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The delay relay closes its contacts which energises the coil of a conventional relay which a: shunts the contacts of the delay relay, thus maintaining itself closed and b: disconnects the heater

I know nothing about it, but here's a hint: the 7D02 will surely have some software in the personality module -- probably the disassembler or dissassembly tables, etc. I don't know whether there is

As far as I know there is only one delay relay. It kicks in after the tubes have had a chance to warm. The only time mine ever kicked out was when the thermal protection tripped, which it will do

Anyone out there might happen to have one of these puppies?? The whole board would be even better. If so, let me know what price you want. Meanwhile I'm trying Deane too. Any replies appreciated.

<michael.petereit@...> wrote: so far but try what you suggested. start after around 1 minute a relais was working i the back, below the big fan. After another 30 sec the relais release with a big

Dave, I fond that thread but it didn't gave that conclusion. I used alcohol for slight mud, this scope was placed in a dirty an humid cellar for years without it's coverage. The aluminium is best

Well, all tubes below the CRT are working. I didn't checked the CRT so far but try what you suggested. Btw: The startup behaviour of the scope is strange. On the first start after around 1 minute a

I was recently given a tek 211 portable scope in bad condition. It will not be repaired, as i'm a tube type guy, but will be converted to a scope design of my own, for monitoring purposes. If anyone

Before you go too far with the chassis cleaning and wholesale tube testing, check and repair the low voltage power supplies first (be especially wary of the bypass capacitors across the precision

you might be able to just take the "video" output from the detector and run it into an audio amp for fm just demodulate it by slope detection "tune off peak and use a fairly narrow filter"

deane kidd might have the paper manuals

Check the archives. Craig

As it's strictly for monitoring NTSC standard video signals only, and can't be used for high definition signals at all, it's of little use and will only become less useful as time goes on. Only those

Basically, the 576 is 7000 technology, the 577 is 5000. The 576 is bigger, MUCH heavier, and capable of more test current. The 577 has opamp and voltage regulator test fixtures which (I think) the 576

Hello! After some time looking around, I have finally bought a 577/D1 curve tracer with the standard 177 fixture. I wonder which are the differences with the more expensive 576. What would I be

Ok, thanks. I thought it was something like that, obviously not that useful instument, unless you are doing video then. With best regards Tomas Larsson Sweden http://www.tlec.se http://www.ebaman.com

"Tomas Larsson" wrote: Hi group. Stumbled across a Tek 528 Waveform monitor. What is it, and what was it's primary use? Cant find any info more than pic's. With best regards Tomas Larsson Sweden It's

Tomas, It was used by TV stations to monitor video waveforms. Made in NTSC and PAL versions, I think. Bill Roberts Tomas Larsson wrote:

Tomas The Tektronix 528 waveform monitor is used in the TV industry to monitor the video waveform. The scope is graduated in IRE. A proper waveform will have 100 IRE of video and 40 IRE of sync. The

I haven't messed with the 10 MHz output, but try feeding it into a general-coverage receiver and see what the levels are like. Zero span will definitely be needed. For paper manuals, QService is great