Fun with Omnitronix

AM Radio discussion. Directional arrays are FUN!
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ChuckG
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Fun with Omnitronix

Post by ChuckG » Thu Jul 21, 2016 5:45 pm

So the Omnitronix 1kW AM I maintain has started something new.
Normally when lightning is nearby the transmitter mutes the RF and waits for someone to dial in and reset it. The power supplies all stay up.
Last 2 days resetting it cycles the 300V supply as usual, but the RF stays muted. We've had to go out there and turn off the main breaker. The transmitter then comes back normally when power is restored.

I've stared at the drawings for the control card and can't make any sense of the protection circuits. I think the drawings don't match what's actually built. For example: It's supposed to automatically recycle three times, but it has never done that, nor is the counter circuit even present. Anyway...

The (very) few of you that have had the joy of maintaining an Omni, how do the overload circuits on yours behave during VSWR events? Any need to cycle the main breaker?

The box is too heavy to launch in my clay pigeon launcher so I have to keep it running for now. Thanks!
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Chuck Gennaro
Central Wisconsin

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RGORJANCE
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Re: The box is too heavy to launch

Post by RGORJANCE » Thu Jul 21, 2016 8:15 pm

Have you tried a trebuchet??? Some of them can toss about a ton. So, as far North as you are, there ought to be some moats you could target.

Anyway, I'll check with my learned sources to see if they got some ideas. I'll contact them in the morning.

Fossil

ChuckG
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Re: The box is too heavy to launch

Post by ChuckG » Thu Jul 21, 2016 8:19 pm

RGORJANCE wrote:Have you tried a trebuchet???


Excellent Idea. Pull! :lol:
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Chuck Gennaro
Central Wisconsin

BigRed
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Re: Fun with Omnitronix

Post by BigRed » Thu Jul 21, 2016 11:28 pm

Trebuchet ? ? ? ? Pfffffttt! That's soooo last century.

These guys seem to have the rigging that you need to make it "sporting".

https://www.youtube.com/watch?v=b3npF3e2oZQ :D

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KPJL FM
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Re: Fun with Omnitronix

Post by KPJL FM » Mon Jul 25, 2016 9:00 am

Take it to the Pumpkin Chunkin contest this fall. https://www.punkinchunkin.com/
Trim to fit, paint to match, tune for minimum smoke.

ChuckG
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Re: Fun with Omnitronix

Post by ChuckG » Mon Jul 25, 2016 6:38 pm

And it's "dried out capacitors in the control card" for the win. :lol:
I"m just going to shotgun the whole transmitter, they're all the same age.
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Chuck Gennaro
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Deep Thought
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Re: Fun with Omnitronix

Post by Deep Thought » Mon Jul 25, 2016 10:14 pm

Taking a shotgun to that transmitter is probably the best idea.
Mark Mueller • Mueller Broadcast Design • La Grange, IL • http://www.muellerbroadcastdesign.com

Kent T
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Re: Fun with Omnitronix

Post by Kent T » Fri Aug 04, 2017 2:21 pm

Deep Thought wrote:
Mon Jul 25, 2016 10:14 pm
Taking a shotgun to that transmitter is probably the best idea.
I have a better idea. How about .50 BMG aimed right, and do the job right! Or Uzi therapy!

Kent T
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Re: The box is too heavy to launch

Post by Kent T » Fri Aug 04, 2017 2:26 pm

ChuckG wrote:
Thu Jul 21, 2016 8:19 pm
RGORJANCE wrote:Have you tried a trebuchet???


Excellent Idea. Pull! :lol:
The more elaborate the Trebuchet, the better the Trebuchet! Pull! Indeed. And Pull! some more. POS transmitter and broadcast equipment Trebuchet Party, my idea of a fun weekend with lots of liquid refreshment, Trebuchets, and engineer fun!

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RGORJANCE
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Re: Fun with Omnitronix

Post by RGORJANCE » Sat Aug 05, 2017 7:45 am

Chuck:

The one they stuck me with is really docile, quiet and very well behaved. It's so good sitting there, never gives me any trouble. It is a backup, and the boss said that the fan noise was so annoying that he turned the circuit breaker on the front panel off.

And we don't have to feed it. Shows a lot of confidence in the main BE AM1!

Fossil

PS - I like the idea of a junk chunkin contest----we could sell raffle tickets based on just how close to the target you can guess the impact point will be. Beer is good idea too.

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