[Skimmertalk] WTB: QS1R

[N4ZR]

Sounds good.  I forgot that I also put heat sinks on the regulators. 
Over the years, it appears that U6 is underrated and is the cause of 
many Rev D failures.

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 10/27/2018 8:40 AM, Alexander Ranaldi wrote:
> 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 
> <mailto: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 <mailto:n6tv at arrl.net>>
>     > To: SkimmerTalk Reflector <skimmertalk at contesting.com
>     <mailto: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 <mailto: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 <http://www.ac0c.com>
>     >>>
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