Search found 9 matches

by alyxlyon
Friday 30th May 2008, 21:44
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

Heres IC4 values (RX is without TR33 on board, since when it's installed the CB is stuck at transmit)

______TX___RX__
pin 6 4,68v 4,00v
pin 7 4,30v 1,92v
pin 8 7,82v 8,25v
by alyxlyon
Friday 30th May 2008, 8:46
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

No change, only high pitch sound is now constant steady and really loud, both transmit and receive leds are glowing a bit. Red glows a bit more than green. I reinserted the original transistors and the sound is precicely the same as begin with. When I put roger beep on both leds starts to flash rapi...
by alyxlyon
Friday 30th May 2008, 7:49
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

Yes, I'm pretty sure TR33 is ok, found D71 but where is D41 located? Nvm, found it.
by alyxlyon
Friday 30th May 2008, 1:25
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

Emitter voltage is 8,50 +-0,1v and I checked transistor and it seems to be right. Measured wrong. So Emitter and base values are around. Now, what drops Base down to 3.37v? And the sound I hear when tr33 is installed sounds like capacitor charging, high pitch sound with increasing pitch, just like c...
by alyxlyon
Thursday 29th May 2008, 20:12
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

TR33

TR33 is now 2SB892 replacing 2SB1035 (original transistor that was in the radio), according to ECA transistor book 892 is simular to the 1035 and pin polarity is PNP, also pin order is suppose to be E-C-B Is B892 facing right way when its on a same position as in the picture of previous post. (That ...
by alyxlyon
Thursday 29th May 2008, 11:42
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

Voltage values

Ok, maybe I should've posted the voltage values in the first place. So here they are (with original TR32 and TR34 and replaced TR31 and 33, since it stopped transmitting constantly after I put the new transistors in). TR31 E RX 7,48 TX 0,02 - C RX 8,50 TX 7,47 - B RX 6,84 TX -0,04 TR32 E RX 0 TX 0 -...
by alyxlyon
Wednesday 28th May 2008, 23:28
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

Still issues, but faint receive

Ok, I have replaced TR31-34 and both 25v 1000uf caps, also D66 and resistors seem to be ok. It still doesn't work. Now I hear electrical fuzz, transmit doesn't work at all. When I transmit with other CB I hear the sound extremely faintly from PJ speaker and theres an extra sound that sounds like bzz...
by alyxlyon
Wednesday 28th May 2008, 9:35
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

Re: Presiden Jackson Stuck in TX.

Try removing TR33, if this cures the problem then replace with a new transistor. Yeah, was reading about that, was going to measure the voltages (found a thread in here that you have replied to), but then I came accross a problem with schematics and the PCB, PCB has typo error in it . theres 2 TR11...
by alyxlyon
Wednesday 28th May 2008, 7:38
Forum: CB Radio Repair and Troubleshooting
Topic: Presiden Jackson stuck on transmit
Replies: 15
Views: 23238

Presiden Jackson stuck on transmit

Hi! I have a problem with my PJ Model - President Jackson (A-F band version black faced) PCB - PB-042AE PLL - Don't know (Kinda new to this stuff) I think its MC145106 maybe Radio is stuck on transmit. It has been modified with following mods: hxxp://www.radiomods.co.nz/presidentjacksonmods.html It ...