The 27C64 is a low power version of the 2764 so it depends on the design of your controller as to exactly what will happen if you try to substitute the higher power version. They are pin for pin interchangeable. Generally the high power version requires more TTL drive while it provides more drive on the output. If you have access to a UV eraser, why don't you erase the existing 27C64 and reprogram it? Digikey has the 27C64 if you think you need to go that way. I erased the EPROMs in a Tait 800 and reprogrammed them with the new frequency info. Some of the older EPROMs will erase, and you will find that some won't erase at all. You just have to give it a try.
73 - Jim W5ZIT -----Original Message----- From: [EMAIL PROTECTED] To: [email protected] Sent: Fri, 24 Nov 2006 11:21 AM Subject: [Repeater-Builder]Repeater Controller (new) I am helping the club bring an repeater back up on air, and I am working on the controller. I am trying to change the callsign in it, I have found what info I need, but my question to the group is- The controller uses a 27c64 EPROM, and all I have is 2764 types? Can I use the ones I have, or do I need to get the right one? I am new to the EPROM world, so I don't know much about them. It goes to show one is never too old to learn a new part of the hobby... 73 Mike - N7ZEF ________________________________________________________________________ Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
