[Uram-rejections] "Free" FT709R

Sat Apr 2 22:35:33 BST 2016

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> From webstump at chiark.greenend.org.uk Sat Apr 02 22:18:10 2016
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> From: Brian Reay <no.sp at m.com>
> Newsgroups: uk.radio.amateur.moderated
> Subject: Re: "Free" FT709R
> Date: Sat, 2 Apr 2016 21:14:52 -0000 (UTC)
> Organization: A noiseless patient Spider
> Message-ID: <ndpcm3$15d$1 at dont-email.me>
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>  <ndk4bj$2jb$1 at dont-email.me>
>  <klByymBwHj$WFwM3 at g8bur.demon.co.uk>
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> Andrew Marshall <g8bur at g8bur.demon.co.uk> wrote:
> > In message <ndk4bj$2jb$1 at dont-email.me>, Brian Reay <no.sp at m.com> writes
> >> I must admit, even when I buy cheap Chinese hand helds, I try to buy one of
> >> the empty battery cases which takes standard cells as long term 'insurance'
> >> against the day the original batteries can't be got for love nor money.
> > 
> > This can indeed be a problem. I did likewise for my Wouxun KG-816 4m 
> > handheld. I have a couple of 2m/70cm Baofeng UV-B5s too, but at thirty 
> > quid each I can bin them when they fail - or I could perhaps hack open 
> > the battery pack, remove and bin the Li-ion innards, and attach a lead 
> > to connect to an external power source, perhaps a 6-cell NiMH belt pack 
> > for portable use, or via a regulator circuit from 12/13.8v for mobile or 
> > home use.
> > 
> >> I've always enjoyed converting PMR kit but all too often the hand helds
> >> come with shot batteries and the cases are a pain to re-cell, if it is even
> >> practical.
> > 
> > I've found that the battery packs on the older Icom stuff such as the 
> > IC-U16, IC-H16 and similar, are very easy to open (a few screws) and 
> > re-cell with tagged 2.5AH (or as available) NiMH AAs.
> > 
> > I still use my U16s, and occasionally my H16; yes, they're pretty heavy, 
> > and slightly less sensitive than modern gear, but they're solid and 
> > reliable, have full CTCSS, and can take more knocks than some newer 
> > handhelds.
> 
> > They can run from any number of cells between 6 (1.5w out) and 10 (5w 
> > out) so if 10 AA cells won't fit in the battery case you've got, one or 
> > two fewer will. The internal constant-current charging circuitry can 
> > either be modified to pass a current appropriate for the new cells' 
> > capacity, or removed and an external constant-current supply used.
> 
> 
> 
> The Icoms from that era use battery packs which are a delight to re-cell.
> You can even mod the constant current charger built into the battery case.
> Like you, I've got a U16 plus a couple of IC32's. One was mine and the
> other I bought as a none worker. The one of the relays had failed. I
> couldn't get a replacement but a look at the circuit showed the function
> could be done with a diode or two. 
> 
> I still use them from time to time. 
> 
> 
> 
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