How is that possible?
The lsb and usb bfo frequencies are only 3khz apart
Paul K0UYA
-----Original Message-----
From: Gary J FollettDukes HiFi
Sent: Saturday, January 09, 2016 9:05 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] 3.1 KHz IF Filter for 2nd IF in Omni 6
I bit the bullet and took the entire bottom cover off.
I found that there is also a custom 3.1 KHz filter in the number 1 position
in the first IF (9 MHz)! This is also an 8 pole filter with the IF cans on
board to tailor response. It is equally well made as the second IF filter is
well made.
I’ll report tomorrow on how the radio sounds with quiet band conditions and
also get a transmitted SSB audio report. I may have found the Omni 6 of my
dreams!
I have always hated the SSB sound of the omni 6 (all variations).
I contacted the fellow from whom I got this and he informed me that the
original owner of this radio had these filters custom made for a cost of
over $1000. I sill do not know what company made them but they are top
quality all the way.
Apparently that fellow hated the sound of the Omni 6 as much as I doubt had
the resources to take corrective action.
Hopefully these filters will offer some relief as the overall design of the
Omni 6 is one of my favorites over any other radio design.
It’s also on of the prettiest radios going.
Gary
On Jan 9, 2016, at 8:17 PM, Mark S. Holden <mark@holden-insurance.com>
wrote:
On 1/9/2016 8:32 PM, Gary J FollettDukes HiFi wrote:
I have a 3.1 KHz bandwidth filter in one of my Omni 6+ radios. It fits
perfectly into the TenTec socket and was obviously made for the en Tec.
However, it looks unlike any filter I havee ever seen in ANY Ten Tec
product.
It is an 8 pole filter but it also had four small IF transformers on it,
presumably to tailor the passband shape.
Has anyone heard of this filter? Does any know who made it? It is too
perfect to have been a home brew job. It is built on thicker board stock
than that used for most Ten Tec filters.
I would assume that its intent is to improve received audio in SSB. I am
going to try it in a few minutes to see what the radio sounds like
compared with the others.
Gary
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I'd expect that to be a fun filter for rag chewing.
My Harris RF-550 rx has a 3.24khz crystal filter that's incredible for
SWL. I also installed some crystal filters intended for the Racal 6790gm
in my AOR 7030+
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