1971 Magnavox 1T5034 19" B/W Hybrid

[Findm-Keepm]

Looks like a T94X chassis - perhaps a T946? Tube complement of 17BF11, 21LR8, 8FQ7, 22JU6 and a 17CT3, with a 1K3 HV rect.

If so, there's a 4.7 ohm fusible feeding D6, the B+ rectifier. Some of the models with quick-on have a DPST on-off switch, and you may have the B+ side open up (filaments, but no B+). B+ is 140 volts or so. Easy way to check for B+ is right at the red lead to the audio output transformer - should be ~120 to 130VDC at the red lead.

Hope this helps! Fixed many of those old Maggies!

Cheers,

[fsjonsey]

Originally Posted by Findm-Keepm

Looks like a T94X chassis - perhaps a T946? Tube complement of 17BF11, 21LR8, 8FQ7, 22JU6 and a 17CT3, with a 1K3 HV rect.

If so, there's a 4.7 ohm fusible feeding D6, the B+ rectifier. Some of the models with quick-on have a DPST on-off switch, and you may have the B+ side open up (filaments, but no B+). B+ is 140 volts or so. Easy way to check for B+ is right at the red lead to the audio output transformer - should be ~120 to 130VDC at the red lead.

Hope this helps! Fixed many of those old Maggies!

Cheers,

The Tube Compliment is an exact match. I'll take a look at that fusible resistor and the power switch tonight.
Thanks for the great advice!

[fsjonsey]

It was the resistor!

I clipped out the old resistor in line with D6, temporarily tacked a new 4.7 ohm 5W wirewound under the board, and the set came right up!

There seems to be one issue from the get-go. The CRT seems to be a bit out of focus around the edges. Is there a way to adjust this, or is it just a weak tube?