If you have to replace it, consider getting a SAA2. I have several of them , including the one with metal case and N connectors. It feels robust and pleases (my) eye. They are available on Ebay for ?65, a similar price to the better ones based on the original nanovna architecture.
If you want one with even wider frequency coverage (up to 4ghz) and claimed more dynamic range, consider the V4, bit it is over ?100. Sometimes, the need expands to catch up or overtake the ability of one¡¯s test equipment.
Steve L.
