Bias (quiescent point) of Pleiades Siemens open base transistor LNA (low noise amplifier) has changed by change in ambient temperature

As it is spring time and more photons come each day from the sun to the earth, the temperature at Pleiades lab is 24oC, collector current increased to more than 300 micramperes and more volatge drop (by ohm'sl aw) to the 33K load resistor caused a 0.5V collector voltage. The front end amplifier still worked but with distortion, (see also yesterday posts) and there were very severe sibilant problems while singing to Shure VP24 mic. So dentist Dimitris is not to blame. Load collector resistor has been changed to near 20kohms and amp is back to good low noise, interesting sound work again. Vc is again 1.6 volts.