[Elecraft] Compare: K3 to Collins S-line receiver

[Ronnie Hull]

Just so happens I’m in the market for a 75S3B if anyone has a clean operational unit for sale

W5SUM  

Sent from my iPhone

> On Jun 4, 2018, at 2:03 PM, Joe Subich, W4TV <lists at subich.com> wrote:
> 
>> On 2018-06-04 10:43 AM, Joseph Trombino, Jr wrote:
>> I gotta admit that the tube audio was much more pleasant to listen
>> to as compared to the solid state rigs.
> 
> The tube receivers had audio output stages capable of several (> 10)
> watts output - typically run in class A or AB.  Modern solid state
> receivers are generally more limited in output (the K3 output amp
> is rated for 3.1 Watts into a 4 Ohm load).
> 
> When the solid state amp is run anywhere near the power output of the
> tube amplifier the THD+N rises dramatically.  For example, the K3
> audio amplifier is already 1% TND+N at just 1 Watt into an 8 Ohm
> load!
> 
> Put a quality 25 W (per channel) amplifier and pair of 8" diameter
> speakers on the K3 and I suspect one would be hard put to distinguish
> between the S-line receiver and K3 receiver in terms of tonal quality
> and distortion.  The K3 would certainly have fewer RF/IF distortion
> products.
> 
> 73,
> 
>   ... Joe, W4TV
> 
> 
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