SDR Console and RX-888 MKII #sdr-consolev3
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vince battle
From: Dirk
Sent: Thursday, August 18, 2022 4:15 AM To: main@SDR-Radio.groups.io Subject: Re: [SDR-Radio] SDR Console and RX-888 MKII #sdr-consolev3
I have the RX-888 MKII but really no closing answer.
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Paul
Mine is used exclusively on VHF between 30-70MHz, usually for FM reception and it performs very well equalling the performance of my AS R2 and RSP1A with much greater bandwidth, normally running at 35MHz width from the top end of 10M. I've compared it on HF to my Elad S3 and yes the S3 had the edge on very weak signal working (and decoding) but was it £800 better performance? Most definitely not!
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Simon,
thank you for your very good information! I know that you are busy on that despite of the heat ... |
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Dirk,
I think the firmware does correctly support the firmware, busy today / tomorrow.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Dirk via groups.io <dottensm@...>
Sent: 18 August 2022 12:12 To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Subject: Re: [SDR-Radio] SDR Console and RX-888 MKII #sdr-consolev3 Simon and group,I have the RX-888 MKII but really no closing answer. I suppose, that the actual drivers (ExitIO and other solutions) are not supporting this device with all hardware options. In the HF path there is an programmable attenuator and a VGA (also programmable). In the VHF path there is also the VGA and the R828D tuner with its own gain adjustment options. In the moment I think, the attenuator (PE4312) and VGA (AD8370) are not programmed with the actual drivers and are set to their default power-up values: VGA at min. gain, attenuator at max. attenuation. If that is true, then the RX-888 MKII is actually running with put on handbrake. -- - + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems. |
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Simon and group,I have the RX-888 MKII but really no closing answer. I suppose, that the actual drivers (ExitIO and other solutions) are not supporting this device with all hardware options. In the HF path there is an programmable attenuator and a VGA (also programmable). In the VHF path there is also the VGA and the R828D tuner with its own gain adjustment options. In the moment I think, the attenuator (PE4312) and VGA (AD8370) are not programmed with the actual drivers and are set to their default power-up values: VGA at min. gain, attenuator at max. attenuation. If that is true, then the RX-888 MKII is actually running with put on handbrake. |
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vince battle
Simon and group,
what is the consensus of the RX-888 MKII from a receiving perspective compared to other SDR's? Vincent |
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Siegfried Jackstien
.... outsize (at midday) 30°C or more
a blower in the window frame of a cellar window brings in air from north side of the house (no sun so a bit cooler)
i open the door to the cellar in my entrance and a cool 18 degree breeze comes out (yes its cool down there .. grin)
a blower that stands in the entrance blows that cool breeze into sleeping room and from there to the living room/shack sleeping room is at 21 and shack at 22 to 23 degrees call it a cheap air condition system ;-) dg9bfc sigi
Am 16.08.2022 um 05:57 schrieb jdow:
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jdow
I'd hang it from that nice large beefy USB connector if I were to hang it by one end or the other. Get yourself an IR thermometer. Aim the "gun" at the RX999 model
and measure the temperature. 70C is where I might start getting
concerned. And that is a very uncomfortable temperature in your
hand after a couple seconds. {^_^} On 20220815 11:28:14, N2MS wrote:
Are your SMA connectors facing up or down in the vertical position? I am thinking of placing it SMA connector down and removing the plate on the USB connector side. Mike N2MSOn 08/15/2022 2:28 AM jdow <jdow@...> wrote: A small computer fan cools the MKII admirably. Mounting it with the fins vertical also helps. Alas, that is a little stressful for the SMA connectors. {^_^} |
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jdow
It takes remarkably little breeze to create enough to get the initial 5C or cooling. Since the efficacy is related to temperature delta the next 5C is harder, and each one after that is harder yet. When you get down into 10C above ambient getting to 5C above ambient may require some form of refrigeration. {^_-} On 20220815 07:40:40, Dirk wrote:
On Mon, Aug 15, 2022 at 10:31 AM, jdow wrote: |
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jdow
For personal cooling at the moment I am using a pair of roughly 5" fans aimed at me and running on 5 volts. It's a gentle breeze that helps enough I'm not dying of heat and not getting dry eyes from a stiff fan breeze in my face. I may need to go to 12 volts with the fans in series to raise the voltage to 6v. I experiment a lot. {^_-} On 20220815 03:33:13, Simon Brown
wrote:
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Ken Sejkora
I tend to agree with Joann. If cooling is an issue, mounting the receiver in a ‘vertical’ orientation with the SMA connectors upward and USB connector downward would help promote natural convective cooling through the heat sink fins on the ‘bottom’ of the receiver. Thinking inside the box (literally, and laterally), even better might be to borrow the concept from high-power ham radio linear amplifiers and shroud the vertically-oriented receiver in a small enclosure, or “chimney”, and force cooling air from the bottom upward. Even a very small CPU cooling fan ducted in such a manner would more than suffice in a ducted application. If the receiver, and cooling fan, are running 24/7, dust buildup on the fan blades, and/or heat sink fins, might arise and merit a periodic ‘cleaning’ regimen to remove any accumulated dust.
Another consideration -- A fan using an old-style brush-contact motor could potentially generate spark-type RFI. Fortunately, brush motors are a thing of the past. Conversely, newer brushless motors could potentially employ a switching circuit, also conducive to RFI. Your mileage (or kilomerterage) may vary.
Good luck.
Ken -- WBØOCV
> On 08/15/2022 2:28 AM jdow <jdow@...> wrote: > > > A small computer fan cools the MKII admirably. Mounting it with the fins vertical also helps. Alas, that is a little stressful for the SMA connectors. > {^_^} >
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N2MS
Are your SMA connectors facing up or down in the vertical position?
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I am thinking of placing it SMA connector down and removing the plate on the USB connector side. Mike N2MS On 08/15/2022 2:28 AM jdow <jdow@...> wrote: |
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Yes,
Those small fans are good, I use them on my NUC computers and SDRs.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Dirk via groups.io <dottensm@...>
Sent: 15 August 2022 15:40 To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Subject: Re: [SDR-Radio] SDR Console and RX-888 MKII #sdr-consolev3 On Mon, Aug 15, 2022 at 10:31 AM, jdow wrote:
You be kidding? At the moment it is hanging above my desk with the antenna connector adapter chain resting on the top of my blood pressure monitor and the other is laying across my desk upon which the BP monitor stands. I make DAMNED sure I don't push down on it.Ok, ok! I'll never ask again. ;-) Now I have a temporary solution with my 130mm fan and I will order this one later: ELUTENG 2 in 1 5V Lüfter USB Fan 40mm 3 Geschwindigkeiten 5500 rpm Klein Lüfter Starker Wind Ventilator Leise Mini PC Kühlung Lüfter Kompatibel für PS4/Laptop/TV Box/AV Schrank/Router : Amazon.de: Computer & Zubehör -- - + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems. |
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On Mon, Aug 15, 2022 at 10:31 AM, jdow wrote:
You be kidding? At the moment it is hanging above my desk with the antenna connector adapter chain resting on the top of my blood pressure monitor and the other is laying across my desk upon which the BP monitor stands. I make DAMNED sure I don't push down on it.Ok, ok! I'll never ask again. ;-) Now I have a temporary solution with my 130mm fan and I will order this one later: ELUTENG 2 in 1 5V Lüfter USB Fan 40mm 3 Geschwindigkeiten 5500 rpm Klein Lüfter Starker Wind Ventilator Leise Mini PC Kühlung Lüfter Kompatibel für PS4/Laptop/TV Box/AV Schrank/Router : Amazon.de: Computer & Zubehör |
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All,
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I keep a 12 volt fan on my RX888 MKII’s running 16 MHz BW, 15 to 31 MHz 24/7 monitoring solar flares and Jupiter storms. Run Console3 data stream into an SDRc2RSS interface program to Radio Sky Spectrograph version 2.9.63. Important to have a short high quality USB cable directly into rear USB port on WIN10 computer. Works fine on WIN11 also. All thanks to Simon’s excellent software. Thanks. On Aug 15, 2022, at 2:26 AM, jdow <jdow@...> wrote:
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Paul
I don't know about needing 64MHz bandwidth but mine runs at 35Mhz BW for much of the Sporadic E season and the heat is taken care of with a small PC fan stuck to the heatsink.
Using SDR Sharp I set the extIO to 140MHz sample rate and reduce the bandwidth down from 70MHz to 35MHz so I can monitor all low VHF up to 70.00MHz @ 16bit on the HF port. Paul |
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This is what I use:
Both recommended.
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of jdow via groups.io <jdow@...>
Sent: 15 August 2022 09:31 To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Subject: Re: [SDR-Radio] SDR Console and RX-888 MKII #sdr-consolev3 You be kidding? At the moment it is hanging above my desk with the antenna connector adapter chain resting on the top of my blood pressure monitor and the other is laying across my desk upon which the BP monitor stands. I make DAMNED sure I don't push down on it. It gets warm but not what I'd call fatally warm. Around here our "AudioBox" machines cycle through after (masked) beats them to heck with theme park ride levels of shock and random power cycling. They get hot. A small 3" or 4" fan lying on top of the boxes drops temperatures enough. I figure a 2" fan or two on top of the MKII would do the same if you lose the cooling surface on the bottom that I have because it's floating between connectors. {^_^} On 20220815 00:52:22, Dirk wrote:
A small computer fan cools the MKII admirably. Mounting it with the fins vertical also helps. Alas, that is a little stressful for the SMA connectors.Ok. Do you have photos how you made it? -- - + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems. |
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jdow
You be kidding? At the moment it is hanging above my desk with the antenna connector adapter chain resting on the top of my blood pressure monitor and the other is laying across my desk upon which the BP monitor stands. I make DAMNED sure I don't push down on it. It gets warm but not what I'd call fatally warm. Around here our "AudioBox" machines cycle through after (masked) beats them to heck with theme park ride levels of shock and random power cycling. They get hot. A small 3" or 4" fan lying on top of the boxes drops temperatures enough. I figure a 2" fan or two on top of the MKII would do the same if you lose the cooling surface on the bottom that I have because it's floating between connectors. {^_^} On 20220815 00:52:22, Dirk wrote:
A small computer fan cools the MKII admirably. Mounting it with the fins vertical also helps. Alas, that is a little stressful for the SMA connectors.Ok. Do you have photos how you made it? |
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A small computer fan cools the MKII admirably. Mounting it with the fins vertical also helps. Alas, that is a little stressful for the SMA connectors.Ok. Do you have photos how you made it? |
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jdow
A small computer fan cools the MKII admirably. Mounting it with the fins vertical also helps. Alas, that is a little stressful for the SMA connectors. {^_^} On 20220814 08:17:07, Dirk wrote:
Yes, it's hot enough outside. Don't want to kill my SDR ... 😊 |
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