[Elecraft] OT: QST's review of the Yaesu FTDX5000MP

[Joe Subich, W4TV]

>> That makes absolutely no sense to me. Can you or anyone else here
>> well versed in radio design please explain to me why the Kenwood
>> engineers would do this?

The best guess is that Kenwood did not want to invest in 1) the high
performance front end (bandpass) filters for the non-amateur bands,
2) quality 6 KHz and 15 KHz (low frequency) IF filters, 3) give up
coverage +/- 500 KHz of the "first" IF, and 4) their unlocked DDS
synthesizer would not work above 33 MHZ (limiting down conversion
to a maximum frequency of 22 MHz).

Very bad design with slick marketing.

73,

    ... Joe, W4TV


On 11/15/2010 4:38 PM, k2qi.nyc at gmail.com wrote:
> That makes absolutely no sense to me. Can you or anyone else here well versed in radio design please explain to me why the Kenwood engineers would do this?
>
> Tnx,
> James K2QI
> ------Original Message------
> From: Larry Phipps
> To: James Sarte
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] OT: QST's review of the Yaesu FTDX5000MP
> Sent: Nov 15, 2010 15:50
>
>    'Yup, as far as I can tell, and also for any BW on 12, 10 or 6m.
>
> Larry N8LP
>
>
> On 11/15/2010 3:33 PM, James Sarte wrote:
>> This is one thing I don't understand with the TS-590s:
>>
>> "For 1.8/3.5/7/14/21MHz amateur bands, when receiving in CW/FSK/SSB
>> modes down conversion is selected automatically if the final passband
>> is 2.7kHz or less"
>>
>> So does that mean if the passband selected is greater than 2700 Hz,
>> the receiver switches to upconversion?!?
>>
>> James K2QI
>>
>> On Mon, Nov 15, 2010 at 3:23 PM, N8LP<n8lp at telepostinc.com
>> <mailto:n8lp at telepostinc.com>>  wrote:
>>
>>
>>      The panadapter limitations are easily taken care of with a 3rd party
>>      panadapter. FT5K versions are among the top 4 selling versions of
>>      LP-PAN.
>>      They were smart enough to include a built in IF output. More than
>>      I can say
>>      for Kenwood, who not only didn't provide an IF output jack on
>>      their latest
>>      offering, but came up with perhaps the goofiest conversion scheme
>>      I have
>>      seen in a long time.
>>
>>      Larry N8LP
>>
>>
>>
>
>
>
> Sent via BlackBerry from T-Mobile
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