[MFJ-Ameritron] Re: MFJ-Ameritron Digest, Vol 2, Issue 4

[Charles B]

Richard,

Good work.  Let us know when you find out something.

Chuck


Richard Keller wrote:

> Ok Guys,
> I have more info on this after watching closely after I charged the
> NIMH batteries I installed several months ago. Here is what is
> happening.
> 
> After a full charge of 14V I let it sit for two days and the voltage
> dropped rather steady until it reached 12.6V, then it stayed there for
> the last 3 days.
> 
> Now we are on to something. It seems that the battery charging circuit
> built into the unit has a fault/characteristic that drains down the
> voltage to that precise level and then stops drawing current. I will
> contact MFJ and see what chip they use for the charger. Either they
> made a mistake in adding the external components or the chip is not
> being used in the correct configuration. No way to tell without a
> schematic. Will try to get that also from MFJ.
> 73, Dick KF4NS
> St. Petersburg, FL 33714 USA
> Keep the glow!
> 
> ----- Original Message -----
> Today's Topics:
> 1. Re: MFJ259B analyzer (Harry)
> |
> |
> | --------------------------------------------------------------------
> --
> |
> | Message: 1
> | Date: Fri, 16 Jul 2004 21:08:41 -0400
> | From: Harry <hgk at centurytel.net>
> | Subject: Re: [MFJ-Ameritron] MFJ259B analyzer
> | To: mfj-ameritron at mailman.qth.net
> | Message-ID: <40F87C19.6000508 at centurytel.net>
> | Content-Type: text/plain; charset=us-ascii; format=flowed
> |
> | Wow
> | You got me thinking as I haven't looked at my MFJ-259B in over a
> year!
> | Has cheap Radio Shack nicads.
> | I turned it on and the display showed:
> | MFJ-259B
> | Ver 2.22
> |
> | MFJ Enterprises
> | (c) 1998
> |
> | Voltage OK 12.4v
> | IIIIIII
> |
> | There must be a flaw in my meter as the batteries are still up?
> | 73
> | N8GNI
> |
> |
> |
> | John/K4WJ wrote:
> |
> | > My 259b does the same thing. I charge the batteries and then a few
> days
> | > later the voltage drops even though the unit is turned off.
> | >
> | > While I was at the Miami Hamboree in February I asked one of the
> fellows
> | > at the MFJ booth and he said that this is normal. He wouldn't say
> why
> | > this happens. I bought a new set of Nimh cells (they are not
> cheap)
> | > because I thought the first set was bad. I guess I need to keep
> the 252B
> | > floating on my charger at all times in order for it to work when I
> need it.
> | >
> | > 73..de John/K4WJ
> | > Pembroke Pines, FL
> | >
> | >
> | > At 06:13 PM 7/14/04, Richard Keller wrote:
> | >
> | >> Not having any luck with my queries but will try again.
> | >>
> | >> This time it is about the idle state current and power off
> current if
> | >> any.
> | >> I notice that the 259B I have now seems to drain the batteries
> when idle
> | >> (plausible) and also with power off. With power off, the
> batteries show
> | >> 12.6vdc 2 days after a full charge (14.0vdc) which is a bit
> curious.
> | >> Anybody have one who can confirm or dispute this ?
> | >> 73, Dick KF4NS
> | >> St. Petersburg, FL 33714 USA
> | >>
> | >>
> | >
> | > 73..de John/K4WJ
> | > ***********************************************************
> | >   John/K4WJ in Pembroke Pines, FL
> | >    QTH  26 00 51 N
> | >         80 16 16 W
> | >
> | > K8PXG from 18 Jun 59 to 11 Feb 97
> | > K8WJ  from 12 Feb 97 to 07 Apr 97
> | > ZF2HZ from 17 May 84 to 31 Dec 84
> | > ***********************************************************
> 
> 
> 
> ---
> avast! Antivirus: Outbound message clean.
> Virus Database (VPS): 0430-1, 07/19/2004
> Tested on: 7/19/04 5:44:02 PM
> avast! - copyright (c) 2000-2004 ALWIL Software.
> http://www.avast.com
> 
> 
> 
> _______________________________________________
> MFJ-Ameritron mailing list
> MFJ-Ameritron at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/mfj-ameritron