Recent content by loosecannon

just spitballing here, but you might try putting an ohmmeter from chassis ground to PC board ground, with and without your coax to the dummy load connected. in both cases, you should have no DC connection between them. LC

LOL i bet that 15 seconds took someone a long long time to create!

you're in Luck! i do happen to have one that doesn't work and ive had it so long i don't remember what did or didn't work. I believe one of the meter windows is cracked. it is complete i believe but is not screwed together. you are welcome to it, and just need to cover the shipping. Unless you...

i think your problem lies in the circuit containing Q30, Q31, and Q33. i know you said you already checked them but any experienced tech will tell you that it's always the thing you're already sure its not. It takes some doing to get the right info for a situation like this because its a...

There are some mods that can be done to that chassis but i can't remember what they are. I'll have to look at my SAMS manual for that radio as i think i made notes on what can be changed. somewhere out there in CB land is an 89GTL that i put an RFX-75 in. I called it a street sleeper as it...

if this radio has the same board as the original RCI-2950 then its right next to L6. LC

do you have a way of checking how deaf the radio is? Like, a signal generator with a calibrated output. put a 1K tone into the radio at 30% modulation and see how far down it can hear. you should be able to hear at least down to around -115dbm and im used to galaxy receivers still picking up...

10 volts does seem a bit low. here are the correct voltages for the audio chip: LC

yeah your picture is correct but everything you posted sounds like you lifted pin 10 off the board instead of pin 1. also, the chip should be installed with the label facing the chassis wall. any chance it got put in backwards? LC

Seems to me that the 10.75 volts on pin 1 of the audio chip is your issue. that comes directly off of the main V+ into the radio. something is pulling that voltage down as it should be almost 14 volts. First, you can try lifting pin 1 off of the PC board and checking that trace, to see if it...

the diode is a regular old 1N4148 or similar. Ive done this mod to a few new style 2995s and found that any resistor value wouldn't allow the negative peaks to reach near 100%. i ended up just using the diode alone. however, i do not clip any limiters when i do this mod. Trucks may have...

Eldorado, if you have a scope, can you tell us what the negative peaks look like with this mod? I believe that it will show them not even achieving 90%. LC

AI says these two might be candidates. I'll leave it to those more experienced than i to read the datasheets: https://www.digikey.com/en/products/detail/ixys/IXFQ60N50P3/2650882 DATASHEET: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/7125/DS100311BIXFHFTFQ60N50P3.pdf...

Thank you for posting that SAMS. i tried searching for it but the search function on this forum is not so great. so the diode you are looking for is D-506. the AMC is VR8. you'll want to peak the transmit before you do the mod so you will end up with the desired deadkey level without...

if you do have a schematic, please take a good pic of it and post it here. LC