Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 16898306 times)

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Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5150 on: December 16, 2017, 09:01:41 pm »
Suzuki Jimny is good for getting off the middle of the roundabout you drove onto when you were looking at yourself in the mirror rather than the road ahead.

:)

When I was driving the Land Rover, nobody dared give me directions including "go straight over at the next roundabout". They knew my eyes would light up with a red glow.
That was the glow of the car in front of you was stopping [emoji28]

Oh, that's what the crunching noise was!
There are lies, damned lies, statistics - and ADC/DAC specs.
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Offline neo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5151 on: December 16, 2017, 09:15:05 pm »
My Heathkit ID-22 showed up with a couple big dents it didn't have pictured when i bought it, still nothing to prevent me from using it.
A hopeless addict (and slave) to TEA and a firm believer that high frequency is little more than modern hoodoo.
 

Offline Kilo Tango

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5152 on: December 16, 2017, 09:27:31 pm »
My TF930 appeared today. All nicely wrapped in bubble wrap. Except the front threshold knob is missing  :'(

It appears fairly accurate, the 6th digit may jitter slightly but its pretty good. Unfortunately my other frequency counter has gone in the huff so I can't compare figures however it matches the frequency set on my HP3325 on A and this radio mic seems pretty close on B.

Not bad for the dosh.  :-+

Ken
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5153 on: December 16, 2017, 09:31:43 pm »
My TF930 appeared today. All nicely wrapped in bubble wrap. Except the front threshold knob is missing  :'(

It appears fairly accurate, the 6th digit may jitter slightly but its pretty good. Unfortunately my other frequency counter has gone in the huff so I can't compare figures however it matches the frequency set on my HP3325 on A and this radio mic seems pretty close on B.

Not bad for the dosh.  :-+

Ken
Bad news about the knob, claim coming on I think. To cure the last digit jitter increase the time to 1 or 10 seconds and you'll have a rick solid display.
Who let Murphy in?

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Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5154 on: December 16, 2017, 09:42:07 pm »
I'm quite curious to see how it performs compared to the AFG-2125. That ones seems to show jitter on the third from last digit, which makes me question the whole reading, considering the two digits after that don't jitter.

Obviously, that's not a "real" frequency counter, but still.
 

Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5155 on: December 16, 2017, 09:54:26 pm »
Popped the top on my HP counter to see what LED digits to buy. Seems someone else was here before me  :o

At least they could have left me 2 LEDS  :-DD
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 

Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5156 on: December 16, 2017, 09:59:53 pm »
A plastic bag generating ESD inside your device. What could go wrong?
 

Offline Neomys Sapiens

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5157 on: December 16, 2017, 10:10:30 pm »
Obviously, that's not a "real" frequency counter, but still.

Ok, what constitutes a ''''real'' frequency counter''?
Does HP5334A with 10811-60111 suffice?
Does a DC503A?
Optoelectronics UTC3000?

Now I  am out of candidates, so I can only hope.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5158 on: December 16, 2017, 10:15:34 pm »
I'm quite curious to see how it performs compared to the AFG-2125. That ones seems to show jitter on the third from last digit, which makes me question the whole reading, considering the two digits after that don't jitter.

Obviously, that's not a "real" frequency counter, but still.
I've got 2 and I'm very happy with them both, they are only 3 or 4 digits apart in readings, well with the money and more.
Who let Murphy in?

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Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5159 on: December 16, 2017, 10:15:56 pm »
Ok, what constitutes a ''''real'' frequency counter''?
Does HP5334A with 10811-60111 suffice?
Does a DC503A?
Optoelectronics UTC3000?

Now I  am out of candidates, so I can only hope.
In this context it constitutes a device that's purpose built for frequency counting. Unlike the AFG-2125, which is an AWG with frequency counting tacked on.
 

Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5160 on: December 16, 2017, 10:17:29 pm »
I've got 2 and I'm very happy with them both, they are only 3 or 4 digits apart in readings, well with the money and more.
I expect it to be good, to be honest. Otherwise there's no point. I'm just curious how much the AFG-2125 will turn out to be out of whack.

It'd be fun to play with the universal counter too. Fire off a known number of pulses and see what the counter comes up with.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5161 on: December 16, 2017, 10:24:54 pm »
I've got 2 and I'm very happy with them both, they are only 3 or 4 digits apart in readings, well with the money and more.
I expect it to be good, to be honest. Otherwise there's no point. I'm just curious how much the AFG-2125 will turn out to be out of whack.

It'd be fun to play with the universal counter too. Fire off a known number of pulses and see what the counter comes up with.
Keep us posted on the outcome please, but I expect to be almost bang on the money, they are a good product.
Who let Murphy in?

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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5162 on: December 16, 2017, 10:54:12 pm »
My TF930 appeared today. All nicely wrapped in bubble wrap. Except the front threshold knob is missing  :'(

It appears fairly accurate, the 6th digit may jitter slightly but its pretty good. Unfortunately my other frequency counter has gone in the huff so I can't compare figures however it matches the frequency set on my HP3325 on A and this radio mic seems pretty close on B.

Not bad for the dosh.  :-+

Ken

I’d moan about the knob. See if you can get some more money off.

Some here btw that may fit: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F162785561174

I own a GW Instek bench meter. It’s rather good. You should be happy with the AWG if it’s half as good :)
« Last Edit: December 16, 2017, 10:55:58 pm by bd139 »
 

Offline ChrisLX200

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5163 on: December 16, 2017, 11:02:45 pm »
I like my Racal counters - a 1998 and 2202R. The latter I use as an external reference (or will do when I have the distribution amp set up). Both are accurate on their own - the first image is a 20MHz signal from my Siglent SDG1025 using its internal (upgraded) TCXO. The second image the SDG1025 is using the 10MHz external ref from the 2202R (albeit a firmware bug means it never remembers to use the external reference - even while it is saying it is doing so - so it must be reset in the config each time it's powered up). The 1998 is using its internal OCXO in both images - as is the cheap Chinese counter of course. With the distribution amp installed the two counters, SDG1025 and Tek scope will all be tied to the external reference provided by the 2202R. It's a pity the 2202r has such noisy fans!
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5164 on: December 16, 2017, 11:08:52 pm »
I like my Racal counters - a 1998 and 2202R. The latter I use as an external reference (or will do when I have the distribution amp set up). Both are accurate on their own - the first image is a 20MHz signal from my Siglent SDG1025 using its internal (upgraded) TCXO. The second image the SDG1025 is using the 10MHz external ref from the 2202R (albeit a firmware bug means it never remembers to use the external reference - even while it is saying it is doing so - so it must be reset in the config each time it's powered up). The 1998 is using its internal OCXO in both images - as is the cheap Chinese counter of course. With the distribution amp installed the two counters, SDG1025 and Tek scope will all be tied to the external reference provided by the 2202R. It's a pity the 2202r has such noisy fans!
Those chinese counters are really good I've got one too.
Who let Murphy in?

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Offline Kilo Tango

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5165 on: December 16, 2017, 11:21:41 pm »
My TF930 appeared today. All nicely wrapped in bubble wrap. Except the front threshold knob is missing  :'(

It appears fairly accurate, the 6th digit may jitter slightly but its pretty good. Unfortunately my other frequency counter has gone in the huff so I can't compare figures however it matches the frequency set on my HP3325 on A and this radio mic seems pretty close on B.

Not bad for the dosh.  :-+

Ken

I’d moan about the knob. See if you can get some more money off.

Some here btw that may fit: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F162785561174

I own a GW Instek bench meter. It’s rather good. You should be happy with the AWG if it’s half as good :)

Thanks for that, I'll keep it in mind when negotiations start.

Interestingly enough the TF930 matched the digits dialed in on the HP 3325A, but I used my R & S spectrum analyser as a cross check and it measures a different frequency.

who to believe ?

It doesn't really matter for me, measuring to 1 Hz in 1MHz is pretty good.

Ken
 

Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5166 on: December 16, 2017, 11:54:34 pm »
For most applications +- a bit won't matter for most of us but it doesn't stop us trying for more digits  :scared:

Going to replace all the LED's in my counter. Two are gone already and the one inside the meter is white not black. Going to cost me more than the meter  :palm:
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5167 on: December 17, 2017, 12:18:59 am »
Indeed. Honestly I can pretty much go fully analogue with what I do. Precision is rarely a consideration other than for absolute frequency and then that's usually within 20-50Hz or so for the narrowest of CW filters.

In fact all the effort I put into my last 2m receiver (144MHz) was done with an old Fluke 8024 with a homebrew diode probe and an uncalibrated Heathkit IB-1100 which only went up to 30MHz and that I had to build a new oscillator for because the old one was knackered. Didn't even use a scope because that blew up. Power supply was 8xAA batteries :D

Once every few weeks I slightly consider flogging everything and just going back to very basic equipment because I can get from A-B with it pretty well.

Then I remember the joy of opening a new toy  :-DD
 

Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5168 on: December 17, 2017, 12:20:25 am »
Bits for a GPSDO already on the way and Rubidium OSC on my watch list too  :-DD
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5169 on: December 17, 2017, 12:34:56 am »
Suzuki Jimny is good for getting off the middle of the roundabout you drove onto when you were looking at yourself in the mirror rather than the road ahead.

Back on the subject of TEA, I am now designing a GPSDO. I've found a suitable PLL loop (will test this evening with TH parts) and VCTCXO module all for under £15. Need a 1pps GPS module now and to work out how to do footprints in Kicad plus a few hours and it's order time :D

I am hooked on SMD stuff now. It's so much easier to put together.

SMDs are awesome for a lot of things in prototyping/one-offs... especially the smaller passives which lend themselves to being installed deadbug-style directly between pins of semis.


Got dumped today  |O So to alleviate the feeling I'm planning to buy another source meter  :)


A little retail/eBay therapy... it's a good thing. :D

I'm with mnementh, they were horrible POS. When we were young, dumb and full of cum it didn't matter what we drove as a 2nd class ride was far better than a 1st class walk.
We were all mostly OK with a spanner and you needed bugger all else to keep them running, just more parts.
Luckily just down the road lives a Landy wrecker  but he's a bit more as he trained in the Landy factory back in the UK before emigrating here. I sure spent a few $ there.  ::)


Good on some of you for bravely venturing into SMD as once you get your head around it and grab the few tools to make it possible then you'll wonder what held you back.
You don't need much, some smaller tips and maybe a skew/knife tip as you can bridge 2 pads and then sweep SMD passives off. Smart tweezers are a good investment but the good ones cost a bomb but the cheapies will get you by for some time. Hot air at some point makes most rework possible and if you're laying out your own PCB's pay particular attention to layout so to be able to access components for removal/replacement. You can get away from needing paste for small boards....I've got ~1kg of the stuff in the beer fridge that I never use.



That describes my first van to a tee... it was a pumpkin orange '64 "Walleye" Ford Falcon van. Still had the original 170 6-cyl, 4-wheel drums and 3-on-the-tree shifter. I bought it non-running for $75, then converted it to Ford electronic ignition and patched up the rotten floor and subframes in the evenings at the welding shop I worked at by literally lifting it straight up in the air on the huge trolley chain hoist that ran the length and breadth of the shop for handling steel.

The Orange Crate got me in more of the best kind of trouble than all my other vehicles put together. ;)


I had my first hot air rework station long before I ventured into SMD; it's very useful for all sorts of illicit salvage operations.  :-DD


mnem
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Her body tan and wet down at the reservoir...
At night on them banks I'd lie awake
And pull her close just to feel each breath she'd take.
Now those memories come back to haunt me,
They haunt me like a curse;
Is a dream a lie if it don't come true?
Or is it something worse...
That sends me down to the river
Though I know the river is dry..."    ~ Bruce Springsteen - The River
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Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5170 on: December 17, 2017, 01:09:58 am »
Meter porn for the morning.  :)

Backend of my Cambridge Meter. 1/4 for scale against the pivot wire.
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 
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Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5171 on: December 17, 2017, 01:18:09 am »
I like my Racal counters - a 1998 and 2202R.

First time I've seen a Racal 2202R. Made by Tabor? Looks similar to a 6010/6020 from the front panel design (option 4 adds the Rubidium oscillator). They also made similar-looking counters for Keithley (775/776).

I have a Tabor function generator and found that they made the same for WaveTek/Fluke and Keithley.
TEA is the way. | TEA Time channel
 

Offline bitseekerTopic starter

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5172 on: December 17, 2017, 01:24:13 am »
It's official! We did it! :o :clap: :popcorn:

1)EEVblog #751 - How To Debunk A Product (The Batteriser)9010
2)Flir E4 Thermal imaging camera teardown8341
3)Test Equipment Anonymous (TEA) group therapy thread5177
4)What did you buy today? Post your latest purchase!5095
TEA is the way. | TEA Time channel
 
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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5173 on: December 17, 2017, 01:30:13 am »
At this rate we'll be number 2 before the end of 2018, not bad considering we have only been going for less then a year so far. :clap:
Who let Murphy in?

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Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #5174 on: December 17, 2017, 01:33:02 am »
3)   Test Equipment Anonymous (TEA) group therapy thread   5177
4)   What did you buy today? Post your latest purchase!   5095

Given some of the likely suspects involved in both threads more like 10k  :-DD
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 


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