Search found 938 matches
- Thu Mar 07, 2024 10:34 am
- Forum: TYT MD-9600 / Retevis RT-90
- Topic: MD-9600/RT-90 Schematic
- Replies: 3
- Views: 2090
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 ...
- 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: 1863
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...
- 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: 1863
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.
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.
- 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: 1863
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...
- 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: 961
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
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
- 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: 2372
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 ...
- Tue Feb 27, 2024 11:28 am
- Forum: General discussions
- Topic: opengd not have 62.5 tone
- Replies: 3
- Views: 2024
Re: opengd not have 62.5 tone
62.5Hz is not a standard tone.
The lowest tone in the standard list is 67.0Hz.
The lowest tone in the standard list is 67.0Hz.
- Thu Feb 22, 2024 12:19 am
- Forum: TYT MD-9600 / Retevis RT-90
- Topic: Voltage Oddity
- Replies: 21
- Views: 4622
Re: Voltage Oddity
OK, it was just a thought.
Colin G4EML
Colin G4EML
- Wed Feb 21, 2024 11:56 pm
- Forum: TYT MD-9600 / Retevis RT-90
- Topic: Voltage Oddity
- Replies: 21
- Views: 4622
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.
- Wed Feb 21, 2024 8:51 pm
- Forum: TYT MD-9600 / Retevis RT-90
- Topic: Voltage Oddity
- Replies: 21
- Views: 4622
Re: Voltage Oddity
Sounds like one of two things,
Your power supply can't provide enough current. It needs to be able to provide at least 10 Amps. The current on UHF is often higher than VHF.
RF is getting into the power supply and causing it to shut down. How close is your antenna?
Colin G4EML
Your power supply can't provide enough current. It needs to be able to provide at least 10 Amps. The current on UHF is often higher than VHF.
RF is getting into the power supply and causing it to shut down. How close is your antenna?
Colin G4EML