In a message dated 15/07/05 15:37:09 GMT Daylight Time, [EMAIL PROTECTED] writes:
I had one rig that wouldn't function much below about 11.0 volts due to that effect. Under transmit loads on the battery and with the voltage drop in the power cables, 11 vdc at the rig happens a lot sooner than you'd think for a QRO rig. Reply: ---------------------------------------- The basic K2 at least seems a lot more tolerant than most radios with an operating voltage range quoted in the specifications from 9 to 15VDC. An Icom IC-706 mkII I have will not work below 11.75VDC as the PLL section voltage regulator goes out of regulation below this point causing severe FM on the TX signal. With a 12V lead acid type battery it is unwise to expect too much life left available when the voltage measured directly at the battery is approaching 11V as the droop in voltage starts to accelerate at that point. Most comm systems that I worked on with lead acid battery plant are usually set to disconnect the batteries at 1.75V per cell or 10.75V with a 12V system to prevent permanent damage to the batteries. Even if they did not take this action the available battery charge would not last too long in any case. Bob, G3VVT _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
