LU2FM
New Member
Posts: 29
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Post by LU2FM on Aug 1, 2020 21:36:43 GMT
I have tested the equipment in my car. The receiver sensitivity is much harder than other equipment. Will it be possible to adjust to make it more sensitive?. Really deaf
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Post by Daniel VA2DG on Aug 2, 2020 23:26:34 GMT
CDR-300UV
test conducted on Professional Test Monitor. By Carl VA2JMC and his friend Jonathan VA2LOJ
UHF tested on frequency 448.950
Low power 2.45 watt
High power 13.8 watt
it is still precise with only +76Hz too high
Sensitivity -122.5dbm
In VHF tested on frequency 146.145
Low power 2.65w
High power 13.8 watt
it is precise with only +19Hz too high
Sensitivity -123dbm
Instrument used for tests: IFR-2948, Communication Service Monitor
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Post by Daniel VA2DG on Aug 2, 2020 23:31:38 GMT
I have tested the equipment in my car. The receiver sensitivity is much harder than other equipment. Will it be possible to adjust to make it more sensitive?. Really deaf Analog or Digital? How far the Repeater? and what antenna type? |
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LU2FM
New Member
Posts: 29
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Post by LU2FM on Aug 3, 2020 0:53:33 GMT
I have tested the equipment in my car. The receiver sensitivity is much harder than other equipment. Will it be possible to adjust to make it more sensitive?. Really deaf Analog or Digital? How far the Repeater? and what antenna type? Digital Repeater. Double-band diamond antenna (always the same antenna). Compared to my Yaesu FTM-100, the difference is a lot. Listen much less. |
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Post by ha5cvz on Aug 26, 2020 13:45:05 GMT
The same problem, compared with TYT MD380 or GD-77, the difference is incomparable!, Rx=deaf.
Regarding the RF output power, instead of Lo:10W, Hi:20W as in product specification is reported, I have the same experience like Daniel.
Also reported to Kydera, they recomand to use the equipment @ 13,8V and all will be ok, stupid answer...
Vy 73, Miklos,
HA5CVZ.
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K6QYF
New Member
Posts: 29
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Post by K6QYF on Aug 26, 2020 16:22:58 GMT
Can't believe they would say something like that...input power is not going to make a difference. I have used the same radio on a regulated power supply (13.8 volts) and installed on the vehicle. SAME difference all the way around. You will never get the specified output on this radio. I would really like to know how they came up with 20w on high power...
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LU2FM
New Member
Posts: 29
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Post by LU2FM on Aug 26, 2020 18:47:42 GMT
The same problem, compared with TYT MD380 or GD-77, the difference is incomparable!, Rx=deaf. Regarding the RF output power, instead of Lo:10W, Hi:20W as in product specification is reported, I have the same experience like Daniel. Also reported to Kydera, they recomand to use the equipment @ 13,8V and all will be ok, stupid answer... Vy 73, Miklos, HA5CVZ. He really is deaf. I don't think it can be solved. Maybe a miracle will make her hear better  |
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Feb 6, 2021 21:20:56 GMT
The same problem, compared with TYT MD380 or GD-77, the difference is incomparable!, Rx=deaf. Regarding the RF output power, instead of Lo:10W, Hi:20W as in product specification is reported, I have the same experience like Daniel. Also reported to Kydera, they recomand to use the equipment @ 13,8V and all will be ok, stupid answer... Vy 73, Miklos, HA5CVZ. He really is deaf. I don't think it can be solved. Maybe a miracle will make her hear better John Miklor says it is very good www.miklor.com/COM/Review_RT73.php?fbclid=IwAR1RVph1ZF7bihD6IzNuka_17w7GX3EmPYko2_9qF2XZsKW13m1HsuPR-N0 |
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Post by Daniel VA2DG on Feb 6, 2021 21:35:23 GMT
Well i can tell you it is not deaf
during the January VHF Contest i did talk In simplex 146.55 with a bit of noise to a mobile 25km away from my QTH and CDR300UV was on a omni antenna at 50Ft so it is comparable to any other radio.
Firmware may have something to do with it.
Just stick with official firmware. There is too many that all over the place.
I always stick with Kydera official firmware.
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rudy
New Member
Posts: 49
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Post by rudy on Feb 16, 2021 15:35:54 GMT
sorry, sorry but I don't understand there are various comments and opposites!
but then in DMR, but above all in analog is fine or is she deaf?
PS in analogue under external antenna on the roof of the house in vhf, intermodule or does it receive well and without problems?
73
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