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From: Glenn Ford <glenn778@...>
Subject: Re: [TekScopes] PYRAMID CALIBRATOR AND TESTER FOR TEKTRONIX OSCILLOSCOPES
To: TekScopes@...
Date: Wednesday, February 20, 2013, 4:47 PM

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I will take one of those pyramid calibrator. lmk, Glenn R. Ford --- On Wed, 2/20/13, Bob Albert wrote: From: Bob Albert Subject: Re: [TekScopes] PYRAMID CALIBRATOR AND TESTER FOR TEKTRONIX OSCILLOSCOPES To: TekScopes@... Date: Wednesday, February 20, 2013, 2:45 PM ? Well it seems that $25 plus $5 for shipping is the price. If you want one, let me know. Bob --- On Mon, 2/11/13, Richard Solomon wrote: From: Richard Solomon Subject: Re: [TekScopes] PYRAMID CALIBRATOR AND TESTER FOR TEKTRONIX OSCILLOSCOPES To: TekScopes@... Date: Monday, February 11, 2013, 4:12 PM ? $1 each and you ship !!!! Seriously though, put a price on them and let folks decide if it's OK or too much. 73, Dick, W1KSZ On Mon, Feb 11, 2013 at 4:35 PM, Bob Albert <bob91343@...> wrote: ? I have several of those Tek evaluation boards.? Put in a 9V battery and you are set to go.? Manual available on line.? Make offer. Bob --- On Mon, 2/11/13, Dave Daniel <kc0wjn@...> wrote: From: Dave Daniel <kc0wjn@...> Subject: Re: [TekScopes] PYRAMID CALIBRATOR AND TESTER FOR TEKTRONIX OSCILLOSCOPES To: TekScopes@... Date: Monday, February 11, 2013, 3:24 PM ? Got it. I found the thread. See the TekScopes thread entitled "Scope Tester on Ebay" (around 12/22). Reed Dickinson sent an email owning up to being the designer and seller of these. Cheers, Dave On 2/11/2013 2:36 PM, Pa4tim wrote: ? Nice build cabinet, could be a handy tool. But strange he uses 75 Ohm bnc connectors for a 50 Ohm output. ?Also rather expensive For that price you can make a very nice one yourself.? Just a uProcessor to generate some squares, or maybe a Xtal and something like a 4060, for higher frequency and trigger test you add the cute little Jim williams pulser. Williams also has a schematic of a very simple timemark generator ( i do not the app note from the top of my head) a TL431 or LT1027, a good opamp and some 1% resistors and a switch to make some accurate voltages ( a scope is 2 to 3% so this will be close enough)? It does not matter if frequency is not in all exact steps. For a test its OK to see if the ranges still work. I think for real calibrations this is will not be enough , it only goes up to 1uS/div and for buy-checks it can do more than needed.? If I needed one I would use this as a base :? the Tek evaluation board we reverse engineered around 2 or 3 years ago here on the group. And add this :? if you want use a switch and resistors to make fixed frequencies. 500 ps Tr and 16-160 MHz in 3 ranges so if you use 5 resistors and two switches you have 15 frequencys. Total cost maybe 10 dollar in parts, 10 bucks for a nice cabinet so you can spend 130 dollar for another scope ;-) Fred PA4TIM Op 11 feb. 2013 om 21:54 heeft Dave Daniel <> het volgende geschreven: ? This instrument was specifically discussed a while back. I'm trying to locate the emails I have; I can't recall whether it was in open forum or a series of private exchanges. The person who is selling these wanted something that he could carry around to Hamfests and other places and use to quickly evaluate 'scopes before he bought them. It looks like a very nice instrument to have, IMO. Dave On 2/11/2013 1:47 PM, ukchastuck wrote: ? Anyone ever tried one of these: to test and calibrate Tek oscilloscopes? The ebay description of the Pyramid Generator implies it can be used to reliabily set vertical amplitude calibration, horizontal time calibration and triggering capabilities. Seems you get a lot for your money if it works. Regards, Charles