XtremeDx H7113R Transceiver - back side PCB and plate

HF Tx router

I2C controlled HF Tx router 

- 50 MHz Nyq filter

- Tx preamplifier

- preamplifier BIAS on/off by i2c

- direct signal routing on/off by i2c

- fixed value ATT on preamplifier in/out

- DC blocking and ESD protection at input

RF HF router

I2C controlled HF RF router

Contains DC blocking, ESD protection, overvoltage protection, step-ATT, HPF, NYQ filter, 20 dB preamplifier and RF-ports for external modules.

XtremeDx H7113R Transceiver assembly

 The front panel and PCB for XtremeDx H7113R SDR

(not real scale)

    

4L PCB, The bottom layer

Top view, all layers

STM32 controller. Diff RF decoupled from 12VDC power supply. 7 ADC multiplexed inputs for DC U/I measurements as RFDSP voltage and current, PA voltage and current, VSWR voltages on VSWR bridge). Hole for one optical encoder. Holes for two mechanical rotary encoders - MULTI and ATT, one analog potentiometer for volume control on ADC. All inputs are RF and ESD protected. USART for communication with baseboard. (this architecture was tested in my H7R SDR) 

Front panel and PCB assembly

 

The front panel + the display

    

2024.09.dd

HF PA100 F101 2V0

 HF PA100 F101 2V0

HF power amplifier 3.5...30 MHz , 110W..130W PEP

- with 1W driver section

- low input power

- 30 dBc IM3 

 

Two element delta-loop antenna for 20m band

Two element critical coupled delta-loop antenna for 20m band. 

The distance between elements is 3m. One element is radiator the another is the reflector. The radiation direction can be changed using relay.

The F/B ratio is 26..30 dB. The SWR is 1.2- 1.4.

QRO - Linear Power Tube Amplifier - 800W PEP CW/SSB

 2x GI7B tubes.