from Tim P (UK) Interesting - there seems to have been a lot of effort put into getting these 'early' (60's) films on-line. I looked at another one about NASAs computing and there was a brief shot of

From Tim P (UK) What is meant by 'external arms calibration box' for the Type 'Q' plug-in ? is it just 4 120 Ohm resistors in a bridge formation ? many thanks Tim

From Tim P (UK) I notice that much Tek equipment has (f'rinstance) a T092 package in a T05 socket. (I am looking at the vertical amp in a 547 in this instance) Was there a 'forming tool' for the trans

from Tim P (UK) What was involved in using the rear-panel outputs on the 502A ? Just a straight pick-off with a terminating resistor from 'somewhere' on the Y-amps and Sweep circuitry ? Tim

from Tim P (UK) re that blue sticker - I don't know what USAFC is (US Air Foce-something?), but I think UCLBL is University of California Lawrence Berkley Laboratory. Does it glow in the dark ? :-) Ti

from Tim P (UK) I am pretty sure that the Mercury relay doesn't like being upside-down - something to do with the capilliary effect between the contacts. I have an 'S' and an 'R'. Also a 109 and 110.

from Tim P (UK) Interesting ! I have an'add-on' Sync Seperator box (015-0016-00) which outputs selected line or field sync to the delayed sweep trigger. I had an old analog camera with the lens covere

from Tim P (UK) OP: I looked around in the case more and found that the black connectors in photo B are Tek part# 103-0051-01 which fit on the P6101's that were in the case. But the pink attachment is

from Tim P (UK) I am looking for a download of the Measurement Concepts book 'Automatic Testing Systems' I'm sure I once had a copy, but deleted it, and now can't remember where I got it. (Not from th

from Tim P (UK) The 1S1 can run in either of two modes - Equivalent-time sampling, where the mainframe scope is driven by the H-out of the 1S1, or real-time sampling, where the 1S1 sweeper is switched

from Tim P (UK) It uses the P6032 CF probe. There is also a rather neat little TDR pulser, Type 281 (if you can find one) Like all samplers, it can suffer from sick Tunnel Diodes, or a blown diode-bri

from Tim P (UK) Hi, fred - could you provide the reference to the Williams AppNote for probe characterisation please? Many thanks I have a lot of probes, mostly Tek (P6008, P6017 and others of that ge

from Tim P Mostly the small-signal sockets. In the 1S2 there are lots of 2N3904 / 6 in those brown cube-like sockets. The flat pins seem to tarnish under the solder. T

from Tim P (UK) just delving into my 1S2 TDR plug-in; I notice some of the solder joints, especially around the transistor sockets are poor. Looks as tho the solder has 'crystallised' with age and no

from Tim P (UK) Anyone recommend a substitute for the SU2095 Dual FET? part# 151-1003-00 used in the 1S2 TDR plug-in. (nothing on Qservice) many thanks Tim

from Tim P (UK) Recently started using my old 544 scope; was OK for a while, then started emitting a fizzing noise. Upon opening up the HV compartment, saw a continuous arcing around the large capacit

From Tim P The heat sink is blue, as is the innards of the battery box.

from Tim P (UK) Just curious; I have a Tek 321 (#000929) where the covers etc. are not 'Tek-Blue' but a kind of cream / off-white colour. It reminds me of the colour often used on medical equipment. I

from Tim P (UK) Fred - I'm glad to see you have 'dived-in' to the 1S1 ! I have four of the beasts - 2 work OK, one works if it gets a good sharp trigger and one has never worked at all. I would be ver

from Tim P (UK) Ah, but ...... My 1S2 is serial# 000191, an early version without the pre-set adjustments on the front panel, and no proper test points on the voltage regulator board. I got a paper ma