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This is a continuation of a serious 7L5 restoration started last year. Here's where I left off:

Hi All: I am getting one. My question is... what do I (What can I) do with it?...I know it is/was intended for monitoring the NTSC television broadcast signal. I do have a pdf of the user/service

Wonderful! Now, we just need a million or so more of them. About twelve years ago, a large local auto dealership had a job fair. Entered apprentices would start at $17.00/hr plus full medical care and

"Sufficient output capacity" is unlikely. Those would probably need several amperes. Are you sure about the specs? The military aircraft I'm familiar with used 28V DC and 400 Hz 110 VAC 3-phase. I

Remember that a common FG will not be all that accurate in frequency, or have great edge speed. There are types that do, but not so common. The easy way is if you happen to have any kind of digital

He may need three phase. There are inverter control boards on Ebay that shouldn't be too hard to hack for 400 Hz.

Since you can see right through everything, it should be easy to check for sure which lines are actually broken open - then you don't have to guess from appearance and do unnecessary repairs. Ohm out

Cheapo function generator is in the mail - somewhere between Chicago and here now I believe. Building up my bench, so running a bit lean on things like this. But I figured a cheapo purpose built

Thank you. I was planning on putting 3V across..but was not sure if there was going to be an/ any other issue(s)...you have solved that question. (I had not studied the schematics yet, that is next,

Hi-fi amplifier of sufficient output capability driven by a sinewave generator sitting at 400 Hz? Harvey

There are a few very promising young people who are very interested though. I purchased a Tek 7844 on eBay - it was described as fully working. When I saw where the seller was located, I contacted him

Just thought I'd mention that you don't need to let the lack of a time mark generator hold you back. TMGs are convenient for what they do, but all you really need is a source of accurate enough square

Renée, The lithium battery on the display board and the GPIB/RS232/Centronics board provides backup power for the NVRAM on those boards. If the display board battery falls below 2.8 VDC (nominally

Thank you all for your interest and replies. /g/TekScopes/album?id=257176 I added some more pictures and there are duplicates that show the crack across some of the traces. Duplicate

A friend brought me the remains of three partially cannibalized 564 scopes once. I built one out of the three corpses. He was a contract broadcast engineer, but he wouldn't touch test equipment that

Hey Steve, I didn't read the code in detail, but it looks to me that the firmware dump and write is done with what looks like binary reads and writes. From what I understand or remember, the scope has

Thanks for the excellent description Raymond! Two things: I checked my working scope, and the range is precisely 10.00 turns. Mine starts at 0.25(5) (5 is estimated as midway between the 5 and 6 tick

Even though way off the off topic topic (parse that), still a fun discussion. I scored a box of 10 real gyros and logic pulled from DC-10s. Cute little rate gyro, etc. Problem is, all that stuff takes

The dial shows the delay from the start of the A time base to the start of the B time base in time units selected by the number on the A time base selector (if in the cal. position). Usually, this is

" Ummm, FairRadio (in Lima, OH) has (had?) some of the more common ones in back... - (No affiliation, just a customer)." Thank you David. I have emailed them, as you suggest. Their web site shows that