If I remember correctly the lower aluminum shaft is the switch shaft its self the upper one is just a chunk of round stock.

From a data sheet http://www.sdplastics.com/delrin/delrin[1].pdf it looks like Delrin is 500 V/mil but I will be honest I am quickly getting out of my depth here. Eric

Yes this part was 2 al inserts with 2 set screws each. There is then a short al shaft that goes up in to the knob and the knob tightens down directly on the shaft. In a later revision of the 177 this

In the mechanical of the 177 service manual I have it is part # 70 it is under the extension shaft it sits between the switch and the shaft that goes to the current per div knob. Apparently collector

As far as I am aware yes they are however there are some build differences and the knob is different as well as the lighting. Early examples have 2 lights later ones have a single light and a printed

Does anyone have or know how to duplication a 376-0144-00 This is a mechanical shaft coupler used in the 177 fixture. It needs to be insulated up to 1600 Vdc from the collector supply. This is one of

I am not saying it was Dennis's fault nor that we should change anything that is currently going on I am suggesting generating NEW low dollar transactions to get the reputation us so that this is no l

If there is an underlying issue with Dennis's pay pal reputation as this seems to be an ongoing issue and it is just a few button clicks to make badly written software happy If there is enough transac

Kyle once the covid is over ill take you up on that.

I would suggest Curious Marc's you tube channel and the living computer museum he is a part of. They have some very early stuff including a functioning PDP1. Eric

From having been through the adjustment process. I can say the dimmer tube that I have the brightness control does not appear to do anything for the over all brightness of the tube. I have checked the

I am working on some 577’s D1 storage curve tracers. I am trying to get a 178 working. So I need the storage tubes up and running. I do not have much experience with storage tubes hence the noob quest

I have some high quality T's on order so I will be able to get this done. Thanks for all the advice.

Simon, Yea this one really is that simple. A BNC T + a matched set of cables should do the trick. I expect the way this was built is the cables are soldered in the junction box after their length is c

OK I can understand that. But if the parameters are able to be so loose then why is this calibration fixture specified for so many different types of modules and scopes. 465 non B, 465B, 485, 7a26, 7A

I need this calibration fixture or something like it to calibrate a 7A22 and some 400 series scopes. This fixture is a BNC Y cable the important part is the Y side of the cable is matched length to wi

Hey Jeff isopropyl alcohol is probably one of the most used cleaners in electronics. And yes stay away from acetone on tek gear it tends to eat the plastics. Eric

With all the oils and lubricants being mentioned I feel I need to reiterate something that is stated in the service manuals..DO NOT USE ANY lubricants on the scopes high frequancy attenuator switch co

Greg i have to disagree with you on this one. Tektronix them selves used to have a product called "no noise" this was actually replaced with wd40. A can of wd40 actually has a tektronix part number. T

Jeff contact me off list and we can see what we can work out on the calibration. But tek them selves is a calibration option as well I called them about a 465 a while back and they quoted me $100.00 f