Recent content by PETERpH

I have them all correct, I even verify the schematic. I constantly keep on going back to this point. Where TR-13 point 14 should be 0v but there is 9.43v all the time. at TR13 squelch range it should be .65v-8.11 open squelch is 9.43 close is 8.13v I don't think it should be like that, not...

Hi Andy. I am comparing capacitor direction from the image you send me from inside your radio. I know as C232 ground (-) on my radio is facing away from the radio chassis but yours (I am not sure) is facing the chassis. Do you have an other image from the section near the TA7222? to compare the...

Once I fix it or buy an other Audio signal tracer I will do more testing. Thank you for your help. I really appreciated..

That is exactly what I was doing. I have found that there are no marks on the board of + from C132 and C148. I am going to flip them and see if I get something.

When I transmit with the radio I can hear myself on an other radio, I even ask for radio check and getting responds. (on channel 19–27.185) Microphone pin 2 (shield) test on all IF caps making the sound of a short. Microphone pin 4 (common ground) test it to all caps making the sound of a...

Once I read your respond, my concern was the mic wiring. I have a Road King 56 microphone. Pin wire 1- White 2- Shield 3- Black 4- Red 5- blue From the microphone board, pin 1 goes to Dynamike – pin 2 to the board to one of the pins from C106. Pin 3 green wire to rear speaker shield. Pin...

Learning electronics!

Thank you for your help Andy. I verify the IC4 these are the voltages. Pins 1) 9.36v 2) 13.02v 3) 13.02v 4) 0.0v 5) 13.02v 6) 9.57v 7) No pin on board 8) 0.6v The TR35 TX USB-LSB-AM had the same results 0.0v 0.07v 0.81v RX also had the same results 9.0v 12.87v 9.26v...

Update. I have found this voltage on the PA. and 0 volts on AM... I cannot figure out where power is coming from. I believe this is my issue the radio doesn’t go back to RX. PTT light is green Does anyone have any idea?

I appreciate your help... I find few capacitor that I did installed wrong... I have replace them and seems with the same white... I did check TR-15 it is in good working condition, I have purchased a Atlas DCA55 just for that task. I know as something different under R43 resistor without...

The light it is green while on RX... no dim light or darkness. it is odd indeed.

Update. I received the caps and replaced them, voltage still a little high, but stable. All the channels that were not working, now they do. I can see modulation on the Oscilloscope BUT I can't hear anything ONLY white noise. (Soft white noise). I unplug the antena to the dummy load and is the...

Update from last night. I was able to recover all the channels from 1-40 they are all correct under the frequency chart. However, it does not change the PTT from Channel 13 to channel 2 no audio.... I am little frustrated I really don't know if is word spending so much time in a radio I had...

Good Evening. The radio is back on and I HAVE AUDIO, I am still waiting for the Cap's to be replace. Once I replace the TR-38 I have audio modulation. I have being checking all frequencies and I notice that Channel (1) is on 26.965 MHz then I switch to Channel (40) the frequency is on 27.325...

Thank you for all of your replies, I have trace the voltage and mic signals. However, 99% of the Voltage are high in average of 1v 1.8v, I have order a kit of dielectric capacitor to replace them all. I found a short on a TR-37 XMT and a high voltage on a TR-38 XMT almost 3 time more of what the...