Date: Tue, 12 Oct 2010 21:53:12

Author: Zani, Gerald

Subject: Re: Cenco Transmitter

Post:

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Jerry

Don't suspect the tubes yet, especially if they glow.

If your lucky, your better off testing that the wave-meter detection is bad
and the homemade aluminum pick antenna is bad, too?

Try detecting the transmitted signal without them. Use an ohmmeter to
detect the transmitted signal. To do so plug ~1 meter long test leads into
your ohmmeter, place it near the transmitter antennas beong sure that the
wires are polarized in a direction parallel to the antennas and then turn on
the transmitter and turn on the ohmmeter.

With luck, you'll sense something. - Jerry

On Tue, Oct 12, 2010 at 8:04 PM, Jerry Hester wrote:

> Taplers,
>
> In cleaning out some storage space, I dug out a Cenco transmitter just
> like: JZ's
> http://www.physics.brown.edu/physics/demopages/demo/em/demo/5n1060.htm
> Plus a Cenco Wavemeter #89442.
> Problem is as best I can tell the transmitter is not in working order.
> Both tubes: CRC 801A light up but when I place a pencil lead near the
> terminals of the inductor, I see no sparks.
> When I bring the wavemeter near and I tune through its frequency
> adjustment, no joy.
> I built an antenna with two pieces of Al tubing each 97cm long and
> connected with a flashlight bulb but still no joy.
>
> My suspicion is the tubes are bad even though they do light up.
> Can any of you Gurus shed light on the project?
> Have any of you in recent times managed to find new tubes?
>
> Thanks,
> Jerry H.
>
>

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JerryDon't suspect the tubes yet, especially if the=
y glow.If your lucky, your better off testing tha=
t the wave-meter detection is bad and the homemade aluminum pick antenna is=
bad, too?
Try detecting the transmitted signal without them. =A0U=
se an ohmmeter to detect the transmitted signal. =A0To do so plug ~1 meter =
long test leads into your ohmmeter, place it near the transmitter=A0antenna=
s beong sure that the wires are polarized in a direction parallel to the an=
tennas and then turn on the transmitter and turn on the ohmmeter.
With luck, you'll sense something. =A0- JerryOn Tue, Oct 12, 2010 at 8:04 PM, Jerry Hester =
edu> wrote:
Taplers,

In cleaning out some storage space, I dug out a Cenco transmitter just like=
: JZ's http://www.physics.brown.edu/physics/d=
emopages/demo/em/demo/5n1060.htm

Plus a Cenco Wavemeter #89442.
Problem is as best I can tell the transmitter is not in working order.
Both tubes: CRC 801A light up but when I place a pencil lead near the termi=
nals of the inductor, I see no sparks.
When I bring the wavemeter near and I tune through its frequency adjustment=
, no joy.
I built an antenna with two pieces of Al tubing each 97cm long and connecte=
d with a flashlight bulb but still no joy.

My suspicion is the tubes are bad even though they do light up.
Can any of you Gurus shed light on the project?
Have any of you in recent times managed to find new tubes?

Thanks,
Jerry H.



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