Search found 26 matches
- Saturday 4th Dec 2010, 14:08
- Forum: CB Radio Modifications
- Topic: Super Swing into the Midland 79-893
- Replies: 0
- Views: 5527
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.
- Saturday 4th Dec 2010, 14:06
- Forum: CB Radio Modifications
- Topic: chipswitch needed for 2600
- Replies: 1
- Views: 4737
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.
- Friday 8th Oct 2010, 12:06
- Forum: CB Radio Modifications
- Topic: Panasonic RJ-3700 Low Freq Modification
- Replies: 1
- Views: 4768
Re: Panasonic RJ-3700 Low Freq Modification
UUUUUUUppppsssssssss!!!!!!!!
- Thursday 7th Oct 2010, 12:02
- Forum: CB Radio Modifications
- Topic: Panasonic RJ-3700 Low Freq Modification
- Replies: 1
- Views: 4768
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...
- Tuesday 5th Oct 2010, 9:25
- Forum: CB Radio Repair and Troubleshooting
- Topic: Emperor TS-5010 CPU Info
- Replies: 1
- Views: 5168
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...
- Friday 26th Sep 2008, 10:06
- Forum: CB Radio Repair and Troubleshooting
- Topic: rci 2990 base problems
- Replies: 2
- Views: 5900
- Friday 26th Sep 2008, 9:57
- Forum: CB Radio Repair and Troubleshooting
- Topic: 2950 TX issues
- Replies: 6
- Views: 9511
- Thursday 25th Sep 2008, 10:29
- Forum: Tech Area
- Topic: Need the Ameritron ALS-500 Export Amp Diagram
- Replies: 4
- Views: 10505
- Monday 22nd Sep 2008, 11:36
- Forum: Tech Area
- Topic: Need the Ameritron ALS-500 Export Amp Diagram
- Replies: 4
- Views: 10505
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...
- Monday 22nd Sep 2008, 7:09
- Forum: Tech Area
- Topic: Need the Ameritron ALS-500 Export Amp Diagram
- Replies: 4
- Views: 10505
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...
- Tuesday 26th Aug 2008, 9:44
- Forum: CB Radio Repair and Troubleshooting
- Topic: turner mic
- Replies: 4
- Views: 7364
- Wednesday 20th Aug 2008, 9:51
- Forum: CB Radio Modifications
- Topic: president washington base
- Replies: 3
- Views: 7034
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...
- Sunday 10th Aug 2008, 10:58
- Forum: CB Radio Modifications
- Topic: 2sc2999 and Schottky diode swap
- Replies: 22
- Views: 141702
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...
- Saturday 2nd Aug 2008, 10:43
- Forum: CB Radio Repair and Troubleshooting
- Topic: No power to channel Readout?
- Replies: 7
- Views: 10476
- Thursday 31st Jul 2008, 11:04
- Forum: CB Radio Repair and Troubleshooting
- Topic: Cobra 148GTL Issue.
- Replies: 3
- Views: 6569
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...
- Monday 28th Jul 2008, 10:42
- Forum: CB Radio Repair and Troubleshooting
- Topic: Cobra 2000 thinks it is a scanner
- Replies: 10
- Views: 13894
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 ...
- Monday 28th Jul 2008, 10:27
- Forum: CB Radio Repair and Troubleshooting
- Topic: weak recieve in a 139 xlr
- Replies: 11
- Views: 15329
- Saturday 26th Jul 2008, 11:00
- Forum: CB Radio Repair and Troubleshooting
- Topic: RCI2995 low output
- Replies: 4
- Views: 7442
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...
- Saturday 26th Jul 2008, 10:37
- Forum: CB Radio Repair and Troubleshooting
- Topic: weak recieve in a 139 xlr
- Replies: 11
- Views: 15329
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...
- Wednesday 5th Apr 2006, 12:11
- Forum: CB Radio Repair and Troubleshooting
- Topic: The Cobra 200GTL-DX problems
- Replies: 4
- Views: 12863
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...
- Thursday 23rd Mar 2006, 12:48
- Forum: CB Radio Repair and Troubleshooting
- Topic: The Cobra 200GTL-DX problems
- Replies: 4
- Views: 12863
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 p...
- Wednesday 22nd Mar 2006, 7:07
- Forum: CB Radio Modifications
- Topic: cobra 200gtl
- Replies: 6
- Views: 14509
- Tuesday 21st Mar 2006, 12:47
- Forum: CB Radio Modifications
- Topic: cobra 200gtl
- Replies: 6
- Views: 14509
- Tuesday 21st Mar 2006, 12:40
- Forum: CB Radio Modifications
- Topic: cobra 200gtl
- Replies: 6
- Views: 14509