Was gonna get a ds1000z but...... - Page 1
Forum section: electronics / testgear

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 05, 2013, 10:27:07 pm
content: Ok as the title says was gonna get a rigol 1000z but since it would only take 4 or 5 weeks of saving to get onethought i would have a look on ebay for a newer analog scope to go with my 474a with what i have saved now.This is what i got I payed $350 for the scope has option 9 and 10 and i got the TM500 plugins and power module for right at $300.The only thing I would like different on the TM500 is to have an FG 504 instead of a 502.One power supply has low output on the positive side and the function gen has a power prob.So I thought it would be a good project to trouble shoot (just have to build an extender cable)and this wasthe setup I used to drool over when I was a teenager and would go with my grandfather to get his radios repaired.Should I have just bought the 1000z and forgot about yesteryear.

author: c4757p
author_rank: Super Contributor
timestamp: August 05, 2013, 10:41:49 pm
content: Quote from: ahnuts72 on August 05, 2013, 10:27:07 pmNah..... that's a pretty awesome scope. I'd consider it anupgradefrom the Rigol. Yeah, storage would be nice to have, so keep your eye out for a cheap storage scope. I quite rarely find myself booting up the DSO these days, it's either an analog scope or a logic analyzer...I think you might have paid a bit much for them, but notoffensivelymuch, and they are nice.

author: Electro Fan
author_rank: Super Contributor
timestamp: August 05, 2013, 10:58:11 pm
content: $300 for a working 2467 - you did well

author: c4757p
author_rank: Super Contributor
timestamp: August 06, 2013, 01:29:51 am
content: Oh, it's a 2467, not 2465 as I thought. Perfectly reasonable price then.

author: BravoV
author_rank: Super Contributor
timestamp: August 06, 2013, 02:27:52 am
content: Quote from: Electro Fan on August 05, 2013, 10:58:11 pm+1 and you got a great bargain there, that beast is the fastest portable analog scope on earth that ever made, congratulation !Damn, I envy you, that Microchannel CRT is considered an exotic technology imo.Grab this file here and suggesting to refresh the caps ->Tektronix 246X Oscilloscope Restoration Repair (PDF), hopefully this will help in the intermittent power problem.

author: c4757p
author_rank: Super Contributor
timestamp: August 06, 2013, 02:31:47 am
content: Want to trade for my 2445A? I'll even pay shipping!Look at that beast of a CRT.I'd like to see any other analog scope show a 950ps pulse that brightly!

author: TerminalJack505
author_rank: Super Contributor
timestamp: August 06, 2013, 02:46:47 am
content: Quote from: BravoV on August 06, 2013, 02:27:52 am"Error 404 - Not Found" on that link, BravoV.I've got a 2467. I paid $500 for it 4 or 5 years ago and it doesn't have any of the options. $300 sounds like a pretty good deal to me.

author: BravoV
author_rank: Super Contributor
timestamp: August 06, 2013, 02:53:48 am
content: Quote from: c4757p on August 06, 2013, 02:31:47 amYeah, this MCP crt equipped beast made my 400Mhz 2465B looks like a toy when showing a really high speed signal.Imo, one of the best and affordable tool for enthusiast grade, for hunting down a repeatable spurious high freq oscillation.Alan (w2aew) made a fine example where this right tool comes really handy.Cheap digital scope simply can not beat the clarity on showing these kind of spurious oscillation signal.Quote from: TerminalJack505 on August 06, 2013, 02:46:47 amOps, sorry, the link ->http://www.condoraudio.com/wp-content/uploads/Projects/Tektronix-2465B-Oscilloscope-Restoration-Repair.pdfalso corrected the link at my post.

author: c4757p
author_rank: Super Contributor
timestamp: August 06, 2013, 02:59:55 am
content: I find that I often have no intuition for what I'm looking at with a digital scope. If I know what to expect I can use it fine. If I'm tracking down a "what the hell is this" signal I'm just poking around in the electrical ether with a blunt stick. (I'm sure one of the recent ones that are more analog-like would work fine, but I can't afford one!) Ihavea usable 400 MHz scope (TDS-380), but it only gets used if I need 400 MHz or I need storage, because itsucks...

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 06, 2013, 04:06:58 am
content: Quote from: BravoV on August 06, 2013, 02:27:52 amThe intermittent power problem is just with the FG 502 plugin.According to the seller there are no errors when the scope is powered up one of those dont have the knowledge to test further dealsbut you never know,thought i would take the chance.But reading everything ive read a recap and a fresh battery for the calibration data and a heat sink on u800 hybrid is in order.Maybe backup the cal data if i can.

author: BravoV
author_rank: Super Contributor
timestamp: August 06, 2013, 04:16:45 am
content: Quote from: ahnuts72 on August 06, 2013, 04:06:58 amYep, imo backing the cal data is the highest priority in the to do list for that beast of yours.Assuming it uses the same part as 2465B at the A5 digital board, just fyi, Digikey carries quite fresh stock of the pesky battery backed up ram used in that scope. Bought mine few months ago with date code 2012, while my original DS1225Y that came with the scope with date code 1989and amazingly still working fine, although the cal data already backed up and copied to the fresh one.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 06, 2013, 04:23:24 am
content: I thought i read somewhere that earlier models had a external bat and later ones where built into the chip but I could be wrong.I can muddle through with caps and resistors and stuff of the discrete nature but i have no clue when it comes to pulling data from a chip.What would be the best way to save it if you dont mind explaining.

author: BravoV
author_rank: Super Contributor
timestamp: August 06, 2013, 04:25:51 am
content: Quote from: ahnuts72 on August 06, 2013, 04:23:24 amRather than repeating, posted the detail on copying the data here ->https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/msg266854/#msg266854, hope this helps.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 06, 2013, 04:29:26 am
content: Thanks for the link definitely gonna give it a read.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 09, 2013, 07:00:25 pm
content: Ok received the tm506 with plugins and the frequency counter plugin they all look brand new not hardlya scratch on them.One ps-503a power supply only shows 2.5 max on positive output but fine on negative output just asdescribed.But the only prob with the fg-502 is the power led doesn't work.The ps-501-1 shows within 13mV of the setting using the dm-501a and 15mV of my radioshack 22-812.The dc-504a shows 1.001 from the function generator and my radioshack meter shows 1.003.The ps-503a shows within 3 mV of my radioshack meter.

author: BravoV
author_rank: Super Contributor
timestamp: August 11, 2013, 06:26:11 am
content: Post pictures of the big main analog A1 board, and the digital A5 board once you received that beast please.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 11, 2013, 04:50:06 pm
content: Ok should be here TuesdaySent from my Milestone X using Tapatalk 2

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 13, 2013, 10:35:43 pm
content: Ok here it is!!!!!!First one is measuring a 50Mhz oscillator i had.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 13, 2013, 10:36:27 pm
content: MoreForgot to mention it came with a front cover and operators manual too.

author: echen1024
author_rank: Super Contributor
timestamp: August 13, 2013, 10:42:28 pm
content: That scope is absolutely beautiful.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 17, 2013, 12:35:07 am
content: Thanks I'm glad I took the chance on it.I was looking at a dso but I'm not messing with digital stuff.Still trying to wrap my head around analog circuits so it got me to thinkingwhen I add up all that this scope can do the only thing I would prob useon a digital scope is the singe shot capture.Was gonna get a better power supply and a function generator and maybeanother dmm and saw the tm500 and got 3 power supplies a 11Mhz function generatorand 2 4.5 digit .05% multimeters for what i was gonna spend on just a power supply and function generator.They aren't auto ranging but its i don't really have a problem pushing a couple buttons to change ranges.They may be old but they work.(And I love the look of old tek gear every since I was a kid.)

author: c4757p
author_rank: Super Contributor
timestamp: August 17, 2013, 12:54:03 am
content: Quote from: ahnuts72 on August 17, 2013, 12:35:07 amI find the combination of analog scope + logic analyzer to be easily good enough for almost everything. I do occasionally like to capture something like the startup behavior of a power supply, but I rarely boot up my DSO.Also.... I want your scope!

author: echen1024
author_rank: Super Contributor
timestamp: August 17, 2013, 04:31:28 am
content: Quote from: ahnuts72 on August 17, 2013, 12:35:07 amI got an old, broken Tek 2465 for my 9th birthday. My dad got it on ebay for $75 broken, and challenged me to fix it. Damn thing took me 3 months to get working. But, it sits alongside my Siglent DSO today, and its just so much nicer to use.

author: c4757p
author_rank: Super Contributor
timestamp: August 17, 2013, 04:34:30 am
content: Quote from: echen1024 on August 17, 2013, 04:31:28 amChallenged you to fix a 2465? Evil!

author: echen1024
author_rank: Super Contributor
timestamp: August 17, 2013, 04:44:17 am
content: Quote from: c4757p on August 17, 2013, 04:34:30 amIt was bad. I had to call in my Grandpa, and my dad's former professor.

author: edavid
author_rank: Super Contributor
timestamp: August 17, 2013, 04:54:59 am
content: Quote from: BravoV on August 06, 2013, 04:16:45 amNo. The 2467 is the same generation as the 2465A. Then there was a 2467B that was similar to the 2465B.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 17, 2013, 11:15:23 pm
content: I want to peel back the sticker on the ram module to see the date code butI'm afraid the face will come off and leave some paper and adhesive on the chip.I really don't want to go rubbing all over the chip.Another questionWhat would be the best way to remove the chip to backup the cal dataI have solder braid not the best but i do have some and one of those springloaded vacuum pumps.Would it be better to buy a de-soldering gun to remove it to lessen the chanceof damaging the chip and losing the cal data?

author: echen1024
author_rank: Super Contributor
timestamp: August 17, 2013, 11:49:36 pm
content: Quote from: ahnuts72 on August 17, 2013, 11:15:23 pmYou might as well take solder jumper wires on the board, and hook those into an EEPROM programmer, and read the data. Thus, when you take it out, even if you damage it, you'll have a memory dump of everything inside, and can flash it onto your new memory chip.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 18, 2013, 12:02:51 am
content: Thanks that thought crossed my mind but i haven't dealtwith programming or reading any type of ic before so wasn't sureif I could do it in board or not.

author: ahnuts72
author_rank: Regular Contributor
timestamp: August 24, 2013, 07:45:10 am
content: Houston we have a problem!!!!!!Was trying to probe a ramp generator I'm building and the scope just shut off and wont come back onI wasnt probing anything at the time was looking at the schematic and went to use it and no display.Pressed the power switch and nothing not even the fan is coming on.Checked the fuse outside and both fuses inside all fine.No smell or smoke nothing visually burnt,bulging or leaking.It just turned itself off and wont come back on.Tried probing the power connector to one of the options and no voltage at all.(well several mV but should be like +5,+15,-15)