[ARC5] BC-AS-230 Transmitter, part 1 - tube adapters, general clean-up, quest for a dummy load

[Brian]

Hello Ben,

8 Ohm is a standard E12 resistor, and so, readily available. Most 8 Ohm 10 W 
resistors are wire-wound. Therefore, they are quite inductive and quite 
unsuitable as an RF dummy load.
Resistors designed for Ward-Leonard motor control are claimed to be 
wire-wound, but with reversed turns to cancel out the inductance. But such a 
winding does not cancel out the inter-turn capacitance.
It would be wise to seek a ceramic resistor that bolts directly onto a 
heatsink - some look like a TO-220 case style, some are smaller. But often 
they are non-inductive. Ask for the specs.

73 de Brian, VK2GCE.

On Monday, December 22, 2014 9:48 AM , you said:
<snip>

I'm thinking that because the ARC-5 sets, the follow-on past the BC-230
series, were designed for a 5 to 15 ohm load I can't really go too far
wrong with an 8 ohm, 10 watt resistor.  Thoughts?

thanks much and 73,
ben, kd5byb