Electronics > Repair

repair Agilent E4402B Tracking Generator 3GHz

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m2012:
I have a tracking generator in my E4402B that was flooded with water.
The BITG is a new type 5086-7993. I don't have any output level at all.
Inside the BITG is pure horror for anyone who wants to carry out an effective repair.
I cannot repair the output board in the BITG. This is because even if I had a machine for
bonding gold wires, it would be very difficult to buy components without a housing.
That's why I decided to recreate the BITG.
There was another post that was about a BITG for an E4407 that was built on normal PCB material.
I think there are probably other people with
the same problem.

m2012:

So, here are some photos of my defective output board.
You can see that some open wafers were installed and wired. Even the capacitors were not soldered.

m2012:
Ok, then I'll get started. I have a BITG circuit diagram here
which was originally created by dj9ss.
I have solved some unclear points and added some component values ​​from parts of my BITG. The schtplan initially only contains the RF part. I start with the control when the RF works.
I still need some help calculating the missing component values. For example, there is a filter L7 L8 L9 on page 4 and the frequency multiplier also on page 4.
Then there are the FL17 on page 4 and both filters on page 5 of the FL1 as structure on the pcb. Another point that comes to mind is the 1GG5-4202.
it is a diode-based reverse power limiter. There are probably other manufacturers that make a similar product.

m2012:
Today I have a few measurements in my luggage. These are the parts of my BITG that still work well. All measurements were carried out with a 20dB adapter.

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