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Old 04-01-2007, 06:47 AM   #1
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Default GTB Speed Spectrum ESC

Any word on when the new GTB Speed Spectrum ESC (model#1711) is going to be available (Teamnovak)? I noticed that Novak's soon-to-be-released XBR Sport Brushed/Brushless ESC has built-in Li-Po Cut-Off circuitry. Will this feature be included in the new GTB also?

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Old 04-01-2007, 08:53 PM   #2
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The Spread Spectrum versions of the GTB started shipping to distributors last week--both of these GTBs include the new built-in, lipo cut-off circuitry.

Novak will be announcing updates to the original GTB later in April.

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Originally Posted by Pete Thomas
Any word on when the new GTB Speed Spectrum ESC (model#1711) is going to be available (Teamnovak)? I noticed that Novak's soon-to-be-released XBR Sport Brushed/Brushless ESC has built-in Li-Po Cut-Off circuitry. Will this feature be included in the new GTB also?

Thanks, Pete
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Old 04-02-2007, 08:32 PM   #3
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Are you talking about retrofits, or updates on new "non SS" versions of the GTB?
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Old 04-02-2007, 09:22 PM   #4
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Regarding Lipo cut-off voltage: Will this parameter be adjustable or fixed? The stand-alone versions Novak makes seem very conservative.

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Jimmy
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Old 04-03-2007, 12:18 PM   #5
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They are fixed 6.25 volts.

I think N2 means offering upgrades from the orignal GTB to the New GTB if so desired.

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Old 04-03-2007, 01:15 PM   #6
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Quote:
Originally Posted by g12314
Regarding Lipo cut-off voltage: Will this parameter be adjustable or fixed? The stand-alone versions Novak makes seem very conservative.

Thanks,
Jimmy
The Novak cutoff doesn't seem all that conservative. AFAIK, by the time a LiPo reaches 6.25 volts during a run, the voltage is decreasing extremely fast. The difference between 6.25V and 6.00V is probably only a couple of seconds.
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Old 04-03-2007, 05:32 PM   #7
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I can validate that. I just discharged a LiPo last nihgt on my carbon, watching the voltage the whole time. From 8.4 to 6.8 takes about 2-3 hours with a 1 amp discharge, but from 6.8 to 6.0 took less than 15 minutes. The voltage does drop rapidly as it nears the 6.0 volt mark. Besides, at 6.25 volts the car isn't worth driving anyway IMHO
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Old 04-07-2007, 12:55 AM   #8
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The GTB Spektrum is now available from Tower. Just shipped in
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Old 04-07-2007, 01:51 PM   #9
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Quote:
Originally Posted by Drewdc90
The GTB Spektrum is now available from Tower. Just shipped in
I just ordered one.
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Old 04-07-2007, 08:51 PM   #10
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What exactly is the advantage of having a circuit be so noisey that it will not work with crystal radios?

Will it effect the radios in other cars near by?
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Old 04-07-2007, 10:21 PM   #11
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http://www.teamnovak.com/products/es...rum/index.html
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Old 04-07-2007, 10:32 PM   #12
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Quote:
Originally Posted by NovakTwo

Novak will be announcing updates to the original GTB later in April.
HAve we found out what is involved in the update?
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Old 04-07-2007, 10:45 PM   #13
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Read it. Still not convinced that generating RF is a good thing or required to achieve performance. Yes switching fast can reduce heat, but good fets switch plenty fast without generating RF if done right. It is not as simple as fast=RF. It is a combination of things that cause it and it can always be filtered out with a little money and effort.

Novak should be embarrassed that they could not keep their unit from thermal shutdown without generating so much Rf that a crystal radio does not work well, and then telling us that this is a neat new feature.

Sorry, but we put up with so much bull in marketing and I am simply disappointed and insulted by this promo angle. I have always liked Novak products but this is not good engineering.

Last edited by factoid; 04-07-2007 at 10:57 PM.
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Old 04-08-2007, 02:02 AM   #14
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It wasn't necessarily made to stop thermals as thermals weren't really a problem with the old it was the motors. Most people had to run spektrum with the olds ones anyway so i don't think the RF will change anything.
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Old 04-08-2007, 06:28 AM   #15
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Quote:
Originally Posted by factoid
Will it effect the radios in other cars near by?
Thats the advatange of it. It runs cooler as you don't have to drive hard to beat the competition.
I was being sarcastic by saying that your esc will interfere with the other cars, there isn't really a performance advantage.
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Last edited by Drewdc90; 04-10-2007 at 12:32 AM.
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