Search found 1040 matches

by Rick
Thursday 4th Dec 2008, 21:37
Forum: CB Radio Repair and Troubleshooting
Topic: President Jackson No TX No RX switching
Replies: 13
Views: 25288

President Jackson No TX No RX switching

TR33 must have been change at some time for the wrong one, as NPN would be switch on all the time and RX/TX would be in conflict. I have seen the TR33 fitted in the wrong way round a few times, after the transistor as failed. I use a 2SA1282 in most radios, which use this form of RX/TX switching. A ...
by Rick
Thursday 4th Dec 2008, 21:06
Forum: CB Radio Repair and Troubleshooting
Topic: Test your knowledge Uniden (President) Grant PC-409
Replies: 43
Views: 115391

Test your knowledge Uniden (President) Grant PC-409

His the B+ supply to the PLL and VCO free of noise and at the right voltage?
by Rick
Thursday 4th Dec 2008, 10:48
Forum: CB Radio Repair and Troubleshooting
Topic: President Jackson No TX No RX switching
Replies: 13
Views: 25288

President Jackson No TX No RX switching

What is the voltage at Pin 8 of the PLL (IC5)?
What happens if you unhook one end of R171?
by Rick
Thursday 4th Dec 2008, 10:34
Forum: CB Radio Repair and Troubleshooting
Topic: Test your knowledge Uniden (President) Grant PC-409
Replies: 43
Views: 115391

Test your knowledge Uniden (President) Grant PC-409

Has R104 a cold solder joint or o/c?.
Has C91 a cold solder joint or bad?
by Rick
Thursday 4th Dec 2008, 2:12
Forum: CB Radio Repair and Troubleshooting
Topic: Test your knowledge Uniden (President) Grant PC-409
Replies: 43
Views: 115391

Test your knowledge Uniden (President) Grant PC-409

What is the voltage at Pin 10 of IC2 on channel 19?
Cold solder joint around IC2?
Is the down mix at TP 10 the right frequency?
So Pin 1 of IC2 is noisy Yes?
Is there any noise on the supply line to Pin 1 of the PLL?
Has the VCO coil L19 unstable?
by Rick
Wednesday 3rd Dec 2008, 21:38
Forum: CB Radio Repair and Troubleshooting
Topic: Test your knowledge Uniden (President) Grant PC-409
Replies: 43
Views: 115391

Test your knowledge Uniden (President) Grant PC-409

If you inject 3.00 volts in to TP9 with one end of R207 unhooked, is the frequency stable and free of noise at TP10 or Pin 17 of the PLL?

Is the fault with one of the caps in the low pass filter (PD) C79, C80, or C81?
by Rick
Monday 1st Dec 2008, 21:05
Forum: CB Radio Modifications
Topic: EURO 3900 IRF520 conversion
Replies: 10
Views: 16500

EURO 3900 IRF520 conversion

When ask for any help it is always best to give the PCB number. If the radio is working ok, I would stay with the bipolar transistors as long as you can, it makes no sense just changing them just to gain a few extra watts. I may find the info you need is on http://www.cbtricks.com/miscellaneous/fet...
by Rick
Monday 1st Dec 2008, 12:32
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom,
Bingo, we have a winner.
It was C105.
On a cap test it show just fine, but with very hi impedance moving coil meter it show just under 1 meg.

Well done Scott.
by Rick
Monday 1st Dec 2008, 12:13
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom, I did say that all voltage regulators are ok, RX/TX switching is ok, All the components C170, D72, D73, Q35, Q37, C173, R214, R213, R215, R218 are ok. ------------------------------------------------------------------------------------------------------ Timrim, Zener diode D70 is ok, Q30...
by Rick
Monday 1st Dec 2008, 8:32
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom,
The carrier level shows instable on the spectrum analyzer.
There are no component leads touching each other.
There are no cracked traces.

The DC supply is not very clean at pin 8 (IC2) when viewed on a scope.

Scott, you are getting hot.
by Rick
Monday 1st Dec 2008, 5:01
Forum: CB Radio Repair and Troubleshooting
Topic: Stalker XX Squelch Delay
Replies: 13
Views: 19882

Stalker XX Squelch Delay

If you think, my last post was condescending its only because you do not understand. It is no good asking what the voltage should be, as this would not help you. How would it help you if I told you the voltage was too high or to low? It would be better if can tell me the voltages and then I can hope...
by Rick
Monday 1st Dec 2008, 2:59
Forum: CB Radio Repair and Troubleshooting
Topic: Stalker XX Squelch Delay
Replies: 13
Views: 19882

Stalker XX Squelch Delay

It is no good just replacing a component until you have tested them, this will not help you find the fault . To find out how to test component, do a Google search that may help you. I do not wish to be rude but if you do not know what you are doing, it would be best to take the radio to so one how c...
by Rick
Monday 1st Dec 2008, 2:18
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom,
Inject a clean 4.00 volt into TP2 did not help the signal at pin 10 of IC2 it was still noisy.
L15 alignment was ok.
by Rick
Monday 1st Dec 2008, 2:13
Forum: CB Radio Repair and Troubleshooting
Topic: Stalker XX Squelch Delay
Replies: 13
Views: 19882

Stalker XX Squelch Delay

I advised you the components to test on my 10th November post.
by Rick
Sunday 30th Nov 2008, 22:13
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom, You called this one a "Medium" level problem, you may want to change it to a "Tricky" instead Well I thought the fault was easy to sort out. I found the fault in less than 10 minutes with the aid of a scope, and the total job was 20 minutes, which included check and s...
by Rick
Sunday 30th Nov 2008, 9:43
Forum: CB Radio Repair and Troubleshooting
Topic: S-Meter not working
Replies: 6
Views: 11909

S-Meter not working

The KEPC-225D is the PCB number, the PLL is at the front of the radio near the channel switch and will have a number like uPD2816. As the S/RF meter is not working in RX and TX, would suggest that you have a common wire broken or you have the SWR/CAL switch in the in the SWR or CAL position and not ...
by Rick
Sunday 30th Nov 2008, 8:58
Forum: CB Radio Repair and Troubleshooting
Topic: S-Meter not working
Replies: 6
Views: 11909

S-Meter not working

Check the meter with a DVM on a diode test, and the meter should move. If the meter is ok then check you do not a cold solder joint or broken wire. If all is ok check the components, I would tell which components to check but you have not given the PCB number. It maybe a good idea to read www.radiom...
by Rick
Sunday 30th Nov 2008, 8:46
Forum: CB Radio Alignments
Topic: Adjust SSB offsets without test equipment ... (DX959)
Replies: 6
Views: 16780

Adjust SSB offsets without test equipment ... (DX959)

If your radio has a 2SC2166 driver then set the bias for 50mA using TP9 and TP8.
If your radio has a 2SC1969 final then set the bias for 100mA using TP9 and TP7.
Both bias are setup USB mode with no modulation in TX
by Rick
Sunday 30th Nov 2008, 2:12
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom,
The fault is still there with the frequency counter unplugged from J22.

I have check out a new 158EDX and R124 is indeed 10M and JP237 100R.

I think the Sch you have is for the ETP6900010Z, which was only in production for 4 years and is now some 10 year old.
by Rick
Saturday 29th Nov 2008, 23:59
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom, C99, R129, D42, D146, R130, and L47 are all ok. Lifting R126 makes no change the amount of noise at pin 2 of IC3. Scott, Thanks for pointing out my errors. I am not sure about (R124) I will need to check in a working radio. No early EPT690010Z diagram IC2 was marked with a part name (IC0...
by Rick
Saturday 29th Nov 2008, 22:47
Forum: CB Radio Alignments
Topic: Adjust SSB offsets without test equipment ... (DX959)
Replies: 6
Views: 16780

Adjust SSB offsets without test equipment ... (DX959)

Well this all made me chuckle. About setup using a receiver and a telephone. TP6 is only used to setup the carrier osc in SSB and only in TX mode. The AM carrier test point is TP5, which is the output of the Balance Mod IC6. Ranger has not fitted a TP6 for many years now, and you use the resistor R1...
by Rick
Saturday 29th Nov 2008, 22:37
Forum: CB Radio Repair and Troubleshooting
Topic: rci 2950 low power old version
Replies: 5
Views: 9234

rci 2950 low power old version

That is why I told you it was best to check the current being drawn.

It maybe the driver has a base emitter leak but I would check R258 and D92, R258 should be 2R2 or for people in the USA 2.2 ohms.

If R258 has gone hi also change C264 and C292.

I have seen R258 go up to 70 plus ohms.
by Rick
Saturday 29th Nov 2008, 22:17
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

Euhara, C95, C116, and C117 are all ok. ----------------------------------------------------------------------------------------- The Defpom, The signal at pin 10 of IC2 is noisy. RA3 and D149 are ok. R140 is the correct value. ------------------------------------------------------------------------...
by Rick
Saturday 29th Nov 2008, 12:21
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

Ramblingman,
The 10.695 MHz crystal filter is ok.
Even if the 10.695 MHz crystal filter was bad it would not explain, why the FM TX sounds off frequency, as the crystal filter is not used in FM.
by Rick
Saturday 29th Nov 2008, 12:13
Forum: CB Radio Repair and Troubleshooting
Topic: SS158 EDX 23mhz when turned on???
Replies: 11
Views: 16961

SS158 EDX 23mhz when turned on???

Bob,
The crystal in your radio should be just fine.
It should be a 10.24000 MHz, term I used 10.240 MHz in my last is just a general term for the 10.24000 MHz xtal.
by Rick
Saturday 29th Nov 2008, 12:05
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

The Defpom, The frequency at Pin 2 of the PLL is noisy if view on a scope. Inject voltage into TP2 did not help, still noisy, but looks ok on a frequency counter at Pin 2 of the PLL. C97, C98, TR29, TR28, and IC2 are all ok. The PLL IC3 and the 10.240 MHz crystal are ok. Note Maybe this one is a bit...
by Rick
Saturday 29th Nov 2008, 6:11
Forum: CB Radio Repair and Troubleshooting
Topic: SS158 EDX 23mhz when turned on???
Replies: 11
Views: 16961

SS158 EDX 23mhz when turned on???

If the radio is between S/N T70500000 and T70502000, change the 10.240 MHz crystal X1 and realign the PLL section.

On some radios, you may get away with just re-soldering the crystal, but it is best to just replace the crystal.
by Rick
Friday 28th Nov 2008, 8:50
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

Timrim, The Varactor diode D99, D100, and D148 are all ok. The Caps C103, C107, and C112 are all ok. Yes, the radios own frequency counter shows 10.695 MHz from time to time. There is no pattern to which channels was playing up, it can be Hi or Low band channels, it is total random. The radio was pl...
by Rick
Friday 28th Nov 2008, 8:26
Forum: CB Radio Repair and Troubleshooting
Topic: Stalker XX Squelch Delay
Replies: 13
Views: 19882

Stalker XX Squelch Delay

The PC-547 board is the sample, hold controller, and channel 9 squelch gate, which is part of the scanning system, it is not the main squelch, and the main squelch is on the main PCB. If you have adjust the per-sets on the PC-547 board you will upset the main squelch control, you will need to realig...
by Rick
Friday 28th Nov 2008, 4:54
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

Dxswe,
D53 is ok.
This diode is only used on AM and FM, and the fault is on all modes.
by Rick
Wednesday 26th Nov 2008, 4:16
Forum: Wanted !
Topic: Lincoln replacement switches
Replies: 8
Views: 13736

Lincoln replacement switches

Ok then do you have a email ad.
by Rick
Wednesday 26th Nov 2008, 4:12
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

What on one else trying.
Don’t tell me this is to hard.
by Rick
Wednesday 26th Nov 2008, 4:08
Forum: CB Radio Repair and Troubleshooting
Topic: RCI 2950DX problem
Replies: 14
Views: 18738

RCI 2950DX problem

Try doing the test in this thred.
by Rick
Wednesday 26th Nov 2008, 4:05
Forum: CB Radio Repair and Troubleshooting
Topic: rci 2950 low power old version
Replies: 5
Views: 9234

rci 2950 low power old version

Check to see how much current the PA stage is drawing, if low I would change the finals.

You could try unhooking the collectors of the finals and checking the current to see which final is low.

I have had the driver go low, but in most cases it is the finals.
by Rick
Monday 24th Nov 2008, 21:11
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

Timrim,
There are no bad soldering joints.
Re-Alignment did not help.
The voltage at IC2 is within 5%
The voltage at IC9 is within 10%
by Rick
Sunday 23rd Nov 2008, 2:22
Forum: CB Radio Repair and Troubleshooting
Topic: Test Your Knowledge Ranger Superstar 158EDX MOSFET model.
Replies: 40
Views: 223615

Test Your Knowledge Ranger Superstar 158EDX MOSFET model.

Radio: Ranger Superstar 158EDX MOSFET model. PCB Number: EPT690010D Condition: Stock Radio only modification 11-meter conversion. Symptoms: Frequency counter some times show 10.695 MHz on some channels, FM TX sounds off frequency, TX carrier not very stable. What is working: All voltage regulators a...
by Rick
Thursday 20th Nov 2008, 0:02
Forum: CB Radio Repair and Troubleshooting
Topic: Superstar 3000 low-recieve
Replies: 4
Views: 7614

Re: Superstar 3000 low-recieve

The SS3000 is known to suffer with bad soldering.
by Rick
Wednesday 19th Nov 2008, 11:51
Forum: CB Radio Modifications
Topic: Superstar 3900
Replies: 4
Views: 7963

Re: Converting Superstar 3900 to 10 meters.

You need the right test gear to do the job right.

RF signal generator (100 MHz).
RF power meter and dummy load
A standalone frequency counter (at less 6 digit).
10 to 1 probe
SINAD meter.

There are no short cutes
by Rick
Wednesday 19th Nov 2008, 11:46
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Kyle aka Pioneer621, I think you misunderstand me, I already know the answer to the fault, and it was just posted for a bit of fun. I have found some good faults with the President Lincoln and the HR2510 over the years. I have a quit a few more to post when I get my notes sorted out, some are real m...
by Rick
Wednesday 19th Nov 2008, 7:49
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Timrim, C130 is ok, this question had already been asked. Q124 is ok, this question had already been asked. ------------------------------------------------------------------------------------- Euhara, PA jack is ok. -----------------------------------------------------------------------------------...
by Rick
Wednesday 19th Nov 2008, 7:16
Forum: CB Radio Modifications
Topic: Superstar 3900
Replies: 4
Views: 7963

Re: Converting Superstar 3900 to 10 meters.

If your radio is fitted with the X2 crystal of 14.010 MHz then replace crystal X2 with 15.360 MHz.

You will need to do a full realignment on the radio.
by Rick
Tuesday 18th Nov 2008, 21:39
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Pioneer621, IC104: RX mode PIN-1 = 2.85vdc PIN-6 = 2.10vdc PIN-7 = 2.10vdc PIN-9 = 2.85vdc IC104: TX mode PIN-1 = 2.85vdc PIN-6 = 1.95vdc PIN-7 = 0.92vdc PIN-9 = 2.85vdc --------------------------------------------------------------------------------------------------- Timrim, L111 has not been adju...
by Rick
Tuesday 18th Nov 2008, 9:55
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Timrim, Q135 is ok. Check R168 and R169 and C135 all ok. -------------------------------------------------------------------------------------------------- Pioneer621, IC104: RX mode PIN 8 = 1.4vdc IC104: TX mode PIN 8 = 1.6vdc D147 is ok. ------------------------------------------------------------...
by Rick
Monday 17th Nov 2008, 21:10
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Pioneer621, Q125: RX Mode B = 8.00vdc C = 0.25vdc C130 is ok. Q125 is ok. Q136: RX mode E = 0.00vdc B = 0.05vdc C = 8.00vdc Q136: TX mode E = 0.00vdc B = 0.04vdc C = 8.00vdc ------------------------------------------------------------------------------------- Timrim, There is a very weak signal at t...
by Rick
Monday 17th Nov 2008, 9:20
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Timrim,
The signal is good at Pin 9 of the Mixer (IC106) and is 300mw 27.000 MHz, same as what is showing on the display.
The signal at the Base of Q134 is good at 190mw 27.000 MHz.
The frequency changes when you rotate the VFO knob.
by Rick
Monday 17th Nov 2008, 5:08
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Smokinjoe
I think you should re-read the answers as I think you have missed something.

Zodiac
There is on current being drawn.
by Rick
Monday 17th Nov 2008, 0:58
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Re: Test Your Knowledge (President Lincoln/HR2510).

Smokinjoe, There are volts at the Collectors of driver, and the final, and there are correct at 13.8vdc. Pre-amp which one is that? -------------------------------------------------------------------------------------------- Timrim, There is no RF signal at Q124. Check pin 5 of IC103 with an oscillo...
by Rick
Sunday 16th Nov 2008, 4:24
Forum: Wanted !
Topic: Lincoln replacement switches
Replies: 8
Views: 13736

Re: Lincoln replacement switches

You have a PM.
by Rick
Sunday 16th Nov 2008, 4:18
Forum: CB Radio Repair and Troubleshooting
Topic: Resurecting a TRC 457
Replies: 11
Views: 13938

Resurecting a TRC 457

As I did not get the right response from you, I cannot help you with this fault anymore. I assume this is now closed.
by Rick
Saturday 15th Nov 2008, 20:53
Forum: CB Radio Repair and Troubleshooting
Topic: Subject: Test Your Knowledge (President Lincoln/HR2510).
Replies: 35
Views: 246992

Subject: Test Your Knowledge (President Lincoln/HR2510).

Radio: President Lincoln & Uniden HR2510. PCB Number: PB-111 Condition: Stock Radio only modification 11-meter conversion. Symptoms: No TX power. What is working: The Driver and Final are ok. The Display show TX with key-up. The CPU/MCU board is working ok. All voltage regulators are ok. Skill L...