Please note, due to very long delay at German customs, delivery time to
Germany is more than 60 days
I offer you DIY KIT of internal automatic antenna tuner for mcHF transceiver.
This autotuner have low profile and fit well in Chinese case for mcHF SDR
Internal automatic antenna tuner DIY KIT included:- fully assembled and tested
autotuner PCB with flashed controller ATmega328;- all parts and wires you needs
to install autotuner to mcHF SDR radio.All parts, using in this autotuner, are
new and original.
You need to install autotuner to mcHF transceiver by yourself.
To install autotuner your need some solder works and drill one hole at RF PCB
Installation and operation manual you can find here http://mcHF.at
For control the tuner, the E3 encoder in you mcHF SDR radio must be with a
button.Chinese cases are usually equipped with such encoders. If you have an E3
encoder without a button, replace it first with an encoder of the same height
with a button(encoder not included in DIY KIT)
You can install this autotuner to mcHF SDR radio with RF PCB versions:
0.4, 0.5, 0.6, 0.6.1, 0.6.2, 0.6.3 and to RS-918 SDR transceiver
For check possibilities of installation to another versions of RF PCB, please
send me good photo of your RF PCB
Autotuner built by 5x5 schematic.An approximate range of complex impendances,
that the 5x5 autotuner can match by bands, you can see at the picture
Autotuner consist of:11 latching relays,5 inductances (T37 core): 0.1, 0.22,
0.45, 1 and 2.2 mH5 capacitors (high voltage): 10, 22, 47, 100 and 220 pF
Atmega328 as controller and some smd parts.
I will happy to answer all your questions.
73! Alexey UT0UM