Welcome to OneChipDesign !

*** HAMSTIR ST2 ***

Interface for FT8, JT65, PSK31, Echolink, eQSO, APRS, SSTV etc..
No additional cables are required.
Rig cable is wired with proper plug so as to meet your transceiver.
When you order this product, please let us know your rig name.
For high power operation such as HF rig use, HAMSTIR DX is recommended.
Full photo-coupler connection separates rig block from PC block.

There are two basic settings as "Digital Communicating Priority" and "APRS9600bps Priority".
"Digital Communicating Priority" is normal. This priority setting is done by solder short.

The difference is as below.
"Digital Communicating Priority" is good for noise and less distortion.
- [Good] = WSJT-X, MMVARI, MMTTY, EchoLink(VoIP), APRS1200bps. [No Good] = APRS9600bps
"APRS9600bps Priority" is good for Packet 9600bps by flat audio range. (depends on rig spec.)
- [Good] = APRS9600bps, -[Normal] = APRS1200bps, WSJT-X, MMVARI, MMTTY, EchoLink(VoIP)

By USB serial converter chip, PTT operation can be taken.
The driver installation is automatically executed by internet auto-query.
In no internet, manual driver instration is reqired. This driver file can get at FTDI site
or OneChipDesign site.

Various plugs can be taken so as to meet your transceiver.
When you request a quotation, please let us know model name. We will suggest a proper connection.
IF you choose MiniDIN 6P or DIN 8P plug, conversion cable is available for other rigs.
Various models can be used by using a proper conversion cable. (eg. 6P to Hand-held)

Specifications )
* Some items are as a reference.

  1. USB Port : USB2.0 Full Speed Dual serial converter
  2. Audio Port : 3.5phi Plug to PC MIC IN and SP/LINE OUT (4 pole combo-plug cable available)
  3. Power Supply : +5.0V +/-0.5 --- USB Bus Power
  4. Current Consumption : approx. 30mA --- USB Bus Power
  5. Input Level : Less 1.0Vrms --- From Rig DATA/SP OUT (Adjustable by SFR)
  6. Input Impedance : approx. 10K ohms --- (Adjustable by SFR)
  7. Output Level : Less 2.0Vp-p --- To Rig MIC/DATA IN (Adjustable by SFR)
  8. PTT Driving : Open-Drain --- Sink current should be less 1A.
  9. PTT Selection : RTS(default)/ DTR
  10. Continuous TX Protection : approx. 45sec --- Solder short
  11. Hand-held Rig Selection : 2.2k, 33k, 10k on board --- Solder short
  12. Squelch Input Selection : CTS fixed
  13. Squelch H Input Voltage : Min +3.0V --- Input current approx. 0.25mA
  14. Mute on Squelch for software TNC : ON/OFF --- Solder short
  15. Cabinet Dimension : W82 - D130 - H24mm --- Materials : Case=Alminum,, Panel=ABS
  16. Weight : approx. 250g --- with Cables
  17. Accessories : User Manual, Soft Case
    * This uses PC on-board sound device. Caution to disable (off) all enhansment (Echo EQ) for TRX quality.
    * Adjustment by built-in SFR (semi-fixed resister) : Take adjustment PC sound device first.
    . When can not adjust, use built-in SFR.
    * VCCI, FCC, EN Compliance are not confirmed, but, designing considered.
    * RoHS Directive : Pb free is not available on components soldering.
    * Products are not by mass-production, but all hand-made samples.

Prices )
1. HAMSTIR ST : JPY 6,800
2. Conversion Cable : JPY 2,000 //from MiniDIN 6P or DIN 8P plug to various models
* Paypal system is available and can take the payment in either JPY or USD currency.
* For credit card customer, e-Bay listing is available if you wish.

English page for other products.
Go to [ Top ]
Go to [HAMSTIR DX] High spec. Interface page (English)
Go to [HAMSTIR X] Gateway/ Link Unit page (English)
Go to [VoIP-Handset VH-MD6] No Rig Operation Usage (English)

Price List & Order )
--------------Price List (Japanese Yen)--------------
  1. HAMSTIR DX-R1 (MiniDIN 6P etc.) --- JPY 11,000
  2. HAMSTIR ST (MiniDIN 6P etc.) ------ JPY 6,800
  3. HAMSTIR X- 6P (for FM TRX ) ------- JPY 6,800
  4. CONVERSION CABLE (various types) --- JPY 2,000
  5. VoIP-HANDSET VH-MD6 --- JPY 4,900
    (No dry batteries are attached.)
  6. Transportation Charge (normally takes ePacket postal; Air, Resistered)
    * At present 2024 March, ePacket service is suspended. Need to take another way.
    [Example for Asia/ Europe/ N.America]
    ePacket (Air, Registered) --- JPY 870/ 1,030/ 1,410 ; 300g
    ePacket (Air, Registered) --- JPY 1,050/ 1,270/ 1,670 ; 500g
    ePacket (Air, Registered) --- JPY 1,140/ 1,390/ 1,800 ; 600g
    ePacket (Air, Registered) --- JPY 1,410/ 1,750/ 2,190 ; 900g
* Both JPY and USD price are noted in the quotation you have requested.
. Please take either one you wish. . Paypal system is available to the payment in either JPY and USD currency.
* After the confirmation of payment by Paypal auto-mail, products will be shipped out.
. Also, tracking number will be mailed to you.
* Transportation days takes about 7 to 14 days (ePacket =Air, registered).
* e-Bay listing is available if you wish.

-----------------Inquiry & Order Form----------------
Copy and edit below items when you send a mail.
  1. Model : HAMSTIR DX HAMSTIR ST2 HAMSTIR X-6P VoIP-Handset VH-MD6
  2. Operating Mode : FT8 JT65 PSK31 RTTY SSTV Echolink APRS 1200/9600bps ---
  3. PC OS : Windows 7 - 11, VISTA, XP
    * High-light comment if Audio Jack is 4 poles type (Combo Jack)! Available!!
  4. Receipient :
  5. Address :
  6. Telphone No.: - - (for transportation)
-------------------------------------------------------------
Inquiry and Order :sales@onechipdesign.com

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

= HAMSTIR DX-R1
This is best for high-power operating such as HF band..
PC block and rig block are isolated and connected by photo-coupller. (no transformer used)
Also, PC CW-Keying can be operated.

= HAMSTIR ST2
Basic circuit design is simlified from HAMSTIR DX.
1. passive audio input/output line by using PC on-board sound device.
2.The limitted transmitting time (about 45seconds). This is better for software TNC .
If you operate only V/UHF only, HAMSTIR ST is enough for RF interference.
In general use less 50 watts O/P power, You can easily countermeasure the problem by ferrite-core etc..

Download setting example photos for WSJT-X(zip898KB) :
This is the case of WSJT-X settings, but almost common on the COM and sound items.
Most of sound devices has a sound enhansment such as surround effect.
This digital processing makes bad encoding and decoding. So, it should be turn to off or through.
CAT and CI-V features are for rig controling by PC.
Do not set any when proper cable is not prepared. Otherwise, error massage will be appeared.
However, WSJT-X "DX Pedition Mode" recommends CAT controling.
This controlling is not "must". When the bandwidth is set to "3000Hz"or less in "Hound", no need to take CAT (CI-V).
If you operate in"Fox", CAT (CI-V) cotrolling is required to receive arround 4000Hz.
If you wish to take CAT controll (bandwidth 3000 to 4000Hz), use USB CAT Cable in the market.
Find it by "USB-CAT-Cable" or "USB-CI-V-Cable" inquiry. FTDI chip used is reliable!
And, this is for definitely low power operating such as FT8, JT65 etc..

FT8 DXpedition Mode in No CAT control :
The setting and QSO example page of FT8 DXpedition Mode in No CAT and No CI-V control.

One improvement for RF interference (.pdf) :
In case of some PC use, mulfunction (on PTT or Sound) may happen. Try by this.
It requires the soldering but not so difficult.

Echolink is a registered trademark of Synergenics, LLC.
APRS is developed by Bob Bruninga, WB4APR.
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.

Copyright 2012 OneChipDesign All rights reserved.