Hey All,
Since I am stuck at home with a leg cast and the parts for my other builds are not here yet, I was starting another project.
I do have some already really old Sennheiser Receivers and Transmitters. This stuff is still super nice to use and I don't want to throw it away. But I do have some units that need to be reprogrammed. Sennheiser is offering this at a ridiculous high price.
The transmitters use PROMS where the divider information for the PLL is stored. You just pop in a new PROM, do a little adjustment on the boards and you are ready to go. I do even have a software to calculate the files used for programming. The only problem is, that it uses N82S129 PROMS. Pretty old stuff that is hard to find and even harder to write to.
So I thought maybe someone here has experience with these PROMS and may be able to help.
Thanks in advance,
Johannes
Since I am stuck at home with a leg cast and the parts for my other builds are not here yet, I was starting another project.
I do have some already really old Sennheiser Receivers and Transmitters. This stuff is still super nice to use and I don't want to throw it away. But I do have some units that need to be reprogrammed. Sennheiser is offering this at a ridiculous high price.
The transmitters use PROMS where the divider information for the PLL is stored. You just pop in a new PROM, do a little adjustment on the boards and you are ready to go. I do even have a software to calculate the files used for programming. The only problem is, that it uses N82S129 PROMS. Pretty old stuff that is hard to find and even harder to write to.
So I thought maybe someone here has experience with these PROMS and may be able to help.
Thanks in advance,
Johannes