I agree with all Mike has said.....
Cecil...
----- Original Message -----
From: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>
To: "Cecil Acuff" <chacuff@cableone.net>; <yaesu@contesting.com>; "Peter
Sundberg" <sm2cew@telia.com>
Sent: Thursday, July 20, 2006 4:54 PM
Subject: Re: [Yaesu] Roofing filter
> Hello Yaesu Fans:
>
> The answer to this question in my experience is a little more complex. I
> have had the roofing filter installed in my original Mark V radio since
> they
> became available.
>
> Besides the type of operation, be it contest, or be it rag chewing, the
> antenna and antenna site must also be part of the equation.
>
> For operators with large arrays, monoband yagis, etc., the roofing filter
> will be found to be quite helpful. The many strong signals heard with
> high
> gain antennas will often cause the operator to hear whiskering on channel,
> from signals quite nearby. Naturally, the IMD situation is also worse
> with
> large high gain antennas, and here you will find an improvement with ghost
> signals particularly during contests with the roofing filter.
>
> Many people lament the lack of being able to switch in either the low
> noise
> 1st IF amp modification, or the roofing filter.
>
> My experience is that the earliest prototype roofing filters must have had
> greater losses thru the crystal filter. Accordingly, the two stage low
> noise amplifier which Inrad includes with the filter, was designed for
> somewhat greater gain than the insertion losses within the filter. Later,
> the filter technology improved, and the latest filters had less insertion
> losses. This left even more surplus gain, allowing the same kind of
> improvement which is experienced with the older Inrad IF mod.
>
> This is to say, in the Mark V radio, that beside the above improvements of
> less intermod and whiskering, you are able to reduce the IF gain in menu
> 9-1
> by several integers, and reduce the noise floor of your radio. This makes
> working low signal strength stations extremely easy. I always keep my RF
> gain turned down to 1 o'clock to 2 o'clock. There is very little IF hiss
> with the roofing filter mod installed.
>
> Because of these improvements, and the configuration of my personal
> station,
> and its hilltop location, I would not be without this relatively easy to
> install upgrade.
>
> It is really hard to go wrong here. Purchase the mod, install it, test
> it,
> and if you are not satisfied, you will be able to list if for sale here,
> or
> on the Inrad reflector. It will sell probably in 1 hour.
>
> 73 and Happy DXing,
>
> Mike
> W2AJI
> ----- Original Message -----
> From: "Cecil Acuff" <chacuff@cableone.net>
> To: <yaesu@contesting.com>; "Peter Sundberg" <sm2cew@telia.com>
> Sent: Thursday, July 20, 2006 2:02 PM
> Subject: Re: [Yaesu] Roofing filter
>
>
>> No Flames here....
>>
>> Probably in day to day use it would not be noticed and only now and again
> in
>> competitive use on extremely crowded bands....like 20 mtrs.
>>
>> I don't consider it an obsession as much as a hedge. No need to invest
>> in
> a
>> 3 to 15 thousand dollar radio if you can make the receiver you own
>> perform
>> as well for a few hundred bucks. Now I wouldn't invest in the roofing
>> filter performance improvement if the basic radio wasn't as good as the
>> FT-1000 is....We all agree on that point. It is an excellent radio.
>> Throwing roofing filters at badly designed radio's is probably not
> smart....
>>
>> I've heard reports of the roofing filter mod changing the entire feel of
> the
>> FT-1000 on receive....and if getting rid of some of the buckshot from a
>> nearby power house makes the QSO more enjoyable then it's worth the
>> money.
>> Personally I would like it so I could switch the thing in and out to be
> used
>> as needed.
>>
>> I think you will find all new HF receivers will incorporate more narrow
>> roofing filters in their designs. Now that close in IMD testing has been
>> accepted as more real world than the old wide space testing it just makes
>> more sense. Obsession.....I think it just good engineering practice.
> Nice
>> that the FT-1000 lends itself to being able to easily take advantage of
> the
>> improvement when desired.
>>
>> Just my 2 cents worth though...
>>
>> Cecil Acuff
>> WB5VCE
>> ----- Original Message -----
>> From: "Peter Sundberg" <sm2cew@telia.com>
>> To: <yaesu@contesting.com>
>> Sent: Thursday, July 20, 2006 10:47 AM
>> Subject: [Yaesu] Roofing filter
>>
>>
>> > At risk of being flamed, I feel that this obsession with having a
> roofing
>> > filter in the FT1000 is somewhat exaggerated.
>> >
>> > How many times during normal use of the radio do you notice a vast
>> > improvement with the roofing filter in line?
>> > How may times has this helped you to complete a contact you never would
>> > have made without it?
>> >
>> > Yes, there are specific situations when it helps, but the radio
> (modified
>> > per W8JI) is pretty darn good without it. Even during contests,
> including
>> > Top band.
>> >
>> > FWIW.
>> >
>> > 73 de Peter SM2CEW
>> > www.sm2cew.com
>> >
>> >
>> >
>> >
>> > At 21:25 2006-07-19 , Cecil Acuff wrote:
>> >>Think I'll stick a roofing filter in my 1000 series and sit back and
> watch
>> >>for a while...
>> >>
>> >>Cecil
>> >>WB5VCE
>> >>----- Original Message -----
>> >>From: "David Novoa, W4DN" <dnovoa@bellsouth.net>
>> >>To: <yaesu@contesting.com>
>> >>Sent: Wednesday, July 19, 2006 6:57 AM
>> >>Subject: Re: [Yaesu] FT2000 later... FT1000 BACK!?
>> >>
>> >>
>> >>> The Ham Station is notifying those on their waiting list that they
> will
>> >>> have
>> >>> the FT-2000 in stock by the end of the month for $2999. 73,
>> >>> Dave,W4DN
>> >>>
>> >
>> >
>> >
>> > _______________________________________________
>> > Yaesu mailing list
>> > Yaesu@contesting.com
>> > http://lists.contesting.com/mailman/listinfo/yaesu
>> >
>>
>>
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>
>
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