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Re: HP 130A restoration


 



Those are considered "bumblebee's".? Generally, speaking, they were bad if they made a noise when you threw them in the trash.?

On Wed, May 8, 2024 at 11:55?AM n4buq via <n4buq=[email protected]> wrote:
If I'm not mistaken, brown,black,yellow,white(silver?),yellow -> 100,000pF, not sure of the tolerance (white, silver?), 400V.

Barry - N4BUQ


From: "Bepi" <pepicima@...>
To: "HP-Agilent-Keysight-equipment" <[email protected]>
Sent: Wednesday, May 8, 2024 10:27:44 AM
Subject: Re: [HP-Agilent-Keysight-equipment] HP 130A restoration
I found the main power supply issue, a blown capacitor in the HV section, one side to ground. Unplugging the tubes was not enough to exclude the HV section.
From the schematic?

I notice that the blown capacitor C112 has a sister one C111 , same value, according to the component list 0.1 uF


if I measure the good one i get a 3 times bigger value? (this Chinese res/cap/ind/diode/transistor 3$ is amazingly useful)


?and the resistor in between measures 45 ohm instead of 100. Can anybody read the capacitor color codes?
Reality is different from the schematic , the manual is for mod 25 to 724, mine is N 2482
I am tempted to go with the schematic and replace the original capacitors with polyester ones I already purchased, .1uF 650V, am I doing the right thing?

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