新买了FTX-1C由于电台电源还没到，端午准备带QRP机头出去使用，由于FTX-1的单机头是BNC口，不知道应该选择什么样的天线合适。主要考量有： 1、尽量适配便携性，但又不至于6W、10W啥也通不到。（如果需要大天线保证效果，带个正V或者GP也是ok的） 2、因为平时还是习惯带后背使用，所以暂时不考虑安装后背支架转接（拆除麻烦），但是我应该已经购买了一些常用转接头。另外顺便问下有没有ftx-1合适的电台支架（已买护盾）

@"Carlos"#p97803 没有大佬吗

@"Carlos"#p97803 1，不存在，你本来就是QRP QRP这玩意空军经常你出门还要便携，还要必须通的到，建议上100W 2，一个90度转接头即可 PS，无论你用啥天线，馈线别买太长，尽量粗。天线中心频点要调好，QTP吃的就是天馈..

萌新路过，我在用jyr那个四波段端馈，各方面感觉都还不错，前两天5w通了好几个

@"BG2EFX"#p97850 感谢，90度转接的话感觉用处不大啊，如果是用小天线在UV当手台用，我暂时没找到90度的bnc转sma，如果是接馈线，那感觉直着接也就行了？还是说如果两个都直着接，会太粗了干涉

@"BI7CWS"#p97853 谢谢，我研究一下，主要端馈对树感觉要求挺高hhh。5w在什么波段通多远啊

无线电玩的爽的几大条件：大的功率好的天馈（全尺寸起步）良好的环境三个全占玩的爽三个占两个可以玩的还不错三个占一个可以玩三个全不占=灾难你已经是QRP了，所以天线尽量选一个全尺寸的吧（如果考虑便携性可以看看倒V 正V GP 端馈也还不错），但是非常不建议选加感（缩短尺寸）的，加感天线+QRP非常容易玩一天啥都通不到遗憾回家

@"Carlos"#p97856 其实还好，我那天太晒了就随便找了个地方，天线附近树挺多的😂 我QTH湖南长沙，20米通到了3、8、9区的~

天线我觉得端馈、GP挺合适的，不像正v和八木都要带个撑杆出去，至于QRP这个东西我只能说跟抽奖没区别，建议你找一个好点的电磁环境，这个比较重要

@"Moonlight"#p97857 虚假的，没有给你批执照的经信厅~~你有以上三个可以-5000~~

@"BG2EFX"#p97850 短波台出去架台没必要在意馈线粗细吧，50-5馈线就行，在短波最高10米段，百米长度也不过才衰减7点几dB，外出架台用10米馈线够了，才不到1个dB的衰减，完全没问题。

Please advise on selecting an FTX-1 antenna.

Carlos

I recently purchased an FTX-1C, but the radio power supply hasn't arrived yet. I plan to use it with a QRP antenna during Dragon Boat Festival. However, since the FTX-1 comes with a BNC connector on its own, I'm unsure which type of antenna would be most suitable.
The main considerations are:
1. Aim for portability, but not to the extent that it prevents communication with 6W or 10W devices. (If a larger antenna is needed to ensure optimal performance, using a straight V-shaped or GP antenna is also acceptable.)
2. Because I am used to carrying it on my back, I haven't considered installing a back support attachment (because removing and reattaching would be inconvenient), but I should have purchased some common adapters already.
Also, could you please let me know if there are any suitable radio mounts for the FTX-1 (I've already purchased the shield)?

Carlos

Carlos Is there anyone who can help?

BG2EFX

Carlos

1. It doesn't exist; you already have QRP. QRP is something the Air Force frequently uses. If you need it to be portable and still work, I recommend using a 100W version.

2. A 90-degree adapter is sufficient.

P.S., regardless of which antenna you use, make sure your coaxial cable isn't too long; keep it as short and thick as possible. Also, ensure that the center frequency of the antenna is properly tuned, as this directly affects the performance of the QTP (Quadrature Transmit/Receive).

Carlos

BG2EFX Thank you. It seems like a 90-degree adapter wouldn't be very useful, especially if I were using a small antenna as a handheld device in the UV spectrum. I haven't been able to find a 90-degree BNC to SMA adapter. If I connect the feedline directly, would that be sufficient? Or will connecting both directly create too much interference?

BI1KPO

BG2EFX When setting up a shortwave radio antenna outdoors, you don't need to worry too much about the thickness of the coaxial cable. A 50-ohm coaxial cable is sufficient. Even at the highest frequencies (around 10 meters), a cable length of 100 meters only results in a loss of around 7 dB. Using a 10-meter coaxial cable for outdoor antenna setups is perfectly adequate, with less than 1 dB of loss.

BI7CWS

As a newbie, I've been using the jyr four-band transceiver, and overall, I think it performs well. I was able to make several successful contacts with it just two days ago.

Carlos

BI7CWS Thank you. I will investigate this further, as it seems that the antenna requirements for tree-to-ground communication are quite high. What is the maximum distance achievable with 5W power in which frequency band?

BI7CWS

Carlos Actually, it was okay. I just found a random spot near the antenna that day, and there were quite a few trees nearby.😂
I'm operating from QTH in Changsha, Hunan, and I was able to make contacts on frequencies covering areas 3, 8, and 9.

Moonlight

Key conditions for enjoying wireless communication:
High power output, good antenna (full-size), and a favorable environment.
I had a great time playing three full-occupancy games.
The three players can play with two others, which is pretty good.
Three players can play together.
Three of them all together = disaster

Since you're already using QRP, it's best to choose a full-sized antenna (if portability is a concern, consider inverted V, regular V, or GP-fed antennas as well). However, I strongly advise against using an antenna with added capacitance (which shortens its length), as QRP with a capacitive antenna can easily lead to frustration and missed contacts.

Ariel

Moonlight

A fake "Administration for Industry and Commerce" that didn't issue you a license.~~You have the following three options that can reduce by -5000:~~

Adhgk

I think the end-fed and GP antennas are quite suitable, unlike the direct V and Yagi antennas which require a support pole. As for QRP, I can only say that it's no different than winning a lottery. I recommend finding a better electromagnetic environment; this is very important.

BG2EFX

BI1KPO
50-5 is sufficient; this is essentially the standard configuration.
It's just a friendly reminder, after all, I've seen people use 10m 50-1.5m lines, and they even made sure to wind them up neatly on a spool, with the main focus being "easy storage."

BH4GDU

I use the Diamond RMH12 + X50 combination. The X50 is used with the Diamond tripod and support pole. Sometimes, I don't bother to detach the X50; instead, both the X50 and RMH12 are mounted on the same support pole. The RMH12 is attached using the three-legged component, while the X50 is secured as described in the instructions.

I can't install an antenna at home, so I have to use this temporary setup instead.

BI1KPO

BG2EFX 50-1.5... is due to my limited experience.😅

BH3XZT

The feeder cable section can be chosen from: RG-174
For the antenna part, my own solution is the "Little Sausage Antenna" (with the author's support).💡I sent two options, both of which can be placed in the iCOM package.

Of course, I also have GP-type antennas, but they are not very portable and are subject to significant restrictions due to the environment.

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