[Skimmertalk] RU9CZD skimmer QS1R died in the recent thunderstorm. Help needed.
Pete Smith N4ZR
pete.n4zr at gmail.com
Wed Sep 15 16:08:25 EDT 2021
I was amused by the description of "U1" as an EMI Filter. I'd betcha it
is a Mini-circuits 1:1 transformer, in which case the circuit is
identical to the Array Solutions design except for the two strings of
diodes. Either that, or just a box of snake-oil.
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use your favorite
"retail" DX cluster.
On 9/15/2021 3:36 PM, Jeffrey Maass wrote:
>
> At PJ2T, we’ve standardized on the DX Engineering HD-5000HD receiver
> protection devices.
>
> Here is a link to an article done by Jim W8WTS, comparing the old DEO
> RG-2000U device sold by Universal Radio and the DXE RG-5000 device
> (slightly older design than the current HD-5000HD. Both are still
> available.)
>
> http://www.k8nd.com/Radio/CW_Skimmer/W8WTS_Comparison_RG-2000_RG-5000.pd
> <http://www.k8nd.com/Radio/CW_Skimmer/W8WTS_Comparison_RG-2000_RG-5000.pdf>
>
> 73, Jeff K8ND
>
> *From:*Skimmertalk
> [mailto:skimmertalk-bounces+jmaass=k8nd.com at contesting.com] *On Behalf
> Of *Pete Smith N4ZR
> *Sent:* Wednesday, September 15, 2021 2:58 PM
> *To:* skimmertalk at contesting.com
> *Subject:* Re: [Skimmertalk] RU9CZD skimmer QS1R died in the recent
> thunderstorm. Help needed.
>
> Another option would be a receiver protector like the AS-RXFEP from
> Array Solutions. It uses a gas tube across the input to ground, a
> high voltage blocking capacitor on the input, and a 1:1 transformer.
> The company claims it will limit signals to 0.3 volts PEP and protect
> against nearby lightning.
>
> 73, Pete N4ZR
> Check out the new Reverse Beacon Network
> web server at<http://beta.reversebeacon.net> <http://beta.reversebeacon.net>.
> For spots, please use your favorite
> "retail" DX cluster.
>
> On 9/15/2021 1:04 PM, Igor Sokolov wrote:
>
> Thanks to all who helped us. Indeed only USB chip was damaged. It
> was replaced and QS1R is working now. We are looking for a new
> location for RU9CZD skimmer. It will probably be some rural place
> with less man made noise. In order to protect the receiver from
> static in the future we plan to put a cathode follower between the
> antenna and QS1R. Does anybody have experience using this type of
> protection? Do you think it is a good idea?
>
> 73, Igor UA9CDC
>
>
> 13.08.2021 17:35, Prasad VU2PTT пишет:
>
> Igor,
>
> I had lost the USB chip in the QS1R here from a very nearby
> lightning strike some time back. Replacing it worked - nothing
> else was affected on the board. Lost many other things too but
> the QS1R had only this part damaged.
>
> Good luck!
>
> 73,
>
> Prasad VU2PTT.
>
> On Fri, 13 Aug 2021 at 6:58 AM, Igor Sokolov <ua9cdc at gmail.com
> <mailto:ua9cdc at gmail.com> <mailto:ua9cdc at gmail.com>
> <mailto:ua9cdc at gmail.com>> wrote:
>
> Thank you guys. Visual inspection did no reveal any
> damage. The radio
> does not respond when connected to computer USB. That is
> why we
> thought
> may be only USB was affected. IF the USB chip CY7C6813A
> does not
> require
> firmware we will try to substitute it first.
>
> 13.08.2021 0:01, Pete Smith N4ZR пишет:
> >
> > Amen. I thought mine had a USB transceiver problem, but
> when I
> looked
> > more closely, the ADC chip - still a $105 part - showed
> severe
> burning
> > and bubbling on its top surface. Since there is very
> little
> between
> > the antenna input and the ADC, it's not hard to imagine
> lightning damage.
> >
> > 73, Pete N4ZR
> > Check out the new Reverse Beacon Network
> > web server at<http://beta.reversebeacon.net
> <http://beta.reversebeacon.net>
> <http://beta.reversebeacon.net> <http://beta.reversebeacon.net>>.
> > For spots, please use your favorite
> > "retail" DX cluster.
> > On 8/12/2021 2:50 PM, Bob Wilson, N6TV wrote:
> >> That is the USB transceiver chip, so I imagine it does
> not need
> any
> >> firmware installed.
> >>
> >> But if there was lightning nearby while the antenna was
> connected,
> >> many more chips could be damaged.
> >>
> >> 73,
> >> Bob, N6TV
> >>
> >>
> >> On Thu, Aug 12, 2021 at 11:20 AM Igor Sokolov
> <ua9cdc at gmail.com <mailto:ua9cdc at gmail.com>
> <mailto:ua9cdc at gmail.com> <mailto:ua9cdc at gmail.com>
> >> <mailto:ua9cdc at gmail.com <mailto:ua9cdc at gmail.com>
> <mailto:ua9cdc at gmail.com> <mailto:ua9cdc at gmail.com>>> wrote:
> >>
> >> RU9CZD skimmer is off line as our trusted QS1R that
> have been
> >> serving us
> >> for many years went out of order during recent
> thunderstorm. We
> >> would
> >> like to try and fix it. The suspect is CY7C6813A.
> This chip is
> >> available
> >> locally but the question is, does it need some sort
> of firmware
> >> installed prior to soldering it in. Is this firmware
> available from
> >> somewhere? Help would be highly appreciated.
> >>
> >>
> >> 73, Igor UA9CDC
> >>
> >> _______________________________________________
>
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