Good Day to all. I am about to repair my personal JL Audio 1000/1 again, that I had repaired twice before over the 5 years I have had it. The first time it went out when I mistakenly wired it to 1 ohm combined with low voltage, and the second time I believe it was low voltage alone. I will start the repair thread by first asking for help to select the PS FETs and outputs.
PS FETS: The amp originally had IRF3707 in the power supply, and I used IRF3709Z both times previously. I am unable to find IRF3709Z available at this time so I am looking for advice regarding what I should use. Using alltransistor.com equivalent chart I personally think IRL3103 would be a good substitute as the specs are very close to the IRF3707 according to the attached chart. Digikey suggested the IRLB8721PBF as a substitute. The gate resistors were changed to 22ohm to work with the IRF3709Z.
OUTPUTS:. Don't know what was originally in this amp as the previous owner had tried to repair it with IRF540. I had used IRFB31N20D both previous repairs. What would be the best choice for outputs this repair?
PS FETS: The amp originally had IRF3707 in the power supply, and I used IRF3709Z both times previously. I am unable to find IRF3709Z available at this time so I am looking for advice regarding what I should use. Using alltransistor.com equivalent chart I personally think IRL3103 would be a good substitute as the specs are very close to the IRF3707 according to the attached chart. Digikey suggested the IRLB8721PBF as a substitute. The gate resistors were changed to 22ohm to work with the IRF3709Z.
OUTPUTS:. Don't know what was originally in this amp as the previous owner had tried to repair it with IRF540. I had used IRFB31N20D both previous repairs. What would be the best choice for outputs this repair?
Attachments
IRF3709ZPBF Infineon - MOSFETs - Distributors, Price Comparison, and Datasheets | Octopart component search
The latest version that I've seen used the FDP52N20 with 22 (22.1) ohm gate resistors.
The latest version that I've seen used the FDP52N20 with 22 (22.1) ohm gate resistors.