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OLDIE BUT A GOODY !
 Moderated by: W C Greene
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 Posted: Tue Nov 21st, 2017 09:21 pm
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W C Greene
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For a while, I have been using my ancient (1980-ish) Futaba 2 channel AM car transmitter which looks (pretty much) like a "normal" transmitter should look. I also have an old "Captain Kirk space pistol" transmitter which works well, but looks like (to me) homemade s%^#. Some time back, my equally old JR 2 stick job died so I have been pretty much "stick-less" for some time. The Futaba has a small speed control "lever" on the side and the pistol has a trigger speed control-both are not what I wanted! I want my old JR back!
HOWEVER, my buddy Dave Cox found a couple of ancient 2 stick Traxxas car transmitters on fleabay, cheap as hell because (1) they are old 27MHZ AM (2) the battery holders were corroded and unusable (3) the seller knew that there were some old dudes who didn't know better and would pay 30 bucks for both "pieces of crap". Dave took the bite and got them, because nobody else wanted such old crap. Upon receipt, Dave hooked up his 2 cell 7.4 volt Li Poly battery (I know, the damn things are "supposed" to run on 12 volts-8 AA batteries) and the transmitters came to life!

So, he dropped by and I got one which promptly got a spare 2 cell wired up and here she is, a real STICK transmitter, plus one extra if I wear out the left hand stick.
Now why would any forward thinking guys get this old junk and not want the latest Bluetooth (a dental problem?) "smart-ass phone" operating device? Because this is what we wanted. I still have the belief that REAL locomotives-steam, diesel, even electrics-are operated with LEVERS, not buttons or dials. This old thing fulfills my desire to replace the old JR and the price couldn't be beat either. Dave found another one since and I am going to get that one also, just needs a new battery.
How does this 12 volt transmitter work on less voltage? I ain't any lektrikal geenus so I don't know...but it works!
I know that those who are modern types will think "that old idiot, he don't know s%^& anyway" and all I can say to that is...while most are looking, waiting, spending money, and still waiting for "latest" to happen, I will be running r/c (not dead) trains with my old stuff and having a blast doing so.

...and so it is...
                  Woodie



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 Posted: Tue Nov 21st, 2017 10:08 pm
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Helmut
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Well done, Woodie. I modified the right lever by taking out its return spring and adding another leaf spring to hold the ratchet in position. So I could run two locos with it. One on channels 1/3 , and the other on 2/4 IIRC. The minimum voltage the unit will work from is somewhere around 7 Volts, because there is a standard 7805 providing the 5V system voltage. This IC needs some 2 V voltage drop between input and output to operate properly. ButI have to admit my JR is 2.4GHz

Last edited on Tue Nov 21st, 2017 10:09 pm by Helmut



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 Posted: Tue Nov 21st, 2017 10:31 pm
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Michael M
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Woodie,

What you have been doing in the past, and are still doing, is making RC simple and affordable for those (like me) that are restricted by a tight budget and little understanding of lectricity, but still want to enjoy the hobby with RC.

Your Mogollon is what got me interested in RC and building something outdoors.  With easy to understand information from Si and yourself I've managed to construct two locos with RC (even if my modeling skills need much improvement).

Keep that information coming!

Thanks!  :rah:


I still like that single-stall engine house.  Where did you get that smokestack?





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 Posted: Wed Nov 22nd, 2017 05:20 am
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Si.
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" I also have an old "Captain Kirk space pistol" transmitter which works well, but looks like ... homemade s%^# "



:cb:



It's logical to assume Jim
that the sudden 27 MHz time-warp
has brought us straight to this 1940s mining area.





My Starfleet space-pistol was lost going through the time-warp Spock


Don't worry Jim
It looked like homemade $4!7 anyhow
We're up against drunken miners here not the Klingon hoards anyway ...




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 Posted: Wed Nov 22nd, 2017 08:41 am
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W C Greene
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As McCoy reported to Kirk when he was at a 1960's hospital..."Jim, they're barbarians down here!"

Michael, the smokestack is a Grandt Line O scale detail. The part looked like a "dead ringer" for those on the real SCPA&M enginehouse. When I built the 3 stall and single stall structures, I had some left over from the 7 stall building. I don't remember the part # however.

Woodie



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 Posted: Thu Nov 23rd, 2017 12:40 pm
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William M
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Wonder what you could do with an old Futaba 9CAP!

Last edited on Thu Nov 23rd, 2017 12:51 pm by William M



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 Posted: Thu Nov 23rd, 2017 04:26 pm
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Helmut
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I couldn't resist to show you what I've done to a Planet T5 ( 5-channel plane ). I turned the right stick assembly around by 90°, and modified the mechanism to work like the left one. This is easily done, because they are the same parts. So the throttle levers are 0% in full down, and 100% in full up postion. They stay put wherever you leave them. The small lever switches above them are used to change direction. Thus you increase the speed setting resolution by 2 compared to the usual center-off affairs.
The horizontal lever movement is momentary with automatic reurn to center, and used to control the headlights. I control 2 G gauge BPRC locos with it when I happen to visit some open-house events and take them with me to show off what BPRC is.


And here is a blow-up of the right-hand side:


This modification doesn't take exquisite electrical skills, all what you need is a resistor of the same value as the pot ( all slight zero discrepancies can be compensated by using the vertical adjusters ), and a DPDT switch. Think I've shown how in an earlier thread.

Last edited on Thu Nov 23rd, 2017 05:06 pm by Helmut



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 Posted: Thu Nov 23rd, 2017 05:06 pm
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William M
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There is another RC tranny ..the F14 .Marine TX. It has a couple of  central lever operated controls   in addition to the usual gimbal types....not sure if its still in production ..but there are bound to be second hand out there. It can operate a whole load of additional functions IF you buy the add ons..Site below shows system

https://www.rcgroups.com/forums/showthread.php?1402247-Robbe-Futaba-Navy-F-14-transmitter-and-receiver

Last edited on Thu Nov 23rd, 2017 05:10 pm by William M



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 Posted: Thu Nov 23rd, 2017 05:55 pm
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W C Greene
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Ya can't beat a stick! You can still get a Futaba Attack xmitter through the LHS but they are over 50 bucks. The old 27 MHZ are very cheap (when you can find one). Neat mods to that xmitter Helmut. Older is (IMHO) better!

Woodie



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 Posted: Mon Jan 22nd, 2018 01:53 am
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Si.
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Howdy Woodie :w:




You said it was pretty cold with the garage door open at the moment.



When it's just so cold, that even the trusty Star-Fleet space-pistols FREEZE up ...



... the South Park R.C. snowmobile club, recommend these.



Super warm, fleece lined & available in hi-viz 'Kenny orange' !



:cool:



Si.



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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