[ARC5] Visual alignment connections - bad detector tube?

[Kenneth G. Gordon]

On 24 May 2013 at 10:40, John Hutchins wrote:

> Kenneth -
> 
> I congratulate you on bird dogging this project.

Thanks, Hutch. :-)

My wife (and her mother) told me long ago that I was the most stubborn man 
they had ever met. I don't agree, but what do I know?

>  I admit I have not
> read all the postings on this issue,

There certainly have been a lot of them!

>  but the Tube diodes are good,
> right ?

I am beginning to seriously doubt it !!!! 

I am now wondering if there is a cathode to filament short or something 
similar, which would NOT effect the audio output, but would, most definitely, 
effect any scope display. SOMEthing is sure screwy....

After all, it dawned on me this morning that by yanking the detector tube, and 
connecting my RF probe to the same place the detector would have been 
connected and getting the correct display, that the RF probe is simply a 
detector with a built in LPF.

>  I am learning a point or two riding on your back.  What
> happens if you pull the tube then tack on a 1N34A in  place of the
> diodes? do you get the same bad response?

Funny you should suggest that, Hutch. That is exactly what I had thought I 
should do this morning.

I'll do that and will report back here afterwards.

Thanks! :-)

Ken W7EKB