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  #1  
Old 10-18-2020, 12:35 PM
BandDirector
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New testing equipment check

Bias supply for eventual work for other projects
I have an RCA bias supply for tv work, too.

EICO Signal Gen Model 320
EICO Scope 435
Sencore CG18 Standard Color Generator
Senior and Junior VoltOhmysts

Can I now start advanced testing and learning? Because honestly I can't find anyone to do this! I would rather just teach myself.

Need to do tuner alignment, sound and video I-F alignments, etc. What else do I need?
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  #2  
Old 10-20-2020, 09:12 AM
Notimetolooz's Avatar
Notimetolooz Notimetolooz is offline
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Location: Dallas, TX
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Quote:
Originally Posted by BandDirector View Post
Bias supply for eventual work for other projects
I have an RCA bias supply for tv work, too.

EICO Signal Gen Model 320
EICO Scope 435
Sencore CG18 Standard Color Generator
Senior and Junior VoltOhmysts

Can I now start advanced testing and learning? Because honestly I can't find anyone to do this! I would rather just teach myself.

Need to do tuner alignment, sound and video I-F alignments, etc. What else do I need?
An audio generator would be handy.
To make sure the RF (EICO 320) and audio generator are putting out the correct frequency a frequency counter is a good idea.
Things like TV tuner and TV IF alignment are rather advanced things to take on, you have to make sure your equipment is good or you will make things worse. Many people try not to effect alignment when they re-cap and troubleshoot so that they can avoid re-doing the alignment on a TV set.
You really need a sweep generator to align the IF of a TV or FM radio.
The sweep generator should have a marker generator included or added.
A marker generator puts out several accurate frequencies at once to help identify the location of those frequencies on a sweep display.
I would avoid trying TV or FM alignment until you get more experience.
Aligning AM radios is a far better place to start
There also might be some accessories like demodulating probes that you may need.
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  #3  
Old 10-20-2020, 09:21 AM
Notimetolooz's Avatar
Notimetolooz Notimetolooz is offline
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Location: Dallas, TX
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Do you have an isolation transformer? You really should have one if you work on anything with a hot chassis.
Many people like to power things up for the first time using a variac and current meter. A dim-bulb tester is a partial substitute.
Since anything other than a AM radio may have many different tube types, and therefore too many types to have on hand for substituting, a tube tester makes sense.
Mostly you need to learn a lot about how things work and how they are built.
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  #4  
Old 10-20-2020, 09:33 PM
BandDirector
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The picture is fine (relatively speaking) but the audio is what is messed up. Somewhere in 4.5 mc trap is where I am slogged with the audio takeoff.
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