Date   

Re: RX666 and RX888 as VHF receivers

N2MS
 

Now that SDRC supports it would like to experiment with the RX-888.

Could anyone recommend a reliable supplier?

Mike B2NS

With the RX-888 I'm buying a lot of capability I don't need, and I've seen
other hardware which promised a lot but was very poorly supported and rather
unreliable (Lime).

But I will be very interested to hear how you get on....


Re: RX666 and RX888 as VHF receivers

Max
 

Simon's screenshot here shows (I think I can just make it out) HF and VHF gain adjustment/slider? So hopefully has VHF coverage?

https://forum.sdr-radio.com:4499/viewtopic.php?f=57&t=159

I wish we would all settle on the Forum instead of hopping back and forward between IO and new Forum! It's getting time consuming and tiresome. Maybe time to close the IO Group?

Anyone?

Max


On Sat, Sep 5, 2020 at 11:09 AM, Alan wrote:
dose that leave the RX-888??? Fully compatible?

I'd guess that the VHF section will not be available?

73 Alan G4ZFQ


Re: RX666/888 on VLF?

Max
 

Thank you Bjarne. Explains all.

73

Max


On Sat, Sep 5, 2020 at 11:44 AM, Bjarne Mjelde wrote:
It frequency range from 1 kHz to 1800 MHz. However with the current dlls available for HDSDR, minimum LO frequency is 1000 kHz for 2 MHz sampling. This means that the alias-free range starts a lot higher than say Grimeton. There is a test dll which allows LO to be set at 500 kHz which remedies this. I'm sure Simon finds a way too.
--
Bjarne Mjelde


Re: RX666/888 on VLF?

Max
 

Good point Alan!




It might be easier on 17.2KHz:-)

73 Alan G4ZFQ


Re: RX666/888 on VLF?

Bjarne Mjelde
 

It frequency range from 1 kHz to 1800 MHz. However with the current dlls available for HDSDR, minimum LO frequency is 1000 kHz for 2 MHz sampling. This means that the alias-free range starts a lot higher than say Grimeton. There is a test dll which allows LO to be set at 500 kHz which remedies this. I'm sure Simon finds a way too.
--
Bjarne Mjelde
arcticdx.blogspot.com
Remote receivers: 
arcticsdr.ddns.net:8073/
kongsdr.ddns.net:8074


Re: RX666 and RX888 as VHF receivers

Alan
 

I'm now using the Airspy Discovery which has a different
architecture.?? Whether it's worth moving from the Discovery or Airspy R2 to the RX-888 is an unknown quantity!

David,

Yes, but I think it is really a bandwidth question.
I do not think anything is going to significantly improve on the HF+ within it's frequency/bandwidth limitations. Probably much the same with the R2 despite it being 12 bits.

I see that Simon has completed development on the RX-666, so where
dose that leave the RX-888??? Fully compatible?

I'd guess that the VHF section will not be available?

73 Alan G4ZFQ


Re: RX666 and RX888 as VHF receivers

David J Taylor
 

David,

This is used in Airspys so it's probably not bad.

73 Alan G4ZFQ
=====================================

Yes, I know, but I'm now using the Airspy Discovery which has a different architecture. Whether it's worth moving from the Discovery or Airspy R2 to the RX-888 is an unknown quantity!

I see that Simon has completed development on the RX-666, so where doe that leave the RX-888? Fully compatible?

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv


Re: RX666/888 on VLF?

Alan
 

For example, I would like to listen to Grimeton on 19.2 kHz.
Max,

It might be easier on 17.2KHz:-)

73 Alan G4ZFQ


Re: RX666 and RX888 as VHF receivers

Max
 

I too am interested in VHF/UHF performance. Can someone with RX666 or 888 perhaps let us know even just a first opinion of performance, perhaps on VHF BFM 88-108 MHz, and 144MHz/432MHz?

I am assuming it should be quite respectable, but not found one post where anyone posted their experiences or screenshots.

Anyone RX666 or 888 owners out there to give an opinion, maybe compared to RTL-SDR or R2 for example, or perhaps compared to SDR Play RXs?

If it is half-way decent I will be ordering an RX888 and selling my RSP2Pro!

73

Max


RX666/888 on VLF?

Max
 

Can anyone who has one please tell me if this receiver goes down to VLF?

I thought sure I read somewhere (now I can't find it) that the lowest receivable frequency is 100 kHz but that is not a restriction that is specifically mentioned in Oscar's original description here:
http://www.steila.com/blog/index.php?controller=post&action=view&id_post=18

For example, I would like to listen to Grimeton on 19.2 kHz.

Any RX666 or RX888 owners that can verify? 

73

Max


Re: IDE / ISA TV cards for computers...

Max
 

All the SDRC supported radios are listed here:
https://www.sdr-radio.com/radios

No old TV cards supported AFAIK. Sorry to ask, but why would you want to, apart from in the name of experimentation? Nothing wrong in that of course!  

73

Max


Re: RX666 and RX888 as VHF receivers

Alan
 

The R820T2 strong signal performance is indeed an unknown.
David,

This is used in Airspys so it's probably not bad.

73 Alan G4ZFQ


Re: RX666 and RX888 as VHF receivers

Simon Brown
 

-----Original Message-----
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of David
J Taylor via groups.io
Sent: 05 September 2020 08:17
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] RX666 and RX888 as VHF receivers

From: Bob Dengler

I bought mine strictly for UHF use. With my 12 bit Airspys at full BW I'm
constantly having to throttle back the gains to the point the 12 dB SINAD is
~0.4 to 0.5 uV. Decimation does help a lot but then I can only see a few
hundred kHz - might as well get a Funcube Dongle. The RSP1a is a bit better
@ 14 bits but it's phase noise is considerably worse than the Airspys, so
any gains in dynamic range are lost if there are any strong signals within
~60 kHz of the receive frequency.

I'm hoping the RX-888 will be the best of both worlds: 16 bit resolution &
MHz BW. I only need 5 to 7 MHz so the R820T2 limitation won't bother me.
My main concern is the dynamic range of the R820T2. If it ends up being a
significant limitation I'll probably build my own downconverter to 20-30
MHz.

Bob NO6B
======================================

Bob,

Yes, I had been thinking along similar lines, but one of my applications
would be for 137 MHz weather satellite reception including Meteor M N2
reception where the decoder is quite closely tied in with SDR# and I can't
see Airspy spending a lot of time writing a front-end for competing
hardware! Meteor with SDR-Console is much more of a kludge as far as I
know. Pagers are very strong here and only some tens of kHz away. The
R820T2 strong signal performance is indeed an unknown.

With the RX-888 I'm buying a lot of capability I don't need, and I've seen
other hardware which promised a lot but was very poorly supported and rather
unreliable (Lime).

But I will be very interested to hear how you get on....

73,
David GM8ARV




--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: RX666 and RX888 as VHF receivers

David J Taylor
 

From: Bob Dengler

I bought mine strictly for UHF use. With my 12 bit Airspys at full BW I'm constantly having to throttle back the gains to the point the 12 dB SINAD is ~0.4 to 0.5 uV. Decimation does help a lot but then I can only see a few hundred kHz - might as well get a Funcube Dongle. The RSP1a is a bit better @ 14 bits but it's phase noise is considerably worse than the Airspys, so any gains in dynamic range are lost if there are any strong signals within ~60 kHz of the receive frequency.

I'm hoping the RX-888 will be the best of both worlds: 16 bit resolution & MHz BW. I only need 5 to 7 MHz so the R820T2 limitation won't bother me. My main concern is the dynamic range of the R820T2. If it ends up being a significant limitation I'll probably build my own downconverter to 20-30 MHz.

Bob NO6B
======================================

Bob,

Yes, I had been thinking along similar lines, but one of my applications would be for 137 MHz weather satellite reception including Meteor M N2 reception where the decoder is quite closely tied in with SDR# and I can't see Airspy spending a lot of time writing a front-end for competing hardware! Meteor with SDR-Console is much more of a kludge as far as I know. Pagers are very strong here and only some tens of kHz away. The R820T2 strong signal performance is indeed an unknown.

With the RX-888 I'm buying a lot of capability I don't need, and I've seen other hardware which promised a lot but was very poorly supported and rather unreliable (Lime).

But I will be very interested to hear how you get on....

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv


Re: RX666 and RX888 as VHF receivers

Bob Dengler
 

At 9/3/2020 09:11 PM, you wrote:
With prime interests only above 30 MHz, do the RX666 and RX888 offer me
anything? OK, a 16-bit ADC rather than 12-bit or 14-bit in units like the
RSP, RTL dongle or Airspy R2, or higher in the Airspy Discovery, so possibly
more dynamic range (if the rest of the system is up to it).

Is anyone seriously considering these units as being preferred for VHF
applications? To me they seem over the top, and likely lacking in support
for other SDR software....
I bought mine strictly for UHF use. With my 12 bit Airspys at full BW I'm constantly having to throttle back the gains to the point the 12 dB SINAD is ~0.4 to 0.5 uV. Decimation does help a lot but then I can only see a few hundred kHz - might as well get a Funcube Dongle. The RSP1a is a bit better @ 14 bits but it's phase noise is considerably worse than the Airspys, so any gains in dynamic range are lost if there are any strong signals within ~60 kHz of the receive frequency.

I'm hoping the RX-888 will be the best of both worlds: 16 bit resolution & MHz BW. I only need 5 to 7 MHz so the R820T2 limitation won't bother me. My main concern is the dynamic range of the R820T2. If it ends up being a significant limitation I'll probably build my own downconverter to 20-30 MHz.

Bob NO6B


IDE / ISA TV cards for computers...

wbarroso@...
 

SDR program for some of the old TV receive cards for computers, what cards out there use SDR-Radio for the S/W ?


Re: RX666 and RX888 as VHF receivers

Zacharias Liangas
 

i feel very bad that the RX888 is limited to only 8 instead of the 32 as noticed..
I originally hoped that it could be OK for using it in  the top of hour  new listening..


SDRPlay RSPDuo

Everett N4CY
 

Simon,

Are there any plans to add  to SDR Console a Diversity mode using the SDRPlay RSPDuo? Also are you aware of any other manufactures that will be offering Duel receives that can be operated in diversity mode?
 
Everett N4CY


Re: RX-666 Testing

Bjarne Mjelde
 

Yes I noticed that. However, soldering the two unsoldered pins did not help in my case.
--
Bjarne Mjelde
arcticdx.blogspot.com
Remote receivers: 
arcticsdr.ddns.net:8073/
kongsdr.ddns.net:8074


SDR# & Scytale c. Aero mode

Derek Henderson
 

Hello to all Is there any members of the group familiar with Scytale c decoder 
I have this program running on my pc in conjunction with Jaero. Jaero is running fine 
decoding from Alphasat  but I cannot seem to get Scytale to work even though the
screen shows it to Be getting a signal Is there any check boxes I have missed ie port
numbers etc configuration etc ?? 

I have the SDR# Scytale c plugin downloaded but have not done anything with that yet 
As I have not very much experience with plug ins I have looked on YouTube on how to install this but it’s little bit to quick for my old eyes Any help appreciated 
Derek Henderson


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