Hello forum members,
Here I am with HP 105 unit. I picked up as I love to collect such engineering marvels. it was last calibrated in 1998 by hp, the calibration seal was still intact. I powered up, as people reported, the meter goes above on OVEN, 18.7V and 5MHz switch position, the meter shows ~30 on both 1MHz and 100KHz.
Only 5 MHz output is working. the frequency is 5MHz (I do not have precision device to measure it to full accuracy of the 105 device) but 1MHz and 100KHz output is not there.
I opened up the unit, it has ovenized oscillator 10811A (which is newer than the pictures above posted, i think). I am wondering what would be first step to look into to find out the issue on 1MHz and 100KHz output. Any suggestion at this point is helpful.
Regards,
Xtentec