XHData D-808

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satnipper
Posts: 951
Joined: 03 Oct 2014 12:58
Location: Western Europe

XHData D-808

Post by satnipper » 17 Feb 2018 10:47

Not been much talk of this one here. All bands including RDS Chinese portable. Google for reviews and prices - £81 ish.

Stuart

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Patrick73
Posts: 232
Joined: 22 Mar 2015 12:36
Location: french Alps, JN35am

Re: XHData D-808

Post by Patrick73 » 18 Feb 2018 08:19

Hi there !

I ordered mine on Monday, received yesterday (€66 / £58, including shipping).
More to follow ;-)
Patrick
Main interests : NDB, MW & FM DX'ing
REU Editor http://www.classaxe.com/dx/ndb/reu

satnipper
Posts: 951
Joined: 03 Oct 2014 12:58
Location: Western Europe

Re: XHData D-808

Post by satnipper » 19 Feb 2018 19:39

Received mine yesterday. Seems a keeper - good MF sensitivity. RDS seems ok as well but need some lift conditions to see just how good it is.

Tecsun 310 and 380 for sale - £10 each!

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Patrick73
Posts: 232
Joined: 22 Mar 2015 12:36
Location: french Alps, JN35am

Re: XHData D-808

Post by Patrick73 » 20 Feb 2018 19:39

It is slightly less sensitive compared with the PL-380 (at least the one I own).
Slightly less selective as well. Sounds like the DSP is more "agressive". When tuned to a weak station close to a louder one, one has to fine tune / detune by 10 20 or 30k for the signal to become audible and to lock on. No such behaviour on my Tecsun.

Good points : RDS is fine, audio not bad.
Very sensitive on MW (but still showing the so-called "soft mute" issue when tuning. Can be a bit annoying).

For less than 70 euros a nice radio, probably one the best in its range.
Patrick
Main interests : NDB, MW & FM DX'ing
REU Editor http://www.classaxe.com/dx/ndb/reu

simbeav
Posts: 562
Joined: 14 Oct 2014 15:00

Re: XHData D-808

Post by simbeav » 23 Feb 2018 22:17

Mine arrived the other day as well. The PL-606 had developed a fault on the volume dial.
WFME yesterday morning and VOCM this evening coming in OK with just the internal antenna.
RDS seems ok - No DX at the moment, but both Bridge FM and GTFM which lesser radios struggle with RDS at my QTH were resolved easily and quickly.
OIRT a nice bonus. Direct frequency tuning makes a big difference to the 606.
Haven't tested HF too much as the noise here is too great to get much with a whip.
All-in-all very happy.

KPC850
Posts: 98
Joined: 20 Aug 2016 15:49

Re: XHData D-808

Post by KPC850 » 23 Mar 2018 11:41

MW band modes from the manual online:
Activate 9/10kHz Tuning Button
·When in 9k mode, the frequency range is 522-1620kHz, intelligent step is 1kHz / 9kHz (for Asia, Africa and Europe)
When in 10k mode, the frequency range is 520-1710kHz, intelligent step is 1kHz / 10kHz (for North America)
They seem to have forgotten/overlooked the Australian market (or visitors bringing the radio there), Australia has 9kHz MW steps but have an expanded MW band up to 1701kHz (this receiver only goes up to 1620kHz in that mode according to manual).

Frequencies 1621 to 1710 kHz are completely inaccessible in 9kHz MW step mode - as well as normal tuning, keying in the frequency digits will not work either , nor will fine tuning in 1kHz steps go above 1620.
Even is you save a preset from this frequency range whilst in 10kHz step mode , then try go back to 9kHz step mode, the preset gets erased!

KPC850
Posts: 98
Joined: 20 Aug 2016 15:49

Re: XHData D-808

Post by KPC850 » 26 Mar 2018 15:44

Some very clear pics of the inside of the XHDATA D808 in a posting on this thread on a Russian messageboard:

http://www.radioscanner.ru/forum/topic4 ... msg1353258

I spot a Crystal of 35.328MHz - This is related to Airband mode - this crystal is only active on airband receive. Another radio along side it picks up a XTAL harmonic on 106.0 MHz FM approx ( 35.328 X 3 = 105.984 ), when the XHDATA is in AIRband mode.

Also two other crystals at least one (though I assume both) are 32.768 kHz a common clock frequency (one 32.768 for microprocessor, the other for DSP chip). On some DSP receivers (I'm not saying it happens on this one) harmonics of 32.768kHz may cause noticeable hetrodynes on some AM frequencies (depending on signal strength etc) , 882kHz for example would be one (a harmonic of 32.768 kHz is 884.736 kHz so a 2.736 kHz whistle may be there on 882kHz) (edit - the XHDATA seems to be free of this effect)

(Some edits to my above post made 20-Oct as I have since obtained one!)

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