[Milsurplus] Need help with ART-13

[BOB]

John,
         Yes there is a relay actually mounted on the back side of the P.S. 
that is activated by the PPT. which sends HV to the set.
Bob
W1GTH


----- Original Message ----- 
From: "J. Forster" <jfor at quik.com>
To: "mac" <w7qho at aol.com>
Cc: "BOB" <hoopmonk at snet.net>; "milsurplus" <milsurplus at mailman.qth.net>
Sent: Tuesday, March 08, 2011 8:42 PM
Subject: Re: [Milsurplus] Need help with ART-13


> 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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>
>