To: | [email protected] |
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Subject: | Re: LF: Better picture of the 807 based 500kHz TX |
From: | Dimitrios Tsifakis <[email protected]> |
Date: | Wed, 19 Dec 2012 08:07:25 +1100 |
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By the way, here is my current 40 m 807 transmitter.This was the first attempt at building a valve TX. people.physics.anu.edu.au/~dxt103/valves/807/ I will use the same type of chassis for the 472 kc version but I will use an old 450-0-450 (50 mA), transformer which also has a 225-0-225 and 6.3 windings, for a more compact result. My hope is that I can draw a bit more than 50 mA without overheating the transformer and is based on the fact that CW is not 100% duty cycle and also I am not using the other windings to their maximum current ratings. 73, Dimitris VK1SV |
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