[Boatanchors] Alex's Gorgeous 1938 Transmitter

[Alan Cohen]

I have to concur.  Alex's rig is what a single tube transmitter is 
supposed to be, unlike the crippled Ameco AC-1.  As reproductions go, 
this one looks excellent.  Of course, in 1938 they would not have used 
a pi-network output, but its use here is very justifiable.  Back then 
the output coil would have full B+ on it, with a link coupled output.  
Today, we favor unbalanced outputs with a much greater emphasis on 
safety.   Besides, in 1938 you could build with a transmitter with a 
pi-network output, it just was not very likely.

Great job!

Alan
WA2DZL
On Jan 20, 2005, at 10:46 AM, Freeberg, Scott (STP) wrote:

> Wow, what a gorgeous looking 1938 transmitter Alex!!!! I must be 
> having some kind of parallax type problem when I look at the two 
> photo's of the top and bottom.  The chassis appears much wider in the 
> bottom photo than the top photo, depth vs width.  Either its my eyes 
> (which it is), or you have discovered a way to make much more volume 
> inside the chassis than outside the chassis :))))))))
>
> Beautiful construction job.  Yes I agree, the glass 6L6 looks much 
> nicer to me than a metal sleeve 6L6, and the ST style 80 looks nicer 
> than a newer sleeve style 80.  Probably the most dramatic example of 
> tube beauty was when I fired up my Johnson Valiant 1 for the first 
> time and those 866 mercury vapor rectifiers were glowing bright blue.  
> Gorgeous.
>
> How much chirp to you experience. Noting that its a single stage your 
> loading likely has a mega effect on it.   Has the 6L6 been hard on 
> crystals?
>
> 73, Scott WA9WFA
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