I must be missing something, there are several MFG of encoders/decoders still around. You are correct on the stability issue. You will find it much less frustrating to just buy off the shelf or get the one for your radio than trying to build one that is stable. Oh there is the cost of the new ones so that has to be figured in.
Stan From: [email protected] [mailto:[email protected]] On Behalf Of James Sent: Thursday, May 06, 2010 9:36 AM To: [email protected] Subject: [Repeater-Builder] CTCSS Encoder/Decoder Hi Guys, We have been experimenting with building CTCSS Units using the 567 Tone Chip and good components, i.e. Caps, multi turn pots etc. The stability is not good in my opinion. We will set it to 107.2 and the next time you check it is off enough to where it won't decode until it is re-tuned slightly. I am wondering what your experiences may have been with this CTCSS Chip. Many articles say they work well with the addition of a stable voltage regulator, so we added a five volt regulator, no difference in stability. Any comments and experiences with this and other chips would be appreciated. The availability of CTCSS Chips seems limited.
