Beijing amateur PDT cluster – anyone interested?

BI1BIF

近期发现北京官方的dmr中继接连的无人维护，没信号，城里基本没有可用dmr中继，看外地各地友太玩的水深火热，还有全国大网，于是萌生了为什么不自己架个呢？

目前有两个方向
1一步到位PDT集群向下可兼容普通dmr中继。
2普通dmr中继。
这两成本可能差大几千块钱
基本都能实现双时隙，北京本地-全国联网-mmdvm46001组，pdt集群可能更好玩点。

还有就是合法假设的可行性问题，个人名义是否申请中继台执照等等。

有没有志同道合的小伙伴😁可以加我v：zdybelieve

BG2EFX

PDT?
We used to have a large oil field in Daqing.
This device consumes a lot of power because it's constantly transmitting signals.
Please be careful.

BI1BIF

BG2EFX So, a standard DMRS repeater seems like a better option. PDT also offers some novelty, but it has many limitations and requires specific equipment to use.

BG1QGD

The equipment itself isn't a problem; the main issue is the location where it needs to be installed.

BI1BIF

BG1QGD Yes, it's true that finding the most suitable high-altitude location requires a gradual approach, but maintenance can be challenging.

BG2EFX

BI1BIF So, we're back to the question I answered a few days ago.

When you arrive at this critical juncture, you'll understand why there's an unspoken rule in the community... and why it's not appropriate to ask about the exact location of a repeater.

@BI1UCA

BloodBlade

Having money and free time definitely makes a cluster experience more enjoyable.

Advantages:

There are no specific time slots (e.g., 12) or static groups; you can freely join and leave conversation groups within the mobile station settings.
The base station has a higher frequency capacity than the repeater, allowing it to support multiple calls simultaneously.
Multiple base station roaming is possible, unlike repeaters which are typically single-point operations with limited range.

Of course, the above refers to DMR clusters, but the PDT cluster should also have similar functionality (simulated clusters can achieve these features).

Disadvantages:

Expensive; even more so if you consider that repeaters can be built using inexpensive equipment.
Sorry.
As EFX mentioned, the signaling window remains in an always-on transmitting state.
I'm not sure if a base station can be granted two or more frequencies for use (if it only has two frequencies, it wouldn't be as effective as a repeater).

BH6IDD

I don't know how much the electricity bill will be for this month.
This device has been operating continuously for 24 hours.

BI1BIF

BG2EFX Haha!

BI1UCA

BG2EFX 知道了，师傅别念了，知道了。(」ﾟﾛﾟ)｣

wonkaski

The PDT cluster is too expensive; even the minimum required equipment costs over $10,000. Few people are willing to spend that much money.

wonkaski

Currently, it seems that only Zhuhai, Nantong, Chengdu, and one city in Northeast China have implemented PDT clusters. This technology definitely offers a better and more enjoyable experience than DMR, with the ability to form multiple communication groups, but there are fewer users.

unsignedchar

wonkaski I haven't heard of Zhuhai before.

wonkaski

unsignedchar Yes, there are some in Zhuhai that are still active. You can find information about them in a PDF document created by an amateur PDT group; it contains details on those groups.

BI1BIF

However, after checking, it seems that there are currently no DMR digital repeaters that have been approved for amateur use.

BI1BIF

The official response has arrived, and it seems that setting up a personal or organizational amateur radio repeater in Beijing is currently impossible.

wonkaski

BI1BIF There are reportedly 7 repeaters in Beijing. Could you please specify which 7 they are?

unsignedchar

wonkaski I'm in Zhuhai, and I haven't heard of it. Could you possibly give me directions?

BI1ULP

wonkaski https://forum.hamcq.cn/relayStation/110000?cityName=%E5%8C%97%E4%BA%AC%E5%B8%82&provinceName=%E5%8C%97%E4%BA%AC%E5%B8%82&provinceCode=110000&municipality=true

wonkaski

unsignedchar Application email ID: yh00520@163.com Contact person: Amateur PDT cluster management group, Cluster network access contact: BG4QNC, QQ: 109151515, VX: Yh109151515

BI4IVE

Region Region Region Self-assessment

BI1BIF

The most recent reply is as follows.

wonkaski

BI1BIF 感谢

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