GL2Way - Loud Squeal on TX - GL1800Riders
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post #1 of 16 (permalink) Old 10-15-2011, 03:03 PM Thread Starter
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GL2Way - Loud Squeal on TX

Greetings!

This is mainly for Pedro, though anyone who knows the answer can chime in.

My GL2Way has been working perfectly on CB and GMRS for weeks now. But just yesterday it started transmitting a loud squeal when transmitting. This squeal is barely audible as a sidetone in my headset but it is actually way louder to the people with whom I am communicating. They report that it is about 10X louder than my voice.

Last night I took the unit out of the trunk, checked all the connections and put it back. The squeal was gone. This morning, the squeal was back. I have checked all the connections in the trunk including the antenna ground and found nothing.

Suggestions appreciated.

Best Regards,
Lee E. Brown

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post #2 of 16 (permalink) Old 10-15-2011, 08:51 PM
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Lee

Most likely positioning or routing of your FRS cable try unplugging it and then we can move from there

We have also seen faults with lower headset cables do this so try testing without a headset connected

Pete

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post #3 of 16 (permalink) Old 10-15-2011, 11:03 PM
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another possibility

Not pre-empting a message I'll be sending to Pete concerning an update with some issues with mine and a buddy's, but I recently gained a part-time squeal in mine and here's what I found today while investigating. Again, this is not to preempt or over-ride anything Pete has on the subject.

My squeal was an intermittent thing, and I noticed it seemed to do it less when rainy/humid (the wetness seems to improve the grounding, more about that below). Two usual suspects with squeal are routing of the antennae cable near the other inputs (FRS, headset and/or GPS, especially without ferrite cores installed), and a not so great ground.

Took my seat off, hooked up a battery charger (not a tender) to give me full voltage to the radio while testing without the engine running, and proceeded to check.

Found that I would not have a squeal when putting my fingers on the antennae inline connector from the radio's cable to the antennae's cable. Hmmm. My fingers were acting as a capacitive ground for the connector. (cable is shielded too well for it to work when touching the cable). Unhooked the connector, tip was a bit dirty, cleaned and reinstalled. Same symptom. Unthreaded the cable from the ratholes going from inside the trunk to behind the passenger seat and put them inside the trunk. Minor improvement.

Then I hooked an additional temporary ground from the FM antennae grounding bolt to the frame chassis. More improvement. Moved the ground point from the antennae bolt point to the grounding nut that’s on the side of the GL2WAY to the CB unit. Whalla – seems to have cured the issue.

I’m letting it sit overnight, and will retest in the morning. But the main improvement seems to have been the additional ground from the main gl2way unit to the chassis. I’ll probably leave my antennae cable routed inside the trunk, at least for now without a decent reason to put it back through the “normal” ratholes.

Another separate item I’ve noticed with the FRS radio system. The molex connectors that Pete needs to use has some issues with connectivity. Have found our FRS’s would stop working, noticeable when transmitting. First thought it was a bad Push-to-Talk switch, disassembled and cleaned, no improvement. Swapped our FRS radios, noticed with one of them when the PTT was pressed the TX indicator on the radio would sort of fade in-and-out. The other radio’s display didn’t do that, but also wouldn’t actually transmit either like the other one. Removed and re-installed the FRS molex at the gl2way, resolved that problem. A dirty molex connector prevented the transmit signal properly getting to the FRS. End result, also check your connectors at the gl2way.

Different issue we're tracking down. My buddy’s radio seems to work sometimes normally, other times the transmit volume drops real low. On our last ride, his volume started out fine, then later dropped real low (he could still hear me fine). Then later it went back up high, then stopped transmitting and receiving completely. We haven’t had a chance to get back together and do some troubleshooting, he’s on the memorial 1K ride right now, will test later and hopefully have a troubleshooting update.

Hope this long narrative is of some help.

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post #4 of 16 (permalink) Old 10-16-2011, 01:21 AM
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Great reply it's only with feedback like this that we can learn what happens out in the world and in this case hopefully how to resolve it

As for the MIC level thing sounds like an AGC thing have you changed any of the MIC level settings on that radio

Pete

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post #5 of 16 (permalink) Old 10-16-2011, 05:14 PM Thread Starter
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Greetings!

In my case, disconnecting the 2nd radio cable cured the squeal. And I discovered something else, possibly related, at the same time: the wires broke off right at the GL2Way connector. They broke right where the insulation was stripped back, which may have been caused by a mis-adjusted stripping tool.

Anyway, I will need to buy another 2nd radio cable. I can return the old one if you guys want to examine it.

Best Regards,
Lee E. Brown

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post #6 of 16 (permalink) Old 10-20-2011, 01:12 PM
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I called Pete with some of the same issues.

I have an early issue unit. He stated that in the early issue units that if you go up/down on the squelch, that it will do the same thing as pushing the transmit button three times quickly. But, it will not let you know that you have shifted over to the other radio with the beeps.

So, he sent me a FedEx shipping label and asked to have it sent back for reprogramming with the newer software. AND he is throwing in a mic input from my Zumo 660 for the aggravation without me asking for one!

Impressed. Will see how the fix works.

And for the Command Master Chief, thanks for the info on the squeal. I will try moving my ground wire as you recommend.

Will be a while until I get my unit back, but I'll let you all know how things work out.

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post #7 of 16 (permalink) Old 10-20-2011, 01:17 PM
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Not garanteeing anything on the MIC interface with that 660 but its free give it a try

We keep looking at the grounding on the units and try to incorporate any feedback from users

The FRS switching we always thought would be harder for users to do but guess what you all proved us wrong

Pete

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post #8 of 16 (permalink) Old 10-22-2011, 01:17 AM
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I too have a loud squeal now on transmit. I've had the unit for almost a year and about a month ago it started squealling. Now more often than not. I've check the cables and the ground. Still squealing.

Any ideas? Where should i go from here? What to check next? I have not yet tried adding a grounding cable from the connecting nut to a seperate ground on the bike. Should I try that, like SSNCOB did above?


Thanks,

David W.

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post #9 of 16 (permalink) Old 10-22-2011, 02:05 AM
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Quote:
Originally Posted by dfwpilot View Post
I too have a loud squeal now on transmit. I've had the unit for almost a year and about a month ago it started squealling. Now more often than not. I've check the cables and the ground. Still squealing.

Any ideas? Where should i go from here? What to check next? I have not yet tried adding a grounding cable from the connecting nut to a seperate ground on the bike. Should I try that, like SSNCOB did above?


Thanks,

David W.
Has anything on the bike changed have you added anything or removed anything It is most likely that something has changed have you got coiled cables to the unit likely a ground is moving etc especially if you were OK before

Check your antenna especially the base where the whip screws in if the inner gets loose you can lose the ground there intermittently this is most likely your issue if nothing else has changed, I also noted from your pictures you have the armrests that fit through your antenna mounts when you fitted these did you fit the antenna grounding strap and not the one that comes with the armrests as those do not conduct a good ground it may of worked for some time but now may not be making contact.

A low battery can also cause noises as can a bad SWR make sure you test with the engine running and check your antenna tuning

Do you have an FRS cable or GPS cable attached, if you do disconnect them

If you don't have any extra cables and a squeal without them or after you disconnect try disconnecting your headset we have seen some breakdown in headset cables cause issues

Since you bought your unit we have added extra filters to combat noise you may need to add them

We also have new software you may want to upgrade and we can check the unit out for you contact me via our website

Pete

"What is now proved was once only imagined."
William Blake






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post #10 of 16 (permalink) Old 10-24-2011, 08:59 AM
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Pete and the rest of the GL2way gang,

It appears I have fixed my problem. I did two things. I moved the ferrite filters around as suggested and I moved the CB ground to the other side.

All is clear now. Went for a pretty good trip yesterday with my friend and I had NO squealling at all. crystal clear all day long.

I honestly think in had everything to do with the ferrite filters, as I had moved the ground earlier in the week with no good results.

Thanks everyone!!




Quote:
Originally Posted by pedro66 View Post
Has anything on the bike changed have you added anything or removed anything It is most likely that something has changed have you got coiled cables to the unit likely a ground is moving etc especially if you were OK before

Check your antenna especially the base where the whip screws in if the inner gets loose you can lose the ground there intermittently this is most likely your issue if nothing else has changed, I also noted from your pictures you have the armrests that fit through your antenna mounts when you fitted these did you fit the antenna grounding strap and not the one that comes with the armrests as those do not conduct a good ground it may of worked for some time but now may not be making contact.

A low battery can also cause noises as can a bad SWR make sure you test with the engine running and check your antenna tuning

Do you have an FRS cable or GPS cable attached, if you do disconnect them

If you don't have any extra cables and a squeal without them or after you disconnect try disconnecting your headset we have seen some breakdown in headset cables cause issues

Since you bought your unit we have added extra filters to combat noise you may need to add them

We also have new software you may want to upgrade and we can check the unit out for you contact me via our website

See you on the road,

David W.
MSF-RiderCoach (Texas)
2006 Titanium GL1800 Gold Wing
Double DarkSider #202
IBA #: 48781
Front: Bridgestone Battlax BT-45 130/70/18 @ 38 psi
Rear: Falken Ziex 912 195/55/16 @ 44 psi
Why use a Car Tire??......Because I Can! and...http://www.murgie.com/dsi_roster.txt
My Blog: http://dfwpilots.com/therapyon2wheels/
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