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Author Topic: New rig spotted in ebay - DCW1 CW transceiver  (Read 4019 times)
KL7KN
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« on: September 18, 2017, 05:08:19 PM »

DCW1 - 'digital radio'   I also posted this over on the Zed  priced @339 USD

 Overall size (H x W x D): 35 x 145 x 78 mm

    Full Weight: 0.53Kg (with 2 lithium pack and ATU installed) No mention if ATU and battry are included in the (somewhat) high price)
    Supply voltage: 8~16.8V (3-4 cell 4.2v lithium battery is recommended) Interesting range of supply voltages
    Battery charge: External 3cell balance charge unit is provided. Good to see, perhaps an indicator the battey packs are included.


    Current drain
    Receive 100mA typically. Not so good - the MFJ-9200 pulls 40mA on RX w/backlight off for example

    Transmit 300-700mA (varies with supply voltage and power output setting)



    Band covered:
    Receive: 5.0-9.5 MHZ (not open in software yet) and 12.0 - 16.5MHZ

    Transmit: 7.000 to 7.300 and 14.000 to 14.350MHZ and 10.1 - 10.15 MHZ
    Spurious content at 3 to 4 w, 2nd harmonic -40 dB typ.

    Freq control: DDS with 50MHZ TXCO (1ppm)

    Disp unit: 2.23' white OLED screen
    Power meter, S meter and SWR display -- Nice touch.

    Digital support: BPSK31/63 QPSK QPSK/R RTTY CW can be decoded standalone.

    TX in Digital mode is hoping to be supported in the future firmware.



    TX power:
    9V @ 1.5 ~ 2 W
    12V @ 3 ~ 4 W
    16.8V @ 5 ~ 6 W

    Load tolerance: 2:1 or better SWR recommended

    Side tone pitch: 1333HZ, 1000HZ, 800HZ, 666HZ, 571HZ, 500HZ, 444HZ, 400HZ

    Keyer Speed: 8-50 WPM;

    Keyer Type: Manual, Iambic_A/B, Dot_prefered, Dash_prefered, Ultimatic Good set of choices
    -----RX---------
    Sensitivity Approx. 0.2 μV for 10 dB (S+N)/N

    I.F. 5.000 MHz, single conversion

    Selectivity. 4-pole variable-bandwidth crystal

    Filter, approx. 300-2000 Hz Looks to be set via front panel control
    Audio output. 0.1 watt into 8-ohm load; stereo plug required

    Shows only 3 available - so, a "garage" manufacturer most likely

    The Sellers name "radioshackus' seems both odd and likely an infringement.  Ebay sez  the seller is based in United States, radioshackus has been an eBay member since Jan 02, 2013

    Bottom line - I'd wait a bit to see if more are offered and let the software mature a bit.

    The rig is offered/made/designed (marked with callsign) BG5ROJ of the BG5ROJ Group.

    You may remember this callsign from the digital (PSK-31) modem that "borrowed" the software from the NUE-PSK modem as seen on the NUE-PSK  Yahoo group a while ago.
    (https://forums.qrz.com/index.php?th...e-nue-psk-i-have-some-questions.567900/page-2)

    For this reason alone, I'll take a pass.
    

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KC4ZGP
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Posts: 1637




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« Reply #1 on: September 19, 2017, 06:09:16 AM »


That's a stupid radio.

It can transmit on 10.1-10.15MHz but cannot receive on10.1-10.15MHz.

Kraus

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AC7CW
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Posts: 962




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« Reply #2 on: September 19, 2017, 07:42:38 AM »


That's a stupid radio.

It can transmit on 10.1-10.15MHz but cannot receive on10.1-10.15MHz.

Kraus



Minor details!
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Novice 1958, 20WPM Extra now... (and get off my lawn)
KB2FCV
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« Reply #3 on: September 19, 2017, 11:10:04 AM »


That's a stupid radio.

It can transmit on 10.1-10.15MHz but cannot receive on10.1-10.15MHz.

Kraus



Do-It-Yourself broadcast radio!

 Grin

Looking at it.. it does kinda look like a similar radio to the KX-1. Look at the button functions and knob functions. Sure, it has a slightly different layout but it is VERY similar.





« Last Edit: September 19, 2017, 11:18:38 AM by KB2FCV » Logged
KC4ZGP
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Posts: 1637




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« Reply #4 on: September 21, 2017, 10:06:49 AM »


D.Y.I broadcast radio.

Ha ha ha!!

That's funny as hell.

kraus
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WM7WM
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Posts: 2




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« Reply #5 on: October 18, 2017, 05:45:39 PM »

So, I bought this radio with the antenna tuner. It seems like it shares some similarities of the KX-1 but, it is not a KX-1. It’s rough around the edges. Many functions haven’t been enabled yet but the builder has been very responsive working though issues I’m having with the radio.

The ATU will not Auto-tune, but can be manually tuned. They are working on my issue as they say it should tune by itself.

Functionality promises a lot for the money once the firmware is squared away. Receive sensitivity is robust and I was able to pull in some signals using an Alex Loop Mag Loop in my basement. Keyer is fixed at 20 WOM for now. That will be fixed soon I hope. That’s too quick for me (in receive anyway).

The digital side has a text decode which worked nicely when it worked. Two lines of accurate text were visible.

Moving around the theee Banda was easy and all three bands are fully available in transmit and receive. CW, USB, and LSB are selected with the mode button.

RIT works nicely. ATU can be bypassed. The filter is infinitely variable and very effective.

If someone will tell me how (I’m too busy to look) I’llmpist some Photos inside and out.

Wes
WM7WM
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KL7KN
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Posts: 116


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« Reply #6 on: October 19, 2017, 02:36:19 PM »

To post pics

Click on Insert Image  (second row, first icon)

This appears -  [ img][/ img]

Paste URL of image between tags - like this:

[ img]https:// Foto fun posted here  l[ /img]

(I've added a space inside the brackets ][  )

 
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