[ARC5] Visual alignment of BC-454 - more photos

[Kenneth G. Gordon]

On 23 May 2013 at 14:54, Dennis Monticelli wrote:

> For a marker you could use a level triggered one-shot.  I think it is
> possible to wire up a single IC comparator to do this, If not a dual
> comparator should do the trick.  The sawtooth ramp would feed the
> comparator.

Wouldn't I feed the comparator with a signal from an independent signal 
generator, so I can "move" it back and forth across the passband?

>  For two independent markers a quad comparator could be
> used.

OK. Thanks. I'll dig some info out.

Ken W7EKB