Is a Micamold type 800, always a capacitor? I think I know the answer, but I am confused. The three caps in question are of the type with 3 dots and an arrow. (Rectangular)
All the color codes are illegible.

The components in question are from a RC filter network. They are part of the power supply circuit in a zenith 1946 radio.

The "R" in the RC filter network, where there should be resistors, are missing.
Possibility some one has removed them.

Where I would expect to see resistors, are Micamold type 800 capacitors. They all do measure resistance and are burnt.

Can I just assume someone removed the resistors in the past and the Micamold's are now leaking?

Unfortunately the schematic is not helping, as it is not an exact match.

Were these micomolds of the past manufactured with RC values?

Some Zeniths used a resistor that has a body that looks exactly like a mica capacitor. I think this is often used around the rectifier circuit or sometimes as a dropping resistor for a pilot light. I seem to recall such a resistor in a 1940ish 6 tube series-wired Zenith.

Bob Rosengarten
Bellbrook Ohio

: Some Zeniths used a resistor that has a body that looks exactly like a mica capacitor. I think this is often used around the rectifier circuit or sometimes as a dropping resistor for a pilot light. I seem to recall such a resistor in a 1940ish 6 tube series-wired Zenith.

: Bob Rosengarten
: Bellbrook Ohio

The items in question are used in the
rectifier circuit as you have found in the past.
This leaves me now to strongly believe they
must be resistors and not caps.
Lets be thankful for standardization!

thanks
john

"Dear John" Micamold, CD, and centralab manufacured
plastic encased resistors that physically looked similar to mica caps. Most of these units
were indeed color coded. Over the past 50 years I can remember encountering them primarily in cathode bias circuits of RF amplifiers. Many of them also contained a
small bypass capacior so that bias and bypassing could
be accomplised with one unit. They did not give very
much trouble due to the low power and voltage.: Is a Micamold type 800, always a capacitor? I think I know the answer, but I am confused. The three caps in question are of the type with 3 dots and an arrow. (Rectangular)
: All the color codes are illegible.

: The components in question are from a RC filter network. They are part of the power supply circuit in a zenith 1946 radio.

: The "R" in the RC filter network, where there should be resistors, are missing.
: Possibility some one has removed them.

: Where I would expect to see resistors, are Micamold type 800 capacitors. They all do measure resistance and are burnt.

: Can I just assume someone removed the resistors in the past and the Micamold's are now leaking?

: Unfortunately the schematic is not helping, as it is not an exact match.

: Were these micomolds of the past manufactured with RC values?

: Is a Micamold type 800, always a capacitor? I think I know the answer, but I am confused. The three caps in question are of the type with 3 dots and an arrow. (Rectangular)
: All the color codes are illegible.

: The components in question are from a RC filter network. They are part of the power supply circuit in a zenith 1946 radio.

: The "R" in the RC filter network, where there should be resistors, are missing.
: Possibility some one has removed them.

: Where I would expect to see resistors, are Micamold type 800 capacitors. They all do measure resistance and are burnt.

: Can I just assume someone removed the resistors in the past and the Micamold's are now leaking?

: Unfortunately the schematic is not helping, as it is not an exact match.

: Were these micomolds of the past manufactured with RC values?

Hello, indeed they did make resistors that were molded into "mica"
capacitor cases. You can not tell them apart from a mica either.
They use 3 color dots (as do some micas. I see them all the time
in Zenith built auto radios of the late 40's.First, you mention
that it is out of a "1946 Zenith Radio" If you really want to solve
your mystery, get the model number of the radio, and then obtain a
"SAMS PHOTOFACT" or a "RIDERS DIAGRAM" (they have photos or drawings
of component placements)that will quickly ascertain what that component
is supposed to be, i.e; a resistor or a capacitor.
good day
Doc