Author Topic: Old Fluke Multimeters  (Read 187878 times)

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Offline gizmoco

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Re: Old Fluke Multimeters
« Reply #75 on: November 10, 2013, 11:03:25 pm »
"Do you have 32 806x?"

No, a variety including a few bench meters. I usually run into 3 or 4 great deals a year at garage sales or hamfests. Most recently I bought a 77 and an 8062A for $15 each at a hamfest. Best deal was a 333 for $2 at a garage sale complete with soft case in like new condition. How can you pass on a deal like that even if you have too many meters?

"Can you post a picture of the two lcd displays side by side?"

I'd be happy to but it may be a while. My wife is having health issues so I'm spending a lot of time at the hospital.
 

Offline lowimpedance

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Re: Old Fluke Multimeters
« Reply #76 on: November 11, 2013, 12:18:18 am »
You can turn any 8062 into an 8060 if you know what to do (and I do). But unless you can find a case with the other two holes and figure out how to get the other two elastomeric switches, it won't be pretty.
drtaylor
 I was curious enough to have another peek inside my 8062a  to see what was 'left in' to simplify manufacture between the two versions.
Last time I had it apart I recall that the top cover had the moulding for two more buttons. The top casing does indeed have the positions for the buttons and the holes are just covered by the label, however the switch/LCD PCB only has the two switch pads etched. So there was two PCB versions, one for 8060a and another for the 8062a with only two buttons it seems.
 
The odd multimeter or 2 or 3 or 4...or........can't remember !.
 

Offline Excavatoree

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Re: Old Fluke Multimeters
« Reply #77 on: November 11, 2013, 09:08:24 pm »
Someone told me recently that they were still selling new 8060s as recently as 1998. Does anyone have confirmation of that? If true the production run of 8060s went from 1982 to 1998, over 16 years. I wonder if any other DMM had such a long reign.
Radio Shack catalog from 2001 shows the 8060A for sale at $499 MSRP.  8062A had a $419 MSRP.  See

http://www.radioshackcatalogs.com/html/2001-b/h244.html

Fluke 27 is still advertised in same 2001 catalog, but I haven't done any research on when the 27 was first made yet.

http://www.radioshackcatalogs.com/html/2001-b/h246.html

27 had a $349 MSRP.

Both models don't show up in the 2002 catalog, but still could have been sold as Radio Shack may have decided to concentrate on their own brand name multimeters?


Here's a section of a 1996 catalog showing the 8060 series, but the picture is of an 8062.  It's a color catalog, so I'll include it if anyone is interested.

I've got the two page section scanned that includes the original 80 series, and the Model 45 Bench DMM.  It ended up as a 15 MB .PDF, so I can't attach it.   I also have the two pages of the 70 series II meters.
 

Offline bance

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Re: Old Fluke Multimeters
« Reply #78 on: November 12, 2013, 07:09:31 pm »
From what I've read of this thread, it's mostly focused on hand-held meters, but given the thread title I don't think I'm too far off topic.

I've recently bought a 8800A bench meter, but it has suffered the ravages of time, and is missing a couple of switches. They are the piano type switches, and I'm missing two, the power switch (I believe it should be green in colour) and the resistance mode switch (Putty grey in colour.)

Anyhow the question I'd like to ask is if anyone knows of a source for these switches. I've located this http://qservice.tv/vpasp/shopexd.asp?id=10153 at "Q-services" which looks very similar to the specified part, but has a different part No.

 I think that if a source is not available, I could just order two of these and perhaps swap the auto-range switch for the resistance mode,of course, that's assuming they are compatible switches!

Thanks in advance,

Steve.
 

Offline SLJ

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Re: Old Fluke Multimeters
« Reply #79 on: November 12, 2013, 07:36:44 pm »
I might ave a couple of these for parts.  I'll check.  I might have sold them at a meet, don't remember but I'll check later today as they would be out in the other shop if I have them.   Put your general location in your profile so we know about where you are located.

Offline edavid

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Re: Old Fluke Multimeters
« Reply #80 on: November 12, 2013, 08:02:57 pm »
I might ave a couple of these for parts.  I'll check.  I might have sold them at a meet, don't remember but I'll check later today as they would be out in the other shop if I have them.   Put your general location in your profile so we know about where you are located.

He has a Thurlby DMM and he wrote "colour" -> I'll bet he's in the UK.
 

Offline Mr Simpleton

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Re: Old Fluke Multimeters
« Reply #81 on: November 12, 2013, 08:29:39 pm »
 

Offline SLJ

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Re: Old Fluke Multimeters
« Reply #82 on: November 12, 2013, 08:29:59 pm »
I might ave a couple of these for parts.  I'll check.  I might have sold them at a meet, don't remember but I'll check later today as they would be out in the other shop if I have them.   Put your general location in your profile so we know about where you are located.

He has a Thurlby DMM and he wrote "colour" -> I'll bet he's in the UK.

He types pretty good English for being in the UK...  :-DD

Offline bance

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Re: Old Fluke Multimeters
« Reply #83 on: November 12, 2013, 08:57:38 pm »
Yes, I am in the UK, London in fact. :scared:

I'm pleased that I amused you with the "correct " spelling of color! :-DD

@Mr Simpleton, I think maybe Banksy has been at that standard.

@SLJ if you have these Items, I would be most appreciative, advise me of the pecuniary arrangements you prefer.

Thanks, Steve

PS. I'm first generation Irish, hence the good English!!!

Hey look post number five, I'm eligible for the next freebee draw! Wahooo!
« Last Edit: November 12, 2013, 09:03:41 pm by bance »
 

Offline Napalm2002

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Re: Old Fluke Multimeters
« Reply #84 on: November 13, 2013, 01:30:38 am »
I have a few 80 series buttons for the handheld dmms I don't know if they would work...
 

Offline bance

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Re: Old Fluke Multimeters
« Reply #85 on: November 13, 2013, 10:06:20 am »
Thanks Napalm2002,

I have a 8022B the buttons on that are push/slider type, are all 80 series the same?

If so they won't fit the bill. You can see the type I need from the picture I posted above (it's the lower meter!)

Thanks once again, Steve.
 

Offline SLJ

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Re: Old Fluke Multimeters
« Reply #86 on: November 13, 2013, 12:59:15 pm »
I had three of them, all dead but complete mechanically.  Unfortunately I must have sold them for parts already as they aren't on the shelf where I would keep them.  Should have at least kept one for myself as those switches were not the best design and spares would have come in handy.

Offline bance

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Re: Old Fluke Multimeters
« Reply #87 on: November 13, 2013, 01:33:08 pm »
OK, thanks for taking the time to look SLJ.

I suppose I'll get those parts from "Q-Services", just hope they fit!

Steve.
 

Offline Dave Pye

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Re: Old Fluke Multimeters
« Reply #88 on: November 13, 2013, 04:38:11 pm »
 :-DMM :-+ :-+
Dare to learn
 

Offline turbo!

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Re: Old Fluke Multimeters
« Reply #89 on: November 13, 2013, 05:27:51 pm »
How are drifts on critical components on older ones compared to new ones?  Older models allowed you to calibrate by using a source kinda close to the book spec, then adjusting it to match a known instrument of higher tolerance, but the new automated production friendly digital calibration units are impossible to calibrate without having a calibrator that puts out the specified values. 

A meter without a calibration of known certainty is about as good as a ruler without graduations...
 

Offline Napalm2002

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Re: Old Fluke Multimeters
« Reply #90 on: November 23, 2013, 04:53:42 am »
Dr Taylor
Any luck on your IBM 8060a?
 

Offline drtaylor

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Re: Old Fluke Multimeters
« Reply #91 on: November 23, 2013, 05:44:01 am »
Dr Taylor
Any luck on your IBM 8060a?
I have been too busy to test my IBM 8060, so I have not put it up for sale yet. I have a full time day job, I do contract design at night, and play rock n roll on the weekend. So I apologize. I'm almost done with my current G-job and will work in checking and if necessary, repairing the Blue 8060. So sorry for the delay.

DRT
 

Offline Napalm2002

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Re: Old Fluke Multimeters
« Reply #92 on: November 26, 2013, 04:24:37 am »
Totally understand. I just got married and bought a house so I completely understand!
 

Offline ElektroQuark

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Re: Old Fluke Multimeters
« Reply #93 on: November 26, 2013, 07:44:24 am »
Napalm,

You will really understand when you have a couple childrens around you. They are timesuckers.  ;)

Offline Napalm2002

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Re: Old Fluke Multimeters
« Reply #94 on: November 27, 2013, 01:50:19 am »
Already there, lol 20 yr old 17 yr old 8yr old and I'm a grampa and I'm only 33!
 

Offline Marvin

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Re: Old Fluke Multimeters
« Reply #95 on: January 04, 2014, 12:48:15 pm »
Hi DRT! Thanks for really good information.

There has been recently (for a few years) army surplus Fluke 27/FM (not the usual 27 that Dave did a review and input protection tutorial on) coming to ebay etc. I bought one myself and was just trying to research it (it's not broken, just thinking about how it works etc). As this was produced exclusively for the US Army the schematic is unavailable (I have googled for days). The schematics for the the non FM model (so averaging non-true-rms) 27 are available from Fluke. So this was a long introduction but what interests me (and maybe someone else too) is that the 27/FM has True-RMS feature. And what is even more interesting is that it's not AD636, AD736 or some other Analog Devices true-rms converter but it looks like this: see attached image (image loaned from another forum).

With markings SC77174 that gives no google other results than a Chinese forum where someone just wrote that his 27/FM contains it. And it is clearly manufactured by Motorola.

Your posts about the original 8060 Fluke designed and Motorola produced rms converter chip is the only information about this on the internet! I was trying to find a rms converter chip manufactured by Motorola etc, to no avail until I found this thread!

Could this be the final model that had a true Fluke designed true-rms converter inside?
 

Offline drtaylor

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Re: Old Fluke Multimeters
« Reply #96 on: January 09, 2014, 05:15:47 am »
That is indeed the TRMS converter designed for the 8060. A Fluke Engineer designed and The fab line was, if I remember correctly, Motorolas BiFET. It had to have high performance bipolar transistors for the log-antilog circuitry. If you saw my 8060 initial schematic, it has a block diagram of that chip. I had some more detailed design docs, but it hasn't been seen in years. It's all moot since even Fluke could not get them after Motorola broke into parts.
 
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Offline Marvin

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Re: Old Fluke Multimeters
« Reply #97 on: January 09, 2014, 10:00:28 am »
Thanks DRT for the answer!

I now dove deeper into google and lo behold - MrModemheads 8060A repair has a nice picture of the original RMS chip and I'll be damned - it is even marked the same!

http://mrmodemhead.com/blog/wp-content/gallery/f8060a_00-4/F8060A_016.JPG

So it looks the US Army wanted a true-rms meter and Fluke used the in-house proven but expensive chip even though the 8060A series had already been changed to AD636. The 27/FM is basically identical to the 27 with just the added TRMS chip.

I had a call from Norm Strong around 1987 who wanted to ask me about design aspects of the components around the TRMS converter. I remember kind of laughing with him because he actually designed the Silicon. I said "com'on Norm, you're the one who helped me optimize it for wide bandwidth. How am I supposed to remember?"

I've seen only '87 and '88 date codes on SC77174 chips in 27/FM pictures on forums etc (with '88 being more widely seen, '87 I've see only on one picture). Maybe that is the reason he called you? :D
 

Offline Excavatoree

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Re: Old Fluke Multimeters
« Reply #98 on: January 09, 2014, 02:07:23 pm »
The same IC is in the 8026. .  I suppose it could be a "stripped down" 8060, but it's internals suggest that it is simply an 8020 that has been "souped up" by adding the TRMS capability. 

 

Offline ChrisGammell

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Re: Old Fluke Multimeters
« Reply #99 on: January 09, 2014, 04:05:55 pm »
We've asked Dave Taylor to be on The Amp Hour...and he agreed! He'll be on this week. If you have any questions you'd like us to ask him, let us know.

Forum thread here: https://www.eevblog.com/forum/amphour/drtaylor-(eevblog-forum-member)-on-the-show-this-week/
Subreddit here: http://www.reddit.com/r/TheAmpHour/comments/1uswuh/this_week_on_the_show_dave_taylor_designer_of_the/
 


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