Tim, et al.,
I must admit to being surprised a few weeks ago when a tremendous crack of
thunder awoke me from my usual stupor. Normally, in the months from late
March to November, all antennas are disconnected unless I am actually
operating. And even then the door is often opened and the sky scanned
carefully. The shack has no windows. Tim's feelings on this subject
closely parallel those of my own.
In my shack, in addition to that power master disconnect switch, there is a
one farad capacitor (with additional .01 across that). If you examine the
copper lined "cubby" where the 5000A resides, you will now find a
value-switched 80 dB attenuator "first in line" with RX2 thence to a six
position (I wish I had 12) selector switch to support all the sources I want
to play with. This is a recent addition. I guess I was just getting too
nervous about separation between my antennas. While I hate to say it, I do
believe it is unreasonable to expect these wonderful Flex radios to take
unlimited abuse.
That said, when I first got my "V/U upgraded" radio back from Texas I
accidentally sent full output from my D-700 into the 2M BNC connector.
After recovering full mobility when I realized what I'd done I could
scarcely control myself while I set up to test for damage. I couldn't find
any, once again a testament to the ruggedness of the 5000A, but after Gerald
expressed satisfaction with my good luck he commented that Flex couldn't
recommend that I repeat that!
If you don't know what is meant by "ground field" or "perimeter ground" I
strongly recommend you browse a bit and download at least one of the several
really good "How to protect" papers that are out there!
73
Lee K9WRU
----- Original Message -----
From: "Tim Ellison" <telli...@itsco.com>
To: "Chris" <ctsee...@cox.net>; <flexradio@flex-radio.biz>
Sent: Wednesday, March 02, 2011 7:27 AM
Subject: Re: [Flexradio] RX2 / HFRIO board
The TSB41AB2 is your 1394 (Firewire) physical controller IC and is not on
the HRFIO board. The PE4259 are RF switches.
My first guess would be that your issue is not transmitting 100 watts with
a beverage nearby, but it is possible. I would suspect an EMP from a near
lightning strike or a power surge from another source.
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