Cobra GTL 2000 Power up Issue

[KneeBiter]

LC,

I decided to first test continuity on the switch terminals before attempting the solder junction.


BK WHT RED

#1 | | #2


#3 __ __ #4


#5 | | #6



Here is what I got when I tested continuity.

Terminals ON OFF
4-6 1 0.00

2-4 0.037 0.063

3-5 1 0.00

1-3 0.00 1



So in the OFF position there is still continuity from pin 2 to 4 on the red side which I assume is hot but keep me honest. Then in the ON position there is not full continuity! Your thoughts?

I am questioning this switch now more than ever based off these readings.

The simplest test is to just jump out the switch. Less is more. Easy stuff first.

 

[loosecannon]

you won't find any voltage on that switch.
it switches the ground side.
your readings look fine if i understand them correctly.

please try the test on the AC/DC switch on the back of the radio from my previous post.
LC

 

[Handy Andy]

please try the test on the AC/DC switch on the back of the radio from my previous post.
LC

 

[AJAY0618]

you won't find any voltage on that switch.
it switches the ground side.
your readings look fine if i understand them correctly.

please try the test on the AC/DC switch on the back of the radio from my previous post.
LC

LC,

You are definitely on to something with this switch. Rather than solder it I user alligator clips on the front terminals. Well, what happened will tell the tale.

1. CB band is perfectly illuminated
2. AM does not illuminate but LSB and USB do when I switch to them.
3. The counter is on but moving through numbers randomly.
4. The meters are not illuminated and could be bad lamps.
5. I can switch between counter and clock and I can observe and extra barely flashing digit after the minute digit.
6. The clock does not seem to be counting time.

I may need to change caps on the counter as well but before that this switch looks like it needs a change.

Arthur

 

[KneeBiter]

LC,

You are definitely on to something with this switch. Rather than solder it I user alligator clips on the front terminals. Well, what happened will tell the tale.

1. CB band is perfectly illuminated
2. AM does not illuminate but LSB and USB do when I switch to them.
3. The counter is on but moving through numbers randomly.
4. The meters are not illuminated and could be bad lamps.
5. I can switch between counter and clock and I can observe and extra barely flashing digit after the minute digit.
6. The clock does not seem to be counting time.

I may need to change caps on the counter as well but before that this switch looks like it needs a change.

Arthur

I believe you said you noticed faint display lit with power off. I'm too lazy to go back and read. That is a symptom of blown meter lamps in this particular radio. New lamps cures that.

 

[AJAY0618]

I believe you said you noticed faint display lit with power off. I'm too lazy to go back and read. That is a symptom of blown meter lamps in this particular radio. New lamps cures that.

Yas that is correct. How can I get new lamps or should I go with LEDs?

 

[KneeBiter]

Yas that is correct. How can I get new lamps or should I go with LEDs?

No LED's. I know some people like them. They are a headache. Just get new grain of wheat 12v lamps. You can get a bag of them on ebay cheap. https://www.ebay.com/itm/3945982374...d=link&campid=5336136228&toolid=20001&mkevt=1