To David Drake - AHDNN1A.DDRAKE01@ed*.co*
Fifth try. Direct e-mail failed four times:

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
From: postmaster@DN*.ED*.CO*
To: CC015012@br*.br*.ed*
Subject: Delivery Report (failure) for AHDNN1A.DDRAKE01@ed*.co*
Message-Type: Delivery Report
Date: Tue, 14 Mar 1995 16:13:59 -0500
Content-Identifier: Third try

This report relates to your message: Third try
        of Tue, 14 Mar 1995 15:34:29 -0500

Your message was not delivered to   AHDNN1A.DDRAKE01@ed*.co*
        for the following reason:
        One or more of the message parameters is invalid
        API069E SENDER DGN.DEN NOT FOUND AND AUTO REGISTRATION FAILED
        OR INHIBITED RC: 000
* Recipient-Info: AHDNN1A.DDRAKE01@ed*.co*,
*         /RFC-822=AHDNN1A.DDRAKE01(a)eds.com/PRMD=Internet/ADMD= /C=us/;
*         FAILURE reason Transfer-Failure (0);
*         diagnostic Invalid-Parameters (11);
*         last trace Tue, 14 Mar 1995 15:34:29 -0500;
*         supplementary info "API069E SENDER DGN.DEN NOT FOUND AND AUTO
*         REGISTRATION FAILED OR INHIBITED RC: 000";
****** End of administration information
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Hi David,

The short answer to your questions are
a) I use the IRFZ40.
b) Converting the UK1200 for NiCds is as easy as buying NiCds.
c) Converting the UK1200 for 20 or 30 Watts involves nothing more
   than buying the bulbs and putting them in.

>Can I have my battery packs setup such that I can charge each pack seperately,
>or will this create a problem 'cause the cells aren't matched?
d) I don't understand the question.  If the packs are closed then
   why not use them until they fail ?  Why worry if the alternative
   is to store them idle in the basement or something ?
   It is correct however that for a long service life you should
   charge each NiCd cell separately.


>How can I check the internal resistance of the Renewal Batteries?
e) Put a 1 ohms resistor over the terminals of one and see what happens
   to the voltage of the cell.  In general for any R:
   V_loaded = V_unloaded  I_discharge * R_internal.
   Measure the Vs, calculate I_discharge (= V_loaded/R_resistor) and
   solve for R_internal.  A 1/4 Watts resistor will burn up
   about instantly when you do this so do get a beefy one. Anything
   from 1 ohms and down to 0.30 can be used *if* the alkaline can take
   it.

   Alkalines typically measure in at 0.3 Ohms per cell.  I.e at 5 amps
   they output about *no* voltage.  NiCads measure in at 0.03 and will
   provide 5 without batting an eye.


I stand by my initial offer but would prefer to get in direct
contact just to nail down any remaining or future issues.


john 015

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