Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1805075 times)

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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10175 on: May 02, 2018, 02:17:06 pm »
Nice nab that, I've looked at those before but discounted them as being just another Tech TE-20D in a different format which it clearly isn't because its solid state. It also doesn't do FM modulation only AM but it sure looks in good condition.

I'm happy with my Advance unit, only has a single valve but works perfectly and even has a separate dedicated output to a oscilloscope so you visually see the response curve as well hear it but mine did cost another £5 over yours though. I did notice that like the Tech TE-20D the 96-450MHz band is done using harmonics, so it looks like its a modern version of the Tech jobbie.

Yep it is exactly a modern version of the TE-20D really which is a modern version of something far older.

Despite them not doing FM modulation, they do actually. The AM modulation sucks enough that it causes FM deviation as well  :-DD
Oh you stuck it up on a scope then  ;)
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10176 on: May 02, 2018, 02:18:22 pm »
Haven't actually yet. Will do that this evening. Radio is a poor man's spectrum analyser you see which is more RF'ey.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10177 on: May 02, 2018, 02:22:09 pm »
Haven't actually yet. Will do that this evening. Radio is a poor man's spectrum analyser you see which is more RF'ey.
Well the 20D does distort the output on MHz bands when the AM modulation is engaged so you could call it deviation  :-DD
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10178 on: May 02, 2018, 02:30:16 pm »
Haven’t worked out of that’s a bug or a feature yet but it works  :-DD
 

Offline Brumby

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10179 on: May 02, 2018, 02:55:25 pm »
Haven’t worked out of that’s a bug or a feature yet but it works  :-DD

That can be easy to answer depending on whether you are buying or selling.  When you're using it, though.....
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10180 on: May 02, 2018, 02:58:31 pm »
Yay, 3478A is being collected tomorrow morning by Parcelforce and being delivered to Corby, can't wait to get it back again. :-+
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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10181 on: May 02, 2018, 03:12:00 pm »
Well another quote is in, this one is £108 which includes return carriage but carriage to them is not covered so thats extra, so here's a top tip for the UK members, unless you really do require to have a certificate that is recognised world wide, then RS in Corby seems to be the best bet. Even with the world wide approval of UKAS certification, they still have managed to beat every quote so far by a large margin and included in their quote is the collection and return delivery of the meter so I don't think that they are going to beaten...unless you know otherwise?

Maybe this tip might be added to the POI?
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10182 on: May 02, 2018, 03:14:01 pm »
Indeed. Can't beat it. Let me know how it goes. Still haven't taken mine to Calmet yet so RS might get the job yet :D
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10183 on: May 02, 2018, 03:16:51 pm »
will do.
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Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10184 on: May 02, 2018, 03:19:39 pm »
Yay, 3478A is being collected tomorrow morning by Parcelforce and being delivered to Corby, can't wait to get it back again. :-+

Oh dear. It was all sounding so good, and then you hear that Parcelfarce are involved.  :(
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10185 on: May 02, 2018, 03:21:38 pm »
Yay, 3478A is being collected tomorrow morning by Parcelforce and being delivered to Corby, can't wait to get it back again. :-+

Oh dear. It was all sounding so good, and then you hear that Parcelfarce are involved.  :(
Honestly say that I have never had an issue with Parcelforce. Keeping my fingers crossed though  :popcorn:
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10186 on: May 02, 2018, 03:55:38 pm »
No problems here either. Once something went missing for a week and turned up but I’ve sent and received about 300 packages over the years without problems.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10187 on: May 02, 2018, 04:05:57 pm »



Dial calibration is about right ... 1/2% off on the higher ranges which is pretty normal for these.

 :-+
That range switch looks as if its just been installed, very nice.
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10188 on: May 02, 2018, 04:21:13 pm »
Indeed. I was quite pleased when I saw the condition. There is some damage to the front panel mounts as you can see in the right of that picture. Doesn't affect operation though and isn't visible when it's closed so meh.
 

Offline GerryBags

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10189 on: May 02, 2018, 04:53:37 pm »
Well, I just found the 2 resistors with the biggest drift in my limited experience. From 15 Ohms one had drifted to 355K and the other is either open or so high none of my meters can read it.  :o No scorching, or anything visible other than very slightly discoloured leads. The current inrush limiters they were across can't have been too happy with the situation. :-\
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10190 on: May 02, 2018, 05:05:49 pm »
Well, I just found the 2 resistors with the biggest drift in my limited experience. From 15 Ohms one had drifted to 355K and the other is either open or so high none of my meters can read it.  :o No scorching, or anything visible other than very slightly discoloured leads. The current inrush limiters they were across can't have been too happy with the situation. :-\
The ones that you can't read, do you know the value its supposed to be or checked the colour bands, it might be a Giga ohm resistor, I found one of these recently on a scope, never found one before.
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Offline GerryBags

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10191 on: May 02, 2018, 05:14:14 pm »
They're definitely meant to be 15R (brown green black) and I'm going from the schematic and specs in the service manual. i lifted a leg on each of them, in circuit the resistance was only about double what it should have been. I've replaced them both and now I'm getting what I expected to see.  :-//
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10192 on: May 02, 2018, 05:22:43 pm »
Oh thats great then, in my case the schematic had missed off the multiplier so it read IIRC 1 and due to the colour band discolouration that seemed to be correct but it was another member who informed me that it was meant to be 1Gohm and was able to prove it.
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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10193 on: May 02, 2018, 05:32:44 pm »

Dial calibration is about right ... 1/2% off on the higher ranges which is pretty normal for these.

 :-+
Came across this video on you tube, I think it is the earlier version of yours, valve driven?
Apparently not, it is a thick film IC powered generator.
« Last Edit: May 02, 2018, 05:44:07 pm by Specmaster »
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10194 on: May 02, 2018, 05:51:26 pm »
The LSG17 uses some typically obsolete Japanese ICs in it. These were discontinued so they got fed up of that kind of shit and knocked out a discrete SMD one instead, the 17A. This was the last design in that series before it was discontinued. A Chinese company bought the design and they kicked out cost reduced clones until about 2015 then replaced it with an even shittier design that drifts like a Saudi in a hire car.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10195 on: May 02, 2018, 05:54:53 pm »
haha, everyone knows that the fastest car is a hire car and even faster in the hands of a Saudi  :-DD
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Offline GerryBags

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10196 on: May 02, 2018, 06:24:36 pm »


 :-DD They've made it illegal now.... spoilsports!
 

Online bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10197 on: May 02, 2018, 06:34:25 pm »
Well another quote is in, this one is £108 which includes return carriage but carriage to them is not covered so thats extra, so here's a top tip for the UK members, unless you really do require to have a certificate that is recognised world wide, then RS in Corby seems to be the best bet. Even with the world wide approval of UKAS certification, they still have managed to beat every quote so far by a large margin and included in their quote is the collection and return delivery of the meter so I don't think that they are going to beaten...unless you know otherwise?

Maybe this tip might be added to the POI?

With pleasure. Added.
I TEA.
 

Online bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10198 on: May 02, 2018, 06:39:03 pm »
Nabbed a Leader 17A signal generator for £31 off ebay as untested. These things literally have nothing in them to go wrong. If they aren't smashed they will probably work. This is a very much cloned instrument by the Chinese. Lots of inferior clones exist out there, including historically from crap shifters Maplin. But alas this is the original made in Japan unit which has superior capacitors and surprisingly high tech innards!

I like these because of the manual control (try manually filter sweeping a synthesizer or finding the resonant point of a double tuned circuit - kill me!) and the price.



Neat. I hadn't seen inside one of these before. The clones certainly are prevalent on the 'bay. Added to the PoI index.
I TEA.
 

Offline orin

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10199 on: May 02, 2018, 07:01:43 pm »
The latest addition to my gear arrived today, a HP3466A but sadly because of poor packing, the handle is in 2 parts. It was all nicely wrapped up in bubble-wrap, but instead of folding the handle down and back so it tucks up between the feet, it was wrapped up out straight in front of the meter and suffered as a result :palm:. The seller has given me a £5 refund so thats helped.



Similar thing happen on a Fluke 8600A. But luckily it was just one corner rather than completely broken. Epoxy fixed it up.


Those handles on that kind of case always break.  It's just a matter of when.  Just glue them back together and be glad it didn't break while you were carrying it and let the meter smash all over the floor.
 


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