There is a wire like that in the Hallicrafter s-40 series. Its purpose
is a small value capacitor. Instead of useing a real cap they just lay
or twist a small length of wire up to get the required capacitance.





On Sat, 26 Jan 2008 19:04:58 GMT, "Neil S"
wrote:

I have just started restoration of a Zenith "Universal" 6G601M [S/N T556876]
and have noted two odd things about the almost untouched chassis.

1. there is a sleeved wire coming from the grid of the 3Q5 output tube and
laying across the socket of the 117Z6 rectifier, but not connected at the
far end. According to the schematic and common sense, this wire serves no
purpose, but is clearly factory original. In photo see it coming from the
tag just behind the 2.2meg resistor and across the socket and ending over
the grey wire. Since the grid impedance is almost a megohm, one might think
it would pick up hum.

2. The orientation of the sockets for the 1LN4 IF and 1LH4 detector/1st
audio are substantially different than that shown in the Riders schematic
[Zenith Page 13-17] and the pin numbers are not shown on the schematic, only
the function callout on the socket voltage diagram. I have not noticed this
sort of error before.

Neil S.

On Mon, 28 Jan 2008 14:10:42 -0500, spasiba
wrote:

There is a wire like that in the Hallicrafter s-40 series. Its purpose
is a small value capacitor. Instead of useing a real cap they just lay
or twist a small length of wire up to get the required capacitance.


1. there is a sleeved wire coming from the grid of the 3Q5 output tube and
laying across the socket of the 117Z6 rectifier, but not connected at the

Yes these "gimmick" capacitors are used extensively in radios, but in
this case, why have this capacitance from the grid of the audio output
to the rectifier ?

Peter Dettmann