[1000mp] QST Product Reviews whitewash

Mon, 15 Apr 2002 15:00:11 -0400

Ed, 

It would be refreshing to see: "the transmit IMD of this product is 
simply not acceptable for a modern radio.  We would expect to see 
third order IMD results at least -36 dB and fifth order products  
at least -46 dB.  Any manufacturer that releases a product which 
fails to achieve that standard simply does not care about the 
amateur market!" 

It is time to call them as they are and clearly condemn sloppy 
designs.  If those who have the ability to accurately measure 
performance in their reviews would do so, we might see more 
attention to quality. 

73, 

   ... Joe, K4IK 

> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Hare,Ed, W1RFI
> Sent: Monday, April 15, 2002 1:10 PM
> To: '[email protected]'
> Subject: RE: [1000mp] QST Product Reviews whitewash
> 
> 
> The Review said:
> 
> "Unfortunately, one number we'd like to have seen change greately 
> in the IC-746PRO did not -- two-tone, third-order transmit IMD. 
> This number indicates whether the unit will generate undesireable 
> intermodulation products that can lead to splatter. On the worst-
> case band -- 10 meters in both cases -- third-order products were 
> down by about 23 dB in the original '746 and about 25 dB in the 
> 'PRO. In contrast, the IC-756PROIII's worst-case third-order 
> products were down 30 dB -- not terrific, but getting there. 
> The third order numbers were about the same on the worst-case 
> VHF band, 2 meters.
> 
> 