RGO ONE in LZ DX contest

Search and pounce in LZ DX contest with RGO ONE. Testing new features – DTR/RTS keying from N1MM contest logger; Testing temperature management with new FAN cradle.

 

 

RGO ONE in LZDX and CQ WW contests

Here is in summary what happened after Dayton HAM vention.
We noticed some issues in spectral purity in RGO ONE transmit part. So we had to move it back to design stage and for almost three months we dealt with these problems. We had to redesign RF MIXER, power amplifier and some other boards in order to improve spectral purity (now it is far better than -43dbC requirement) and linearity.
TX mixer SA612 matched to 50ohm with transformers. Balance potentiometer was implemented.
Amplifier between TX mixer and band pass filters was removed. Additional GALI-74 stage was involved after BPFs.
TX/RX antenna switch in LPF board was changed in order to block positive feedback and improve final amplifier stability.
Power amplifier board P55W includes the following changes: Predriver and drivers were changed to ST microelectronics PD85004 (they are far better than RD06/RD15); Output transformer has been redesigned with Fair rite 43 material core and ratio 1:9.

On receive path – gain distribution was properly adjusted so now the receiver is more quieter.

We recently tested the equipment in LZDX and CQ WW DX contests and it performed great. (LZ2RS Rumi worked with RGO ONE transceiver in category SO 15m QRP)

LZ2RS is getting ready for this year CQ WW DX contest CW part SO 15m QRP

So now we are proceeding with first lot of 10 pieces which will be fully assembled and aligned. I hope they will be ready till mid january.

Upon received feedback of ready to use transceivers we plan kit production for next year.

First 10 RGO ONE transceivers available soon

Thanks to all who wrote me with questions, interest, expectations and positive “WOW” feedbacks.
This urged us to move fast forward and start production of the first ten ready-to-use units. We plan to have them finished till next months. Then next lot will be 100 units probably some of them or most of them will be in a kit form with populated SMD boards with small foot print components.

At the show in Dayton we revealed our target price for the kit base version – $450-$550. Hope to keep it as low as promised but final price will be available soon after first units come to alive.
First units will ship from Bulgaria, then for US customers will try to have stock in US.

So far we have two samples that we tested already in real conditions and worked several contest (LZ2RS helped with this task). They were presented locally in Bulgaria and on Dayton HAM vention 2018.

We’ve been working hard for almost three years to see what you saw… A real performer HF 50W CW/SSB transceiver. We are 4 people in the team.. Other teammates are very good in industrial electronics manufacturing and helping very much with electronic PCB design, parts delivery, microcontrollers and other things.

RGO ONE day one at hamvention 2018, Xenia OH

After the successful presentation start of RGO one we made some contacts on 40/20 meters. Here is a short video of a special event station for the hamvention – W8BI

RGO ONE on Dayton Hamvention 2018

RGO ONE homemade transceiver will be presented during this year HAM convention in Xenia, OH (18-20 may 2018). We welcome everybody to visit our booth #8014. Congrats for friends from AMECO who will give us a shelter.

Right after the HAM convention in Dayton pricing, configuration and availability of the radio will be known

Rgo ONE internal iambic memory keyer

Rgo ONE HF transceiver has built in CW iambic memory keyer.
1. Speed 5 – 45 WPM
2. Keying mode – Curtis A; CMOS B (Accu keyer;CMOS keyer but with 30% more tolerance)
3. 4 memory locations with 128 symbols each
4. Beacon mode
5. Normal/reverse paddle
6. Eligible dot/pause ratio (0,9 – 1,25)

CQ WW 2017 with my all new QRP transceiver

CQ WW DX contest 2017 participation.
First QSO’s with my new transceiver Rgo One.

Here are the results:
Band     QSOs     Pts    ZN   Cty  Pt/Q
3.5       235       265     8      44     1.1
7         275       405    16     58    1.5
14       108       188     12     42     1.7
21        55        103      12     22    1.9
Total     673       961     48    166   1.4
Score: 205,654
1 Mult = 3.1 Q’s

Band conditions were pretty good (though I haven’t heard stations on 10m).

Here is P40L on 20m:

Here is 6Y0W on 20m:

IF/AF unit

This unit includes the following:

  • intermediate frequency IF amplification – MC1350
  • optional crystal filter
  • RX product detector – SA612
  • AF preamplifier – LM837
  • RX MUTE and sidetone input circuitry
  • AF final amplifier – SA58631
  • Fast IF 134kHz Automatic Gain Control scheme – SA612,LM837
  • Optional AF filter board

 

MIC amplifier, DSB, CW modulator unit – SSBGEN

In order to form DSB/CW modulation on TX, a SSBGEN board is used.

It consists of the following parts:

  • Microphone preamplifier and TX audio amplifier – TL082
  • Switched input: LINE IN or MIC (MUX 4053)
  • DSB modulator – SA612
  • CW drive level and form circuit – ½ of MCP4631 dual digi pot
  • SSB drive level (mic level) – ½ of MCP4631 dual digi pot

 

BAND PASS FILTERS

Six band pass filters were built to cover 10-80m bands on RX. Schematic utilizes Skywork solutions AS169 PHEMT GaAs SPDT switches, used in modern wirelless equipments. In order to perform individually “fine tune” a variable coil inductors are used. The module fully meets project CLICKLESS concept as there aren’t any mechanical switching components. MCP23008 serial controlled I/O expander is used to engage needed filter. The board has a provision for two optional filters.

The board

Filters spectrum analyzer plots:

 

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