1969 Zenith AM radio

[Adam]

After replacing the usual leaky power supply filter caps it works good.

I was hoping to find a Zenith AM-only table radio with a plug-in transistor chassis like my 1966 console stereo has, but this isn't it. This is a 1969 Z model, with a 1968 Y chassis. And all the 1967 X chassis AM-only Zenith radios I've seen were tube, so I was thinking if there was such a thing, this would be the most likely to be it, but it isn't. So did Zenith make such a radio? Does anyone have one?

[zeno]

IIRC only the owl eyes & TO's had plug in semis.
And of course the big stuff. In fact I dont remember any AM
only solid state table radios, just AA 5's.

73 Zeno

[rca2000]

Got one JUST like it....

Not sure of the year. It has that big sink on the output transistor like yours..but do NOT get the impression there is a lot of power ..MAYBE 1 watt continuous..

[radiotvnut]

Zenith "N" (1966) and "X" (1967) line AM/FM table radios had a handwired chassis with socketed transistors. However, I know of no known AM-only Zenith AC table radio with a metal chassis. I have an early (M-line, 1965) model Zenith AM solid state table radio and it's on a PC board. I will say that for a 4-transistor set, it performs well.

[dieseljeep]

Originally Posted by radiotvnut

Zenith "N" (1966) and "X" (1967) line AM/FM table radios had a handwired chassis with socketed transistors. However, I know of no known AM-only Zenith AC table radio with a metal chassis. I have an early (M-line, 1965) model Zenith AM solid state table radio and it's on a PC board. I will say that for a 4-transistor set, it performs well.

The one I have seems to receive and sound as well as an AA5. That high voltage output transistor is good for one watt.

[wa2ise]

As you can easily tell, it's a hot chassis design, with about 100V on the output transistor. The output transformer is likely very similar if not the same as that used in an AA5. The other transistors run off around 10V.

Circuit something like this:

[old_coot88]

Aha. So the output stage is the analog to a tube doubling as B+ dropper for the lower-voltage stages.