[time-nuts] Re: The Collapse of Puerto Rico’s Iconic Telescope [April 5th, 2021 New Yorker]

[Lux, Jim]

On 3/30/21 6:40 AM, Wes wrote:
> Was a pity.  China's FAST is receive only.  I believe that leaves 
> Green Bank as the biggest transmitting telescope.

More likely the Goldstone Solar System Radar function of DSN on the 70m 
(DSS-14) - 500kW in X band at 8560 MHz

There *is* a new transmitter for GB - but it's a demo - 700 W and 
temporarily installed up at the feed for a test.  I don't know what 
frequency.  People are pitching a 500kW system, but we shall see.



>
> 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. Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  
>> Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Any body knows what happened to its Maser? Â  Â  
>> Â  Â  Â  Â  Â Bert Kehren
>> _______________________________________________
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