GME TX3600 80 ch problems

[Rustuc]

Hi
I have a GME TX 3600, I have programmed it with an 80ch file. Problem is that it no longer receives on any of the channels?? Also the duplex on ch 1-8 doesn't work??
As I am fairly new to this stuff can someone help me out?
Is it a firmware update that is needed to be able to use it with the 80ch?

I have searched the forum for info but can't really find anything to help.

[Phantom]

I would suspect that maybe the duplex problem could be related to your file you programmed? Are you sure the details are set correctly in the file?

Have u set up the channel spacing correct?

[Rustuc]

I think I have worked out the duplex problem.
But as for the no RX im still not sure, I will also check for the correct channel spacings.

[Phantom]

The devil "could" be in the programming details you typed in?
I am sure this could be the case for the duplex
As for the RX side of things, double check that what you typed in is correct, the spacing correct and that you are listening to the right frequency - if you are used to listening on CH10, this could now have moved to, say, CH20 or something else - maybe match up the frequencies rather than the channels

Just some suggestions?

[Vkfour]

Yes, remember that the 80channels are interleaved. They run from ch 1 to ch 40, which have a 25 kHz spacing, than go back half way between 1 and 2 and then up at 12.5 kHz spacing..

[peteramjet]

Yes, remember that the 80channels are interleaved. They run from ch 1 to ch 40, which have a 25 kHz spacing, than go back half way between 1 and 2 and then up at 12.5 kHz spacing..

80 channel CB is 12.5 kHz across all channels, except channel 22/23 (being the data only channels).

25 kHz is no longer available on new radios and will soon be prohibited from use, technically making 40 channel sets unusable. Just like old 18 AM sets I don't think 25 kHz spacing will die off that quick.

[Comint]

Yes, remember that the 80 channels are interleaved. They run from ch 1 to ch 40, which have a 25 kHz spacing, than go back half way between 1 and 2 and then up at 12.5 kHz spacing..

What Vkfour is saying, is that frequency wise, the additional 40 channels are interleaved with the original 40 channels.

As in the following sequence:

1, 41, 2, 42, 3, 43, 4, 44, 5, 45, etc.

The original 40 channels had a 25 kHz spacing (and nominal 25 kHz bandwidth), and the additional 40 channels have a 25 kHz spacing (and nominal 12.5 kHz bandwidth), when taken in isolation.

However, the new 80 channel plan is a nominal 12.5 kHz bandwidth, and when merged together (interleaved), as shown above, they only have 12.5 kHz spacing between channels. So people who continue to use the Old 40 channel, 25 kHz spacing sets, will interfere with the adjacent New channels.

--
Comint

[peteramjet]

Yes, remember that the 80 channels are interleaved. They run from ch 1 to ch 40, which have a 25 kHz spacing, than go back half way between 1 and 2 and then up at 12.5 kHz spacing..

What Vkfour is saying, is that frequency wise, the additional 40 channels are interleaved with the original 40 channels.

I read it as the OP saying first 40 channels on 80 channel sets are still 25 kHz instead of 12.5 kHz spacing, but if that wasn't how it was meant to be read then happy days.

[Rustuc]

So tonight I checked all the channel spacings, all seems to be ok. But I can't hit the repeater around home, I have tx but still no Rx. I load in the 40cb channel option + programmed 80ch's. No Rx still. Wipe out the 80ch entries and just have the std cb 40 ch's and works spot on. Can get the repeater and talk on all channels????
I copied the 80ch file off a mates tx3600 and it does the same? Got me beat.

[Phantom]

I would still go back to what you are programming into the radio.
Have you checked all the settings prior to programming, checked the spacing of each frequency, checked the right details are in? Don't forget, the 80ch are set to narrow spacing.

If the radio works OK on an old file 40ch file, then I would suggest that something is not right during your programming of the 80ch file.
The radio will only do what you program it to do.
Are you 100% sure it is really TX on the right frequency and RX on the right frequency?

[Rustuc]

Phantom
I am pretty sure all my channel spacing is correct, I have checked it off a list I found on here.
The 16 duplex channels have different TX to RX, this is correct way to do it??
Is there any way I can send you the file to have a look at?
It really has me stuffed, I copy a file from a perfectly working 3600 with 80ch installed. Load it into one of mine and no good...

[Comint]

I think you also have to pay attention to the Serial Numbers of the radios.

The TX3600 has been around for quite a few years, and it is my understanding that early serial numbers were NOT capable of been converted to 80 channel operation.

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Comint

[Vkfour]

Phantom
I am pretty sure all my channel spacing is correct, I have checked it off a list I found on here.
The 16 duplex channels have different TX to RX, this is correct way to do it??
Is there any way I can send you the file to have a look at?
It really has me stuffed, I copy a file from a perfectly working 3600 with 80ch installed. Load it into one of mine and no good...

Yes, the TX and RX frequencies HAVE to be different, I concur with Mr Comint that your radio may be 40 channel only.

[Rustuc]

Yes, the TX and RX frequencies HAVE to be different, I concur with Mr Comint that your radio may be 40 channel only.

But they are meant to be a 99ch programmable radio aren't they??

[brianWE]

The 3600 was, originally, 40 channels.
I doubt they would have gone to 80 ch without changing the model number.

I believe the TX3620U replaced the 3600.....maybe that was the changeover model???

[swampy]

im hoping to do the same with my IC400 , hope i dont have the same problem , im not familiar with the GME software but does if have a section that you need to tick for narrow or wide band

[Comint]

The 3600 was, originally, 40 channels.
I doubt they would have gone to 80 ch without changing the model number.

I believe the TX3620U replaced the 3600.....maybe that was the changeover model???

I believe GME is still marketing TX3600 series radios, such as Models TX3600BW, TX3600D, and TX3600T.

Attached is a GME document listing Models that could be upgraded to 80 channels.

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Comint

GME_40_to_80_Channel_Instructions_2011-05-31.pdf

[brianWE]

I believe GME is still marketing TX3600 series radios, such as Models TX3600BW, TX3600D, and TX3600T.

Yes...the advertising says they are 40Ch sets. Not the straight TX3600, anyway.
No mention of upgrading.
Actually, I figure that, if they were upgradable, the factory would have done it.
Or, at least, the dealer.

[Vkfour]

But they are meant to be a 99ch programmable radio aren't they??

40 channel CB plus other channels for receive only.

[youngn]

But they are meant to be a 99ch programmable radio aren't they??

40 channel CB plus other channels for receive only.

It is a commercial GME, not just a CB