Was a pity. China's FAST is receive only. I believe that leaves Green Bank as
the biggest transmitting telescope.
I remember 417s. I had them in a copy of a design by W2AZL. I also had a
two-meter preamp I designed using 416Bs. Of course uW cooled preamps are not
unusual now, but back then a blower on a receive amplifier was unusual :-)
Wes Stewart N7WS
On 3/30/2021 4:06 AM, ew via time-nuts wrote:
GOOD Morning Tom
Thank you for the super information Read it over and over. To me no joy,
sadness for Astronomy, Science, Puerto Rico and the US. China is now the leader
with a 500 meter unit! Did follow it since the seventies because of the low
noise receivers. Remember the 417 Triodes? I had some for Ham use.
Any body knows what
happened to its Maser?
Bert Kehren
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