is USB only. "Works" for some, not for others. USB is considered to be too fragile for MC use in rough terrain/bad weather. 12V to 5V adapter robustness also questionable.
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Old 06-21-2013, 11:04 AM   #8
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So what is the connector type on the 62 for external power?

You're saying the 62 won't take 12vdc external power? What is the voltage?

Thanks Jerry
The 62 series gets its external power though the mini USB connector on the back of the unit. USB power is +5vdc, so the bike's battery power must be stepped down to +5vdc from 12 volts.

Regarding running off batteries, I've had good luck running PowerEx batteries and a PowerEx Wizard One Charger.
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Old 06-21-2013, 12:03 PM   #9
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62 is USB only. "Works" for some, not for others. USB is considered to be too fragile for MC use in rough terrain/bad weather. 12V to 5V adapter robustness also questionable.
Good input. I still may buy the 62. For the past few years using a 60 I've only used batteries and I keep the back light off to extend battery life. There are times when I can't see the screen due to lighting so have external power option would be nice.

The main reason I want to go to newer model is to get a higher allowable point count in a track and get more tracks allowed to be stored in the unit.

The 60 only allows 500pts per track. I've been to a number of events where they load a track onto your device with like 1500pts and the device truncates the track. The result is midway into the ride and pop no more track to follow. The newer devices like the 62 allow 2000pts per track.
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Old 06-21-2013, 12:21 PM   #10
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Consider the 78 or 78s. They have the big four pin power plug that is on the 60/76. And the better tracklog capability of the 62. 78 has the buttons above the screen 76 style.
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Old 06-22-2013, 10:27 PM   #11
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I've been to a number of events where they load a track onto your device with like 1500pts and the device truncates the track. The result is midway into the ride and pop no more track to follow. The newer devices like the 62 allow 2000pts per track.
What events? Really lame promoter. SOP is a 500 point track gas to gas with ooptions along the way is othe tracks. 60/76 work fine for events, actually better in some cases. They are used by 80% of my customers.
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Old 06-27-2013, 06:00 PM   #12
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No doubt mini USB is a bit crap for an adv bike application but you can make it work. To run a 62s off the 640 I soldered an acc power feed directly to a cheap 12Vcig-USB socket & taped a cable into that to seal it up. At the GPS end I simply used a blob of blu-tac to seal & damp vibration. After coming up with the blu-tac fix that setup powered the 62 flawlessly for a week of hardcore dual sport touring, on the famously vibey 640, including some quite crappy weather.

Nav is usually my girlfriends job & the 62s has done a lot more hrs on her bike with a similar setup with no probs.

Cheers
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Old 07-02-2013, 11:37 AM   #13
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The 60/62's are meant to be more of a handheld, hiking/non-motorized receiver.

76/78 is a small-boat marine unit.

Boats have autopilot units, chartplotters, etc that all want serial NMEA data in/out. If you're hooking it up to that, legacy equipment also provides power to the devices. So ... Garmin threw their 4-pin round connector on these so you can use one connector to apply power/ground/txd/rxd. If you're not using data, just use power and ground. That power input can be somewhat unregulated, GPS's with that connector (and without a 5th plastic pin in the middle) can take 8-30 volts DC on that input.

They dropped the 4-pin because you're not using a chartplotter or autopilot unit out hiking.

I've got my 60 on ebay right now (Probably throw my ancient GPS12 on there too, saw a few going for $80+ ), once that sells I'll be getting a 78 and a RAM-mount for it.
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