Tsebi Projects Forum

30A, approx. 5-15V - SMPS
Much less noise that the existing SS-301X.

Be sure to make the modification for 220-240V operation before powering up. The fuse should also be changed to a 4A fuse.

https://www.hfkits.com/manual-11-balun- ... -antennas/

T240-43 toroid, 18AWG PTFE wire.

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Attempting to use USB tethering through an Android phone to the rock64 board. The connection needs to be made and then USB tethering can be enabled on the phone. Note that a reset of either the phone or the rock64 board will turn this off and requires manually re-enabling. In order for the usb0 inte...

USB sound card used is a Vention VAB-S13&VAB-S17 sound card, based on the HS-100B chip. This enumerates as plughw:0 in linux.

Based on what we built, the RT-95 should be set to output audio on the hand mic:-

(1) FUNC -> (16) SPK -> HAND (or M&H)

VOL is 8
SQL is OFF
CDT is OFF
BND is W

On the Rock64, alsamixer has the CAPTURE level set to 76.

Additionally - there are a number of useful sources that can help you prepare for the more technical parts of the exam.

https://slideplayer.com/slide/15334207/
https://hamstudy.org/
https://rsgb.org/main/clubs-training/tr ... ock-exams/

For those wishing to get their amateur radio license in Singapore, you will need to take the Radio Amateur Examination (RAE). There are two classes, Restricted and General. The following are some material that you can use to familiarize yourself with for the tests. https://www.sarts.org.sg/on-line-r...

For rock64, you need to either enable AX.25 support in the Linux kernel or compile the modules. These instructions should work:- http://k4gbb.us/docs/raspberry.html For the autogen to work, you also need to install automake and the ncursesw library:- sudo apt install automake libncursesw5-dev AX.25 ...

Measurements of the repeater cavity shows that it is very likely detuned and will require re-tuning of at least one of the receive notches and one of the transmit notches. Of the four, only two are correctly tuned at the moment. S11loss-9V1cavity-6Jan.png VSWR-9V1-6Jan.png The markers are as follows...

In order to get Direwolf working with the rock64 SBC, we will need to figure out the appropriate GPIO pins to use for activating the PTT. The GPIO pin numbers are going to be different from that of the Raspberry Pi. The mapping for the 40-pin header is as follows:- rock64-GPIO-map.jpg More info can ...