[Heathkit] Hot Water 101 Final Question

[Kenneth G. Gordon]

On 22 May 2008 at 18:18, William Aycock wrote:

> Fellow Heathkittens,
> I have a HW 101 and just replaced some bad 6146 finals with some
> 6146As from Sylvania.  With the 6146As, the plate current is all
> haywire.  When you place it in Tune, the plate current is about 90
> milliamps with no drive.  Key the mike and the plate current pegs the
> needle. Has anyone experienced anything like this?  The only thing
> that I can think of is that the 6146A is not a direct replacement for
> the 6146 although the Heathkit manual for the HW 101 said that either
> may be used.

Sounds to me like either your tubes have some/an internal 
short, or your metering resistors are all haywire.

I'm betting on the metering resistors. Every HW-101 I have 
restored in the last few years had bad ones.

Ken W7EKB