Blog
How to select the battery for your HF tranceiver
- Oct 28,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
Many hams like to make QSO outdoor, so the battery is very important to them. Do you know what are the common amateur radio portable batteries? ...
What's the center frequency of antenna
- Oct 28,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
Each antenna has a certain frequency range called bandwidth. In the range, the antenna has the lower impedance and the highest efficiency, which is equivalent to a band-pass filter. The best frequency point in the middle of the frequency range is the center frequency, its SWR is the lowest, and the efficiency is higher. ...
Something about Busy Channel Lock-out Function
- Oct 28,2021
- Vivian
- 0 Comments
- Radio Function
Busy Channel Lock-out feature often abbreviated to BCL on two way radios. But it depends on the different radios, on some radio it says BCL, this is also commonly referred to as TX Inhibit on some other radios. For example, on Retevis RB17P, it says "Busy Lock". but on Ailunce HD1 it says" TX Authority". ...
Frequency Sweep Feature on Retevis RA685
- Oct 27,2021
- Vivian
- 1 Comments
- Product Introduction
Radio frequency sweep or frequency sweep or RF sweep apply to scanning a radio frequency band for detecting signals being transmitted there. On Retevis R685 analog radio, you can do a frequency sweeping. ...
What’s The Difference Between Ham Radio and CB Radio?
- Oct 27,2021
- Vivian
- 0 Comments
- Radio knowledge
The Difference Between Ham Radio and CB Radio ...
Is There a Good Radio Recommend for Entry Level Amateur
- Oct 27,2021
- Vivian
- 0 Comments
- Product Introduction
We often get some questions said" is there a good radio recommend for me entry level amateur? Maybe you are just starting into ham radio and you have no clue what possibilities are even out there. Let us talk about it in this article. ...
New 5W Dual band Ham Radio Retevis RA685
- Oct 26,2021
- Vivian
- 0 Comments
- Product Introduction
Retevis RA685 is EU version dual band ham radio. The transmit frequency is 144-146Mhz,430-440Mhz, and the receive frequency is 136-174Mhz,400-480Mhz; ...
The new channel display method on Ailunce HD1
- Oct 20,2021
- Vivian
- 2 Comments
- User Tutorial
How to set the HD1 Rx screen display mode? ...
Features of Digital Radio Vocoder
- Sep 30,2021
- Vivian
- 0 Comments
- Radio knowledge
Vocoders are basically used for digital coding of speech and voice simulation. The bitrate for available narrowband vocoders is from 1.2 to 64 kbps. ...
What's the meaning of DOUBLE and SINGLE for the RPT-MOD setting of Retevis RT23
- Sep 29,2021
- Yamy
- 0 Comments
- User Tutorial
Retevis RT23 is a cross-band repeater HAM Radio, but do you find it can set double or single repeater mode? What's the difference between the two modes? ...