mnem, those 2 parts are exactly what I need. You still have my snail mail address, right? Isn't great when a fellow TEA'er can help each other with their addiction? Hopefully I can return the favor one day.
To address your concerns....I have a 2465 DMS and I am VERY familiar with the squirrel cage fan and that colet assembly. I was able to get mine apart without breaking it with lubricant and careful prying. That was 2 years ago when I completely re-capped both supply boards. The fan motor in that scope is a little noisy upon initial power up but quickly quiets down after a few minutes. That Siemens fan motor is unobtanium and stupid complex to rebuild. So as long as it works I'm leaving it alone. The fan in this new 2465 is quiet...so far.
I've had this new 2465 on for several hours and I've also gone thru several power cycles. Absolutely NO issues except for the mentioned sweep cal being slightly off. I would think if there was an intermittent issue I'd see it by now. Later today I'm pulling the covers and give it a good visual check and measure the supply voltages at J119 on the main board. If they are OK I'm NOT pulling the power supply boards.
The A5 board: This is a 2465. The A5 is pin thru hole board with almost NO tants or other caps. Very much unlike the 2465A and 2465B which have the SMT A5 board. Also, the cal data is in an EAROM which doesn't require a backup battery. So no worries here but I understand that those EAROM chips supposedly have a finite read/write cycle and then start crapping out. The EAROM chip in the Buffer (Option) board in my 2465 DMS does take intermittent checksum errors so there seems to be some truth in that rumor.
I'll post some pix later today when I pull it apart.
Oh, brain fart.
I've been trying to coach neo on his 2465B; in fact, part of that post was cut/paste from those conversations.
Dumbass; that's what I get for trying to put up a long tech post at 00:Dark-thirty in the AM.
As I say with all my advice, please take in the spirit in which it is offered: Use what is helpful, disregard what is irrelevant, and if you find something offensive please just assume I was being daft, as I very RARELY intend to be mean.
These 24x5 repair notes are sufficiently useful that we would benefit from them being on some 24x5 repair thread, not merely buried in theses 10,000+ posts!
Thanks.
Here's links to a pdf parts list, a pdf dissertation on rebuilding the Tek 24xx DC-DC converter, a page that helped me with links to a lot of other useful info on repairing the 2465, and here is KO4BB's archive of service manuals and resources for the 2465B/2467B. Please don't forget to give back a little via the button; hosting those documents isn't free and you can skip Starbucks or McD's for a day.
I think that stuff has already been posted in the 2465 repair thread.
Yup, that's where I found those links... after doing a deep dive years ago. I just put the ones I felt yielded the most useful information together in one sentence in my repair notes to be able to cut/paste later; I really should have edited the one link to return
KO4BB's resources for the 2465, which he ALSO has oodles of, along with
all sorts of OTHER useful stuff as well for us boat anchor enthusiasts. But as I said earlier... 1AM brain fart.
mnem, those 2 parts are exactly what I need. You still have my snail mail address, right? Isn't great when a fellow TEA'er can help each other with their addiction? Hopefully I can return the favor one day.
Totally agree and I think it goes on a lot, sometimes in the background rather then publicly as well, I know that from personal experience
Good, just wanted to be sure. Yup, still have your address; I just haven't decided what all I'm putting in the box yet.
I'm glad to help; I know it's a small thing in the grandeur of Ifni's scope, but I'd rather make a small positive difference than a big negative one, or none at all.
As I tell my friends in the RCGroups forums;
Pay It Forward. It's what I'm doing, and a lot better than paying it back, IMO.
I mean really... the last thing I need is ANOTHER box of random junk to sort and archive right now. mnem
Don't git any on ya!