> On 10/13/2023 8:56 AM CDT Paul Koning via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
> 
> > On Oct 13, 2023, at 4:41 AM, Christian Corti via cctalk 
> > <cctalk@classiccmp.org> wrote:
> > 
> > ...
> > And the interesting part will be to build the DC power supply for the many 
> > voltages (-270V, -130V, -60V, +140V, +270V) and the heater supply.
> A good source for information on how to do that would be an older edition of 
> the ARRL Amateur Radio Handbook. Those can be found, from used book dealers. 
> I have a 1954 edition that would do well, though one from the 1960s is likely 
> also good (perhaps better since the earlier ones would have vacuum 
> rectifiers, which in a newly built supplly isn't optimal).
> 

Several from the 80s and earlier are available on archive.org:
https://archive.org/search?query=arrl+handbook&and%5B%5D=mediatype%3A%22texts%22

Will


If you want to build a ship, don't drum up people to collect wood and don't 
assign them tasks and work, but rather teach them to long for the endless 
immensity of the sea.

Antoine de Saint-Exupery

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