[ICOM] anyone have preselector experience?

[Steven Moore]

Hi Adam,

I hadn't thought of the tuner but it makes sense. I use a homebrew double L balanced tuner. It might add some 
preselection as well ?

Thanks for the info about the loss. With all the talk about roofing filers, I thought a tight preselector 
might be of some benefit. It would at the least be something else to play with :-)

73,
Steve  wd0ct

----- Original Message ----- 
From: "Adam Farson" <farson at shaw.ca>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Saturday, September 10, 2005 12:22 AM
Subject: RE: [ICOM] anyone have preselector experience?


> Hi Steve,
>
> I use an IC-756Pro3 as an exciter for a Yaesu VL-1000 amplifier. I find that
> the amplifier's autotuner (a T-network with a large, high-Q inductor)
> provides some additional preselection.
>
> The trade-off when using a passive outboard preselector with a high-Q tuned
> circuit is that the insertion loss can be fairly high (5 to 10 dB). This may
> be significant on the higher bands (14 MHz and above.) The precautions
> mentioned in the preselector manual must be observed to avoid damage.
>
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
> Behalf Of Steven Moore
> Sent: 09 September 2005 21:57
> To: ICOM Reflector
> Subject: [ICOM] anyone have preselector experience?
>
> Has anyone used an outboard preselector with their Icom? If so did you
> notice an improvement in dynamic range?
>
> I'm interested in maybe buying one of these:
> http://www.mfjenterprises.com/products.php?prodid=MFJ-1048
>
> 73
> Steve  wd0ct
>
>
>
>
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