|
I have an early 1950's Zenith console which has a variation on this setup...it uses an autotransformer to supply a higher voltage to the rectifier for higher plate supply voltage but has the filaments in a series string and a hot chassis.
I'm not sure why they would have used just a filament transformer on your set with a hot chassis? What is the tube line-up, are they all 6V or 12v filament tubes? I have seen setups like this on tube type color TV's with a hot chassis, but it is often an autotransformer with taps for the CRT filament and then other tube filament strings in series...this setup is because most color CRT filaments draw a different amount of current than the amplifier tubes in it but not sure why a radio would do it?
They probably looked at the cost of a full power transformer and decided it was too much but still it seems strange.
|