[Boatanchors] Receiver questions

[Richard Knoppow]

----- Original Message ----- 
From: "Ian Wilson" <ianmwilson73 at gmail.com>
To: <boatanchors at mailman.qth.net>
Sent: Sunday, December 19, 2010 7:03 AM
Subject: Re: [Boatanchors] Receiver questions


> Thanks all for the info. The SX-115 always seems to get 
> very high marks. The
> tube lineup is reasonable but not stellar (6DC6's, 6BA6 
> mixers, 6BY6 product
> detector); I assume that its high marks come from its 
> sensitivity,
> stability, and
> AGC?
>
> 73, ian K3IMW
>
     There are a lot of factors other than the tube types 
that affect receiver perfomance. Among them are the quality 
of the compenents and the layout and shielding. Stability is 
mostly due to layout and component quality although the 
circuit design is also important. The receiver must be free 
of spurious responses such as images and birdies. Tube types 
are of secondary importance in meeting these requirements. 
My guess is that whatever makes the SX-115 a good receiver 
has little to do with the types of tubes used in it.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com