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How do I get my transistor 3005 radio to work

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  • wa2yyx Jan 27, 2015

    Hi James collinson, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?

  • James Walker
    James Walker Mar 10, 2015

    What kid of radio? Does it turn on? Any lights? Meter movement. ?

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Turn it on.

Posted on Mar 16, 2015

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1 Answer

Power and audio mod


I don't recommend ANY changes to the output power more than 4W on AM of a stock CB radio. The output transistors can be run a bit harder, but the likely hood of them dying is much greater. Manufacturers are cheap, they aren't going to put a 20W transistor in when there are much less expensive 5W transistors. If you want more RF power, then you need to change the PA transistor for one with more power handling capability. You should look for one with more gain as well.

If it is a SSB radio that you are trying to "peak", changing the BIAS settings for the driver and PA transistors is not a good thing. The bias level sets the transistors to their optimum setting for linearity. Changing the bias will not increase your output power, but it will stress the transistors. These transistors are not exactly cheap.

I work on lots of radios and the ones where the "Golden Screwdriver" have touched usually cost 2-3 times as much to repair when they die. And they will die.

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1 Answer

140 gtl has no dead key no tx audio and no tx light pa works,all works. No ssb or am tx plz help


Check for voltage at the driver and final transistor when radio is keyed--a sure way here is to unsolder with no power all three pins on driver and final and check them with a ohm meter or transistor checker--look for a open ebc or a shorted one.

If before you do that check for a direct short to the board ground (not the metal frame of radio but the metal cans) from the center pin on each transistor (driver and final)

You could find one transistor is shorted or OPEN--if so both must be replaced.

Jun 15, 2012 | Radio Communications

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HP 3005 MOVING TONER TO ANOTHER 3005


Sure.... never should be a problem.....Each toner cartridge has a memory card and informs the printer of the amount of toner left.

Dec 07, 2011 | HP LaserJet P3005 Printer

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I would like to replace the stock 2SC1969 bipolar transistor with a ERF2030 mosfet transistor in a Galaxy 93T.Can anyone tell me if any caps need to be removed on the amp board since C203 and L33 are not...


The radio you listed "Galaxy DX-93T Base CB Radio" utilizes a 2SC2290 final transistor. This is not a T220 2SC1969 and you cannot install an ERF2030. This is a round and white looking transistor. Replace it with only the same transistor.

Mar 11, 2011 | Galaxy Radios DX-93T Base CB Radio

1 Answer

My Philips DVD DVP 3005 won't play any sound. The picture is absolutely fine though. What can I do?


Find out the protection transistors between buffer ic 4558 and sound output rc socket and remove them and also check both + / - 12V on ic 4558

Thanks & regards
Shrinath inde
maharashtra india

Dec 28, 2010 | Philips DVP-3005 DVD Player

1 Answer

Tr51 gets hot


This is part of a Darlington Amplifier section of voltage regulation to the Final transistor it may be getting hot for various reasons one you may be taxing its resources by long key downs or you may have too much voltage going into the radio it should only be supplied with 13.8 Volts Maximum more than that (Volting the Radio) Will over work thhis transistor and eventually burn it out.

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1 Answer

Not transmitting or receving (transistors burnt out)


if its not transmitting or receiveing its probably a problem in the power supply or antenna/coax.The big transistors you see inside are the output transistors for the transmitter section and would not effect the receive. Does it pick up static with the squelch is open? if so the audio section probably works ok.Have you tried a watt meter with a dummy load to see if the transmitter is working?Before you change components you have to narrow down what section is not working and know why its not working otherwise the new transistors could just blow too if its transistors that are bad.more information is really needed to diagnos the problem.

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1 Answer

No am power


Radio dude, What you have is a blown am regulator. The sideband side does not use the mentioned transistor. They use a few different numbers here for the am regulator. One of them is a 2sc1419. On the Uniden Grant they put the transistor on the rear right above the antenna jack. On the 148 they put the transistor back in the right rear of the radio as your looking inside on the speaker side. Fixing it includes unsoldering the transistor and purchasing a replacement and resoldering it back in. This transistor is bolted to the side rail in the rear. I usually use a ECG152 as a replacement. It's not unusual to blow this one if the radio has been tuned. Let me know if your comfortable swapping it out. Otherwise it needs to go to a shop with a decent tech that won't take you to the cleaners. Let me know,, Mechanic

Feb 20, 2008 | Cobra 148 GTL 120-Channels Base CB Radio

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