[MRCA] ATC ART-13

[Michael Hanz]

Jeep has it right on.  In graphic terms, this is what the dynamic 
current plot looks like.  The nominal current is what is on the 
dynamotor name plate.

Documentation - Inrush Current | Loxone

On 5/30/2023 9:32 AM, Jeep Platt wrote:
> The DY-17 dynamotor requires more than 60A inrush current.  That 
> supply will not do the job unless you use a multi-farad inrush 
> booster. Just to check the autotune system and fil circuits, 10A will 
> do it.
> K3HVG
>
> Sent from my Verizon, Samsung Galaxy smartphone
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> ------------------------------------------------------------------------
> *From:* Herb Mooney <herbert.mooney at gmail.com>
> *Sent:* Tuesday, May 30, 2023 9:24:38 AM
> *To:* Jeep Platt <jeepcomms at outlook.com>
> *Cc:* mrca at mailman.qth.net <MRCA at mailman.qth.net>
> *Subject:* Re: [MRCA] ATC ART-13
> Would this A/C power supply work well enough for testing initial setup 
> prior to using my batteries with the dynamotor?
> https://www.amazon.com/gp/product/B00PWSDH8C/ref=ox_sc_act_title_2?smid=AMH4W1K8OCGMX&psc=1 
> <https://www.amazon.com/gp/product/B00PWSDH8C/ref=ox_sc_act_title_2?smid=AMH4W1K8OCGMX&psc=1>
>
> Herb - W4BCH
>
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>
>
> On Wed, May 17, 2023 at 10:52 AM Jeep Platt <jeepcomms at outlook.com> wrote:
>
>     I just sold an on the air ART-13 and ARR-15 receivers for $1k. The
>     ART-13 was complete and virtually new condition.  The ATC (Navy
>     designation) and the ART-13, both T-47s, are virtually the same. I
>     would shoot for the easiest one to get on the air.  I might also
>     recommend an a.c. power supply, to begin with. That will allow
>     sequential application of voltages; filaments first, the 400v,
>     then the 1100v HV.
>     Things to sequentially check:
>     All tubes light up.
>     Autotune works and properly "homes". ( no home, no TX key).
>     Apply 400v and check grid drive.
>     Finally, apply HV and check for power out.
>     If you need initial dial settings for test on 75 meters (can
>     provide).
>     You will need between 700 and 1100pf of loading to tune 75 meters
>     at 50 ohms.
>     Been there, done that, at least 8 times....  It can be done.
>     Jeep K3HVG
>
>     Sent from my Verizon, Samsung Galaxy smartphone
>     Get Outlook for Android <https://aka.ms/AAb9ysg>
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-- 
Michael Hanz - KC4TOS
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