[Elecraft] KPA500 & Drake TR7

[Grant Youngman]

As an aside on the TR-7 (one of my all-time favorite radios), Drake generally limiting output power to about 120W (adjusted on 20M) to keep the PA healthy long term.  While the PA is capable of 150-200W output, it was certainly not recommended. 

As to cooling, there was an optional fan to cool the PA for modes with high duty cycle (RTTY, etc).

Grant NQ5T
K3 #2091 KX3 #8342

> On Jan 13, 2019, at 2:14 PM, ab2tc <ab2tc at arrl.net> wrote:
> 
> Hi again,
> 
> True, but the TR7 is all solid state, including the finals. See here:
> 
> http://www.wb4hfn.com/DRAKE/DrakeArticles/InsideTheTR7/Inside_The_TR7-01.htm
> 
> According to that article Drake claims 130-150W output for bands at above
> 20m and 60-100W on 80-15m.
> 
> Boy, is that transceiver ever jam-packed! Wonder how it does cooling-wise.
> 
> AB2TC - Knut
>