[Hammarlund] SP600 - Reduced gain on 13kHz bandwidth

[David Wise]

Thanks responders for your helpful comments.  The majority say
that their experience matches mine, that 13 is low compared
to 3 and 8.  AGC does its best to mask this, so I measured it
with AGC off, and with a nonsaturating signal level.

One person said 13 was the same as 3 and 8.  Please send
me photos when convenient.

Regards,
Dave Wise

 ----- Original Message -----

From: David Wise
To: Hammarlund at mailman.qth.net
Sent: Thursday, January 07, 2010 4:51 PM
Subject: [Hammarlund] SP600 - Reduced gain on 13kHz bandwidth


I'm taking a second look for problems in my daily runner.
One thing I noticed is that the gain on 13kHz bandwidth is
about 1/3 that of 3kHz and 8kHz.  3 and 8 are equal.
The manual shows a response curve where all bandwidths
peak at the same gain.  It's too good, makes me suspect
someone just drew it reflecting expectations.
I'd like to compare notes with other SP600 owners.
Does your signal strength reading stay the same from 3 to 8 to 13?