[chirp_users] KT-8900R

[Nigel Johnson]

I spoke to an engineer from one of the big three manufacturers at Dayton
one year, and he told me that the reason 220 is often blocked in dual
band radios is that it is difficult to filter out unwanted signals when
bands are close together as 2m and 220MHz are.  One of their radios
could be 'opened up' to use 220, but the 1-2 watts that it apparently
put out on 220 was actually going out out on other frequencies!

In other words, don't do it unless you want a heap of trouble.

73 de Nigel ve3id

 

-- 
Nigel Johnson
MSc., MIEEE
VE3ID/G4AJQ/VA3MCU

Amateur Radio, the origin of the open-source concept!

http://nigel.homelinux.net
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On 07/15/2016 11:06 AM, Pavel Milanes (CO7WT) wrote:
> Hi Marc,
> My experience and test as the main developer of the driver for this 
> radio in the interaction with other users:
>
> 1 - The band limits are encoded in a high mem area with READ ONLY 
> attribute, any attempt to write to it and the radio will reset taking 
> itself out of the cloning mode.
>
> 2 - One user managed to get it down (you will need pro equipment and 
> soft skill to do that) and the reception was poor in 220 Mhz and the TX 
> on the high setting results on a lot of heat and only 1 or 2 watts of 
> output.
>
> Aka: it's technically difficult mod it in software and the hardware part 
> is not prepared to manage the 222 Mhz band with the power dissipated as 
> heat and final blowing is a high change in this situation.
>
> My advice: sold it and get a BTECH UV5001+220 instead.
>
> 73 Pavel CO7WT.
>
> El 13/07/16 a las 17:19, Marc via chirp_users escribió:
>> I see that this radio is supported and would like to know if anyone has any experience with it?
>>
>> Will CHIRP allow permanent modifications to the band edge limits, particularly 220, as the radio is shipped 240-260 MHz?
>>
>> Will the radio operate with 220 in one VFO and 440 in the other?
>>
>> Thanks,
>>
>> Marc
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>> This message was sent to M.Sc. Pavel Milanes Costa at pavelmc at gmail.com
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>>