New TRV for TRX

Hello everyone

I thought to make a new TRV for TRX (HF/VHF).

First, I drew a schematic.

I used dual SAW filters (SF2173E and SF2124E) to accurately get the frequency of 2.4GHz , without any other signal mixing. I used a low-pass filter in the PA. TRV seeded with 5V from a high-frequency DC/DC converter to not interfere with receiver signals (1188Khz). In the receiver I used a SAW filter to isolate the ~740MHz frequency. Comments are very welcome.

73

Artur

I already have a PCB:

Ready to go:

TRV PCB is complete:

Every electronics should have a front panel. TRV has 2pc of these.

Is it good practice to include a diagram of the device inside its casing?

(Laser printing not inkjet!)

Various aspects need to be taken into account when designing electronics.

The DC/DC converter must operate at frequencies whose harmonic frequencies do not interfere with reception on the bands for QO-100:

It is clear from the reception that the odd harmonic frequencies are stronger than the even harmonic frequencies.

TRV output power (2.4GHz) measurement with input power (29MHz) from TRX 15/5/2/1/0.5W:

An instrument for measuring output power is not a CB-radio device:

Thread

CB reflektometer for PA QO-100

Hello
I decided to convert a cheap CB reflectometer with power measurement to a microwave reflectometer.
A meter with no fancy features, no external power supply, simple, small, ideal for field work, everyone will find it useful.

I did not care about high accuracy. Power measurement was accepted with 20% accuracy, and SWR according to the principle the smaller the tilt of the meter when measuring, the better.
The meter shows symmetry with a 50R load. The SWR measurement one way is 1.0, the reverse…

SP3OSJ

Dec 9th 2023

Hi

3W is low power.

It is necessary to ensure that there is no loss, so I do not use antenna cable.

The transmitter must be at the antenna on 2.4GHz!!!

I had to design a component holding the TRV and print it on a 3D printer

Hi Ulrich

Ich danke Ihnen für Ihre freundlichen Worte.

Dies ist ein Hobby. Ein Hobby unterhält, ein Hobby lehrt, es lässt uns unsere Zeit gut verbringen.

Hi

Yes, the kit will be feasible for ham radio operators. I have PCB and 2x front panel and 3D prints. I will not make the KIT because it is time consuming. I will be able to help buy parts. I can show you where I buy the enclosure, mixer, PA OCXO final stage. However, I can't take responsibility for goods from Aliexpress, because the same seller today sells good parts and tomorrow will already sell a fake. I don't know if I can do it here on the forum, so write me an email.

This is the end of the project.

The final look is as shown in the photos.

In digital broadcasts (freeDV) at full drive, the signal is 19dB stronger than the noise. 3W is a lot of power for a 1.1m antenna.

I am now thinking of building a TRV on 3cm with 200mW power. Is there a 3cm TRV section here?