Charging a PMR

[DaveGSCymro]

How do you go about charging your PMR whilst away for a week? Does anyone have an adaptor to charge off the bike? Or is it charge it in hotel rooms?
Thinking of buying the Motorola T5422.

Thanks
Dave

 

[Blackal]

Good question!

I've been trying to find a 12v/6v adaptor to run one off the bike for a while now, including internet searches. I had one cigarette lighter adaptor but it took up a lot of space and got surprisingly warm in service. I didn't really fancy this fire hazard so close to my 'nads to be honest :gosh

I'm planning to go for a different radio (Kenwood) but would still like to know if anyone has a source of power supply for a 6v PMR.

Al

 

[ebbo]

That’s interesting as I just carried out a current test on my Kenwood TK3107 last night with thoughts of building a 12v/7.2v regulator.
Standby current was 60ma – Transmit was 1.5a (due to 4w tx)
A voltage regulator based on an LM317 might just do it, but it will need a good heat sink on transmit

Standard PMR radios have a much lower current draw, the Alan 456r could last a couple of days on 'good' batteries

 

[ebbo]

Found a circuit specifically aimed at PMR radios
http://www.zen22142.zen.co.uk/Circuits/Power/lm317.htm

I wouldn’t bother trying to add the zenor over voltage led myself, but the power one might be useful

 

[Blackal]

Ebbo,

You're a star! I'll get an electrician friend to get me the bits - SORTED!

Cheers!

Al

 

[Shuggie]

I've got one of these 3107 jobs myself, and looks as if I have the same prob as you mate. Does the charging led ever show green on your charger base? I've tried to up the amps to see if that makes any difference but it appears not. Any solution you can think off?

That’s interesting as I just carried out a current test on my Kenwood TK3107 last night with thoughts of building a 12v/7.2v regulator.
Standby current was 60ma – Transmit was 1.5a (due to 4w tx)
A voltage regulator based on an LM317 might just do it, but it will need a good heat sink on transmit

Standard PMR radios have a much lower current draw, the Alan 456r could last a couple of days on 'good' batteries

 

[Bigtwin]

Got a step-down 12-6v on the bike. The business bit is mid-line, not part of the plug, so have wired it (fused) direct to the battery, and keep the working part away from harm and well-vented.

Been going 18 mts now with no probs - run the radio off it all the time too.

 

[engine house]

12v to 3>7V at 2.1A

You could try this one if you can put up with the colour (metallic purple) just cut the plug off and put on the BMW type.
http://cpc.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=PW00959&N=411

saveing time for more

 

[prul]

got myself an intaride kit with a bike power converter for the A80

http://intaride.com/eu/a80-bike-to-bike-radio-power-supply.html

works

prul

 

[PIGGLET]

If you've got an autocom you can get a lead which allows the bike to power the radio depending on which one you go for. I've gone down this route with a kenwood tk3201 and have the radio clipped to my tank bag then there is just one lead going to the autocom which carries the audio and power. Super neat

 

[ssi]

http://www.446user.co.uk/forum_index.html

Try asking same question on this site or searching as I think this has been answered recently on it.