[TenTec] C22

[Dukes HiFi]

I myself could have been a bit more tactful as well. 

However, direct conversion has so many adverse artifacts that it makes me cringe to think of using it. The C21 is quite a lot better, IMHO than is a true “direct conversion” design.

The new SDR direct conversion process is a different matter with different issues, some good, some not good. But at least they don’t suffer from arbitrary sideband, hum and adjacent frequency overload (unless you send the A to D into overflow).

73

Gary



> On Dec 30, 2017, at 1:24 PM, Lee <lee at wa3fiy.com> wrote:
> 
> Yes, both Century 21 and 22 hear both sidebands all the time.....just LIKE a simple direct conversion receiver.  Granted, the conversion details of both radios differ from a simple direct conversion receiver.
> 
> I may have started this discussion when I said "...It tunes just like a direct conversion receiver where you hear both sidebands as you tune thru the signal...." in response to the original question.  Emphasis maybe should have been put on the words "TUNES JUST LIKE".  Sorry, I should have been more clear I guess.   :-)
> 
> HNY everyone,
> 
> 73,
> 
> -Lee-
> WA3FIY
> 
> 
> ------ Original Message ------
> From: "w0ep" <w0ep at w0ep.us>
> To: tentec at contesting.com
> Sent: 12/30/2017 1:56:17 PM
> Subject: Re: [TenTec] C22
> 
>> 
>> I must be misunderstanding..
>> 
>> My C21 hears both sidebands all the time.
>> 
>> 
>> On 12/29/2017 10:47 PM, Dukes HiFi wrote:
>>> 
>>> Its advantage over direct conversion is freedom from hum and images (wrong sideband).
>>> 
>> 
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