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will also shield the boxes from any direct sunlight. Also. tum both boxes to where the heat sinks are facing north. or are in the shade all the time. The boxes should be painted with a good quality rust inhibitor paint. The bottom and the side on which the large heat sinks are mounted should be a flat black fin ish. Other areas should have a light-color fi nish to help reflect heat. The dual-battery setup will provide plenty of backup power in case of poor voltage outpu t fr om the solar panel due to clouds, smoke or haze. I have run a test using just the fully charged batteries alone. with no charger in the circuit. When I set the TNC to beacon one line of text every 10 seconds, and the HT to full power of 2.5 watts out, it ran for five days with only a half volt (O.5 V) drop through the test period. There is no reason you cannot use just a single battery instead of two. The total package would be lighter by about 15 pounds. Operation The system should be set up before you transport it 10 a remote location. Plug your terminal into the RS-232 I/O pori on the HT/fNC box, then apply power to the system by plugging in the power cable from the battery box. The following pa rameters are for the TNC-2 type, for unattended digipeater service: CONOK-OFF: TXDELAY: SO: USERS=O: HID=ON DWAIT:O: D1GI::ON: MON::OFF: Unplug the power cord and disconnect the termin al. You are now ready to use this system when needed. Whatever HT/fNC and battery combination you usc. it will have to be a special design to fit your needs. Integ rated Circuit U, U2 lJ3 U4 Transistors 0 1,04 Q2 C3 D_ Ol oe.oa Resistors Rl,R2,R3 R4,R5.R6,R7,R8,R9 Rl0,R 11 ,R12 R1 3,R14,R15,R16,A17 R18,R19.R22 R2D R21 ceceenees Cl.C2 C3,C4,C7 C5.C6 Relays RVI RV' Batteries BT1 ,BT2 Parts List for Solar Controller LM339 voltage ~l1'Itor 4011 CMOS QUad IwO-lnput NAND gale 12 volt voltage reg ulator 5 volt voltage regulator Gene ral purpose NPN (2N2222, 2N3904, elc.) Generalpurpose PNP (2N3905, etc.) TIP31 NPN Silicone 5OVat 6 8"1>S (l N5400, etc.) I N4001 20 kilohm 15-lum trtmmers 1 megohm 1'4 wan 220 ohm, 1/4 wall 100 kilohm, 1/4 wall 47 kilohm, 114 wan 10 kilohm, 1/4 walt 2.2 kilohm, 1/4 wan 10 p.F, 35V elec:trolytic 0.1 Ilf, SOV disc 1 I:lF, 35VelectrolytiC 12V DPDT (l&-pin DIP) 12V DPDT(1 0 amp contacts) 12V al 14 Ah rrctcrcycre-tyne or qel-cet RS27&-1712 RS276-2411 RS27&-lnl RS27&-1no R$276-2017 RS271-340 AS275-249 Circuit boards are available from FAR Circuits, 18 N640 Field Court, Dundee IL60118 lor $8 plu s $1.50 S & H. This article is intended as a simple guide. Any comments are welcomed. and a SASE will be appreciated for any return comments. II Acknowledgements: "Captain Kirk's Lunch Box, Part I ," by Robert Hoover KA6HZF, CTM Magazine, August 1987, page 21 . "Captain Kirk's Lunch Box. Pan 2:' by Robe rt Hoover KA6HZF. CTM Magazine, September 1987. page 28. "Total Solar" by Mic hael Bryce WB8VGE. 73 Magazine, May 1986. page 60. "The Battery Topper," by Michael Bryce WB8VGE. CTM Magazine, June/July 1987. page 25. ••••••••••••••••••••••••••••• I I I I I I I I • Factory Authorized Dealer & Se rvice For ! KENWOOD YAESU ICOM CallUs For Great Prices & Great Service TOU ""!!'!!' OIlD!!'1I LIN. '''O~'I-3 'U ~" US "" " S1l1' AMaT£UR RADIO SHlI'fer •.•......_ I I I I I I I • (5:'~ AlJ.6"O _.......• • IIIIII NEW!Tone-Mastcl'~ Touch ToneDecoder MoTrOD Bk:d.roDics 310 Garfielc:l sr., SuRe' .. Eug_ OR97402 Info; (503)687·21 18 OrdetS ;(8001338-9058· Fax: (503)687-2492 o.c- _ ~ Touctl Tc"_Ifom. II I p""'''' ,llCOIdIo. _ .... ... neaI!y ",.., __ -...:e. ~ Ie ltIJl LCD dl11N1. &0 digit l "oR' bl. buller ~ High ~ dei;:" ~ lIgiIs 1* --.:I ./ 1lo.OII.......... ./ 'iN bil'*Y ... . .....,. power ./ "-'aI_ ./ TJ,l· 16 PlUS indudn flS-232 ouIpuI and SoIIw..1 lor gplionaI aucomatic dl leIUm.lnumb.f logging using 10ur IBM Compllitll. compuler ./ Balli., and audoo cablu inducled. TM.Hi Slandard Model $t69 saa, TM-16 1'I.US Rl.-llHIod
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Page 36 and 37: Number 8 on your Feetlbec k card Bu
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