[Elecraft] Beware! (Learn by doing?) :-)))

[Don Wilhelm]

Simon,

I certainly don't doubt your word, but I wonder how the TS-480SAT does 
that - it must reduce the gain somehow.  I have been using and building 
receivers since the mid 1950s and in all cases, turning off the AGC will 
increase the audio in the receiver - that is true UNLESS there are NO 
signals at the input strong enough to activate the AGC.  The K3 shows no 
change in the audio level when connected to a dummy load and the AGC is 
changed from on to off.

If there are signals that are being received and the AGC is holding down 
the gain of the receiver to compensate for those strong signals, then 
turning off that gain control mechanism would normally result in an 
increase in the audio level.  If it does not, then that receiver used 
some mechanism other than the AGC to reduce the gain when AGC is off (I 
would not want my receiver to do that).  Normally the increase in audio 
will depend on just how strong the strongest signal in the passband 
actually is.

73,
Don W3FPR

Simon (HB9DRV) wrote:
> ----- Original Message ----- 
> From: "Don Wilhelm" <w3fpr at embarqmail.com>
>
>   
>> ...other transceivers may allow AGC off, but 
>> those I have encountered recently, except for the K2 and K3, do not.
>>     
>
> TS-480SAT, no real change in audio level when AGC is off.
>
> Simon Brown, HB9DRV
> www.ham-radio-deluxe.com
>   
>