[Amps] 4CX250 IMD

[Steve Thompson]

jeremy-ca wrote:

> In any case the -23/27 is what Ive experienced with that tube at 2KV in 
> a 2M amp before building the 3CX1000A7 and the generic 250 is a bit 
> worse. This was in the dark days and I used VR tubes for screen 
> regulation.

Looking at GW4FRX's measurements, I wonder if the IMD you measured owed 
more to the screen supply than to the tubes themselves?

  The old
> xvtr was replaced about 15 years ago by a MM unit from your side of the 
> pond that I improved the RX a bit.
Was that the new version or the older one in the diecast box?

Steve