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I have a Teaberry Stalker one, the polarity was reversed it burnt a diod wich i can get but there are 3 tunning coils which melted the wax and are no good, they are L8 L5 L10 what are they and can i get them somewhere?

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No. If they are coils of 22 or 24 gauge wire- no. They would still be potentially usable if the varnish has not carbonized.

If these were common to ground as pass filters and the same size, they should be 47 micro henry. If they were the IF cans- scrap the radio. The amount of work involved is more than the radio is worth. In large part because there is more than just those parts involved.

This is what is easy to find
http://www.cbtricks.com/radios/teaberry/stalker_one/index.htm
There is a possibility there were two versions- pre and post 40 channel

Posted on Feb 25, 2012

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SOURCE: i just purchased a teaberry stalker 1x and

Sorry I am so far away but sound like the clarifier is open, that is it works on transmit. As you talk to your friends try to move the clarifier a bit at a time to see if it will track with them.

Posted on Feb 13, 2010

Testimonial: "thanks i will try that i am not used with working just the clarifier thanks for answering my problem"

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What is the main function of a reverse polarity diode, what would happen if it was blown


Hi,
a diode in reverse polarity could be used e.g. for protecting some circuit against improper polarity of supply. It could be connected in serial - but it is in forward polarity - (disadvantage: voltage drop) or in parallel - reverse polarity - with a fuse in serial to supply. This way is often used with Zener diode - protection against overvoltage in addition. Try to google e.g. "how to protect against improper polarity". For this type of protection could be used special types od diodes - transils - they could be one- or bidirectional. In case of a diode failure, the supplied circuit may not work - it depends on the way of diode connection and type of its failure - short circuit or disconnection. But there is many diode application: try https://en.wikipedia.org/wiki/Diode https://en.wikipedia.org/wiki/Diode#Applications
Jiri

Apr 24, 2017 | Radio Communications

Tip

Shorted Rectifier Diode (fuse keeps blowing)


jdvillanueva_14.jpg
This CRT tv is dead set, no reaction when the power button is pressed(no standby led light). I've open the back panel and check the faulty parts.
jdvillanueva_15.jpg

As you can see the fuse was badly burnt-out indication of excessive current due to short circuit.
jdvillanueva_17.jpg

I've checked the parts feeding the AC line to the power supply board (Power cord, VDR, Ceramic capacitor, Coil, Posistor, Degaussing coil) one by one and I've found out that one of the four rectifier diode has a leak which caused the glass fuse burnt-out.
Here's how to test the rectifier diode.

Good Diode
Note : Forward and reverse bias depend on what type of ohmmeter are you using, here I'm using a Japan Standard(Sanwa Brand).
jdvillanueva_21.jpg

Using an ohmmeter set it to X10 to see much easier the leak from the diode in reverse bias.

Forward Bias : test the diode by connecting the red test prod of the tester to anode and then the black test prod to cathode of diode. You will see the pointer will reads a faily low resistance(above picture).
jdvillanueva_22.jpg

Reverse Bias : test the diode by connecting the red test prod of the tester to cathode and then the black test prod to anode of diode. You will see at the picture(above) that the pointer didn't react (remains in infinity). This is a good diode.


Bad(leaky) Diode
jdvillanueva_23.jpg

Forward Bias will reads fairly low resistance.
jdvillanueva_24.jpg

Reverse bias unlike the good diode the pointer will also reads a fairly low resistance.

After confirming that the diode caused the fuse from blowing I've decided to replaced all four diodes since I have a lots in my stocks.
jdvillanueva_25.jpg

Remember that when you installing the new diode on the board, make sure that you will make it in the right polarity.

jdvillanueva_26.jpg

This steps is also applicable in the DVD Player,Flat panel, Projection, LCD TV, you have to disregard only the posistor and degaussing coil.

Have a nice day!
Thanks for using Fixya.

Jdvillanueva

on Mar 02, 2011 | Televison & Video

1 Answer

My TrueTone 23 channel CB won't power on when I plug it in to my truck. Everything seems to be connected properly. How do I fix this?


first check to see if the power cable wire is indeed working.make sure the fuse in the fuse holder isn't burnt . make sure there is power to where your wires are connected , fuse box or cigarette lighter plug .If there is power going to the radio then you need a volt ohm meter . You may have a burnt out reverse polarity diode . It is located where the power cord comes into the radio from the inside. It should be the only diode there but just in case check them to make sure it is a barrel shaped black diode. If it is burnt replace it and your radio should come on.

Apr 15, 2015 | Radio Communications

1 Answer

Hooked my cobra 200 gtl dx backwards fri


check for the reverse polarity diode,it will be in the area of the power wires . If the diode is burnt ,replace it.

Jun 14, 2014 | Radio Communications

1 Answer

I just purchased a teaberry stalker 1x and


Sorry I am so far away but sound like the clarifier is open, that is it works on transmit. As you talk to your friends try to move the clarifier a bit at a time to see if it will track with them.

Jan 31, 2010 | Uniden Bearcat Pro PC68XL 40-Channels Base...

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No sound


the polarity was reversed and semiconductors are burnt at the output of the unit.

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1 Answer

The Panasonic cordless phone that I had a negative 12v power supply. I accidently applied a positive power and found fumes from the equipment. I opened to see that the IC which could be the rectifier...


First of all you must understand the power interface circuit.Mainly it has two line filter coils at very much start after the DC in socket, they usually get burnet when connected to the reverse supply rail, if you have these filter coils replace them first, if do not have, just bypass them.After these coils, rectifier IC can be found, it is rectangular in shape, has four connections, looks like an SMD IC, about 5 mm at lenght , 3 mm at width, this can simply be replaced with four diodes in bridge configuration.You can easily identify its pins configuration by tracing the tracks. The connections going to the DC socket are input and interchangeable, the other side tracks are connected to the regulation section and can be identified with an electrolytic capacitor fixed directly to the connections of rectifier.The polarity identification is directly read from the capacitors polarity.Check upto this stage & email me after testing the power interface section with the model number.

Aug 08, 2008 | Panasonic Lands Phones

1 Answer

Need schematic diagram, some advice and ultimately replacement parts


You have something in short circuit in power supply pattern, so filter coils are burnt. It may be voltage regulator, or regulating transistor, electrolytic capacitor or even shorted diode at pwr. input serving to protect in case of inverse polarity applied. Check all for short. Was it reverse polarity or overvoltage occured?

Mladen,
mladen@propilots.net

Mar 18, 2008 | Lowrance GPS

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