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FARIDAY SCREEN - 7/13/2008 7:54:15 PM   
971wright


 

Posts: 566
Joined: 12/17/2007
From: nelson, UNITED KINGDOM
Status: offline 		Hi Guys Has anyone screened there motors with wire mesh to create a fariday screen to cut interferance with radio? Would it help ?Or would it be a waste of time ?I have a panzer 3 the range is bad tried allsorts of different ariels no change range is about 60ft if this is a none starter will have to change to 2,4ghz was hoping to keep this one 27mhz cost on radios is very expencive .





regards pete
       Post #: 1

RE: FARIDAY SCREEN - 7/13/2008 9:30:33 PM   
fv432



Posts: 1629
Joined: 1/12/2007
From: swindon, UNITED KINGDOM
Status: offline 		Hi Pete not sure if this helps mate but one of my PZ3's had crap range also
when i pulled it apart i found the aerial lead had been trapped between a screw fixing and basically cut the inner wire in half

replaced the wire and back to top range again


Regards Rob

_____________________________

1/25panther/jagdpanther 1xhl Tiger 2xhl Bulldog 1xT34 wsn 2xhl pz111 3xm26pershing 1x1/16 tam sherman
1xm46 Tamiya kin

(in reply to 971wright)
       Post #: 2

RE: FARIDAY SCREEN - 7/13/2008 10:08:52 PM   
971wright


 

Posts: 566
Joined: 12/17/2007
From: nelson, UNITED KINGDOM
Status: offline 		Hi Rob Tried just about everything new boards different ariels different motors . still stays about the same must be the schurzen blocking the signal or R.F. from motors which cant dispate because of schurzen it looks like will have to change to 2,4ghz when Ifit the dbu /dbc wanted to keep it 27mhz am but needs must dont have any problems with any other tank ,think ill fit a recoil unit at same time .Just thought Iwould ask the Question in case im missing some thing need one of them electomagians to say if it would cut R.F.when you think about it there are 7 motors inside the panzer3. 2 drive motors 1cooling fan 1 smoke unit 1 turret turn 1 elevation motor 1 gun motor . plus radio gear 2 batteries now ive got to find room for the dbu/dbc units and wiring also if another reciever .its going to look like the inside of the wifes handbag .


best regards pete

P.s looks like one of the batteries is coming out to make room .

(in reply to fv432)
       Post #: 3

RE: FARIDAY SCREEN - 7/13/2008 10:38:55 PM   
gigantohawk


 

Posts: 256
Joined: 12/15/2007
From: HuddersfieldWest Yorkshire, UNITED KINGDOM
Status: offline 		Hi Pete, I've been away a while trying to make sense out of this Credit Crunch Nightmare. However, have you tried the Pzrwest Aerial Coil. It worked a treat for my PZIII.

Regards,

Nick

_____________________________

Tamiya M4 Sherman...Heng Long Panzer III.

(in reply to 971wright)
       Post #: 4

RE: FARIDAY SCREEN - 7/14/2008 10:15:37 AM   
971wright


 

Posts: 566
Joined: 12/17/2007
From: nelson, UNITED KINGDOM
Status: offline 		Hi Nick Yes tried coil ariel started with 1/4 wave length then 1/8 wave still no joy standard ariel still have range of 60ft. this has me scratching my head dosnt mater what I try still the same.thats why Iwas thinking the schurzen was blocking in R.F. from motors and interfering with radio .




best regards pete

(in reply to gigantohawk)
       Post #: 5

RE: FARIDAY SCREEN - 7/14/2008 1:26:14 PM   
heavyaslead



Posts: 836
Joined: 11/18/2002
From: Loganville, GA, USA
Status: offline 		The capacitors on the motor lead provide the interference protection. A Farady Cage will do little to no good for this application.


_____________________________

Cheers
Eric Scott

(in reply to 971wright)
       Post #: 6

RE: FARIDAY SCREEN - 7/14/2008 2:03:45 PM   
Wozwasnt


 

Posts: 757
Joined: 8/3/2006
From: St Helens, UNITED KINGDOM
Status: offline 		I think that some of it may be down to the transmitter.

I could run my Tiger to about 100 foot without an aerial on the tank. But one day I dropped the transmitter and it smashed, no problem, I thought, I've got others. But my three other transmitters will only work to about 50' even with an arial on the tank.

It's not really that much of problem because I don't run it that far from myself (I'm too lazy to walk to it if it gets stuck).

_____________________________

Modded HL Tiger 1, HL Panther, 2x HL Pz III''s, HL M-26, WSN T34, Scratchbuilding a Jagdpanther.

(in reply to heavyaslead)
       Post #: 7

RE: FARIDAY SCREEN - 7/14/2008 2:25:12 PM   
fv432



Posts: 1629
Joined: 1/12/2007
From: swindon, UNITED KINGDOM
Status: offline 		Pete
been thinking on this have you tried connecting aerial to the schurzen plates ??

Rob

_____________________________

1/25panther/jagdpanther 1xhl Tiger 2xhl Bulldog 1xT34 wsn 2xhl pz111 3xm26pershing 1x1/16 tam sherman
1xm46 Tamiya kin

(in reply to Wozwasnt)
       Post #: 8

RE: FARIDAY SCREEN - 7/14/2008 4:44:26 PM   
971wright


 

Posts: 566
Joined: 12/17/2007
From: nelson, UNITED KINGDOM
Status: offline 		Hi Rob yes tried it done about everything different motors new capacitors new boards different transmiter this problem only started after fitting schurzen .so if the schurzen is causing the drop in range must be either stopping signal which it cant be because it works or it is not letting R.F. disipate if you like the schurzen is turning into a fariday cage .so the only way I can see to stop this is make a fariday cage around the drive motors ,then the R.F. will be contained and shouldnt interfere with radio. I cant think of anything else really need a radio ham who knows alot about what causes a reduced signal strength .


best regards pete

(in reply to fv432)
       Post #: 9

RE: FARIDAY SCREEN - 7/14/2008 4:55:30 PM   
fv432



Posts: 1629
Joined: 1/12/2007
From: swindon, UNITED KINGDOM
Status: offline 		tough one mate but i reckon your right with the schurzen

probably don't want to do this but why not re-make the panels from plastic instead ??

I'll go away now LOL


Kind regards rob

_____________________________

1/25panther/jagdpanther 1xhl Tiger 2xhl Bulldog 1xT34 wsn 2xhl pz111 3xm26pershing 1x1/16 tam sherman
1xm46 Tamiya kin

(in reply to 971wright)
       Post #: 10

RE: FARIDAY SCREEN - 7/14/2008 9:39:46 PM   
gigantohawk


 

Posts: 256
Joined: 12/15/2007
From: HuddersfieldWest Yorkshire, UNITED KINGDOM
Status: offline 		Pete mate. Not wanting to disrupt your line of thought on this issue and believe me it's making my head hurt as well. But from my recollection a Faraday Cage needs to be grounded for it to function. In other words if your Schurzen is mounted on plastic and not "earthed" then it won't behave like a Faraday Cage. So your loss of signal range is due to other factors.
Try re-locating the aerial coil to an area within your tank that is away from electro-magnetic forces.

Let me know how you get on.

All the best mate,

Nick.

_____________________________

Tamiya M4 Sherman...Heng Long Panzer III.

(in reply to fv432)
       Post #: 11

RE: FARIDAY SCREEN - 7/14/2008 10:12:00 PM   
heavyaslead



Posts: 836
Joined: 11/18/2002
From: Loganville, GA, USA
Status: offline 		You know thinking about it again, the schurzen could act like an RF trap.

If the schurzen is metal and mesh of appropriate dimensions, it could act as a sink for RF signals.

If the schurzen is non-metalic that would aleviate the issue.


_____________________________

Cheers
Eric Scott

(in reply to gigantohawk)
       Post #: 12

RE: FARIDAY SCREEN - 7/15/2008 1:19:14 PM   
971wright


 

Posts: 566
Joined: 12/17/2007
From: nelson, UNITED KINGDOM
Status: offline 		Hi Heavyaslead this is my line of thinking ,thats why Iwas thinking of sceening the motors with mesh to reduce R.F .




regards pete

(in reply to heavyaslead)
       Post #: 13

RE: FARIDAY SCREEN - 7/15/2008 5:22:17 PM   
darkith


 

Posts: 498
Joined: 2/19/2007
From: Fredericton, NB, CANADA
Status: offline 		I've heard of heli pilots improving range by shielding their RXes with tinfoil (presumably by keeping the RF out). So it's possible that trapping the RF by wrapping the motors might help...but in some ways their already wrapped in cans, so the leakage would only be at the brush housing and through any cooling slots.

Course, if you insulated the RX with electrical tape or something, you could try wrapping it with foil as well.

D.

_____________________________

RCU Required Disclosure: Manufacturer of DBC battle circuit for Heng Long tanks.

(in reply to 971wright)
       Post #: 14

RE: FARIDAY SCREEN - 7/15/2008 6:41:13 PM   
123Splat


 

Posts: 409
Joined: 4/27/2007
From: Austin, TX, USA
Status: online 		To my way of thinking, Heavy's right about the 'Faraday Shield'. It would have to be grounded, not floating to have any positive effect. Otherwise, it is just an antenna for the RFI from the motor brushes. I think the same l