Magnavox First Color TV

[Electronic M]

The first Magnavox branded color set I know of was a 1955 CTC-4 clone/rebadge (I have the Sam's folder) with virtually no difference between it and the RCA CTC-4 Director. The major difference was that(since RCA's audio stage was part of the power supply) Magnavox left the CTC-4 audio output stage disconnected from the speaker and took a lower level audio feed from the TV chassis and fed it to their own(quite nice BTW) audio chassis then to the speakers.

[Eric H]

Originally Posted by Electronic M

Magnavox left the CTC-4 audio output stage disconnected from the speaker and took a lower level audio feed from the TV chassis and fed it to their own(quite nice BTW) audio chassis then to the speakers.

Interesting, they did the same thing to a high end 1955 B&W set that I had.

Their Amps from that era are top notch and sought after today by Audio types.

[NewVista]

Originally Posted by Eric H

Their Amps from that era are top notch and sought after today by Audio types.

I will be interested to see how this Stereo PP 6L6 Amp sounds - I'm making it
from multiple 1940's Magnavox mono radio/Phono chassis.
Their PP 6L6 O/P transformers had old Magnavox Logo of Lion
roaring from 1920's Hornspeaker ! Gave contoured logo a black
background for contrast.

[mstaton]

Originally Posted by Electronic M

Magnavox left the CTC-4 audio output stage disconnected from the speaker and took a lower level audio feed from the TV chassis and fed it to their own(quite nice BTW) audio chassis then to the speakers.

My '63 CTC-15 clone is exactly the same way. The audio board is quite bare, only 1 tube. It has the other 2 sockets but no supporting components. It is fed into the preamp and then to the audio amp. I guess these single ended 6BQ5 amps are pretty sought after. They are supposedly class "A" but don't quote me on that.

[Electronic M]

Originally Posted by mstaton

My '63 CTC-15 clone is exactly the same way. The audio board is quite bare, only 1 tube. It has the other 2 sockets but no supporting components. It is fed into the preamp and then to the audio amp. I guess these single ended 6BQ5 amps are pretty sought after. They are supposedly class "A" but don't quote me on that.

From what I recall of the schematic the audio output board of the TV chassis was completely populated and ready to drive a speaker they just never connected the speaker to the audio output transformer on the TV chassis(which feels like a waste of parts!) and instead ran a line from the first audio amp(or detector, but I'm pretty sure they picked it off soon after the volume control) and fed it to their own separate audio chassis which drove the speaker.

[mstaton]

Originally Posted by Electronic M

From what I recall of the schematic the audio output board of the TV chassis was completely populated and ready to drive a speaker they just never connected the speaker to the audio output transformer on the TV chassis(which feels like a waste of parts!) and instead ran a line from the first audio amp(or detector, but I'm pretty sure they picked it off soon after the volume control) and fed it to their own separate audio chassis which drove the speaker.

Mine is not done that way, no output transformer. The volume control is the one used for the stereo so they cant pick it off from there. maybe the older sets are that way without the stereo. All the parts to drive a speaker are not there on this chassis(C43).
As far as the chassis is concerned, it is RCA. All the same tubes and components. It's just modified in the audio output and power on/off controls. Flyback failures in this set are no more common than RCA sets.