Amps
[Top] [All Lists]

[AMPS] 6146 splatter help?

To: <amps@contesting.com>
Subject: [AMPS] 6146 splatter help?
From: W8JI@contesting.com (Tom Rauch)
Date: Mon, 1 Jan 2001 17:39:51 -0500
> Is there any way to improve the splatter on my TS830s (low s/n) with RCA
> 6146B's?

Load it heavy enough, and make sure the bias is set properly. 
Watch the audio gain.
 
> On voice peaks (p's, t's and ch's) there are burps like key click sup and
> down the band about -40-60 db from the intended energy. It is only barley
> noticeable up and down with a 10+ S9 signal in another rcvr (although I
> hear the same thing coming from my TS130 too).

The ALC is too slow on attack. Over-tuning (load control open a bit 
further than normal) helps, as does keeping just at the edge of ALC.

> It is clean from the 12BY7 on a spectrum analyzer (FM/AM 1100s).  It seems
> that maybe the alc just isn't fast enough whenever the grid starts pulling
> current. 

Bingo.

73, Tom W8JI
w8ji@contesting.com

--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com


<Prev in Thread] Current Thread [Next in Thread>