1956 RCA CTC-5 is ALIVE!

[bigaudioal]

Originally Posted by Electronic M

Key with any roundy is to adjust the horizontal linearity/efficiency coil for minimum H output cathode current (it will be a dip) using a 0-250mA or 0-500mA meter in series with the cathode. Should be covered in sam's horizontal adjustment procedure.

It is also wise to look at the H osc. waveform on a scope to make sure it is correct, and check the grid drive of the H output tube before the current dip to ensure the tube is being driven properly.

Thanks. Nick Williams is going to drop by sometime soon and hopefully help me check all this. I do know where the horizontal linearity/efficiency coil is and this check looks fairly simply. Just set meter to mA's and hook between chassis ground and the exposed top of the horizontal sweep output fuse (after replacing it with new fuse). Then tweak the coil for the minimum mA reading.