Hello everyone, I'm here to sell my Tektronix 191 Constant Amplitude Signal Generator. It's conditions seems to be fine and it works pretty well. Hoping to get $119 out of it.
I also have an eBay listing for it here:
https://www.ebay.com/itm/166322388176?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=CTI57OxBQDq&sssrc=4429486&ssuid=CTI57OxBQDq&var=&widget_ver=artemis&media=MOREI'll insert the listing description here:
Brief Description:This is a Tektronix Type 191 constant amplitude signal generator. It can output 50kHz and 350kHz-100MHz sine waves at calibrated Pk-Pk amplitudes.
As seen in the last few images, it works very well, but I can not guarantee it works perfectly because if it's age.
However, from what equipment I do have, amplitude accuracy on for frequencies below 50MHz seems very accurate. But going above that, the amplitude seems to be going up? This may simply be poor quality cables or that fact that the 50 ohm termination happens right at the output. of the generator and not the scope input. Using a Tek 475 with a very much direct connection gives perfect results.
Frequency accuracy is the best I've ever seen considering it uses an analog dial. Set it exactly on 4MHz on the dial, outputs almost exactly 4MHz. My scope is not the best so it's very likely the scope is off in frequency and not the Tek unit.
This unit was tested mainly on a Tektronix 2230 100MHz oscilloscope and a Tek 475.
What You'll Receive:You will receive the Type 191, a frayed electric power cord, and a Tektronix PN: 017-0083-00 GR to BNC adapter with built-in 50 ohm termination.
You will not receive the oscilloscope. I've had a buyer in the past argue that they thought a BK Function Generator came with the oscilloscope. Again, you will not receive the oscilloscope or any kind of oscilloscope.
Testing:If you do end up buying this unit, and are meeting up, you are welcome to fully test it yourself if you want to. You may bring your own test equipment. I have a couple oscilloscopes myself I could bring out.
Cosmetics:For cosmetic condition, please look at the photos. Personally, I think it looks quite alright for being almost 60 years old.
Other Stuff:Please do your research on this unit before considering buying it. There is a wonderful Tektronix wiki about all sorts of Tek equipment called w140. Has manuals and everything there, for free!
Price is negotiable so don't hesitate to reach out. I will offer a $30 discount for engineering students. However some kind of proof will be required.
This could be used as a good old signal generator, a function generator, even though it only really... well... has one function. An oscillator, because that's what it is, or a calibration standard. Good to calibrate oscilloscopes. Or create sinewaves on an oscilloscope.
This is where the eBay description ends. But here I'll make another offer. If you can come and pick it up yourself without shipping in Sacramento, California, you get to pay only $100. But then the student discount is reduced to $25.
I'm just trying to free up some space on my workbench... and get some extra cash, only to inevitably buy 2 more pieces of test equipment to fill up even more space.
I have 2 of these and I'm hoping to keep the other one for myself as it's in a slightly better cosmetic condition and I already recapped, and refurbished it. However, for the right price, I can sell that too.
Edits made reduced price from $149 to $119.