|
Greetings;
?
I bought a UV-25 from an Ebay store, and the radios receiver was Insensitive, it receives poorly.? ?
?
After complaining, the Ebay seller sent me another radio.? ?It turns out that both radios receivers are insensitive.??
?
Using a TinyVNA's signal generator, through a switched step attenuator, the full quieting receive level is approximately -90dBm on 146, 440 MHz + WX channels.? ? This level equates to approx. 6uV, or S6.? ? ?VNA's signal generator sends a quiet carrier, no modulation.
?
Using the same testing method on my other handy talkies, I achieve full quieting at -115 to -120 dBm.? ? ? ? ? Note:? I used my Rigol Spec Analyzer to verify that my test signals are accurate +/- 1dB.??
?
Searching Google and Youtube for help- I find Zilch.? ?Could there an option that I don't understand the meaning of that could be set wrong?? ? ?Any help is much appreciated.
?
Thanks in Advance.
--
73,
Ricky? ?
Ammon, ID
|
Have you considered a ba lot of radios, possibly?
Get BlueMail for Android
On Jul 18, 2024, at 13:03, Richard Patrick < 599kr7w@...> wrote:
Greetings;
?
I bought a UV-25 from an Ebay store, and the radios receiver was Insensitive, it receives poorly.? ?
?
After complaining, the Ebay seller sent me another radio.? ?It turns out that both radios receivers are insensitive.??
?
Using a TinyVNA's signal generator, through a switched step attenuator, the full quieting receive level is approximately -90dBm on 146, 440 MHz + WX channels.? ? This level equates to approx. 6uV, or S6.? ? ?VNA's signal generator sends a quiet carrier, no modulation.
?
Using the same testing method on my other handy talkies, I achieve full quieting at -115 to -120 dBm.? ? ? ? ? Note:? I used my Rigol Spec Analyzer to verify that my test signals are accurate +/- 1dB.??
?
Searching Google and Youtube for help- I find Zilch.? ?Could there an option that I don't understand the meaning of that could be set wrong?? ? ?Any help is much appreciated.
?
Thanks in Advance.
--
73,
Ricky? ?
Ammon, ID
|
That was supposed to be bad.
Get
Have you considered a ba lot of radios, possibly?
Get BlueMail for Android
On Jul 18, 2024, at 13:03, Richard Patrick < 599kr7w@...> wrote:
Greetings;
?
I bought a UV-25 from an Ebay store, and the radios receiver was Insensitive, it receives poorly.? ?
?
After complaining, the Ebay seller sent me another radio.? ?It turns out that both radios receivers are insensitive.??
?
Using a TinyVNA's signal generator, through a switched step attenuator, the full quieting receive level is approximately -90dBm on 146, 440 MHz + WX channels.? ? This level equates to approx. 6uV, or S6.? ? ?VNA's signal generator sends a quiet carrier, no modulation.
?
Using the same testing method on my other handy talkies, I achieve full quieting at -115 to -120 dBm.? ? ? ? ? Note:? I used my Rigol Spec Analyzer to verify that my test signals are accurate +/- 1dB.??
?
Searching Google and Youtube for help- I find Zilch.? ?Could there an option that I don't understand the meaning of that could be set wrong?? ? ?Any help is much appreciated.
?
Thanks in Advance.
--
73,
Ricky? ?
Ammon, ID
|
Do you have your squelch open?
?
JohnT
|
On 7/18/24 10:52, Richard Patrick via groups.io wrote:
Greetings;
I bought a UV-25 from an Ebay store, and the radios receiver
was Insensitive, it receives poorly.? ?
...
Buying from such a source is ill-advised. As I understand it,
Baofeng has good QC, and radios that don't pass the final test get
onto a shrink-wrapped pallet and auctioned to the highest bidder,?
rather than repaired to specifications. Those are the radios that
are sold on eBay, which explains why you got a second one as a
replacement.
Choose a vendor who buys the radios that pass QC, such as
... it's worth the money.
|
Does Amazon tend to have better radios?
73 John AF5CC
toggle quoted message
Show quoted text
On 7/18/24 10:52, Richard Patrick via groups.io wrote: Greetings;
I bought a UV-25 from an Ebay store, and the radios receiver
was Insensitive, it receives poorly.? ?
...
Buying from such a source is ill-advised. As I understand it,
Baofeng has good QC, and radios that don't pass the final test get
onto a shrink-wrapped pallet and auctioned to the highest bidder,?
rather than repaired to specifications. Those are the radios that
are sold on eBay, which explains why you got a second one as a
replacement. Choose a vendor who buys the radios that pass QC, such as ... it's worth the money.
|
On 7/18/24 13:02, John Geiger AF5CC via groups.io wrote:
Does Amazon tend to have better radios?
I don't know.
|
At least with Amazon it is an easy return, at least if you are a Prime member.
toggle quoted message
Show quoted text
On 7/18/24 13:02, John Geiger AF5CC via groups.io wrote: Does Amazon tend to have better radios?
I don't know.
|
Hello Ricky,
Baofengs since they are built to a price (low price) do not perform like others in the marketplace. You get what you pay for. It is well known that Baofengs are unsensitive, unselective and their transmitters are dirty as their harmonics are way too high.
Because of this, they are totally banned in some countries and here in Australia, amateurs are the only people who are allowed to use them, since we are allowed to design and build our own radios.
If you want a radio that should perform to spec, spend a few more dollars and buy a more reputable brand.
toggle quoted message
Show quoted text
Greetings;
?
I bought a UV-25 from an Ebay store, and the radios receiver was Insensitive, it receives poorly.? ?
?
After complaining, the Ebay seller sent me another radio.? ?It turns out that both radios receivers are insensitive.??
?
Using a TinyVNA's signal generator, through a switched step attenuator, the full quieting receive level is approximately -90dBm on 146, 440 MHz + WX channels.? ? This level equates to approx. 6uV, or S6.? ? ?VNA's signal generator sends a quiet carrier,
no modulation.
?
Using the same testing method on my other handy talkies, I achieve full quieting at -115 to -120 dBm.? ? ? ? ? Note:? I used my Rigol Spec Analyzer to verify that my test signals are accurate +/- 1dB.??
?
Searching Google and Youtube for help- I find Zilch.? ?Could there an option that I don't understand the meaning of that could be set wrong?? ? ?Any help is much appreciated.
?
Thanks in Advance.
--
73,
Ricky? ?
Ammon, ID
|
I have had a couple of Baofengs which were plenty sensitive, in that they hear the FM satellites as well as any other radio I have had.
In any model there will be some failures. But that doesn't mean the whole line is bad
73 John AF5CC?
---- On Thu, 18 Jul 2024 18:58:10 -0500 vk2xlj@... wrote ----
toggle quoted message
Show quoted text
Hello Ricky,
Baofengs since they are built to a price (low price) do not perform like others in the marketplace. You get what you pay for. It is well known that Baofengs are unsensitive, unselective and their transmitters are dirty as their harmonics are way too high.
Because of this, they are totally banned in some countries and here in Australia, amateurs are the only people who are allowed to use them, since we are allowed to design and build our own radios.
If you want a radio that should perform to spec, spend a few more dollars and buy a more reputable brand.
Greetings;
?
I bought a UV-25 from an Ebay store, and the radios receiver was Insensitive, it receives poorly.? ?
?
After complaining, the Ebay seller sent me another radio.? ?It turns out that both radios receivers are insensitive.??
?
Using a TinyVNA's signal generator, through a switched step attenuator, the full quieting receive level is approximately -90dBm on 146, 440 MHz + WX channels.? ? This level equates to approx. 6uV, or S6.? ? ?VNA's signal generator sends a quiet carrier,
no modulation.
?
Using the same testing method on my other handy talkies, I achieve full quieting at -115 to -120 dBm.? ? ? ? ? Note:? I used my Rigol Spec Analyzer to verify that my test signals are accurate +/- 1dB.??
?
Searching Google and Youtube for help- I find Zilch.? ?Could there an option that I don't understand the meaning of that could be set wrong?? ? ?Any help is much appreciated.
?
Thanks in Advance.
--
73,
Ricky? ?
Ammon, ID
|
I think Doug just misspelled "selective" wrt UV5R variants.
On 7/18/24 17:39, John Geiger AF5CC via
groups.io wrote:
toggle quoted message
Show quoted text
I have had a couple of Baofengs which were plenty
sensitive, in that they hear the FM satellites as well as
any other radio I have had.
In any model there will be some failures.
But that doesn't mean the whole line is bad
73 John AF5CC?
---- On Thu, 18 Jul 2024 18:58:10 -0500
vk2xlj@... wrote ----
Hello Ricky,
Baofengs since they are built to a price (low price)
do not perform like others in the marketplace. You get
what you pay for. It is well known that Baofengs are
unsensitive, unselective and their transmitters are
dirty as their harmonics are way too high.
Because of this, they are totally banned in some
countries and here in Australia, amateurs are the only
people who are allowed to use them, since we are
allowed to design and build our own radios.
If you want a radio that should perform to spec, spend
a few more dollars and buy a more reputable brand.
Greetings;
?
I bought a UV-25 from an Ebay store, and the
radios receiver was Insensitive, it
receives poorly.? ?
?
After complaining, the Ebay seller sent me
another radio.? ?It turns out that both radios
receivers are insensitive.??
?
Using a TinyVNA's signal generator, through a
switched step attenuator, the full quieting receive
level is approximately -90dBm on 146, 440 MHz + WX
channels.? ? This level equates to approx. 6uV, or
S6.? ? ?VNA's signal generator sends a quiet
carrier, no modulation.
?
Using the same testing method on my other handy
talkies, I achieve full quieting at -115 to -120
dBm.? ? ? ? ? Note:? I used my Rigol Spec Analyzer
to verify that my test signals are accurate +/-
1dB.??
?
Searching Google and Youtube for help- I find
Zilch.? ?Could there an option that I don't
understand the meaning of that could be set wrong??
? ?Any help is much appreciated.
?
Thanks in Advance.
--
73,
Ricky? ?
Ammon, ID
|
Doug J