If anyone with a plain 2465 or the A version is in need of the original Siemens fan motor, over at the Tekscopes-IO group someone found a seller on ebay that seems to have a big inventory of what seems to be brand new exact replacement motors. As far as I know the B series scopes never used this motor but rather a more common muffin fan type. But I might be wrong on that, and even some early B SN also use this fan. Since this motor is not easy to source, let alone in new condition, and a pain to repair, I thought I pass along this information. Even if yours is still working fine, perhaps a good idea to keep a spare on hand just in case for future needs.
Edit: this fan will also fit the plain 2445 scopes, and as pointed out by the seller, it will also fit some 46x and 47x series as well. Do your own homework, and probably a good idea to check the Tekscopes thread to be sure as I have no experience with those older scopes.
I am in no way connected to the sale.
https://www.ebay.com/itm/274013390896
Here is the original thread at Tekscopes group:
https://groups.io/g/TekScopes/topic/71491839
The price is going up. I bought one for a 2445A a few days ago at $9.99. Yesterday they were $14.99. Now $19.99.
The buying history says someone bought 20 of them, maybe to cash in when they're unobtanium again.
The price is going up. I bought one for a 2445A a few days ago at $9.99. Yesterday they were $14.99. Now $19.99.
The buying history says someone bought 20 of them, maybe to cash in when they're unobtanium again.
Yes indeed saw that too. The person that bough the 20 units might be someone servicing these scopes.
So get your spare motor while there is still a chance.
Just do another 2465B recap, serial number 01xxxx. Fuse blow up after 10 minutes after re-cap, no magic smoke. Turn out that the input bridge rectifier shorted
.
This unit have only 3xxx hrs run time and very clean inside. Only issue (if any) is the beam not prefect circular when I operate in X-Y mode.
Finally completed the 2465B I started last year, all the radial electrolytic capacitors in the PSU were replaced along with the RIFA stink bombs.
It was then tested before replacing the lithium battery on the A5 board, I soldered on a temporary battery to keep the cal data, I had to write the date of manufacture on the top of the new battery as they decided it was better on the bottom
, all was good after reassembly.
Just got a 2465, 2445 & 2445A left to repair, the 2465 & 2465B both have the TV option (05) fitted, no options fitted to the 2445/A.
David
They sold you a 2018 battery in 2020, or did you buy it some time ago?
Even tough we know now these batteries usually will last way past their 10-year life expectancy, academically speaking you basically have only about 80% life left in that one. Still ok but I would have hoped to receive a fresh one that was manufactured not more than 1 year ago or ideally less.
It was bought from Farnell in October last year, the only trustworthy supplier I could find that would sell this type of battery in the UK.
David
Should be ok as long as you did not buy it from a chinese seller on ebay!
Enjoy your scope.
I am not able to locate similar battery in Hong Kong and sending one from US through a qualified DG shipment forwarder is extremely expensive therefore I just solder a AA size 3.6V lithium battery
Can you not find the EVE LTC-7PN battery (made in China) in Hong Kong? I'm guessing the AA or half AA size lithium batteries probably cost less anyway.
David
Unable to find it in Hong Kong except those Israel made AA lithium battery
Funny you should mention that, I used one of those Israel made half AA batteries as a temporary supply during replacement.
David
Unable to find it in Hong Kong except those Israel made AA lithium battery
Found RS did sell cheaper than I get from local retail shop who sell various battery. RS said it will take them around 44 days to ship on ship from UK
HI, can you help me to fix my new oscilloscope
flickering
https://youtu.be/s0we1dCMUXwI got a gift 2465B from my dear friend in Germany who died from cancer a few months ago...
I have a problem with an oscilloscope and for legacy and memory on him I won't repair.. can you help
Thank You in Advance
Best Regards
If you are complaining that all LEDs are blinking "faintly altogether" whenever button is pressed, yes, that is normal for 2565B, no worry.
Hi guys!
I bought a 2465A with a bad channel 1 input module. The problem was a burned resistor in the 50ohm input path.
I soldered two thru hole resistors and the unit got back to normal operation! I got very impressed because with a fast pulse generator I'm not seeing any difference between this channel and the original channel 2. Pretty interesting !
Not very familiar with the input board, but just wondering what was the value of the original resistor that burned up? Two 68-ohm in parallel as you seem to have used will give you about 34 ohms.
Yep, It was very close to 34 ohms.. It makes a input attenuator with other Rs.
I was afraid to open the input module but it was my only option!
In this picture you can see the burned resistor complete split in half
Hi guys!
I bought a 2465A with a bad channel 1 input module. The problem was a burned resistor in the 50ohm input path.
I soldered two thru hole resistors and the unit got back to normal operation! I got very impressed because with a fast pulse generator I'm not seeing any difference between this channel and the original channel 2. Pretty interesting !
I'm surprised that the extra inductance of the leaded resistors didn't effect the BW or pulse response. Might want to consider a large chip resistor (lower inductance) instead of the leaded resistors.
I had a bad channel 1 (very erratic) and 2 had some issues also on a ebay purchased 2465. This was traced to the input hybrid modules and the relay contacts. I carefully cleaned the relay contacts and hybrid contact areas with a lightly abrasive pencil eraser, then cleaned with alcohol. This fixed the problem, I suspect that film had deposited on the contacts, maybe from cigarette smoke, which interfered with the contacts. While you have these hybrids open you might want to consider cleaning the relay contacts and contact area.
Anyway, nice work
Best,
Since it is not mentioned, the question would of course be what was the highest frequency (or fastest pulse width) used as comparison between ch1 and ch2 performance. I bet it was not anywhere near to about 100MHz where you would expect the leads of the resistors to start playing a part by adding inductance.