Topband: Heathkit SB-1000

Tom W8JI w8ji at w8ji.com
Thu Dec 17 08:31:00 EST 2015



> Good point Tom, beginning with too little drive would require more load C 
> than is available.  That and the brass washer should be installed also.
>

Hi Lou,

The anti-corona washer was not in the SB1000 or early AL80A. It should be 
added if a user might happen to mistune.

But I'd like to reiterate......the LAST thing to do is just start throwing 
padding capacitors in.  That tank will tune fine as designed unless it has a 
component or wiring problem, or unless the drive level is too low to match.

If it is being driven with 50 watts or more and does not tune into a 50 ohm 
load, I'd carefully inspect the entire tank circuit and wiring of the tank. 
This includes the switch (as Herb suggested).

Don't just go throwing parts in.

73 Tom
 



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