Search found 7486 matches

by VK3KYY
Sat May 16, 2020 6:04 am
Forum: General discussions
Topic: Calibrating Power?
Replies: 8
Views: 6541

Re: Calibrating Power?

Its simple. 1.Connect the USB cable to the radio 2.Run the CPS 3.Open the Calibration screen and read the data from the radio 4.Set the radio to 1W. 5.Measure the power, and adjust the 1W (Low power) power number for the frequency you are transmitting on. If the power is too low, increase the number...
by VK3KYY
Sat May 16, 2020 5:55 am
Forum: Hotspot mode
Topic: [MMDVMHost] Hotspot output power setting.
Replies: 20
Views: 20776

Re: [MMDVMHost] Hotspot output power setting.

It would be possible to build a meter which automatically synchronises with the DMR signal, but it seems pointless unless its absolutely impossible for the radio to transmit just a carrier, or FM etc
by VK3KYY
Sat May 16, 2020 3:38 am
Forum: Hotspot mode
Topic: [MMDVMHost] Hotspot output power setting.
Replies: 20
Views: 20776

Re: [MMDVMHost] Hotspot output power setting.

I don't know if a DMR power meter actually exists.

I discussed this with a technician who repairs Motorola DMR radios, and the radios have a special "Test" mode where they transmit a carrier with no DMR pulses etc, so that the technician can test the power output
by VK3KYY
Fri May 15, 2020 10:00 pm
Forum: Hotspot mode
Topic: [MMDVMHost] Hotspot output power setting.
Replies: 20
Views: 20776

Re: [MMDVMHost] Hotspot output power setting.

Ok. I have a cheap digital SWR / Power meter. I it just has one big red button on the front and a LCD display. I don’t know how accurate it is, but it’s good enough for the use it put it to. BTW. The MMDVM Jumbospot hotspots are extremely insensitive. I investigated the cause of the insensitivity a ...
by VK3KYY
Fri May 15, 2020 1:24 am
Forum: Hotspot mode
Topic: [MMDVMHost] Hotspot output power setting.
Replies: 20
Views: 20776

Re: [MMDVMHost] Hotspot output power setting.

I've finally remembered to update the User Guide, so that it now includes the table supplied by Daniel Awesome! Thank you! I've actually found that 50mW covers me for about 100 feet at the house here, which is interesting, because the radio itself at 50mW I could barely get into my hotspot. Did you...
by VK3KYY
Thu May 14, 2020 11:07 pm
Forum: Hotspot mode
Topic: [MMDVMHost] Hotspot output power setting.
Replies: 20
Views: 20776

Re: [MMDVMHost] Hotspot output power setting.

I've finally remembered to update the User Guide, so that it now includes the table supplied by Daniel
by VK3KYY
Wed May 13, 2020 8:57 pm
Forum: Hotspot mode
Topic: [MMDVMHost] Hotspot output power setting.
Replies: 20
Views: 20776

Re: [MMDVMHost] Hotspot output power setting.

kt4lh wrote:
Wed May 13, 2020 5:30 pm
Excellent! Can this get into the manual too? I think it'll help out a lot.

Yes.

I will put it in the User Guide
by VK3KYY
Wed May 13, 2020 9:56 am
Forum: Hotspot mode
Topic: Is there a guide to setting up hotspot mode?
Replies: 9
Views: 7030

Re: Is there a guide to setting up hotspot mode?

Dave One problem which a lot of people come across is RF injection into the USB cable and possibly the RPi power. Generally you need to run the hotspot to an external antenna so that you don't have loads of RF in the shack. Also you may need to put RF chokes on the USB cable and anywhere else where ...
by VK3KYY
Wed May 13, 2020 9:52 am
Forum: General discussions
Topic: Ailunce HD1
Replies: 37
Views: 17788

Re: Ailunce HD1

OK.

In that case its design is probably based on analysis the DM-5R
by VK3KYY
Wed May 13, 2020 1:48 am
Forum: General discussions
Topic: Ailunce HD1
Replies: 37
Views: 17788

Ailunce HD1

FYI

I was just sent a schematic for a Ailunce HD1 and it the hardware appears to be very similar to the RD-5R

As Retrevis sell the Ailunce HD1, and Retrevis are just a rebranding company like Radioddity, I presume this radio is probably a rebranded Baofeng, or possibly a rebranded TYT radio?