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

https://www.bulbtronics.com Part # 5149 The search for Oscilloscope 212 doesn't work, but its listed under the "Equipment using this product" tab.... David verizon.net@groups.io> wrote:

Please share the link you mentioned so I can check out their batteries. ALSO, beware that the power supply sections of some of the "2XX" models that use these batteries will not regulate unless a good

Hi Bob, Years ago I posted this information about the batteries I found for the model 214 which I own. With a little research comparing the battery size of your 211 to my 214 I think you will find the

I have a 2465A but don't have any idea where a motor like that is used. Any help?? Thanks, GerryR KK4GER

I'm not 100% sure, but I think that same motor is used in the HP 8640B (and, possibly, other models) as well. Thanks, Barry - N4BUQ

Yesterday I bought a model 211 scope at the Dalton hamfest. While it works I need to replace the batteries. He seller already has the batteries out and I assume they are bad. It works without the

Hi Mark.. Thank you for the links. Seems those threads have gone quiet. It might mean that the developers had no plans to offer a commercial outcome, but they supported open sourcing, or demand isn't

It is Tek part number 147-0035-00 and will fit Tek 465, 465B, 466, 464, 475, 475A, 475M, 2445 & 2465 series scopes. Greg