Few commerical rigs use a heater to stablize the frequency. Some see it in applications such as broadcasting where very tight, much tighter than commerical, frequency is required.
I have seen this in lower priced/quality radios even some of the small older Motorola radios. It does make since as an approach for temp is often the problem with keeping a crystal on frequency. However, other methods are being used. 73, ron, n9ee/r >From: MCH <[EMAIL PROTECTED]> >Date: 2007/07/11 Wed PM 10:19:01 CDT >To: [email protected] >Subject: Re: [Repeater-Builder] Re: crystal/channel element compensation.. > >Threaded... > >Eric Lemmon wrote: >> >> I thought this horse was beat to death several times before, but he (she?) >> seems to cling to life! > >Maybe that's because many people still don't understand it. > >> Although "temperature stabilization" has a desirable ring to it, it is not >> the answer. Having a transmitter building that is maintained at a constant >> 60 degrees (for example) is irrelevant; > >While true, that is not what temperature stabilization is - at least not >the way many people do it. > >Stabilization is using a heater/oven so the crystal is always at that >temperature which is even hotter than the internal temperature of the >repeater. With that, you can achieve rock solid stability (no pun >intended). > >Joe M. > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
