Search found 919 matches

by G4EML
Tue Mar 12, 2024 2:16 pm
Forum: TYT MD-9600 / Retevis RT-90
Topic: Retevis RT-90 Password in CPS
Replies: 5
Views: 250

Re: Retevis RT-90 Password in CPS

There is no keyboard reset.

The password bypass method is common to all TYT manufactured radios. The RT 90 is made by TYT.

Colin G4EML
by G4EML
Thu Mar 07, 2024 10:34 am
Forum: TYT MD-9600 / Retevis RT-90
Topic: MD-9600/RT-90 Schematic
Replies: 3
Views: 308

Re: MD-9600/RT-90 Schematic

They are holes! Because this is a schematic from a PCB design program you have to define everything that is connected together. The mounting holes have to be connected to ground. This is also a very early schematic for V2 radios. It will not be correct for later versions. However it is the only one ...
by G4EML
Wed Mar 06, 2024 10:32 pm
Forum: TYT MD-UV380/390 / UV380/390 Plus 10W / Retevis RT-3S / Baofeng DM-1701 / DM-1701B / Retevis RT-84
Topic: Wanted: UV380/390 , DM-1701/RT-84 power calibration testers
Replies: 10
Views: 1101

Re: Wanted: UV380/390 , DM-1701/RT-84 power calibration testers

To get 5W output you do need a fully charged battery or an external power supply and a very short good quality connecting cable. Roger, Power adjustment is well known for being difficult. It depends so much on the test cables, dummy load match and supply voltage that I doubt they have very tight tol...
by G4EML
Wed Mar 06, 2024 8:58 pm
Forum: TYT MD-UV380/390 / UV380/390 Plus 10W / Retevis RT-3S / Baofeng DM-1701 / DM-1701B / Retevis RT-84
Topic: Wanted: UV380/390 , DM-1701/RT-84 power calibration testers
Replies: 10
Views: 1101

Re: Wanted: UV380/390 , DM-1701/RT-84 power calibration testers

Hi Roger,

Yes I did the SK1/SK2 reset on both radios.

Cheap RF devices probably vary greatly in performance between batches. They may even be using whatever transistor is cheapest at the time.

I think it is unlikely you will find a good compromise for the calibration in all radios.

Colin.
by G4EML
Wed Mar 06, 2024 4:18 pm
Forum: TYT MD-UV380/390 / UV380/390 Plus 10W / Retevis RT-3S / Baofeng DM-1701 / DM-1701B / Retevis RT-84
Topic: Wanted: UV380/390 , DM-1701/RT-84 power calibration testers
Replies: 10
Views: 1101

Re: Wanted: UV380/390 , DM-1701/RT-84 power calibration testers

Hi Roger, Here are the readings from my two radios using the Marconi 2955. MDUV380 145MHz 103, 121, 162 1.16, 2.21, 5.40 73, 100, 118, 158 430MHz 79, 102, 154 1.51, 2.74, 5.80 44, 69, 89, 141 440MHz 81, 105, 153 1.49, 2.74, 5.60 42, 70, 92, 143 450MHz 84, 107, 156 1.53, 2.65, 5.70 43, 72, 95, 145 MD...
by G4EML
Tue Mar 05, 2024 12:10 am
Forum: TYT MD-UV380/390 / UV380/390 Plus 10W / Retevis RT-3S / Baofeng DM-1701 / DM-1701B / Retevis RT-84
Topic: contacts
Replies: 4
Views: 518

Re: contacts

That depends on exactly what you mean by contacts.

The radio will hold 1024 contacts to be used for making calls, such as talkgroups and friends private IDs.

It can also hold the entire world database of DMR IDs, used to display the call sign and name for an incoming call.

Colin G4EML
by G4EML
Wed Feb 28, 2024 9:51 am
Forum: TYT MD-UV380/390 / UV380/390 Plus 10W / Retevis RT-3S / Baofeng DM-1701 / DM-1701B / Retevis RT-84
Topic: Baofeng US DM-1701 Sale $69.99, free shipping
Replies: 15
Views: 1558

Re: Baofeng US DM-1701 Sale $69.99, free shipping

Yes, there are often multiple options for what you are buying, sometimes under the misleading title of 'Colour'. You need to double check exactly what you are ordering. The default setting is often the cheapest item which may well be just an accessory and not the item you thought. The actual buying ...
by G4EML
Tue Feb 27, 2024 11:28 am
Forum: General discussions
Topic: opengd not have 62.5 tone
Replies: 3
Views: 268

Re: opengd not have 62.5 tone

62.5Hz is not a standard tone.
The lowest tone in the standard list is 67.0Hz.
by G4EML
Thu Feb 22, 2024 12:19 am
Forum: TYT MD-9600 / Retevis RT-90
Topic: Voltage Oddity
Replies: 21
Views: 970

Re: Voltage Oddity

OK, it was just a thought.

Colin G4EML
by G4EML
Wed Feb 21, 2024 11:56 pm
Forum: TYT MD-9600 / Retevis RT-90
Topic: Voltage Oddity
Replies: 21
Views: 970

Re: Voltage Oddity

Have you done a power recalibration at any time? If you have then you may have set the UHF drive level too high in an attempt to get maximum output power.