[Alexandria Radio Club Reflector] FM amplifiers

[Lane Thurmond]

I have one for GMRS. Works well..
73LaneK4QFS 

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  On Fri, May 24, 2024 at 15:37, Ian<iann8ik at gmail.com> wrote:   Interesting that BTECH figured out how to keep up with the 30ms switching!


On Fri, May 24, 2024 at 3:08 PM Joe Porcelli <porcej at gmail.com> wrote:

> Howdy,
>
> The BTECH digital amplifiers do work well for DMR. I have been using them
> for DMR on both VHF and UHF.  I also use them extensively for high speed
> packet modes such as New Packet Radio.  They can handle a heavier duty
> cycle than their non-digital counterparts.  The amplifiers have a VOX mode
> (carrier detect) as well as a keying mode, where the microphone is plugged
> into the amplifier and the amplifier is plugged into the radio.  If you do
> get one, be careful not to overdrive the amplifiers.
>
> Cheers,
> Joe, KT3I
>
> On Fri, May 24, 2024 at 2:30 PM Ian <iann8ik at gmail.com> wrote:
>
>> With the departure of MFJ from the ham market, Mirage amplifiers may no
>> longer be an option.  Howie WA9HS found this 220 MHz amp for a good price:
>>
>> https://www.amazon.com/BTECH-AMP-220-Amplifier-220-225MHz-Compatible/dp/B07B35QVP4/
>> .
>> Nice way to boost a Kenwood D74/D75 or other 220-capable handheld.
>> Notice on that page that BTECH offers a 'digital' version for VHF or UHF
>> for more dollars.  Not sure what the 'digital' gets you because a Mirage
>> FM
>> amp passes DSTAR and C4FM signals just fine - been there, done that.  But
>> it's safe to assume that 'digital' does NOT mean DMR-compatible.  Outboard
>> amplifiers do not work with DMR radios because of the 30ms time slotting
>> inherent in DMR.  The PIN diodes in the amp would not last long trying to
>> keep up with DMR.
>>
>> 73, Ian N8IK
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