Search found 26 matches

by Unit 67
Saturday 4th Dec 2010, 14:08
Forum: CB Radio Modifications
Topic: Super Swing into the Midland 79-893
Replies: 0
Views: 1553

Super Swing into the Midland 79-893

I just need to know if there is some super talk kit for the Midland 79-893 and Many Thanks Anticipated.
by Unit 67
Saturday 4th Dec 2010, 14:06
Forum: CB Radio Modifications
Topic: chipswitch needed for 2600
Replies: 1
Views: 1615

Re: chipswitch needed for 2600

You can install the UC-1205 too.It is because there is no sellers right now and is more easy to find the UC-1205.There is a seller on E-Bay taht have a lot of the UC-1205 PLL for sale at great price.
by Unit 67
Friday 8th Oct 2010, 12:06
Forum: CB Radio Modifications
Topic: Panasonic RJ-3700 Low Freq Modification
Replies: 1
Views: 1707

Re: Panasonic RJ-3700 Low Freq Modification

UUUUUUUppppsssssssss!!!!!!!!
by Unit 67
Thursday 7th Oct 2010, 12:02
Forum: CB Radio Modifications
Topic: Panasonic RJ-3700 Low Freq Modification
Replies: 1
Views: 1707

Panasonic RJ-3700 Low Freq Modification

I am in the middle of the frequency modification of my Panasonic RJ-3700 radio.This radio came from the factory with the SM5104 PLL.I did the frequency modification and i have the coverage between the CB regular CB channels and the 10 Meter frequencies and this includes the 28.315Mhz. with the corre...
by Unit 67
Tuesday 5th Oct 2010, 9:25
Forum: CB Radio Repair and Troubleshooting
Topic: Emperor TS-5010 CPU Info
Replies: 1
Views: 1927

Emperor TS-5010 CPU Info

Hi to all;I have a big problem with my Emperor TS-5010 and i need to know if i can exchange the original PLL (HD614081) with the HR-2510 PLL(UC1250).It is because i bought this radio couple of days ago and i founded that this radio was used with the power cables inverted.The radio has couple of jump...
by Unit 67
Friday 3rd Oct 2008, 10:48
Forum: Tech Area
Topic: Can I put
Replies: 3
Views: 3640

If the Road Devil and your radio is in the original condition this combination is the correct:

Pssss;Remember to solder together the shield and the blue cable in the pin#1,next follow the rest of the pin out wiring as stated in my instructions.
by Unit 67
Tuesday 30th Sep 2008, 10:14
Forum: Tech Area
Topic: Can I put
Replies: 3
Views: 3640

Here is the Info:

Pin#1=Shield=Road Devil "Shield&Blue"
Pin#2=N/C
Pin#3=Transmit=Road Devil "Red"
Pin#4=Audio=Road Devil "White"
Pin#5=Receive=Road Devil "Black"
by Unit 67
Friday 26th Sep 2008, 10:06
Forum: CB Radio Repair and Troubleshooting
Topic: rci 2990 base problems
Replies: 2
Views: 2126

Im not trust any transistor tester when i work with the 2SC2312 or the 2SC1969 transistors.In sometimes the transistors read "Ok" when is really bad and i have three different transistors testers. Psssss;And you have to test your amp final transistors,because with 1 watt of output you should have ab...
by Unit 67
Friday 26th Sep 2008, 9:57
Forum: CB Radio Repair and Troubleshooting
Topic: 2950 TX issues
Replies: 6
Views: 3369

31:Can you check your 2SC2312 Final transistors?

It is because this is a very common problem in this type of radio when you have one bad or leaked of the 2SC2312 Final transistors!!!!
by Unit 67
Thursday 25th Sep 2008, 10:29
Forum: Tech Area
Topic: Need the Ameritron ALS-500 Export Amp Diagram
Replies: 4
Views: 4439

Go it!!!! Here is the mod for the ALS-500 Ameritron amplifier without the MOD-10M kit."The kit cost $29.95 plus S&H" 1.With the front of the amplifier facing to you in the left front side you have to locate 4 little towers. Note:The first and the third tower are grounded together via the chassis 2.M...
by Unit 67
Monday 22nd Sep 2008, 11:36
Forum: Tech Area
Topic: Need the Ameritron ALS-500 Export Amp Diagram
Replies: 4
Views: 4439

The amp has 4 2SC2879 final transistors and the input network of this amp is electronically controlled.Tomorrow i am going to make a direct jump between the Aux position and the first stage of the Pi-network for test if the SWR is OK.The input circuit of this amp looks exactly of the 15,20,40 Meters...
by Unit 67
Monday 22nd Sep 2008, 7:09
Forum: Tech Area
Topic: Need the Ameritron ALS-500 Export Amp Diagram
Replies: 4
Views: 4439

Need the Ameritron ALS-500 Export Amp Diagram

Hi at everyboby;I need the Ameritron ALS-500 Export type amplifier schematic.It is because i got one but this amp not have the 10 meters frequency modification.I got a lot of different types of Amateur Amplifier schematics and a lot of info about Amateur Amps modifications,but not for the ALS-500 am...
by Unit 67
Tuesday 26th Aug 2008, 9:44
Forum: CB Radio Repair and Troubleshooting
Topic: turner mic
Replies: 4
Views: 2829

1.Remove the back sticker.
2.Remove the cartridge screw.
3.Remove the cartridge from the base and adjust the screw.There is another screw behind the top of the front side of the cartridge base.

I use one side razor blade for remove the sticker!!!!!!!!!
by Unit 67
Wednesday 20th Aug 2008, 9:51
Forum: CB Radio Modifications
Topic: president washington base
Replies: 3
Views: 2844

If your Washington has the MB8719 PLL you can get so many extra channels as well as the Washington with the 858PLL too.The mods for the Washington with the MB8719PLL covers the 26.175MHZ to 28.045 with just couple of cuts in the PLL traces and with one six position doble pole switch from Radio Shack...
by Unit 67
Sunday 10th Aug 2008, 10:58
Forum: CB Radio Modifications
Topic: 2sc2999 and Schottky diode swap
Replies: 22
Views: 43144

When i have done the RX modification for improve the radio reception capabilities i uses the NTE23 transistor,because the NTE23 transistor is a high gain transistor and has a noise filtering on it,but the pin out is different. You will need to reorient the NTE23 transistor pins to work.I uses a piec...
by Unit 67
Saturday 2nd Aug 2008, 10:43
Forum: CB Radio Repair and Troubleshooting
Topic: No power to channel Readout?
Replies: 7
Views: 4123

You probably have a bad trace from the TR51 to TR41.This trace runs in the side of the board.
by Unit 67
Thursday 31st Jul 2008, 11:04
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 148GTL Issue.
Replies: 3
Views: 2680

Check first the transistor located in the side of your radio for a broken trace.There is a little trace that goes from the transistor to the front of your radio circuit and i founded many radios with this type of problem with a bad trace.Next you have to check the CB/PA switch for a broken wire in t...
by Unit 67
Monday 28th Jul 2008, 10:42
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 2000 thinks it is a scanner
Replies: 10
Views: 5709

Can you test this radio with another frequency counter? If your radio has the same problem with an external Freq. Counter you have to take a look for a crack or bad solder connection in the crystals.But if your radio is stable in frequency with an external Freq. Counter you have to test the D528 in ...
by Unit 67
Monday 28th Jul 2008, 10:27
Forum: CB Radio Repair and Troubleshooting
Topic: weak recieve in a 139 xlr
Replies: 11
Views: 5930

Yeap!!!!!!

You can find out the same info in the CBtricks.com link too.
by Unit 67
Saturday 26th Jul 2008, 11:00
Forum: CB Radio Repair and Troubleshooting
Topic: RCI2995 low output
Replies: 4
Views: 2799

I founded alot of this type of radios with a Corean Driver or final transistor.Take a look in the Driver (2SC2166) and in the Final (2SC2312).If the metal in the transistors is nickel in color you have a piece of Corean S???? transistors.The original Mitsubishi transistors or a good brand of transis...
by Unit 67
Saturday 26th Jul 2008, 10:37
Forum: CB Radio Repair and Troubleshooting
Topic: weak recieve in a 139 xlr
Replies: 11
Views: 5930

The TR5 is a high failure part in this radio.9 of 10 Cobra 138XLR and the Cobra 139XLR with a bad reception or no RX the problem is the TR5.The Dynascan Cobra company has a Service bulletin for the NO RX problem in this type of radios.I fixed one Cobra 139XLR today with the same problem.In this case...
by Unit 67
Wednesday 5th Apr 2006, 12:11
Forum: CB Radio Repair and Troubleshooting
Topic: The Cobra 200GTL-DX problems
Replies: 4
Views: 7135

This is a very usual problem in this radio.For example:If your radio has the peak Mod when you push the power swich at the Hi power position,the RF meter in the radio shows the RMS power,not the PEP power and the radio shows an incorrect SWR readings.But in the Lo power position,the RF and the SWR m...
by Unit 67
Thursday 23rd Mar 2006, 12:48
Forum: CB Radio Repair and Troubleshooting
Topic: The Cobra 200GTL-DX problems
Replies: 4
Views: 7135

The Cobra 200GTL-DX problems

Hi at all;I have in my shop 9 Cobras 200GTL-DX with the TX power problem in the Hi Position.I founded the problem."A bad Driver transistor".The driver part number is #RD16HHF1.I make a call at the Cobra service department,because this part does not have any replacement.The original Cobra part number...
by Unit 67
Wednesday 22nd Mar 2006, 7:07
Forum: CB Radio Modifications
Topic: cobra 200gtl
Replies: 6
Views: 8141

Now, when the radio warms up the radio has just 10 watts of output.I think this radio is a "Lemon". :cry: I have another Cobra 200 GTL-DX unmodified and I did the test and when is warm up the radio losses the output power,but just in the Hi Power. Unit 67
by Unit 67
Tuesday 21st Mar 2006, 12:47
Forum: CB Radio Modifications
Topic: cobra 200gtl
Replies: 6
Views: 8141

CBrules;I leave the info for the modification in your PM.








Unit 67

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