apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 introduction this kit provides a solid mechanical platform with good shield - ing and grounding to breadboard eight pin to-3 packages or the mo-127 package with 0.060" pins. this kit is not intended as an alternate for kits dedicated to speci?c ampli?ers. see www. apexmicrotech.com for availability of dedicated kits. construction will involve surface mounting and 3d techniques. holes are provided to mount standard banana and bnc connec - tors for i/o. see the apex accessories information data sheet for a selection of ?at-back heatsinks and thermal washers for these packages. note that hs11 is compatible with EK09 and all three sockets can be used if desired. if the EK09 is to be used as an mo-127 platform only, hs18 rated at 1 c/w is a cost effective alterna - tive to hs11 if internal power dissipation permits. lower cost alternatives for two package to-3 applications are hs02, hs01, and hs09. for single package to-3 applications the hs13 is also suitable. the six chip capacitors provided can be used as the critical ?rst step in power supply bypass for dual supplies for all three sockets. these capacitors are rated at 200v. parts list part # description quantity pb99-p2 top 1 pb99- p6 side 2 pb99-p7 side 2 ms02 cage jacks for one to-3 socket 2 ms04 cage jacks for one mo-127 socket 1 ox7r105kwn 1f cap 1825b105k201n,novacap 6 before you get started ? attempt to visualize the ?nished circuit mechanically and in terms of where the high currents ?ow. ? use proper esd precautions. ? verify heatsink is adequate ? use thermal grease or apex thermal washer. ? do not make or break any connection on a hot circuit. ? start with lowest rated voltages. ? checking for oscillations with an oscilloscope is a must. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??????????????????????????????????????????? ???? assembly let us de?ne the side of the top board with solder pads for each pin (roughly triangular on the to-3 sockets) as the component side, where all the support components will determine circuit function and will be inside the ?nished box. the other side of this board is hereby dubbed the ampli?er side. insert cage jacks from the ampli?er side and solder. consider one of these techniques: 1) place cage jacks in holes, cover with one of the 6" copper sides, ?ip over and solder, or 2) place cage jacks on pins of the ampli?er, insert and solder. if done carefully, technique 2 can be used for the mo-127 package with 0.040" leads. starting with one short and one long side, locate a vertical square corner in your work area (a large heatsink standing on end works ?ne) and solder the two together. repeat for the other two sides, and ?nally solder the two pairs together. with the component side up , place rectangle of sides on top and tack two opposite corners. when satis?ed with alignment, solder the box together then add connectors and components as desired. note that copper on the inside and on the top of the box will all be tied to ground. copper on the four outer sides of the box will be ?oating unless you tie them down. soldering a stranded #10 to #16 ground wire from the immedi - ate area of the socket(s) to the ground connector of the power supply(ies) is good construction practice. if the circuit is not a bridge, run this same size wire from the socket area to the out - put return connector. this will avoid high currents in the ground plane which may destroy signal integrity or even an ampli?er. this is a good time to think about star grounding where each ground connection has a dedicated path to the center of the star such that currents in any path are not capable of inducing voltage in any other path. note that the layout makes it easy to locate the star center nearly coincident with the socket center. auxiliary circuits may be mounted inside the box in 3-d fash - ion supported on ground connections or on daughter boards as convenient. other style connectors, switches or indicators can easily be added by simply drilling the appropriate holes and mounting them.
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 evaluation kit for to-3 / mo-127 packages EK09 figure 1. components included in EK09. ?? ????? ????? ?? ?????????????? ?????????????? ? ? ? ? ????????????????????????????????????????? ???????????????????????????????????????? ???????????????????????????????????
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 3 EK09 evaluation kit for to-3 / mo-127 packages . figure 2. external with heatsink (heat - sink, amplifier, connectors and switches not supplied). figure 3. inside of assembled box. holes for components on long side were user drilled.
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 EK09 figure 4. socket detail shows the center of the star ground system is right in the center of the socket. evaluation kit for to-3 / mo-127 packages this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. all speci?cations are subject to change without notice. EK09u rev d march 2001 ? 2001 apex microtechnology corp.
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