[Elecraft] Using tube transmitter with K3/KX3/K2 as receiver?

Don Wilhelm w3fpr at embarqmail.com
Thu Oct 23 20:44:53 EDT 2014


Re: Heath TX1 power --
The Heath TX1 used a pair of 6146 output tubes, those normally run 180 
watts *input* power.
Modern transceivers (K3 included) are rated fort power output.
If one assumes a 67% efficiency (realistic) at 180 watts input, the 
output power will be 120 watts - that is about what one can get from a 
K3, although I do not recommend running the power knob to more than 100 
watts to keep IMD under control.

Sooo - I don't think the TX1 will "crank out a whole more power"  It 
seems to me to be about the same.

73,
Don W3FPR

On 10/23/2014 8:25 PM, david Moes wrote:
> Good question and answers here   I did the same as don suggested up 
> till recently.   I have  a Heathkit TX1.  I had no receiver until 
> recently when I got the RX1 to go with it.   bit of a crappy reciever 
> but its still a fun to do the nostalgia thing.    The TX1 will crank 
> out a whole lot more power on AM and CW than the K3 and it warms the 
> shack in the winter. Its not all DX and contests sometimes its fun to 
> get out the old and tinker.   next up is 1930 era two tube  push pull 
> UX-245 40m transmitter   now were talking chirp!.
>



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