The GDT's fire up around 100v, so any diode protection may have some work to do.
Series resistance may help, Raj's original back-to-back diode suggestion included a small incandescent lamp.
The idea was originally from Raj: ?
/g/BITX20/message/19105His incandescent bulb increases it's resistance drastically when it heats up, so is worth considering in addition to the diodes.
/g/BITX20/message/21901Jerry, KE7ER
On Tue, Dec 26, 2017 at 11:02 am, Gordon Gibby wrote:
QST suggested gas discharge tubes across the antenna lead -- which only work provided the fidelity of the transmission line system is NOT good into the Gigahertz (exceeding the turnon timing of the gas discharge tube)?....but then most ham ssystems are lossy there and slow down the incident waveform enough to give the gas discharge aa chance....then the diode protection and shottky protection have the possibillities of protecting the rig.....
?
