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HAMSTIR DX
Interface for FT8, JT65, PSK31, RTTY, SSTV, Echolink, APRS etc.
No additional cables are required. Order-made product.

HAMSTIR DX has full-optical circuit between rig and PC. (no transformer used)
Therfore, HAMSTIR DX is good for high-output power operation for HF band user mainly.
For optical circuit power supply, there are three ways. And, before wiring, this is confirmed you.
1. External power supply for rig +13.8V etc.. This is better for a plural rigs operator.
2. Rig Jack (ACC etc. +V assigned in pin)
3. Batteries built in HAMSTIR DX. Photo coupling becomes only when PC control transmitting,
but not when rig turned PTT on (SSB, CW operating) .
These will be suggested before wiring .
Built-in sound device. [USB PnP Audio Device]

USB serial converter (Virtual COM) dual port by FT2232 FTDI chip.
COM A is for rig 1 --- DX-R1 use only this.
COM B is for rig 2 --- DX-R2 use both COM A and COM B.

Operating Modes)
Rig 1 : FT8, JT65, PSK31, RTTY, SSTV, Echolink (Squelch), APRS 1200bps etc.
Rig 2 : APRS 9600/1200bps, PSK31, JT65, RTTY, SSTV, Echolink (VOX) etc.
*DX-R1 only can provide PC CW-KEY. Request it when order (same price)
*DX-R2 can operate Rig1 and Rig2 independently.

Rig 2 side can choose transmitting time either about 45 seconds or continuous.
HAMSTIR DX-R1 only can take PC CW-Keying by using a part of rig 2 cuicuit.
Please request us when you wish to add CW cable. (price same)

Prices)
HAMSTIR DX-R1 JPY10,600 //Single rig operation
HAMSTIR DX-R2 JPY12,100 //Dual rigs operation



Various plugs can be selected to meet your transceiver DATA terminal etc..
When you order this, please inform us your transceiver model name.
However, MiniDIN 6P or DIN 8P plug is recommended (common DATA terminal). Because conversion cable is available to various models.
Price : JPY1,500

Specifications ) * some items are as a reference.

  1. USB Port : USB2.0 Full Speed
  2. Audio Port : 3.5phi Plug --- MIC IN, SP/LINE OUT (DX-R1 don't have)
  3. Power Supply : +5.0V +/-0.5 --- USB Bus Power
  4. Current Consumption : approx. 250mA --- USB Bus Power
  5. Input Level Rig1/2 : 1.0Vrms/ 10K ohms --- Adjustable by SFR
  6. Output Level Rig1/2 : 0.4Vrms/ 600 ohms --- Adjustable by SFR
  7. A/B-PTT Driving : Open-Drain --- Current less 1A.
  8. A/B-PTT Selection : RTS/ DTR
  9. PTT time limitter : COM-B port only on board --- approx. 45sec.
  10. Hand-held Rig Selection : A/B-PTT on board
  11. Squelch Input Selection : A/B Port CTS
  12. Squelch H Input Voltage : Min +3.0V --- Input current approx. 0.25mA
  13. Mute on Squelch : ON/OFF Selectable
  14. 6.0/ 12.0MHz Clock Freq. Accuracy : Less 0.25%
  15. Temperature Ambient : 0 deg.C - 70 deg.C --- IC Spec. Followed
  16. Cabinet Dimension : W82 - D130 - H24mm --- Materials : Case=Alminum,, Panel=ABS
  17. Weight : approx. 250g --- with Cables
  18. Accessories : User Manual, Soft Case
    * Adjustment by built-in SFR (semi-fixed resister) : First, take PC on-board by Sound Device window.
    . Use built-in SFR only when can not adjust.
    * VCCI, FCC, EN Compliance are not confirmed, but, designing considered.
    * RoHS Directive : Pb free is not available on component soldering.
    * Products are not by mass-production, but all hand-made samples.

Inquiry or Order :sales@onechipdesign.com

Q & A)
Q) What's the differerence?

= HAMSTIR ST
Basic circuit design with dual USB Serial converter (COM port) and
passive audio input/output line.
One of COM port is set as limitted transmit time (about 50seconds).
No other cable is required for PC and Rig connection except conversion cable.
This is not only simple but also better reliability (less contact points).

= HAMSTIR DX-R2
This has a photo-coupled circuit between PC block (COM/Sound) and rig control.
This is good for high-power operating.
DX-R2 can control two systems together independently as below example.
Rig1 : Echolink or other digital mode.
Rig2 : APRS or other digital mode

= HAMSTIR DX-R1
This uses the same board as DX-R2. But this is limitted to only rig1 use.
And a part of rig2 circuit is used for PC CW-Keying (no additional cost).
This is especially good for high-power operating such as HF band.

If you operate only V/UHF only, HAMSTIR ST is enough.
General use less 50 watts O/P power, You can countermeasure the problrm by ferrite-core etc..

Download basic setting for digital communicating(zip898KB) :
Most of pictures are Japanese, but the points will be understood.
This is the case of WSJT-X settings, but almost common on the COM and sound items.
Most of sound devices have a sound enhansment such as surround effect.
This digital processing makes bad encoding and decoding.
CAT and CI-V features are for rig controling by PC, not for digital cmmunicating.
If there is not a preparation for it, refrain from setting !


Echolink is a registered trademark of Synergenics, LLC.
WSJT-X is licensed under the terms of Version 3 of the GNU General Public License (GPU).
WIRES-X is a registered trademark of Yaesu Musen Co.,Ltd.

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