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Kraft radio,receiver and servos

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Kraft radio,receiver and servos

Old 07-20-2009, 03:34 PM
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Tidnab
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Default Kraft radio,receiver and servos

I got this radio from a friend and neither of us know anything about it.The radio is a Kraft Sport Series with F.C.C. Tx Data KPT and 6A engraved on the plate on the bottom .It also has a serial number of 06447.It is in good shape,but probably the battery is shot.What is the toggle switch and slide switch on the top for?I also have a receiver and two servos which didn't come with the radio,but were in an old boat I bought.The receiver has Kraft Series Sevent-two on it and has seven ports.The servos are Kraft KPS-20H and KPS-24.Would this radio be usable and where could I get it checked out or fixed?Would the receiver and servos be usable with it?
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Old 07-20-2009, 04:10 PM
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fizzwater2
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Default RE: Kraft radio,receiver and servos

If I remember correctly, that's an AM system, and without the gold sticker on the transmitter (the 1991 sticker) it's probably considered a wideband transmitter, and wouldn't be welcome at most places to fly.

That, and chances are good it's still on one of the older 72MHz frequencies, which the RC band doesn't have the authority to use any more.

The switch and trim-like lever on the top were probably the 5th and 6th channels - the switch would be ch 5 for retract gear, the trim like lever channel 6.

It appears to be in physically good condition, and with new batteries, etc, would probably work. Whether or not it's legal this day and age would be a different question.

Old 07-20-2009, 04:37 PM
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Default RE: Kraft radio,receiver and servos

for the cost of new batteries and updates a new system would be cheaper.However if you want to use it radio south will service it for you they have two locations.They service all my kraft systems and keep them in top shape.
Old 07-21-2009, 10:36 AM
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Default RE: Kraft radio,receiver and servos

It would be a wide-band system, likely on one of the old channels. Both of those things make it illegal to use at all. Radio South may be able to put it onto a modern 72 MHz channel and modify the transmitter for narrow-band operation. The receiver will be usable, but not safe to use because it's also a wide-band unit. Narrow-band AM receivers on the current 72 MHz channels are rare, so you really have more of a collector's item than an actual usable system.

Also, as said above, it may actually cost you less to get a modern equivalent than to update the old Kraft. A modern system will also have much more in the way of features.

Kraft systems were excellent in their day, and I flew nothing but Kraft, until it was no longer feasible.

Old 07-21-2009, 01:14 PM
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Default RE: Kraft radio,receiver and servos

They usually had the frequency written on a shiny sticker on top of the transmitter by the antenna. It could be 72.080, 72.160, 72.240, 72. 320, 72.400, 72.960 MHz.

If that is a Series 72 receiver it should be setup for 3 wire servos. Prior to that (Series 71, 70, and Gold Metal) they used 4 wire servos with a center tap on the airborne pack.
Old 07-30-2009, 12:16 AM
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30choptop
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Default RE: Kraft radio,receiver and servos

I have the same Kraft Radio does anyone know what the transmitter Battery voltage is? I would like to see if my Radio works or not.
Old 07-30-2009, 10:07 PM
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Default RE: Kraft radio,receiver and servos

9.6v 8 AA's when you pull the batteries make sure it does not have the center tapp.
Old 07-31-2009, 12:33 AM
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30choptop
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Default RE: Kraft radio,receiver and servos

Thanks Larry, I hooked up a 9.6v and the old Radio works great.
Old 07-31-2009, 05:51 PM
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30choptop
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Default RE: Kraft radio,receiver and servos

I found out it works but there isn't room for 8 Sub C size Battery in the case, it is only 6.5" wide.
Is it possible this is a 6 volt transmitter?
Old 07-31-2009, 06:01 PM
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HighPlains
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Default RE: Kraft radio,receiver and servos

They used cells of about 600 mAh, not 1.2 Ah.
Old 08-01-2009, 07:43 AM
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Default RE: Kraft radio,receiver and servos

I get these from Batteries America for my Kraft radios. AP-1000SC 2/3 SC 1.2V 1000mAh .875" 1.025" 0.92 oz $3.10 ea.
http://www.batteriesamerica.com

For the Sport Series radio, wire them in series to get 9.6v. For the Series XX radios, they are wired in series/parallel to fit in the battery box.
Old 08-01-2009, 02:18 PM
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Default RE: Kraft radio,receiver and servos

As far as I know, those "A" series Kraft trasmitters worked on 6 volt, so they should carry 5 cells instead of 8.
Old 08-01-2009, 08:32 PM
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30choptop
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Default RE: Kraft radio,receiver and servos

HighPlains
Thanks for the Post

Michaelj2k
Thanks for the link for the Battery's

latinRClover
I tried the Radio out on 6 volts and it works, I don't plan on putting it in a Plane and flying it so I will keep the 6 volt in it.
Now I need to find a Charger for the 6 volt Battery.
Thanks for your help
Rick
Old 08-01-2009, 08:56 PM
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Default RE: Kraft radio,receiver and servos

Anyone bought Battery's from BMF? 1.49 for 1/2 Sub-C Size 1.2 Volt 750 mAh NiCad

http://www.bfmbatterysales.com/index...OD&ProdID=1754
Old 08-04-2009, 09:17 PM
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jdmachinery
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Default RE: Kraft radio,receiver and servos

My 1974 Kraft Sport Series 5 channel used qty 8 "1/2 SUB C' nicads. Factory wired these as 2 x 4 packs with a center tap, all incased in a large black plastic case in base of transmitter. Center tap supplies 4.8 vots to the system, so there should be qty 3 wires from battery to the system.

While this radio is no longer used for reasons stated above, I'll never toss it out!!
Old 08-21-2009, 10:05 AM
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Default RE: Kraft radio,receiver and servos

Funny thing that older Kraft radios were being discussed when I "googled" Kraft & RC. I Have a Kraft KPT-5 75-640 MHz radio system installed in a sailboat that was given to me by a dear friend's widow when he passed away. He was originally a flier, and built the boat in his later days. Question is; does this radio fall into the "do not use" catagory of broad band? My other boats all use a newer transmitter.
Old 08-21-2009, 03:39 PM
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Default RE: Kraft radio,receiver and servos

to answer your question yes and it is on an old frequency which is now illegal to use.
Old 08-21-2009, 03:53 PM
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Default RE: Kraft radio,receiver and servos

Frequency change not withstanding.... the "feel" of a Kraft radio is something the present day manufacturers only dream about. While the Sport Series radios were price point and a good value...I still have five Kraft radios that have either already been updated, or will be at some time. I don't know whether it was the weight, the way the gimbals felt or the balance in your hands, you just felt like you got what you paid for when you bought a Kraft. I am still kicking myself for never ordering a Kraft Signature series. I'll get one someday...hopefully. Anybody got one they want to get rid of ?? As the other guys said, Radio South can take of your Kraft radio very well. They will give you the options and the prices.... and you'll be supporting a company right here in the US...imagine that.. a US made radio serviced by a US company..... WOW.. what a concept....

Dan
Carolina Custom Aircraft


Old 08-22-2009, 08:05 AM
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Default RE: Kraft radio,receiver and servos

Deadstick.
the Mark lV tx has almost the same features as the signiture tx but not the cross trims.A series 73 thru 75 7z tx has the same gimbals and the cross trims of the signiture series without all the bells and whistles.I managed to get two signiture series tx one as a set with the syntheziser .Hope you know that if you have the fm module jr and airtronics fm rx will work with the tx.Good Luck with your search
Old 08-22-2009, 08:45 AM
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Default RE: Kraft radio,receiver and servos

I love Krafts and have been collecting them sense I came back to the hobby. I have been lucky finding 2 Signatures and 2 7c all FM one a channel master,2 narrow AM, and recent 2 Spectrum 6s that are FM bought for $10; I did not know they even had FM moduals for those. I have a 7z that will be mod for Kraft removable modul.
Old 08-22-2009, 11:03 AM
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Default RE: Kraft radio,receiver and servos

TIFF.
who is doing the mod work on the tx? I may want nto have that done as I have some extra fm module
Old 08-22-2009, 09:43 PM
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Default RE: Kraft radio,receiver and servos

I have a Kraft Series 73 (SS), two 79's (SS, DS), two 80's (SS, DS) and a Mk. IV SS with both AM and FM modules. I'm taking them with me into the next life. As for batteries, I get cells from Batteries America which is a 2/3 sub C that fits in the battery box. Batteries America also sells a ready made Sanyo 4.8 volt pack (CP-1300SCR) that's made up to go into the battery box. They also have a generic 1000ma 4.8 volt pack available. http://www.batteriesamerica.com/newp...tm#TRANSMITTER.
Old 08-23-2009, 06:42 AM
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Tidnab
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Default RE: Kraft radio,receiver and servos

The Radio,servos and receiver in the first post are for sale here on RCU,in case any of you collectors are looking for more Kraft items.
Old 02-15-2012, 06:57 PM
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Default RE: Kraft radio,receiver and servos

I have a kraft 5 ch. Series seventy seven. I open up the black battery box, had too remove a circuit board that was attached too it, any way there is 8 cells 4x2. Are these 1/2 sub c or 2/3 sub c?
Old 02-16-2012, 06:33 PM
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Default RE: Kraft radio,receiver and servos

2/3 sub C. Batteries America has them. Get the Sanyo 1300 ma. cells. As an alternate, take a look at the Sanyo Eneloop 2000ma AA cell. Wire them just like you do with the sub C's and fit them into the battery box.

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