?I had mine at what I think is maximum output (-18 dbm) for 45 minutes feeding my scope without a probe and then I tee'd in a 50 ohm input frequency counter and that killed the AS179-92LF input switch. It took a few seconds, I was watching the scope and the signal decayed within 5 seconds of hooking up the counter.
Bob
On Wednesday, February 19, 2025 at 08:10:33 AM PST, Terry Perdue via groups.io <k8tp@...> wrote:
> ? That is why a DC Block is such an important part of your test kit. It is just a capacitor in series with the centre conductor in an SMA-M to SMA-F adaptor. > Make sure it has a DC rating of at least 100V, preferably 200V. Many of the units on Ebay, etc are only rated at ~20V DC isolation. > HTH Someone...Bob VK2ZRE
With a higher voltage coupling cap, isn’t damage still likely due to the voltage spike as it is connected to a >5V source? I’m sure Erik would have used a higher voltage cap if that weren’t the case.
