[Amps] Checking Filament Voltage

[Steve Wright]

On 21/02/17 04:10,  Roger Parsons <ve3zi at yahoo.com> wrote:
> The reason for wanting to do this is that the design of the (existing) cabinet (and my ideosyncratic circuitry) make it very difficult indeed to change filament voltage when all is assembled, except over a small adjustment range.

You need taps.  Did you didn't wind the filament transformer?  If you 
didn't, how will you control in anyway?  If you didn't, what's the point 
of the question, or at least, what are you going to do about it?

S