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Hello Andy,
Some interesting findings. What would be more interesting would be to
find a direct replacement for the mics, specifically a part number.
Although not sure how hard it would be to replace it on some of the
radios.
Of course still looking for some information about the? Explorer QRZ-1
radio. Looks like I will purchase one tomorrow to find out how it
does.
Mick - W7CAT
----- Original Message -----
From: "wj9jrg via groups.io"
To: [email protected]
Sent: Sunday, May 18, 2025 07:08:04 AM
Subject: Re: [repeater-builder] Explorer QRZ-1 Radio

So I did some comparisons across several china radios, specifically a WLN,
a UV6R and a UV5. Goal was to make transmit audio some louder.
What I found is that by injecting audio directly into the mic connection, I
could achieve > 5khz deviation. But with the same condenser mic, I could
not.
In one case on the WLN, I messed up the condenser mic. I took a different
one off a voice recorder playback module that I had lying around, and after
replacing on this same radio, where I averaged about 2-3 kc deviation, it
was now 4-5+ KC.
So what may be happening is that they have poor quality of condenser mics,
and they set gain and deviation for best case being at 5KC. What else
could you do trying to make a $10 radio?
Andy
On Sat, May 17, 2025 at 10:10?PM Teton Amateur Radio Repeater Association
(TARRA) via groups.io wrote:

Hello Terry,

"mic gain too low" I guess that means there is a deviation adjustment?

The boothingys are just too low on the deviation and can't do anything
with them so they come up to where they need to be. I have never had one
that I tried that had enough level, new hams aside, I am going from what
I have checked myself.

Like I had said "I hate to suggest to the new hams to buy a radio that
doesn't meet specs and then tell them they can't use them." Sounds like
this radio may have promise. Wish I had one to try first. I suppose that
I could buy one and if it isn't any good, send it back.

Since nothing is going happen before Monday any way, maybe there will be
some other reports when people get back from the Dayton Hamvention.

Thank you for your information.

Mick - W7CAT

----- Original Message -----
From: "terry dalpoas via groups.io"
To: [email protected]
Sent: Saturday, May 17, 2025 07:54:12 PM
Subject: Re: [repeater-builder] Explorer QRZ-1 Radio

I am not a fan of the cheap Chinese radios by any means. I like my

Motorola, Kenwood, Icom, Yaesu/Vertex commercial and amateur grade gear.
That being said, another local ham and I each have the TYT-UV88, which I
believe that Explorer radio is just a rebadged version of. We've had
good results with them and they've looked good on a service monitor. In
fact I was using that UV88 earlier today. Several of us are also using
the Quansheng K6's with Egzumer and F4HWN firmware with very good results.

The biggest issue I've run across audio-wise with new hams and those

radios are they are too far away from the mic, talking too softly, mic
gain too low, running narrowband on a wideband repeater, or any
combination of those. I helped a newer ham earlier today that had low
audio. After walking him through a few things, he found out that he had
the mic gain too low and was on narrowband. He corrected those issues
and was good afterward.

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