On Sat, Jun 28, 2025 at 01:11 PM, Gareth Evans wrote:
  There's a subsidiary consideration there, and that is that older gear, whetherPurchase two VNA's then, they are cheap enough.
test eqpt or rigs, if made from individual components then it is repairable.
But when a transistor smaller than the tip of a pin inside the VNA's chips
fails then it's a dustbin job.
And no,I am not being facetious.
  When you can get a VNA for a lousy $50, or an a decent Chinesium HT
  for $20 delivered then who cares about the cost.
  In todays world thats a few coffees at Starbucks or a Happy Burger
  and fries from a well known outlet.
  If I'm calibrating a rig for WSPR use then I ain't gonna be wasting my 
  time using an old BC221. Not worth the effort unless you're running
  an engineering technology museum or using it as a prop to teach
  engineering students how much we have progressed.
  @ndy
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