johncschopp

Hi I was given a E K logictrol radio ,complete with rx. & servos. Made by Kraft Midwest, Champion model . I need to know how to charge this. Looks like a 110 V. female plug on the bottom along with a round 6 pin plug. I think I have the plugs /wires to do this but do not know how. The radio was A M A gold stickered in '92, so I would like to use it. Any Help ? Thank you

c/f

My Feedback: (1)

Jerry Krause is the K in E K, he is a current AMA turbine waiver pilot and a heck of a nice guy. ask in the Jets arena for an e-mail and he surely would help you out.........

johncschopp

Thanks for the heads up on the EK radio but we are unable to locate Jerry Krause - in the Jets category - can you give any help with this? An email address or just his screen name.

parkavenue

My Feedback: (262)

Let's try this... The AC plug goes to the transmitter and will power the "built-in" charger. The "round" plug in the transmitter goes to the airborne pack or the aircraft charging plug (if installed). Should charge for "overnight" depending upon the battery capacity. I have not used the EK systems for 25 years - but this is the best that I can remember. If this does not make sense, please email me and I will try to find some of the original instructions. I still have 3-4 EK systems in LONG TERM storage. Regards, Richard

johncschopp

Thanks for the information on the E K transmitter I've tried charging with the 110 volt line but after 5 hours of charge I get zero volts on the meter. Is it possible or worthwhile to replace the original batteries? They seem to be hard wired to the unit, would I substitube the standard 9.6 volt pack? What are your thoughts on this?

parkavenue

My Feedback: (262)

It is NO problem to rebuild the xmit battery pack. If I remember correctly, the battery consists of sub-c size cells and there is a diode attached to prevent reverse charging. Should be easy to disassemble the battery pack and verify the size and quantity of batteries. Regards, Richard

dirtybird

My Feedback: (5)

I was the EK rep for the Seattle area 1970-75.
I don't recall seeing an EK transmitter with sub C cells in it.
What I remember is two standard 4.8V packs.
A standard 9.6 V pack should work fine if you can get it in the transmitter.
Otherwise just use two 4.8 V packs in series.

rctrax

I have an old EK radio and as I remember the power was 12 volt with 10 button cells stacked and shrink wraped to look about like a 2 cell D sized pack [12 vo;t] Mine was an EK Logetroll instead of a Champion. That might make a difference.

parkavenue

My Feedback: (262)

Gee, how the memory goes into NO recall after 30+ years. I just re-discovered my 1972 EK in the basement, removed the xmit back and found TWO AA 4.6 packs for a total of 9.6 volts. I have not looked at a Champion in many years but I believe most probably followed this configuration for the remainder. My first "metal box" EK had a different configuration - don't remember that far back... Good luck, Richard

dirtybird

My Feedback: (5)

The only difference between the chanpion and the regular EK radio was the champion had the servo electronics built into the receiver. That made the champion servos a lot cheaper.
No EK radio I ever saw used 12 volts in the transmitter. Although they were in business during the 60's using Bonner servos. Those radios might have been different.

johncschopp

I have taken the battery packs apart and have found in each of the two packs 4 individual l.2 cells. So I think I will replace it with 2 4.8 volt packs.

Do you know what the red push button is for above the left stick? There is also a small togel switch on the top of the transmitter and a white trim switch that is located in the middle of the face between the two sticks. What do they do?

parkavenue

My Feedback: (262)

Here is my vote! I have NOT owned the exact transmitter that you are referencing, but my "guess" is: The pushbutton is for a "buddy box" configuration; the toggle switch on the top is for the 5th channel; and I don't have the slightest idea about the "trim" lever in the center. Regards, Richard

apteryx

I "flew" and still have EK Logictrol stuff. Great little radio for the time and still useable today if you want to fly some vintage equipment
AND it's made in the USA. Hard to miss one on the flying field with the "Hurst, Texas Red". The 2 stick 6 channel "Champion" used to sell for $360 in the early 70s ....a lot of money, especially back then.

As you found out, the Tx has two 4.8V NiCad "AA" packs and the batteries are easy to replace. The Rx uses the 4 sub "C" cells (which I always replace with modern "AA" cells).

The red pushbutton is for the buddy box. Push it in on the master transmiter (experienced instructor) and the slave transmitter has control, let it up and the master transmitter has control.

The toggle switch is an Aux #1 channel for landing gear, etc. The "trim" in the center is an adjustable Aux #2 channel for flaps, etc.

I'm still looking for a schematic of the transmitter if anyone has one available.

Good luck with your EK Logictrol.

FOD MAN

i know this is an old post but the transmitter will not charge unless you charge the receiver battery at the same.