LF: X1M Chinese QRP HF Transverter transmitting well on 475khz

["Hans-Albrecht Haffa" <dk8nd@web.de>]

 

Dear Marco,

having a look on the specifications I noticed, that the receiver seems to have a wideband ssb-xtal filter in the receiver path. For all of us of interest: Is the X1M a stable VFO to be used as a LW-MW driver or has it too a rx with good sensitivity and bandwidth for aural cw.  My rx for LW and MW: EKD 300 with 100 Hz mechanical filter on the last IF (200 kHz), followed by a audio-cw-Filter (b=100 Hz/ -20 dB).

 

55, Hans-Albrecht

DK 8 ND

Gesendet: Dienstag, 17. September 2013 um 09:13 Uhr
Von: Marco <scholzmarco@web.de>
An: rsgb_lf_group@blacksheep.org
Betreff: AW: LF: X1M Chinese QRP HF Transverter transmitting well on 475khz

Hello Warren,

Not a technical precise answer, but i did last night a quick WSPR test and the X1m 2min. transmission looked stabile on my primary receiver (see attached snapshot).

In addition i received WSPR on 474.2KHz with the X1m and my FT-857 in parallel both on Miniwhip antenna without any preamp. The FT-857 received abt. 3dB better. For exampIe I didn’t had a decode with the X1M when the FT-857 shows a station with -30dB. However not so bad the result for this small box. Will try it in the next days on 137KHz with a preamp and the miniwhip antenna on both receivers.

 

vy73

Marco, DD7PC

 

Von: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Lubos OK2BVG
Gesendet: Montag, 16. September 2013 18:47
An: _RSGB_LF
Betreff: RE: LF: X1M Chinese QRP HF Transverter transmitting well on 475khz

 

Hello Marco and Warren!

I didn´t  test the stability, but there is written in the manual: "The stability 0,5 ppm" 

Yes, I think the same, X1M might be useful for LF and MW activities. I don´t expect, it will be better than my "big receivers", but it is really interesting.

 

Lubos, OK2BVG 

---

Date: Mon, 16 Sep 2013 08:47:03 -0400
From: wd2xgj@gmail.com
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: X1M Chinese QRP HF Transverter transmitting well on 475khz

Marco, Lubos,

     Is the frequency stability good enough for QRSS or WSPR?

 

73 Warren

 

 

On Mon, Sep 16, 2013 at 8:20 AM, Lubos OK2BVG <bvgbob@hotmail.com> wrote:

Hello Marco!

By coincidence - I received the X1M two weeks ago :-)

I haven´t tested transmitter. But  the receiver is not bad, indeed (...with an external input filter ,  of course).

 

Lubos, OK2BVG

 

****************************************

 

 

> From: scholzmarco@web.de
> Date: Mon, 16 Sep 2013 12:36:10 +0200

> To: rsgb_lf_group@blacksheep.org; rsgb_lf_group@yahoogroups.co.uk
> Subject: LF: X1M Chinese QRP HF Transverter transmitting well on 475khz
>

> Hello,
> Received on the weekend the Chinese X1M HF-Transceiver. This Rig can transmit from abt. 0.1 - 30MHz, but has only bandpass filters on 80,40,29,15 and 10m band. So i tried 475kHz with a external bandpass filter and i got 5W in USB or CW (Not tried it, but this should work as well on 137KHz). In combination with a bigger PA a relativ easy way to transmit on the low bands.
>
> vy73
> Marco, DD7PC

 

 

--
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1

 

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