TOPIC:

Jonny wrote:

Just became aware that the GR-24 2.4ghz reciever doesn't have BEC - so it can't be used directly with stock Tamiya ESCs.

It seem to be designed to run with up to 8,4V, so you should be fine ?
www.graupner.de...oduct.aspx

-Lars

larbut wrote:

Jonny wrote:

Just became aware that the GR-24 2.4ghz reciever doesn't have BEC - so it can't be used directly with stock Tamiya ESCs.

It seem to be designed to run with up to 8,4V, so you should be fine ?
www.graupner.de...oduct.aspx

-Lars

I meant the Acoms GR-24

Oh, sorry
Then it does seem like you are in need of either a separate battery box or a separate BEC unit...

All,
I have today started a new Category in the "Downloads" section of TamiyaBase for Vintage Radio equipment manuals.

I will fill in the manuals I have, and hope others of you do the same thing using the "Upload" function provided. ( here )

-Lars

Jonny, have you checked the Rx connection on a Tamiya ESC with a multimeter? - I'd be astounded if it wasn't putting out 5v, after all, that's what the internal electronics will be running on.
If you're sure the GR24 hasn't got some sort of built-in voltage regulation, another way around it would be to use either a LM7805 chip (Pence, 3-pin, easy) or one of Tamiya's pre-BEC Rx switches (The ones with a voltage regulator, as supplied with Hotshot etc). I MIGHT even have one kicking about somewhere

Oh, & whilst I'm thinking about it, someone in this post asked if there's such a thing as an Acoms AS3 servo - yes there is, it looks the same as an AS2, but works in the opposite direction & you usually find them on the old Hiluxs (1 of the controls has to work backwards, can't remember which)

eddrick wrote:

Jonny, have you checked the Rx connection on a Tamiya ESC with a multimeter? ...

No, I just assume everything I see on the internet is true

This is a nearly flat 7.2 NiMH pack hooked up to a TEU101 ESC - the multimeter probes are in the RX out lead & the voltage is exactly what the battery is delivering - 7.7v.

I'm dumbfounded by that! "Why" is the question.... I thought the whole purpose of having an Rx power connection on an ESC was to supply 5v & do away with Rx packs & eliminators, otherwise all you'd need is the signal & ground-bonding, so why the 3rd wire? My Mu's got a 101BK in it & an older (Non-BEC) Rx, interested to know why it hasn't fried now....

Whilst we're on the subject, here's a partial datasheet for the LM7805 regulator chip I've been banging on about. Pence to buy, small & simple. Poke battery voltage in on pin 1 (Up to 30v I think), connect pin 2 to battery -ve (& RX -ve) & it puts out 5v at up to 1A on pin 3 (Power to your Rx). At the small voltage change & current throughput, it won't need a heatsink & could be sevo-taped on top of the Rx etc

Can I use an ARC 227 receiver with a TEU104BK ESC? I just picked-up a Techniplus AP227 MK3 and it came with the ARC 227. Not sure if I need an MSC for this or a battery box? Any ideas out there.