[AMPS] SB-220: Operate/Standby Switch

[measures]

>In the May 1989 QST article http://www.arrl.org/tis/info/pdf/sstrans.pdf
>and a thread a few months back, a good modification to make (lets not
>debate the fact again, as it may not really be required, but I want to do
>it at any rate) is to add a standby/operate switch to keep the filaments on
>and hot, to the unit.  

The 3-500Z is instant-heat.  The problem with switching the 220 off and 
on is too much peak current for the on/off switch.  see Step-start 
circuit (Figure 1) on my Web site.  

> I would like to do this modification and lower the
>keying requirements at the same time, per the article, but I do not want to
>drill any holes in the front panel of the unit to mount the SPST switch.
>What are some ideas for adding a switch in a easy to use, inconspicuous
>place, that does not involve any permanent changes, i.e. drilling.
>
I agree that a totally unnecessary standby switch should be well hidden 
from public view.  

....

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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