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Hitec Optic 6-receiving problems

Old 03-04-2007, 02:44 PM
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lenn
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Default Hitec Optic 6-receiving problems

Hi,
I have a problem with my new Optic 6. When I install the servos to the receiver (HFS-05S) and switch it on, the servos are only jittering and not responding at all. When I walk 2 meters away, they stop jittering and nothing happens. The remote and the receiver batterys are fully charged! [sm=confused.gif]
Has anybody of you guys an idea what the problem can be?
Hoping on help,
Lennart



(please copy this to the Hitec customer service)
Old 03-04-2007, 03:01 PM
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JohnBuckner
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Default RE: Hitec Optic 6-receiving problems

The 05 is a single conversion rx. Are you using the Hitec single conversion rx crystal? A dual conversion crystal will not work.

Have you selected FM (PPM) modulation type in the Tx rather than SPCM? The 05 is FM(PPM)

If you have the single frequency Tx module does the Rx crystal match the channel numbers with the Tx module?

If you have the Spectra synthesized module have you removed it and set the channel number to match the Rx crystal?

The 05 is auto shift so there should be no problem whether or not your Tx is set to negative or positive shift. For the record the Optic is capable of operating on both shifts so purchasing a selectable or auto shift Rx is redundant.




John
Old 03-04-2007, 03:14 PM
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lenn
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Default RE: Hitec Optic 6-receiving problems

Hi John,
thanks for your quick answer!
I am using the PPM mode. My crystal is the one that came with the package. I have the basic package with four HS-325HB Servos.
Don´t now whether its a single conversion crystal or not.
Old 03-04-2007, 03:52 PM
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Default RE: Hitec Optic 6-receiving problems

If you bought everything as a package You should have the proper crystal however mistakes can happen.

The Hitec dual conversion 72 band crystals have purple or blue stripes on the pull tabs. The single conversion crystals on the 72 band have green stripes on the pull tabs.

Wich module do you have, if it is the Spectra synth module have you removed it from the back of the Tx and set the channel number that matchs you crystal?
Old 03-04-2007, 04:00 PM
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lenn
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Default RE: Hitec Optic 6-receiving problems

The crystal is 35 Mhz like the receiver, so that should probably fit. But the crystal has a blue stripe at the end.
Old 03-04-2007, 04:15 PM
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Default RE: Hitec Optic 6-receiving problems

Your Tx has a small removable box about 2 by 2 inchs and maybe a 3/4 inch deep. Its right in the middle of the back of the Tx. What does it say on this box (module)?
Old 03-04-2007, 04:26 PM
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lenn
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Default RE: Hitec Optic 6-receiving problems

There it says RF MODULE and HPF-MI
Old 03-04-2007, 05:46 PM
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Default RE: Hitec Optic 6-receiving problems

What I am trying to find out is this a 35 Mhz module to begin with or is it a 72 Mhz module that someone is sticking 35 Mhz crystals in. If so I beleve that is not going to work.

Here are some truisms if you are switching crystals:

TX and Rx crystals are not the same and cannot be interchanged.

Single conversion and dual conversion Rx crystals are not the same and cannot be interchanged.

Changing a crystal in a Tx whether or not it is a module type will cause some detuning effect on the output and it should be retuned. If you are tying to change too an entirely different band from say 72 to 35 by just switching crystals then nothing is likely to work.

Was this package new and was it sold as a 35Mhz unit?
Old 03-04-2007, 05:59 PM
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lenn
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Default RE: Hitec Optic 6-receiving problems

Yes, it was new and sold as an 35Mhz package.
The Module is a 35Mhz Module. But I don´t gnow whether the crystals are single or dual conversion.
Is there a way to find this out?
Old 03-04-2007, 06:34 PM
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lenn
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Default RE: Hitec Optic 6-receiving problems

I have to go now.
Thanks alot for your help today John
[sm=thumbup.gif][sm=thumbup.gif][sm=thumbup.gif]
Lennart
Old 03-04-2007, 07:54 PM
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Default RE: Hitec Optic 6-receiving problems

Sorry I can't help with the ID of the crystals on the 35 band for this you need to talk to your supplier.

Remember if you start swapping crystals in a module type tx you are defeating the purpose of a module type Tx in the first place. The idea of a module system is to quickly and easily change a tx frequency with no need to retune. This can be done because the entire RF section is within that module. Switching from one module to another of a different frequency requires no tuning.

John
Old 03-05-2007, 11:53 AM
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lenn
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Default RE: Hitec Optic 6-receiving problems

Dear administrator, please copy this thread to the Hitec customer service forum page.
Old 03-06-2007, 04:38 AM
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Default RE: Hitec Optic 6-receiving problems

Did you buy a package of Optic 6 that has a receiver and servos and seperatly HFS-05S, if you did that receiver crysltal that came with it will not work it's dual conversion.
Old 03-12-2007, 08:11 PM
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lenn
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Default RE: Hitec Optic 6-receiving problems

Hi,
does anybody know where I can buy a 35Mhz single conversion crystal?
Thanks for all your help
Lennart
Old 08-09-2007, 10:06 PM
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BMonee
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Default RE: Hitec Optic 6-receiving problems

This is a common problem with this radio. I have experienced it even after being serviced by the manufacturer. The quality of this product is horrible. It's just a bad product.

BMonee

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