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Old 08-18-2020, 05:02 PM
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Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 15,445
Another thing to be aware of is in the entire decade of 50s TV IFs were transitioning from 21MHz IFs to 44MHz IFs....Some brands jumped quickly, some stayed late some would do either on the same chassis and which you got depend on wether you had UHF...
Most generators only did ONE IF band so you need to know what your set(s) use and what the generator can do before you buy. Also most generators that did 21MHz IFs are tube devices that need rebuilding and calibration which is well beyond beginner level. The 44MHz IF standard lasted to the end of analog TV so 60's-80's transistorized 44MHz generators are relatively easy to find working to calibration standards.

TV video IF alignment is not a task for a beginner unless you came from the ham radio community, have a degree in electrical engineering or were involved in something else that gives you a fairly in-depth knowledge of electronics theory.
I've read enough about it that 15 years into collecting and 5 years after receiving my BSEE this summer I reluctantly started to use the alignment equipment I slowly accumulated over the course of a few years.

Quote:
Originally Posted by BandDirector View Post
Welp, okay then. A new step one!

That was probably as succint as you could make it, so I will decode and process what you wrote. I think it worth my time and effort to find what you have suggested.

I jumped in too early and started gathering equipment before I understood what I was getting in to. There are a pair of local brothers that recently stopped taking non-commercial electronics work, they are the type that could help me find what I need.

I think I'll shoot them an email. I wish I knew what I could do what what I have.

This board is like a great hivemind, it just can only suggest and predict things like getting in over your head!

This scope mentions sweep and sync/triggering, what then is its purpose?
Triggering is usually for digital circuits and special applications like that. Depending on the triggering circuit the scope will either sync it's horizontal time base to a triggering pulse or sweep once and only once per each incoming trigger pulse. I've never needed to use the external triggering input of my scope for tube TV work.

I believe most TV sweep marker generators will require the scope to opperate in XY mode and give the scope both X and Y input.... Atleast that is how it works on my B&K 415.

Another word of advice, beware of Lab grade sweep generators....Many lab grade sweep generators can not provide wide enough of a frequency sweep to be useful for TV work and some don't work at TV IF frequencies...the first one I bought was a lab grade generator and mostly meant for audio (came in late to the auction I bought it at and couldn't look at it before it bidding), and I've seen many like it since.
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Last edited by Electronic M; 08-18-2020 at 05:06 PM.
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