Ok. Let’s try this again…RCA 9TC240 Alignment

[Chris K]

If we do move on to the adjustment of T-112, I'll need help! I'm confused by the instructions to input a signal and the sweep separately.

[Chris K]

I got it...just a change in signal input to V116 pin 1

[Penthode]

Can we finish T113 first? You still do not have the display right.

[Chris K]

Almost impossible to photograph these. Maybe I'll have to turn the overhead lights off. Anyway, good symmetrical trace adjusting T-112 with 21.25 at the peak. Very low signal input.

[Chris K]

Originally Posted by Penthode

Can we finish T113 first? You still do not have the display right.

What's wrong with it?

[Penthode]

Your sweep was too narrow and you could not see the baseline to achieve symmetry.

The x gain is too low and your sweep too narrow on T113 and your latest display.

[Penthode]

Just a bit more width so we can see the response skirts.

[Chris K]

Better????

[Penthode]

Now go to the 8601a and increase the sweep width

[Penthode]

You may have to go to the next click position and then reduce using the vernier. We want to see more of the waveform skirts left and right.

[Chris K]

[Penthode]

That's better! I wanted to see the left right of the S to see the baseline and symmetry..

[Penthode]

However could you ensure the 21.25 marker is set? It now says 21.06.

[Chris K]

Originally Posted by Penthode

That's better! I wanted to see the left right of the S to see the baseline and symmetry..

So good to move on to alignment of the sound IF, T-112?

[Chris K]

Originally Posted by Penthode

However could you ensure the 21.25 marker is set? It now says 21.06.

Yes it is set right on frequency and the bright dot in the center is the marker. The frequency on the counter is one of the curve apex markers