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Test Equipment Anonymous (TEA) group therapy thread

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med6753:
Decisions, decisions...which one do I use??  :-// The new 2465 now occupies the spot above the 2465 DMS previously occupied by a B&K 2120. The 2120 has been a loyal servant since I purchased it new in 1991. Gonna put it in "storage" but kept fully functional.

I mentioned before that it appeared that the sweep cal on the new 2465 was off. It isn't. It's right on. The problem is the detent on the var sweep pot is a little flaky and needs a cleaning. Next time I open it up I'll take care of this minor issue. Other than that I haven't found any other issues and I've put perhaps 10 to 15 hours on it.

bd139:
Attempts to reproduce the functionality of the Tektronix 130 going well. the original unit:



Reference oscillator and mixer working. This allows me to do frequency comparison of the reference oscillator and a signal generator.

Simple bit of kit really, especially now it is devoid of tubes. Left to right: colpitts oscillator ~140KHz, buffer, attenuator, mixer (diff amp). Yes I know it's on a breadboard - will deal with the problems associated with that later on :)



Output near zero beat. Notice the low frequency component which is close to 100Hz despite both inputs being around 140KHz



Next stop: LPF the output to get the LF component out, amplify and clip, integrate.

Why buy a Tek when you can build your own! :D


--- Quote from: med6753 on May 17, 2018, 01:19:24 pm ---Decisions, decisions...which one do I use??  :-// The new 2465 now occupies the spot above the 2465 DMS previously occupied by a B&K 2120. The 2120 has been a loyal servant since I purchased it new in 1991. Gonna put it in "storage" but kept fully functional.

I mentioned before that it appeared that the sweep cal on the new 2465 was off. It isn't. It's right on. The problem is the detent on the var sweep pot is a little flaky and needs a cleaning. Next time I open it up I'll take care of this minor issue. Other than that I haven't found any other issues and I've put perhaps 10 to 15 hours on it.

--- End quote ---

Moment you put the B&K away the tek will blow up :)

mnementh:

--- Quote from: med6753 on May 17, 2018, 01:19:24 pm ---

Decisions, decisions...which one do I use??  :-// The new 2465 now occupies the spot above the 2465 DMS previously occupied by a B&K 2120. The 2120 has been a loyal servant since I purchased it new in 1991. Gonna put it in "storage" but kept fully functional.

I mentioned before that it appeared that the sweep cal on the new 2465 was off. It isn't. It's right on. The problem is the detent on the var sweep pot is a little flaky and needs a cleaning. Next time I open it up I'll take care of this minor issue. Other than that I haven't found any other issues and I've put perhaps 10 to 15 hours on it.

--- End quote ---

A bee-yoo-tee-full soyt t' see! Jesst war-r-rms th' cockles of me 'eart, it duzz!! (Whatever-r-r th' 'ell they ar-r-re!)


mnem
And so my army grows!  Bwa-ha-ha-ha-ha!!!  >:D

Specmaster:

--- Quote from: bd139 on May 17, 2018, 01:24:37 pm ---Attempts to reproduce the functionality of the Tektronix 130 going well. the original unit:



Reference oscillator and mixer working. This allows me to do frequency comparison of the reference oscillator and a signal generator.

Simple bit of kit really, especially now it is devoid of tubes. Left to right: colpitts oscillator ~140KHz, buffer, attenuator, mixer (diff amp). Yes I know it's on a breadboard - will deal with the problems associated with that later on :)



Output near zero beat. Notice the low frequency component which is close to 100Hz despite both inputs being around 140KHz



Next stop: LPF the output to get the LF component out, amplify and clip, integrate.

Why buy a Tek when you can build your own! :D


--- End quote ---
Looking really good, just don't blow it up  :-DD

Other news, still no sign of RS returning the meter, have emailed them now and asking WTF is going on, 5 day door to door service Yah, pull the other one, even factoring in the May bank holiday doesn't extend the time to 10/11 days  :scared:

bd139:
Ask for your money back when you get the meter back.

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