Search results

you won't find any voltage on that switch. it switches the ground side. your readings look fine if i understand them correctly. please try the test on the AC/DC switch on the back of the radio from my previous post. LC

you can test the switch by jumpering past it. be sure to unplug the unit and then switch the power switch on and off to discharge the filter caps, then with the unit still unplugged use your meter to find two contacts on that switch that are disconnected with the switch off and connected with...

" Pin 2 based on the tech sheet would be toward the front correct? It would seem I am not getting 13.5v at the trace." this was the statement that led me to believe you might have unsoldered the wrong pin. so, if you're only getting 4.5 volts at the trace that goes to pin 2 of the voltage reg...

the voltages you are measuring at the power supply are correct. that big cap is before the voltage regulator transistor that sets the voltage at the 13.5 volts you are seeing at the fuse. the power supply is good. pin 2 of the MB3756 voltage regulator is the second pin from the rear of the...

if you are measuring 13.5 volts at the fuse then the power supply board is fine. LC

your voltage regulator is most likely shot. just to make somewhat sure you don't have a new one fail immediately, unsolder pin 2 of the voltage regulator and move it off of the trace gently. then turn the radio on, and measure the TRACE that goes to pin 2, not the pin you just unsoldered...

if you want to see how much voltage is coming out of the power supply make sure the switch on the back is in the AC position and measure the DC voltage at the fuse itself. remember that you cant use the metal chassis for a DC ground for any of your measurements because it's isolated from the...

please measure all 8 DC voltages starting at pin 1 (rear) and list the voltages you get on each pin. they should not fluctuate. LC

the problem on my mic tester ended up being that echo/mic switch in the upper right hand corner. started playing with it and could get audio when held in a certain position but it disappeared when i let go. switch replaced and she's working good as new. might be something to check. LC

the next step should be to check the voltages on the MB3756 voltage regulator and post them here. its the smaller vertically mounted IC on the right side bolted to the wall. the one toward the front of the radio. it has 8 pins. pin 1 is toward the back of the radio. measure those DC voltages and...

ok so just wanted to comment on the new pics in the ad, it looks like someone must've had a speaker installed instead of the clock. i say had installed because this looks to be very professionally done, but the quality of the pictures isn't great so there may be sins hiding in the darkness. i...

Interesting. Well on the far off chance that the seller is a forum member and heard us, the seller should definitely take the top off and take a few pictures of the insides. there is more than just one custom change made to this radio and i wonder if there might be internal mods as well. LC

ok guitar199 what did you do to my mic tester!? just kidding. So, i went to test a known good 4 pin cobra coffin style mic yesterday (just to hear the audio from it) and experienced exactly what you did. scratchyness when turning the pot but no audio out. just for kicks i plugged that same...

https://www.ebay.com/itm/134565926240?mkcid=1&mkrid=711-53200-19255-0&siteid=0&customid=link&campid=5336136228&toolid=20001&mkevt=1 the guy says it seems stock but i don't think so. no clock? stars on the lights below the channel display? looks a bit custom to me. LC

pm sent

well i know im kind reaching here but just because you don't hear scratchyness from the pot doesnt mean its actually working. it could be quiet because its not passing anything through it. LC

i think they must have just used a very cheaply made pot in these things because i had the same scratchy audio from mine until i pulled the board (pain in the butt!) and cleaned the pot. its worked well ever since, but i am starting to get some scratchyness again when i turn the knob so i think...

ND999, the term you want to search for in order to understand more about how your antenna radiates is "take off angle". different antenna designs have different take off angles depending on design and environmental factors can affect this as well. I'll give you some "rules" about operating an...

who the heck decided to put the mic gain where the damn clarifier should be! here are some specs from rigpix: https://www.rigpix.com/cbfreeband/anytone_aresii.htm 1uV for 10db sinad on AM? LC

thank you all for the replies. i just want to state this here so we don't end up confusing anything. the mount i am referring to that is being sold for about 40 dollars on amazon has a 9" triangular footprint and uses 3.5 inch magnets. the tram 269 and the MFJ336T both use 5 inch magnets. my...