I have a 1 M¦¸ permanently connected across the output of my transmatch.
When the feedline is disconnected from the transmatch (most of the time), I
have a 50 ¦¸ resistor paralleled with a 70 volt breakdown spark gap. Both
are 5-watt resistors.
Dave - W?LEV
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On Fri, Aug 13, 2021 at 8:04 PM Fred Moore <n40cla@...> wrote:
Just a quick question. How many ohms would you suggest for that bleeder?
Fred - N4CLA
On Fri, Aug 13, 2021 at 1:42 PM John Nightingale via groups.io <if455kc=
[email protected]> wrote:
As a matter of routine, consideration should be given to installing a
bleeder across the antenna's lead in the station to drain static
accumulation and never mind if it's a "grounded" antenna. A permanent
bleeder like that does not affect reception or transmission. For the
present purpose it would not affect v.n.a. observations. In urban areas
particularly, diode and gas discharge devices can cause problems; old
fashioned "R" is all that's required.
John
at radio station VE7AOV.
+++++
On 2021-08-13 8:27 a.m., Jim Lux wrote:
On 8/13/21 8:12 AM, David Eckhardt wrote:
When connecting any length of coax to any sensitive measurement
instrument,
I ALWAYS first grab the end of the coax and effectively short the end
with
a finger or hand. If there has been a recent lightning storm, you
might be
surprised and the discharge might surprise you in an undesirable
manner.
The cylindrical capacitor that makes up the coaxial cable can hold a
charge
for a very long time.
Blowing dust, snow, or rain, are even more of a charging hazard than
the field from a passing thunderstorm. Continuous charging. It
charges until something breaks down, so you get a buzz or continuous
clicking. A sort of relaxation oscillator.
--
*Dave - W?LEV*
*Just Let Darwin Work*
