[Skimmertalk] WTB: QS1R

[Alexander Ranaldi]

I also have a Rev D which is still running well, but I made some "upgrades"
-- I placed large copper heat sinks on the voltage regulators with thermal
paste, and placed the QS1R board in a new enclosure with a home-built
self-contained linear power supply and a pair of 80mm fans for active
cooling.  I'm hoping to avoid heat related failures.

On Fri, Oct 26, 2018 at 9:31 PM N4ZR <n4zr at comcast.net> wrote:

> My Rev. D which is about 9 years old is still running fine.  A couple of
> years ago I mounted a 2" 5V muffin fan on top of it, and drilled two
> rows of holes in both sides just above the plane of the PC board.  So
> far so good...
>
> My Red Pitaya in the aluminum case was getting too hot for comfort.  It
> now has a 1" 5V fan mounted on the network/USB end of the top, sucking
> air in through the connector slots and around the case's inadequate heat
> sink. It is powered by the fan connector next to the Ethernet jack.
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
> On 10/26/2018 5:38 PM, Bill Straw via Skimmertalk wrote:
> > "Most QS1Rs eventually fail due to component failure related
> > to excessive heat"
> >
> > I dread that day. Setting up the QS1R to do CW and RTTY with
> > Skimmer server was very cookbook with the info on the RBN
> > site. The references provided are way past me, I would have
> > to hire someone to set it up
> >
> > Bill KO7SS
> >
> >
> >
> >
> >
> > ________________________________
> > From: "Bob Wilson, N6TV" <n6tv at arrl.net>
> > To: SkimmerTalk Reflector <skimmertalk at contesting.com>
> > Sent: Friday, October 26, 2018 2:21 PM
> > Subject: Re: [Skimmertalk] WTB: QS1R
> >
> >
> >
> > Hi Jeff,
> >
> > QS1Rs are pretty much unobtainable in working condition.  Most QS1Rs
> > eventually fail due to component failure related to excessive heat,
> > especially the voltage regulator.
> >
> > I'd highly recommend that you consider buying a Red Pitaya instead of
> > trying to find a working QS1R.  The Red Pitaya receiver performance is
> very
> > similar, it handles 8 bands at 192 kHz instead of only 7, it uses 1 Gbps
> > Ethernet instead of USB, it has two antenna inputs that can be assigned
> to
> > any of the 8 receiver slices, and it probably costs less (new) than a
> > working QS1R.  The only thing it doesn't do is work with CW Skimmer (the
> > older single-band version), but it works great with CW Skimmer *Server*,
> > RTTY Skimmer Server, and HDSDR (simultaneously) plus it can even be
> > reconfigured into a signal generator, an FT8 transceiver, a WSPR
> > transceiver, an oscilloscope, etc.
> >
> > Some references:
> >
> > http://pavel-demin.github.io/red-pitaya-notes/sdr-receiver-hpsdr/
> > http://hamsci.org/n6tv-red-pitaya-combine-cw-rtty-skimmer-hdsdr
> > https://groups.io/g/RBN-OPS/message/2190
> >
> > http://pavel-demin.github.io/red-pitaya-notes/sdr-transceiver-ft8/
> > http://pavel-demin.github.io/red-pitaya-notes/sdr-transceiver-wspr/
> >
> > 73,
> > Bob, N6TV
> >
> > On Fri, Oct 26, 2018 at 12:38 PM Jeff Blaine <KeepWalking188 at ac0c.com>
> > wrote:
> >
> >> Have a QS1R that needs a new home?
> >>
> >> If so, please contact me off list.  Thanks!
> >>
> >>> 73/jeff/ac0c
> >>> alpha-charlie-zero-charlie
> >>> www.ac0c.com
> >>>
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