CB volume not coming from speaker - radio is good


Information and questions on GL1100 Goldwings (1980-1983)
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mpj220
Posts: 14
Joined: Tue May 04, 2010 11:18 am
Location: Grafton, Ma
Motorcycle: 1983 GL1100Aspencade
1977 GL1000 Goldwing

CB volume not coming from speaker - radio is good

Postby mpj220 » Tue May 04, 2010 12:27 pm



Hello all!

I just picked up a 1983 Aspencade.

While going through the radio electronics, I found that the CB radio doesn't always activate the "SP" light.
When I turn it on, it will light the "SP" light for a brief moment and I will hear the CB through the speakers.
It then shuts off the "SP" light and nothing is heard from the CB.
The FM radio still works fine.

If I turn the CB off and on many times, perhaps 1 out of 50 times it will actually keep the "SP" indicator lit on the display and all appears to work normal - If FM is playing and I lower the CB squelch, the CB overrides the FM radio and is on the speaker.

If I put my ear close to the fairing, I can hear a relay clicking at the same moment the "SP" goes out.

I am assuming that "SP" means "speaker". It seams that it wants to send audio to headsets that I don't have.

I tried searching for info but, have not found anything.

Any ideas would be appreciated.
Thanks!!



mpj220
Posts: 14
Joined: Tue May 04, 2010 11:18 am
Location: Grafton, Ma
Motorcycle: 1983 GL1100Aspencade
1977 GL1000 Goldwing

Re: CB volume not coming from speaker - radio is good

Postby mpj220 » Tue May 04, 2010 4:10 pm

Found my own problem.

The button for speaker operation at the bottom of the CB section of the radio seemed to not be working properly.
I took the CB section of the head out and found that the push button really had no operation. It was stuck in one position and when checking with a metewr - it showed around 180 ohms.

Soldered a short on it and speakers are up and running.

I am not worried about headset as I don't have any and probably won't get any.

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thrasherg
Posts: 1837
Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: CB volume not coming from speaker - radio is good

Postby thrasherg » Tue May 04, 2010 4:13 pm

Well done, I would try and replace the switch myself as sometime in the future I can gauarntee you will need to use the switch and you will have forgotten that you shorted it out or you will be angry with yourself because you did short it out.. Worst case solder another switch in parallel and mount it somewhere convenient...

mpj220
Posts: 14
Joined: Tue May 04, 2010 11:18 am
Location: Grafton, Ma
Motorcycle: 1983 GL1100Aspencade
1977 GL1000 Goldwing

Re: CB volume not coming from speaker - radio is good

Postby mpj220 » Tue May 04, 2010 7:07 pm

I will keep an eye out on feebay - maybe score a head unit.

If I had a part number for the switch - it would be an easy fix.
Maybe dig through some radio shack drawers - perhaps get lucky.

Now if I can get a bit more reception. The antenna doesn't have much of a ground plane.
I get much better signal be putting my hand on the antenna mount - providing a bit of a ground plane.
I wonder if I could find a round chrome disk - it may help.

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WingAdmin
Site Admin
Posts: 17046
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: CB volume not coming from speaker - radio is good

Postby WingAdmin » Wed May 05, 2010 11:15 am

I'm really surprised with the reception I get - although I replaced my antenna with a new one from Sierra-MC after I (ahem) closed the garage door on the original one and broke the load coil in half.

That said, I wasn't getting much signal out until I adjusted the SWR on the new antenna - and now I get excellent signal reports.

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gordonv
Posts: 168
Joined: Sun Oct 04, 2009 6:39 pm
Location: Richmond BC
Motorcycle: 1988 GL1500
1999 GL1500CF
1982 GL1100A

Re: CB volume not coming from speaker - radio is good

Postby gordonv » Thu May 06, 2010 1:36 pm

WingAdmin wrote:That said, I wasn't getting much signal out until I adjusted the SWR on the new antenna - and now I get excellent signal reports.


SWR? What is that? I'm not getting very good reception on my 82', but haven't foiund anytime to go through the connections, remove, clean, and put back together with some bi-electric grease just in case.

User avatar
WingAdmin
Site Admin
Posts: 17046
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: CB volume not coming from speaker - radio is good

Postby WingAdmin » Thu May 06, 2010 1:48 pm

SWR is Standing Wave Ratio. When the CB transmits, part of the radio wave transmitted bounces back from the end of the antenna. How quickly it bounces back depends on the length of the antenna. If it happens to bounce back in a way that the bounced wave cancels out the transmitted wave, it can kill your output power. Similarly, if it happens to bounce back in a way that it adds to the transmitted wave, it boosts your output power. The way this is adjusted is by lengthening or shortening the antenna (which is why there are little set screws on the top of the load coil), and the way it is measured is with a SWR meter, like this:


SWR Power Meter

Because Honda used non-standard connections for the CB, you also need adapter cables like these:


SWR meter cables

I thought for sure that I had written up a "How to" article on adjusting the SWR on your CB, but...it turns out that I haven't. I'll add it to my list of things to do.

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gordonv
Posts: 168
Joined: Sun Oct 04, 2009 6:39 pm
Location: Richmond BC
Motorcycle: 1988 GL1500
1999 GL1500CF
1982 GL1100A

Re: CB volume not coming from speaker - radio is good

Postby gordonv » Fri May 07, 2010 1:09 pm

I believe you might have mentioned it before, but as I don't even know if my CB is working, and since I'm not planing on using it, it didn't stick.

With 4 bikes at home, trying to sell 2 of them, so I can start to enjoy riding the other 2, there seems to be no time to do anything bike related. I haven't even installed my front floor boards and heel-toe shift yet on my GL1100, but did get around to install one side of the floor boards and heel-toe shifter on my GL1500CF (Valk IS), but that was 3 nights ago.




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