Author Topic: Mini review / teardown of 70's vintage function/sweep generator  (Read 3280 times)

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Offline w2aew

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Mini review / teardown of 70's vintage function/sweep generator
« on: January 02, 2013, 04:48:27 pm »
Here's a little video I put together showing the overall design, construction and layout of a 70's vintage sweep / function generator.  It's an interesting unit, with all of the I/O located on the front panel, and featuring fully discrete design.  The only integrated components are a handful of ua741 opamps, transistor arrays, 3-terminal voltage regulators and a quad 2-input NOR gate.


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Offline StubbornGreek

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #1 on: January 02, 2013, 05:45:16 pm »
I've have to say, I really enjoy your channel. You choose very interesting and relevant content, thank you.
"The reward of a thing well done is to have it done"
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Offline SeanB

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #2 on: January 02, 2013, 06:14:05 pm »
Lovely unit, very nicely laid out with the one and only logic chip hiding in front of the power stage.
 

Offline WV1800es

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #3 on: January 02, 2013, 06:34:59 pm »
Ahh, the Good Old Days, when controls were of a size and spaced so a man could get ahold of them!  A classy presentation on a classic design, Thank You!!
From a Million Miles Away.....
 

Offline w2aew

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #4 on: January 04, 2013, 02:04:17 am »
Ahh, the Good Old Days, when controls were of a size and spaced so a man could get ahold of them!  A classy presentation on a classic design, Thank You!!

The good old days, indeed! 
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YouTube channel: https://www.youtube.com/w2aew
FAE for Tektronix
 

Offline sorin

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #5 on: January 04, 2013, 03:52:46 am »
can you share the schematic...
 

Offline lowimpedance

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #6 on: January 05, 2013, 12:51:52 am »
I have an Exact 516 function/Sweep generator has a fmax. around 11MHz. Built in a rather sleek bench form factor casing.
I love the fact its all discrete, very easy to use and very functional.
Only minor repairs done, ie shorted tantalum's. But the switch contacts are noisy and using contact cleaner/lube will only work for a bit of time before another treatment is needed!.
« Last Edit: January 05, 2013, 01:05:52 am by lowimpedance »
The odd multimeter or 2 or 3 or 4...or........can't remember !.
 

Offline poodyp

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #7 on: January 05, 2013, 03:29:51 am »
Interesting design. I have a Wavetek 187 which is also from the 70s I believe, looks identical inside. It's interesting that all the connectors have caps, is there any reason they'd need to be shielded?
 

Offline w2aew

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #8 on: January 05, 2013, 03:56:32 am »
Interesting design. I have a Wavetek 187 which is also from the 70s I believe, looks identical inside. It's interesting that all the connectors have caps, is there any reason they'd need to be shielded?

I think it was designed for the military, and the caps were included to keep dirt out of the connectors.
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Offline jancumps

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #9 on: January 05, 2013, 09:13:51 am »
Great video. Together with your other one



 it 'll help to complete the hack that I'm doing to get at those sweep signals.
 :-+
 

Offline WV1800es

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Re: Mini review / teardown of 70's vintage function/sweep generator
« Reply #10 on: January 05, 2013, 11:36:36 pm »
This is a grand old firm I've been doing business with since the 70's- they're listing 2 - Exact units :
https://www.fairradio.com/catalog.php?mode=view&categoryid=178
The site has quite a bit of the unexpected, Enjoy~!
From a Million Miles Away.....
 


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