The best gift I have ever received Tektronix 2465

[Gyuri]

I think it is quite good!
Congrats!
Kind regards,
Gyuri

 

[dazzz]

In order to save people the headache and the location of calibrations
Photos from the process.
I also replaced the in the A5 borad
The 47UF capacitor to the bios ref voltage C2010


The original C2010 the ESR was Relatively high above 1.2 ohm
After the change
The reference voltage is very stable.
Anticlockwise
and clockwise

the ref v is 1.24v =2.48v

 

[Gyuri]

Everything is O.K., but you have referenced 2465A service manual and part numbers!

 

[Gyuri]

I have told you I can send 2465 manual for you.

 

[dazzz]

 

[dazzz]

 

[dazzz]

 

[dazzz]

 

[dazzz]

Now to the question
To all those interested in why I dismantled the printed circuit A1
I had a problem with the vertical scan I thought it was the attenuation

I ended up in the end
LR101 ( RF coil) burnt at first had a problem scanning, and Channel 2 stopped working.

This component resistor in parallel with coil 0.5UH

MARK 0325
108-0325-00

Can I create it
Something knows what the resistors value of LR101
After that I can wrap a coil on it until about 0.5UH ?

 

[thimios]

What is the solution in the dish?

 

[dazzz]

Clean water
I always clean PCBs like that
At first with alcohol
After that with water and delicate soap Brush with a brush .
And then with distilled water.
Bake in the oven for about 40 degrees.
And finally a cleaner with alcohol

 

[thimios]

I see bubbles?
This "Do not wash in water"?

 

[dazzz]

I see bubbles?
This "Do not wash in water"?

I know but I took the risk
At first I thought the problem with the unstable scan was that
attenuation
And at the end of the problem was not at
attenuation.

At least after that they were clean.
There was dirt in them that the gray was brown.

I have a much harder problem right now.
I need to create the coil resistors.
0325
0.5UH
I need to get a RF coil next week.
744762247A Wurth Electronics | Mouser Israel

Inductance: 470 nH
Tolerance: 5 % Maximum
DC Current: 420 mA
Maximum DC Resistance: 1.17 Ohms
Minimum Operating Temperature: - 40 C
Maximum Operating Temperature: + 125
C Product: RF Inductors Shielding: Unshielded Termination Style: SMD/SMT Package/Case: 1008 (2520 metric)
Length: 2.5 mm Width: 2 mm Height: 1.6 mm
Packaging: Reel Brand: Wurth Electronics
Case Code - in: 1008
Case Code - mm: 2520
Q Minimum: 45
Self Resonant Frequency: 480 MHz
Factory Pack Quantity: 2000
Test Frequency: 100 MHz

But I do not think it will work.
Because what I understood is an LR filter
If I knew the value of resistor
I could wrap a coil with resistor up to about 0.5UH

At least I try to make as many shots of all the printed circuits as possible
of the 2465

if someone has a problem in the future
Less will guess what to do
You do not know how much I looked for pictures of
attenuatior pcb

 

[Kay Pirinha]

Referring to your 3rd pic in #66, what's that U-shaped thing in a small heat sink with three solder points, which is connected to this white wire emerging from the lower right corner?


Best regards!

 

[dazzz]

UD800 hibrid ic
UD800 hybrid ic heat sink

 

[dazzz]

more photo fo the A1 pcb mod

 

[dazzz]

I finished the A1 board
I repositioned the LR107
Instead of burnt LR101
So LR101 is directly related to the LR201
To Pin 1 on
U100
U200

The LR107 I switched to TE's 470NH coil - SC30R47KT
I checked the resistance of LR101 / 201
108-0325
The resistance is about 0.4 ohm

On the way I replaced most of the resistors in the printed circuit
To 0.1 percent accuracy.
All electrolyte capacitors were replaced with electrolytic polymer capacitors.
47UF
10UF
220UF
100UF
Some of the 22NF ceramic capacitors
and the 100pF ceramic capacitors i replace to 1000pF 5000v NP0

Have been replaced to capacitors NP0 22nf 1000v
In addition to some of the ceramic capacitors
100 NF
100PF
470PF
I switched to film caps
of
wima
vishay 1837

Only remains put together
And hope that everything is fine

 

[dazzz]

my 3 tek

2445
2465

full reconstruction

About 600 photos you are welcome to see on my facebook
I have not been here for a long time
I am usually found in groups of tektronx
And measuring equipment
Page Not Found | Facebook

 

[HpW]

May replace the Y caps, while had a smoke on them (often culprit also seen on web). While today's power is 230V and a cap with 300V is required.

Hp

 

[1audio]

I would suggest 600V Y caps to ensure no early failures. if the cap is across the power line it is usually very conservatively rated BUT its pretty amazing what bad stuff can appear across the line. And while it may only be 100 uS long and less than once a year it could still blow things up.