Search found 90 matches

by KA1CM
Tue May 07, 2024 12:42 pm
Forum: GD-77 / DM-1801 / RD-5R / GD-77S
Topic: RD-5R Power Calibration
Replies: 7
Views: 338

Re: RD-5R Power Calibration

It may be that your radio cannot go lower than 1W. Individual radios vary greatly so that is a possibility. You can check by going to the 1W Calibration and reducing the adjust level to zero. That is the lowest power that can be achieved. Also to calibrate correctly you should do at least three adj...
by KA1CM
Tue May 07, 2024 12:34 pm
Forum: GD-77 / DM-1801 / RD-5R / GD-77S
Topic: RD-5R Power Calibration
Replies: 7
Views: 338

Re: RD-5R Power Calibration

F1RMB wrote:
Tue May 07, 2024 9:19 am
One question, as I don't know this meter, is it capable to display accurate values below 1W ?
That might be the problem. The specification said 0.1-120w, but I don't really know. Do you have recommend meter? Something below $100? Digital preferred, but analog is ok.
by KA1CM
Mon May 06, 2024 11:36 pm
Forum: GD-77 / DM-1801 / RD-5R / GD-77S
Topic: RD-5R Power Calibration
Replies: 7
Views: 338

Re: RD-5R Power Calibration

Hi Daniel,

I'm trying to calibrate the power output, but after calibration I can't go under 1 watt. Seems like the radio can do lowest at 1 watt no matter if I set it to 0.75/0.5/0.25/ or 0.05 Watt. Please have a look at the video.


youtu.be/EFUyhCYfpeU
by KA1CM
Mon May 06, 2024 5:28 pm
Forum: GD-77 / DM-1801 / RD-5R / GD-77S
Topic: RD-5R Power Calibration
Replies: 7
Views: 338

RD-5R Power Calibration

Hi All, I'm trying to calibrate the power output of my RD-5R. I've read through the manual and found this. The power level for a given user setting value, varies considerably from radio to radio and will vary depending on battery voltage and transmit frequency. The power level will also vary dependi...
by KA1CM
Sun May 05, 2024 3:23 pm
Forum: GD-77 / DM-1801 / RD-5R / GD-77S
Topic: Looking for a RD5R
Replies: 65
Views: 13334

Re: Looking for a RD5R

You’re very welcome. Have fun with your new toys and have a safe trip to Montana.
by KA1CM
Sat May 04, 2024 4:36 pm
Forum: TYT MD-UV380/390 / UV380/390 Plus 10W / Retevis RT-3S / Baofeng DM-1701 / DM-1701B / Retevis RT-84
Topic: Can't download firmware to a TYT MD-UV390 GPS
Replies: 8
Views: 845

Re: Can't download firmware to a TYT MD-UV390 GPS

TNX OM (don't see ur name) I was following the method posted by VK3NYY so I just downloaded every thing today CPS Vers. is: R2024.04.30.01 Donor file is: MD9600-CSV(2571V5)-V26.45.bin (I also tried a copy of ur file same result) I appreciate the help. But Maybe I have some probs in the HT???? 73s D...
by KA1CM
Fri May 03, 2024 12:38 pm
Forum: General discussions
Topic: RD-5R won't talk to hotspot, what have I done wrong?
Replies: 7
Views: 373

Re: RD-5R won't talk to hotspot, what have I done wrong?

Thank you Colin, Daniel, and Lars. It is working now. however, all of my radio are about 300Hz to the right of the center (+300Hz) and the RD-5R in the problem was 150Hz to the left (-150Hz). I calibrated the -150Hz one to +250 for now to make everything work. Now, I’m up on a new quest. I don’t kno...
by KA1CM
Wed May 01, 2024 11:23 pm
Forum: General discussions
Topic: RD-5R won't talk to hotspot, what have I done wrong?
Replies: 7
Views: 373

Re: RD-5R won't talk to hotspot, what have I done wrong?

It may be that your two radios are on very slightly different frequencies. Most hotspots are excessively fussy about frequency. Do you have a means of comparing the transmit frequency of the two radios? A radio or SDR with a spectrum display would show the difference. You could then use the OpenGD7...
by KA1CM
Wed May 01, 2024 12:53 pm
Forum: General discussions
Topic: RD-5R won't talk to hotspot, what have I done wrong?
Replies: 7
Views: 373

RD-5R won't talk to hotspot, what have I done wrong?

Hi Everyone. I've encountered a weird problem, please have a look at the video. I have two RD-5R. The hotspot refuse to listen to the one on the left. I've check frequency, color code, and DMRID on the left radio, everything seems correct. I don't know what to do next. 73, Charlie. P.S. the synchron...
by KA1CM
Mon Apr 29, 2024 12:26 pm
Forum: CPS
Topic: Radio Type in CPS???
Replies: 0
Views: 374

Radio Type in CPS???

Hi All, I have both RT3S and RD-5R. Every time, before I connect the radio to the computer I will make sure the radio type is set correctly. My question is, what is it for? What if one day I forgot to change it? What exactly does it effect, only firmware loader? codeplug? or everything? Thank you, C...