[R-390] Re: My R390A

[Robert M. Bratcher Jr.]

At 05:14 AM 12/30/01 +1000, you wrote:
>Hello Ken and group -
>
>Thought I'd toss in a bit more about the KW-1 and Johnson Desk KW:
>
>6' tall, 675 lbs. Runs a pair of 4-250s(can be swapped with 4-400s) modulated
>by a pair of 810s.


I wonder if the 4-400's give a little more power out.

1KW input. Wonder what the output was? Something between 700 & 800w?

>150 production models and two prototypes(both of which still
>existed last I knew). New price in 1952 was $3850. They started out as a
>CW/AM/NBFM transmitter, but apparently sold only as CW/AM(although Collins
>later offered a factory modification to the RF deck allowing it to be used 
>as a
>linear amplifier). ER put out an interesting KW-1 issue some years back, 
>with a
>very interesting story in it about the development of this transmitter and how
>one was rushed to Art's house for a contest and the fellows finished
>building/assembling it there for a weekend contest. Indeed a sight to behold,
>built at least to broadcast industry-standards, a lot of extra shielding for
>TVI, including feedthrough caps for any wires passing through the RF deck to
>the outside and a hefty lowpass filter for the feedline. As their ads state,
>the KW-1 'tunes as easily as the 32V transmitter'.


I've got a KWS-1 here. Always wanted a KW-1. Never saw one offered for 
sale. Perhaps I should try Ebay?