Futaba, JR, and Hitec transmitters. HK has a Mickey Mouse System to connect the need- ed HK-X600 RF module to a Spektrum transmitter using a Spm 9545 Auxiliary Re- ceiver that is already bound with a Spek- trum transmitter. This is plugged into the module and power is supplied via a separate port on the module. The Spm 9545 Auxiliary Receiver receives the signal from the trans- mitter and the module rebroadcasts a signal compatible with the Super Micro receiver. I got a $23 HK-X600J RF module and a
couple of receivers. I was able to get the module to function with my Spektrum DX6i transmitter via an aux receiver per the in- structions. Better yet, I hooked up the trans- mitter module directly to a Spektrum DX6i without the aux receiver. Dan Scharlach
dblove98@myfairpoint.net sells a Plug and Play PPM Converter for $16 that inverts the pulse train from the DSC (trainer port) on a DX6, DX6i, or DX7 and picks up the power from the charge jack to power the HK trans- mitter module. All you need to do is fasten the converter to the module and fasten the module to the back of the TX. Plug in the leads and you are in business. I also used an adapter cord I had made up
for a Z-tron transmitter module to hook up the HK module directly to my Hitec Flash 5. These all worked and I was able to bind and program the receivers via the dip switches. However the range was extremely limited. I had noted the antenna connector seemed
to be loose. So I took the unit apart to see what was going on. Sure enough, when I cut the shrink wrap, the antenna coax was com- pletely severed. It had twisted off. It’s a won- der it worked at all. I ordered another mod- ule as I doubted I could repair it. The new module had an antenna mount that was not loose and when I screwed on the antenna it went right on and was tight. This time the range was quite good. I
might also mention the design of the anten- na on the receivers is lousy. The multi strand antenna wire has a stiff insulation which results in a stress point at the solder joint. Several have broken off. However it is easy to solder a length of #30 wire wrap or buss wire in place similar to the way Spek- trum does it. A drop of Goop to stress relieve the joint doesn’t hurt. The $24 HK 5-channel brick receiver (HK0104ARX-H) has many nifty features: two built-in linear servos, a built-in 2A brushed ESC, and two JST-SH connector sockets on the board similar to those on a
Spektrum AR6400. The receiver is pro- gramed by the position of five dip switches on the RF module at binding. The dip switches are ignored the rest of the time. You can change the receiver to an external ESC mode by placing SW-1 to off. You can change the receiver over to a 3-channel mode (the transmitter right stick (aileron) controls rudder servo on brick receiver) by placing SW-2 on. You can also swap the con- trol of the two built-in servos. This means you can have the right side
servo (which usually controls the rudder) to now control the elevator and the left side servo to control the rudder (the same as the AR6400). This swap is done by setting SW- 3 on. The two JST-SH connector sockets will accommodate Spektrum AS2000 servos or the equivalent Hobby King HK1300. One of these is the aileron servo and the
other a fifth channel. However the fifth chan- nel connector can be programed to aileron as
well by SW-4 on. The direction of this servo can be reversed by SW-5 on. This is useful if you plan to use aileron differential. Binding is simple: apply power to the
brick receiver first and wait a few seconds for a dual flash sequence of the LED and then, while holding down the Bind button on the RF Module, apply power to the RF Mod- ule and wait a few seconds until the receiv- er LED stops blinking. One more thing. The HK brick is 7⁄8 inch wide where as the Vapor
brick and AR6400 are 11⁄16 inches wide. That 3⁄16 inch difference may not sound like much, but it allows the receiver to be mounted flat in a number of small models which are too skinny for the ParkZone stuff. Finally, the motor connector and power connector are at the opposite end of the receiver from the ser- vos, which makes for an easier installation than with the ParkZone systems. I need more testing time before I can fully recom- mend these systems.
PHOTOS: STEW MEYERS
The Hobby King HK0104ARX-H receiver and Spektrum Ar6400 receiver compared (above left). The HK is a half gram lighter in part due to the shorter power lead. The HK RF module mounted on a DX6i with a prototype of the plug and play PPM converter (above right). Other HK receivers (below left): the servo-less receiver HK104RX- S with four connectors (top). Next the HK103RX-S drives actuators. The HK0104ARX-HBL (bottom left) has a built- in single-cell 3-amp brushless ESC. The antenna has been replaced on this brushed example of the skinnier 3- channel HK0104ARX-LS (bottom right). This also comes in a brushless version. Dan Scharlach’s Plug and Play PPM converter (below right) allows a HK-X600J RF module to be directly connected to a DX6i or DX7.
PHOTO: STEW MEYERS
The enlarged 16-inch Nieuporteneezer with AR6400 and GWJ 7mm red back motor (above left). It could have easily used a 6mm Cubor 8.5mm P-51 motor if throttled back. The Nieuporteneezer in flight (above right). The 0.08 carbon
FLYING MODELS
PHOTO: PAT DAILY
rod spars and thread landing and flying wires on the curved Nieuporteneezer wing make for a rigid structure. The struts have Sig hinge tabs on the ends that plug into slots in the balsa ribs.
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