charlie@oakhill.UUCP (Charlie Thompson) (04/26/87)
In the never-ending search to find the source of leakage in my HP608D signal generator I have discovered what appears to be the major source of radiation. There are three shafts passing through the cast aluminum box. One is unused (older version?), one is for tuning the output buffer, and one is for tuning the oscillator frequency. Well, you guessed it, the shaft pas- sing through the box that is used for oscillator tuning (actually the grounded shaft of a variable capacitor)is making most of the problem. In two places on the box is notice saying *do not oil bearings*....they look oily! My theory is that some oaf in the airforce tech pool oiled the blasted bearings for the shafts! Now if you think its a simple matter to get those bearings out and clean or replace them then drop me a line and tell me about your experiences! Otherwise if you ever go to buy an old HP608 make sure you check it out electrically first. The eternal leakage hunter, Charlie Thompson WB4HVD