Re: cheap testing

From	Jan Panteltje <alien@comet.invalid>
Newsgroups	sci.electronics.design
Subject	Re: cheap testing
Date	2025-10-23 07:36 +0000
Organization	A noiseless patient Spider
Message-ID	<10dclt3$1f5nu$1@dont-email.me> (permalink)
References	(3 earlier) <10da60u$h1jt$1@dont-email.me> <omphfk10bakr48vki1g50sqd8c1eg6jvpq@4ax.com> <10dard3$djsj$2@solani.org> <10db3q4$pil7$1@dont-email.me> <tiuifkp5fnfdeh276mtun5rbtc4nbk848p@4ax.com>

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>john larkin <jl@glen--canyon.com>wrote:
>>On Wed, 22 Oct 2025 17:21:07 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>>Gerhard Hoffmann <dk4xp@arcor.de>wrote:
>>>>Am 22.10.25 um 16:17 schrieb john larkin:
>>>> On Wed, 22 Oct 2025 08:52:40 GMT, Jan Panteltje <alien@comet.invalid>
>>>> wrote:
>>>> 
>>>  Lunatic Fringe Electronics
>>>>>>>
>>>>>>> Ikea should never have stopped making these jerker desks, they are
>>>>>>> ideal for an office workbench.
>>>>>>
>>>>>> Those two oscilloscopes must weigh 100 lbs together. That bench is
>>>>>> plenty strong.
>>>>>>
>>>>>> But there's something weird about the Ikea varnish that makes most
>>>>>> optical mouses not work.
>>>>>
>>>>> I am using an Ikea table to do all computing, mouse works great on the white surface:
>>>>> https://panteltje.nl/pub/4_keyboards_IXIMG_0913.JPG
>>>>> Easy to connect a vice to it too, weight no problem,
>>>>> in use now for more than 25 years, Ikea makes great stuff.
>>>> 
>>>> Ours have a varnish finish. LED-type mice don't work.
>>>> 
>>>
>>>
>>>I have built the table in my home lab from 5* IKEA Pronomen wood sheets
>>>and a lot of legs, 12 large ones for the L-shaped main table and some
>>>short ones to create the 1st and 2nd floor.
>>>
>>>< 
>>>https://www.flickr.com/photos/137684711@N07/48043564871/in/datetaken/ 
>>>          >
>>>
>>>Cheers, Gerhard
>>
>>I use this for experiments, is basically a glass top garden table, put some cardboard on it, very strong it seems:
>> https://panteltje.nl/pub/table_full_of_experiments_IMG_3409.JPG
>> https://panteltje.nl/pub/ionising_desk_full_limit_MG_4117.JPG
>> https://panteltje.nl/pub/hardware_tafel_front_IXIMG_0349.JPG
>>Outside works too:
>> https://panteltje.nl/pub/h501s_drone_remote_power_test_ground_control_1_IMG_6276.JPG
>>
>>Even older table for experiments, is upstairs now, was a present in the nineties:
>> https://panteltje.nl/panteltje/pic/sc_pic/PMT_with_radium_in_bag_img_2482.jpg
>>
>>As to scope, my Trio 10 MHz analog does all I need.
>>even analog TV:
>> https://panteltje.nl/panteltje/scope_tv/index.html
>
>But digital scopes are so quantitative. And fast.
>
>https://www.dropbox.com/scl/fi/30n57vi1eyh4qtv6aytmd/Jitter_1us_delay.jpg?rlkey=ipmzjxrztdcekxc70la0w2dsp&raw=1

Yea, maybe I will design one when I need one.
For now I can get to 12 GHz spectrum with my xpsa spectrum analyzer and a simple RTL_SDR USB stick using downconversion from a modified satellite LNB.
 https://panteltje.nl/pub/spectrum_analyzer_IX_IMG_0699.JPG
2.4 GHz:
 https://panteltje.nl/pub/ADF4350_via_mixer_2.4GHz_dBc_R820_tuner_fractional_all.gif
  https://panteltje.nl/pub/2.4_GHz_to_1.5_GHz_mixer_circuit_diagram_IMG_4662.JPG
   https://panteltje.nl/pub/2.4_GHz_to_1.5_GHz_down_converter_closeup_IMG_4660.JPG
    https://panteltje.nl/pub/2.4_GHz_to_1.5_GHz_mixer_in_box_IMG_4661.JPG
An afternoon with the soldering iron, waiting for that scope to be delivered would take longer.

I cannot deny Rigol makes nice stuff for the money.
Could buy one, who knows what's going to happen with all those wars, sanctions and tariffs.
Will China still sell those to us?

All is relative ?

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cheap testing john larkin <jl@glen--canyon.com> - 2025-10-21 11:43 -0700
  Re: cheap testing ehsjr <ehsjr@verizon.net> - 2025-10-21 16:27 -0400
  Re: cheap testing JM <sunaecoNoChoppedPork@gmail.com> - 2025-10-21 23:20 +0100
    Re: cheap testing john larkin <jl@glen--canyon.com> - 2025-10-21 18:52 -0700
      Re: cheap testing Jan Panteltje <alien@comet.invalid> - 2025-10-22 08:52 +0000
        Re: cheap testing john larkin <jl@glen--canyon.com> - 2025-10-22 07:17 -0700
          Re: cheap testing Gerhard Hoffmann <dk4xp@arcor.de> - 2025-10-22 16:57 +0200
            Re: cheap testing Jan Panteltje <alien@comet.invalid> - 2025-10-22 17:21 +0000
              Re: cheap testing john larkin <jl@glen--canyon.com> - 2025-10-22 17:46 -0700
                Re: cheap testing Jan Panteltje <alien@comet.invalid> - 2025-10-23 07:36 +0000
          Re: cheap testing Joe Gwinn <joegwinn@comcast.net> - 2025-10-23 18:41 -0400

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