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Re: Re: Portadisk

Subject: Re: Re: Portadisk
From: Walter Knapp <>
Date: Wed, 03 Sep 2003 00:32:19 -0400
Martyn Stewart wrote:
>  Walt Wrote
> <Battery usage is about 3 disks per charge. Unless you spend a lot of 
> time in record pause, or have phantom powered mics that draw a lot of 
> current. That's what I get, and I'm recording at night, so almost always
> running with the illumination light on.>
>  Walt, do you use phantom power also mate or a separate power supply for
> the Telinga? I find it hard to get 3 disks from my charge and I use
> "powerex" NiMH rechargeables?
> I must say the rechargeables are longer life than say ordinary Duracell
> batteries! So you get 3x74 mins (3 disks) even using Phantom power and
> burning your LED? Amazing. Maybe I use my pause more than I think I do!

Yes, that's how I go. The telinga I currently have does not use phantom 
power, though the new handle will. The MKH all draw their power from the 
Portadisc. And the LED is nearly always on. In fact it would be nice to 
have a option to disable the auto off.

I'm using GP 2000mah AA's currently. There are some of even higher 
capacity now. Next time I buy batteries I'll move to those. Probably at 
the beginning of next season, I'm retiring the very last of my Nicads.

I don't use pause for long periods like so many do, it's less necessary 
with frogs. If you use pause a lot you won't get near the number of 
disks. It's a tradeoff. And the longer each track is, the more length 
you will get per charge too.

On the other hand, it's really not a issue for me. It's tough to find 
that many disks worth of material in any given evening. Or even most 
entire foray trips.

I also don't run right down to no charge normally. I'll usually plug the 
portadisc into the power inverter each day when running around scouting. 
  NIMH batteries don't have to be fully discharged before recharging. I 
got the figures for how many disks by bench testing with MKH-20's and 
LED on. HHb specs it at 3 hours with their original batteries, and it's 
just slightly longer in my testing with that capacity battery. With the 
higher charge batteries it's a fair amount longer and did three full 
disks with a little to spare. I'd consider 3 disks the best you will 
get, with long recording tracks. The more you turn it off and on, the 
more pausing the more you will fall off that. And, of course the more 
phantom power you draw the less time you will get.

Mostly you just have to get used to what your normal practice does and 
plan around that. Each of us will do a little different. It's not a 

For me the two battery caddies have always been enough. In fact I rarely 
have to go to the 2nd one, so periodically I exchange the two caddies 
just to keep usage even. Even if I get lax about charging I'm ok. And if 
I ever got into trouble, I'm carting a sack full of charged extras. For 
my headlamps, camera flash, MP2 etc. And I have several high speed 
chargers in the Ranger.

Funny how the Portabrace case for the Portadisc has a disk pocket that 
holds 6 disks. And the larger pocket holds my spare caddy and my field 
cards. I'm currently using HHb 80 minute disks, so it's not quite 
balanced, but close enough.



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