[Milsurplus] Need help with ART-13

[J. Forster]

If this is the discussion I think it is, the delay tube was to allow the
filaments to heat up. The HV pimaries were driven directly from the delay
tube and its contacts kept failing. I think Bob is adding a contactor in
the delay tube circuit.

I don't think the HV is controlled by the PTT, but I could be wrong. Doing
that w3ould require an additional, low power relay.

FWIW,

-John

================



> Bob,
>
> Not quite sure why a delay would be required/desirable here.  Are you
> running HV into the set continuously instead of only on PTT (like the
> dynamotor does)?
>
> Dennis D. W7QHO
> Glendale, CA
>
> ***********
>
> On Mar 8, 2011, at 4:28 PM, BOB wrote:
>
>>    I run a time delay from the 115V input to kick in the 400 and 1200
>> volt primary's on my P.S. The 28 volt supply comes on when the main
>> switch
>> is turned on. The orginal design had the delay tube turning on the
>> primary's
>> but I found that to be a problem. I am about to install a contactor
>> activated by the delay to do the heavy lifting. Should work out much
>> better
>> Good luck
>> There is a Yahoo Art-13 site that is great for this kind of info.
>
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