Topband: How to hear through static crashes?

[ZR]

One of the best receivers made for noisy bands is the RCA designed pre WW2 
USN RAK/RAL pair.

Regen design with 2 TRF stages and a rather unique audio AVC/Limiter and 
excellent audio selectivity for CW.

I use a RAK at times to cruise MF and LF when the static is too much for the 
HRO-500/LF-10 and a RAL for some vintage rig CW.

Havent given it any consideration for 160 so thats been added to the 
list...move the 70# RAL and 41# PS to somewhere I can fit it (-;

Carl


----- Original Message ----- 
From: "Brian Mattson" <k8bhz at hughes.net>
To: <Topband at contesting.com>
Sent: Thursday, March 29, 2012 7:27 PM
Subject: Topband: How to hear through static crashes?


>I find that my 1927 Regenerative Receiver does quite well with QRN. No agc, 
>excessive gain, or ringing filter problems at all & simple audio filtering 
>is very effective.
>
> It has two different audio filters; one is a simple R/C that eliminates 
> all the high frequencies. The other is an L/C peaking filter made from a 
> Model T Ford spark coil secondary and a mica cap. Because of the large 
> number of turns of fine wire, the series R is quite high, making for a low 
> Q, non-ringing filter. If the first filter is switched in along with the 
> second, the added C merely lowers the L/C center frequency, which seems to 
> help with QRN.
>
> The resulting signal in the Baldy headphones is much more pleasant to 
> listen to than that from my "modern" receiver set-up!
>
> The low (30" high) Beverage is also quieter than my 6 element vertical 
> receive array when the QRN is high.
>
> Brian  K8BHZ
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
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