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-   -   3PK - Spektrum System (https://www.rctech.net/forum/radio-electronics/67107-3pk-spektrum-system.html)

skrivitz 04-04-2005 05:48 PM

Dremel
 
Or you could dremel the middle bar off and dremel around the outside of the gap and it looks very nice.

nimble 04-04-2005 06:11 PM


I was waiting for Nimble's response to Galifrey ....
I'm waiting for Paul Beard's response.

rskiba 04-04-2005 06:50 PM

Re: Dremel
 

Originally posted by skrivitz
Or you could dremel the middle bar off and dremel around the outside of the gap and it looks very nice.
Do you happen to have a pic of this mod - I would like to see what the "finished" cover looks like so I can decide which way I want to go with mine. Thanks!

danjoy25 04-04-2005 06:53 PM

Brushless compatibility????
 
Has anyone tried them with brushless controllers (hackers or schulze)?:confused:

Galifrey 04-05-2005 12:50 AM


Originally posted by nimble
I'm waiting for Paul Beard's response.
Well I haven't steered him here

:p

Here is your question...


Originally posted by nimble
Gailifrey, clearly you are not an engineer, and don't understand how analog signals become RF. Please ask Paul Beard to come on this forum and explain how his module can transmit FASTER than the rate in which his module gets the data to transmit.

and here was my answer...

It doesnt, 8ms is the speed the futaba servo reacts to movement under HRS...

Thats including the module overhead....

I guess what you are saying is spektrumrc are lying about the quoted speed, as I clearly posted their definition and their response time... measured not assumed...

I am not going to bring another to this argument as Paul designed the system for the 9ZHP and things have been tweaked a bit since then...

BTW the latency I have for the 3PK is 3ms to the rx module and the module takes another 5ms on average to get the signal to the rx and out again due to the lower frequency and the fact it modulates in FM not microwave digital... Kinda LP vs CD... LP ultimate resolution CD ultimate clarity and lack of distortion... except in this case spektrum have given us 4x the reolution as well... who would have thought..

It takes 1.5ms for the neutral pulse on a radio, therefore the latency is always a minimum of 1.5ms using a PWM/PAM/PPM signal does a digital signal take 1.5ms to register the change... No... theres the start of our reduction in latency at the RX already...

And no, I am no longer an engineer, I used to be a Royal Navy electronic engineering artificer... Now I work for a bank

:D

Just to add, clearly the servo will still be looking for a 1520usec neutral pulse (1.52ms) but the receiver wont...

;)

JLock 04-05-2005 06:49 AM

Thanks rwisejr for the pics with the modifications to the tx module cover. I will see if I can get another cover and modify that one.

JLock 04-05-2005 06:56 AM

Some of you guys slay me with this show of your technical intelligence. Most of us that post on this thread could care less about all of the technical nuances of the system as far as response times, times to transmit signals from TX to RX, etc, etc. Most of us here just want to know if it works in different applications and what problems fellow racers may be experiencing with it. The bantering back and forth does not solve anything, prove who is right or wrong, and clogs up the thread with information that only 1% of reader truly understand. That is information that should be debated in its own, special thread.

Galifrey 04-05-2005 09:17 AM


Originally posted by JLock
Some of you guys slay me with this show of your technical intelligence. Most of us that post on this thread could care less about all of the technical nuances of the system as far as response times, times to transmit signals from TX to RX, etc, etc. Most of us here just want to know if it works in different applications and what problems fellow racers may be experiencing with it. The bantering back and forth does not solve anything, prove who is right or wrong, and clogs up the thread with information that only 1% of reader truly understand. That is information that should be debated in its own, special thread.
Well thats your opinion...

anyway here is a pic of my modified cover... this is for peeps with a black version sans centre bar which actually wont fit over the module...

http://galifrey.my-bulldog.com/pages...trumfitted.JPG

:D

minidriver 04-05-2005 12:17 PM

Too bad they couldn't have made the module the same size as the Futaba module, it would have made the cover mod so much easier and neater. For some reason, the specktrum module is about .5mm thicker than the futaba module, so there is no way to just dremel out a slot for the new antenna and slide the cover back on the radio. I suspect that someone mis measured the dimensions of the thickness of the futaba module in designing the specktrum.

Still love the spektrum, and am slowly getting used to the new balance of the transmitter without the long antenna whip hanging out there.

rwisejr 04-05-2005 03:45 PM


Originally posted by JLock
Thanks rwisejr for the pics with the modifications to the tx module cover. I will see if I can get another cover and modify that one.

Cool glad to be of help !!!!!!!!!!!!!!

rskiba 04-05-2005 04:38 PM

so - besides dremeling for the antenna, does one have to dremel the inside of the cover to make room for the thicker Spektrum module? Does it not slide over the module after the antenna is relieved?

rskiba 04-05-2005 04:39 PM

Original 3PK
 
Is the cover thickness only an issue on the black synth 3PK?

nimble 04-05-2005 04:40 PM

minidriver, please send me email
website at nimblemotorsports dot com

thanks,

syndr0me 04-05-2005 05:15 PM

For what it's worth, the Futaba/Hitec module works as advertised in the Hitec Lynx 3D. Before you make jokes about the module costing more than the radio, let me say that I ordered this knowing full well I'd be getting a 3PK when the right deal came along. Until then, I'll be around for radio snobs to mock and disdain with my odd combo.

GundamWZero 04-05-2005 05:19 PM

I pick mines up tomorrow, along with the Airtronics M8. I have heard good things about this combination, so I'll stick with what works.


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