I am messing around on a Philippines Uniden Grant XL. Circuit board PC412AG. I am trying to find a new replacement diode 75. It is a tiny thing about the size of the head of a pen. Its glass and has a blue ring around the top. At some point, that diode was cut and glob soddered back together. Id like to remove it and put a new one in. But I cant find one any where. Would a diode 1N4004 or IN4148 work instead? I have plenty of those.
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Philippines Uniden Grant xl diode 75
- Thread starter 460Linc
- Start date
Do you have a Parts List for the radio to know what nomenclature the D75 diode is? Probably 1Nsomething… You need to know that to check the diode specifications in order to select an appropriate replacement diode.
I don't have a parts list for the Grant. I have been looking on line for a parts list, and circuit board schematic for the Philippines Grant xl that I have.
I cant find them. The schematic and parts lists are available all over for the Cobra 148 GTL of that generation. They are supposed to be similar.
Diode 75 in the 148 schematic and parts list, is a 1N4148 Toyo Kuni. But that diode is nothing similar visually to the diode I am trying to replace.
I cant find them. The schematic and parts lists are available all over for the Cobra 148 GTL of that generation. They are supposed to be similar.
Diode 75 in the 148 schematic and parts list, is a 1N4148 Toyo Kuni. But that diode is nothing similar visually to the diode I am trying to replace.
Two thoughts come to mind since I was not able to find a Service Manual or schematic for that radio…
1. Contact Uniden’s Service Department and politely ask if they would kindly give you the nomenclature for D75 on the Uniden Grant XL Printed Circuit Board (PCB) number PC412AG.
2. At the risk of blowing something up, you could select a diode that has robust specifications and see if it works. The 1N4004 is a 400 V(RMS) 1 Amp silicon rectifier diode which has stronger specs than the 1N4148 diode. Should you try this, make absolutely sure that you get the polarity correct. Just remember, since you don’t know what D75 actually is right now, something could go wrong and render the radio inoperative.
1. Contact Uniden’s Service Department and politely ask if they would kindly give you the nomenclature for D75 on the Uniden Grant XL Printed Circuit Board (PCB) number PC412AG.
2. At the risk of blowing something up, you could select a diode that has robust specifications and see if it works. The 1N4004 is a 400 V(RMS) 1 Amp silicon rectifier diode which has stronger specs than the 1N4148 diode. Should you try this, make absolutely sure that you get the polarity correct. Just remember, since you don’t know what D75 actually is right now, something could go wrong and render the radio inoperative.
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