BI3QAC KV4P HT is an external hardware device that connects to a phone via a data cable, and uses an app to enable two-way communication. Have any experienced users created replicas of this? Project address:https://github.com/VanceVagell/kv4p-ht/tree/main https://www.kv4p.com/
BG2EFX It is rumored that it can interfere with the problem, which raises concerns. I'm a fruit user, so I'll take a look.
BloodBlade BI3QAC I haven't tried v1 using a development board, but it seems relatively simple. V2 has a filter and should perform better in terms of interference. However, I don't recommend making v2 yourself because the components are difficult to obtain, and soldering is also quite complicated.
BloodBlade BI7ALG No, if you're going to calculate it that way, then the finished product must be either a Hytera PDC680 or a Motorola ION.
BI7ALG BG2EFX Both the app and the radio can be controlled, but using Bluetooth with the Vino is more convenient.
BI2RC I have one on hand, and its performance is quite mediocre. Specifically, it's a single-U or single-V stage (related to RF chips and peripheral filtering circuits), and the transmit power is also relatively low.
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