Read
http://www.lz1aq.signacor.com/docs/Wide_Mag_loop_prot_v1/wideband_mag_loop_protection.htm
and look at Fig.5 and 6 diagrams. This is the
electric field intensity during nearby lightning strike – up to 50KV
[1/m] .
The voltage stress at the input capacitor is
extremely high.
ou the
> capacitor has failed. Lack of performance/directivity or noise. Noise might
> indicate oscillation.
> Lee K7TJR
> Hi-Z Antennas
>
>
>
> -Original Message-
> From: Topband On Behalf Of VE6WZ_Steve
> Sent: Tuesday, September 24, 2019 11:09 AM
&g
I am convinced that there should be a static drain resistor. But since I
don't know anything about this antenna, I cannot suggest a value.
If I owned one, I might even add a GDT (and/or a low-capacitance TVS diode)
in parallel with the resistor, to help prevent damage from close lightning
teve
> Sent: Tuesday, September 24, 2019 11:09 AM
> To: topband
> Subject: Topband: YCCC 9 circle preamp failure test
>
> Yesterday I decided to measure the actual voltage at base of my short HI-Z
> verticals while I transmitted on the TX array.
>
> Since I first posted about t
Can't you install a static drain resistor to keep that voltage from
building up so high?
73, Mike
www.w0btu.com
On Tue, Sep 24, 2019, 2:09 PM Lee STRAHAN wrote:
> Hi Guys,
> Assuming your verticals have a very good insulator there is NOTHING to
> stop that input capacitor from charging to
, 2019 11:09 AM
To: topband
Subject: Topband: YCCC 9 circle preamp failure test
Yesterday I decided to measure the actual voltage at base of my short HI-Z
verticals while I transmitted on the TX array.
Since I first posted about the coupling capacitor failures in these units, I
have received
Yesterday I decided to measure the actual voltage at base of my short HI-Z
verticals while I transmitted on the TX array.
Since I first posted about the coupling capacitor failures in these units, I
have received private emails form 4 others with the same problem.
My question is what has
