What is the radio/room temp at the time of power on vs the temp after x-time of operation?
skipp > "Stewart Rabinowitz" <[EMAIL PROTECTED]> wrote: > > Hi, Everyone: > > I recently got a Kenwood 30w 900 MHz TK-931HD radio, which works fine > and programs, but starts out at least 1.1K low when transmitting after > a cold power on, and stays there for quite a while. Once I transmit > solidly for 5 or more minutes and the heat sink warms up, the > oscillator moves up in frequency (as measured on a service monitor), > and in about 7 or 8 minutes is within 100Hz of set frequency. So long > as the radio remains powered on in receive, xmit frequency variation > will be within 300-400 Hz below set frequency and quickly rise to > within 100 HZ of set frequency on subsequent transmit. This is the > only 931HD which I have. > > I have several Kenwood TK-931s (15w radios). They start out about > 400-500 Hz low from a cold power up, but reach correct frequency > within about 2 minutes and stay there. > > The TK-931HD generates and needs to dissipate a lot of heat. Is this > frequency variation on xmit from a cold start normal, or do I have a > problem radio? > > Has anyone had this problem before, or problems, generally with radios > exhibiting this much drift prior to stabilization in a small footprint > commercial radio before? > > Thanks for your comments. > > 73 > > KE5UT > Stewart > Celina, Texas >
