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

PDT？我们大庆原来有这玩意可费中继，因为他是一直发射信号的。。慎重慎重~

设备不是问题，主要还是有架设位置让你架设

@"BG2EFX"#p21944 那看来普通dmr中继比较合适些 pdt也就玩个新鲜还对手里的机器限制很多得支持pdt才能玩

@"BG1QGD"#p21966 嗯确实是要慢慢找高山最合适但维保难

有钱有闲肯定还是集群体验更好。优点： - 没有什么时隙12、动静态组了，在移动站设置就能随意加入离开谈话组。 - 基站调度的频率数量多于中继，可以同时承载多路通话。 - 可以架设多个基站漫游，不像中继都是单打独斗，有范围限制。当然以上是DMR集群的，不过PDT集群的功能应该也类似（模拟集群都能做到这些功能呢）。缺点： - 贵，如果再考虑到中继可以用廉价设备组装的话，那就更贵了。 - 麻烦。 - 像EFX老师说的那样，信令时隙会一直处于发射状态。 - 不确定能否给一个基站批两个以上的使用频率（只有两个频率的话那就不如中继模式了）。

不知道一个月电费得多少这玩意24小时在发射

@"BI1BIF"#p21991 所以话又回到前几天我回答的那个问题上面当你到这个节骨眼你就知道为啥圈里有个不成文的规定。。为啥不能问中继的准确QTH了~ @"BI1UCA"#4180

PDT集群太贵了一套最低要求的设备也是一万多很少人愿意出这个钱

现在好像只有珠海、南通、成都、还有东北的一个城市，有人出钱装了PDT集群，这玩意体验肯定比DMR好而且更好玩，通话组多，但是玩的人少

Beijing amateur PDT cluster – anyone interested?

BI1BIF

Recently, I've noticed that the official DMRS (Digital Mobile Radio System) repeaters in Beijing have been consistently unmaintained, resulting in no signal and a lack of usable DMRS repeaters within the city. After seeing reports from hams in other areas about their frustrating experiences with local repeaters and the challenges of connecting to a nationwide network, I started wondering if it would be possible for me to set up my own repeater.

Currently, there are two directions.
1. The PDT cluster can be directly compatible with standard DMRS repeaters.
2 Standard DMRS repeaters.
The two prices could differ by several thousand yuan.
Most features are achievable, including dual slot operation, local Beijing-to-national network connectivity, and the MMDVM46001 group. The PDT cluster might offer a better experience.

Another important consideration is the legal feasibility of obtaining a license for an amateur radio repeater, including whether it can be registered under a personal name.

Are there any like-minded friends?😁Add me on 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).

wonkaski

BI1BIF 感谢

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