Electronics > Repair
Repair : HP 3245A precision DC/AC source
crispy_tofu:
Twitch.tv maybe? Looking forward to it! :-+
TiN:
Twitch needed to install 3rd party garbageware (which not even working right on my Win2008).
Ustream it is.
I'll do proper video with camera as well, so don't expect much from cheapie webcam. ^-^
TiN:
I'll post details later (6am here, not slept yet!), but in two words : It was easiest repair in the world, did not even need to heat up soldering iron. :clap:
Here are some internal goodies:
Cleaning front panel:
:)
Vishay hermetic foils on HV board (4pcs 40K000 and one 4K4):
lukier:
--- Quote from: TiN on November 03, 2015, 10:17:19 pm ---I'll post details later (6am here, not slept yet!), but in two words : It was easiest repair in the world, did not even need to heat up soldering iron. :clap:
--- End quote ---
Great job! :-+
Get some sleep and let us know what was the issue. I remember the eBay listing (even asked the seller for the shipping cost but in the end it was too much) and it showed some errors.
Thanks for sharing the CLIP - PWM DAC indeed! (and 12 bit high speed DAC in low resolution mode). Interesting to see so many switching power supplies in a precision instrument (even for the inguard section).
Nice to see mostly off the shelf parts, except few hybrid resistor networks in the analog section and gate arrays (PWM DAC controller etc).
I see you added a bit of foam around LM399 to keep it nicely warm and cozy :D
Strangely enough, in the CLIP LM399 zener current is sourced from 5V. Heater uses GND and +18V. I remember other Agilent gear using +-15V for the heater and there was some discussion that this is a more stable arrangement :-//
lowimpedance:
Nice score , whats the bet it was a dirty or loose connector/socket. :)
A welcome change from the prior HP experience Im sure.
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