Tim, I've been reading the repeater builder and was wondering if you have the Bipolar Prom solved?
I have a Spectrum VHF repeater and encountered the same problem with the ID'er you have. If it is the same chip number as mine (I'll look at the number tomorrow... 21?? I think) they are capable of programming 4 different ID strings before the Prom is totally used up. They only use a single bit at each address and cycle downward through the chip's addresses to store the ID data. You then just set your ID'er to read the correct bit. I managed to program an additional channel on the chip from the previous owner (BY HAND) and got mine going. I finally found and purchased a couple Prom chips... (don't recall where - been 5 yrs) If you let me know the number of the chip you need or number of the ID'er board I would be glad to share any info I might have. I could even let you have one of my chips if it will work for you. I never bothered to program either of my spares after sweating through blowing the original chip, one bit at a time. It ID's fine using the second channel and you know what they say... If it ain't broke --- Don't fix it !. I also didn't know anyone who owned a programmer and wasn't aware of the Repeater Group back then. As helpful as they are on here, if you ask, someone on this group must have a Bipolar Prom Burner kicking around that would program a chip if you provide the chip and data. Use my call at juno.com if you want to contact me off list. Larry - N7FM ----- Original Message ----- From: Mike Morris To: Repeater-Builder@yahoogroups.com Sent: Saturday, August 25, 2007 6:58 PM Subject: Re: [Repeater-Builder] Re: Spectrum Repeater CW ID 'er Bipolar Prom At 01:55 PM 08/24/07, you wrote: >--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> >wrote: > > > > Spectrum Repeater CW ID'er Bipolar Prom > > > > > If the IDer has a PROM then little can and should be done > > > to go another way...a new PROM. > > > > Spectrum sells a replacement prom from about $55, which is kind > > of out of line for a price... but at least it's available. > > > > You can find/ask someone with a bipolar prom burner to make a new > > chip for you. But you have to find the chip and figure out how > > to map your call sign into the new part. > > > > One can also replace a Prom with an Eprom using a small adapter > > daughterboard, which is a path I've used many times. You need > > only have the eprom, programmer and set up the programming. > > > > Prom daughter/adapter boards run under $20 each... > > > > Another option would be to disable the factory ID'er and > > install an ID-O-Matic or similar ID unit. > > > > cheers, > > skipp > > >Thank you Skipp for the manual for the SCR-77. I can not contact >Spectrum. They will not respond to there e-mails and when you call >them you just getting a recording saying to leave a message, which I >have, still no contact yet. I have also thought about installing >another ID'er. What would be my best bet there. I have heard Com-Spec >(Communication Specialists) makes a small simple ID'er. > >73, >Tim Or bypass the entire controller and use a low end NHRC or ICS controller to do it all.
