Hi to All, We all know the influence of sunlight on the red lettering and knobs of Modules. A spectrum of dark red to orange or even yellowish brown is sometimes the endresult. But I think the other

Hi to All, Some time ago I picked this Demo Board up without any instructions attached. On internet there are no "real" hits. Also Hakan Hintze didn't have any information on it. Maybe someone on

Being cheap I ordered this one which are NiCd. https://www.amazon.com/gp/product/B071VZLKC9/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 Bob

Data for 3160-0497is located on web page: https://www.wbparts.com/rfq/4140-01-081-6260.html Glenn -- ----------------------------------------------------------------------- Glenn Little

Be careful, those are probably NiMH packs. The simple charger in the 211 will quickly ruin NiMH cells. The Bulbtronics pack is NiCd. Here's an updated

I'll spend some time studying the Parametric Measurement circuit and theory, if for no other reason than to marvel at how the Tek engineers designed such a thing, and, well, "just because." A big part

Hello everyone. I have a 2467B that I bought a few years ago, and I never used the automatic measurement functions. Today I decided to test this and I think the scope is defective in this

Hi Greg, I assume HP had two different designs for the fan during the run of the instrument. I've had three of them and I'm pretty sure all three have had the Siemens motor. One of the fan

https://sfbay.craigslist.org/nby/ele/d/sebastopol-tektronix-547-oscilloscope/7077862175.html Dang! Looks in good shape! (From 1805 miles away...)

I'm not affiliated with the seller, just passing it along... https://sfbay.craigslist.org/nby/ele/d/sebastopol-tektronix-547-oscilloscope/7077862175.html

Barry, It appears that there is sort of a judgment call on the fan motor used in the 8640B signal generator. Looking in the 8640A manual that I have (08640-90114) the motor is definitely called out

Yes, unfortunately I could not find it either. Dennis Tillman W7pF

I could not find the pack listed at the link you sent. But I think the 5 in line AA's is a common item. I saw some at Amazon for less than $5 each. And my local Batteries and Bulbs store probably

GerryR, There are very few 2465As that use this motor, unless you have OPT 01, the DMM option. You can tell externally if yours has this motor or not by the small vent on the rear cover. Looking at

The trigger hybrid triggers the A and B time base hybrids, and they feed their gate signals (/SG) into the the PAL U975, which chews on them, and feeds FF U980B, which talks back to the PAL, which

I tried cleaning and deox'ing the Trigger Hybrid, but the problem remained. Swapped it out with another chip, and still not change, or at least no meaningful change. (Curiously the error text from the

Hi Greg, The P/N for the fan motor in the 8640B manual (TM 9-4935-601-14-7&P) shows it to be 1AD3001-OA. Thanks, Barry - N4BUQ

It was pretty stupid of me to forget the link. This is the email I wrote years ago: Note: the link is broken across 3 lines. It is very hard to find this battery pack on this site so use the

I have washed many 500 series scopes (and other boatanchors) over the years without any fancy equipment and have had very good results. I posted a set of photos a few years ago of a 547 wash and you

Barry, The fan in the HP 8640B is a simple 2-terminal DC motor. The Siemens device is a 13-terminal brushless Hall Effect motor that requires external excitation from a more elaborate switching