FW: [AMPS] RF preamps for VLF

[Tom Tishken KD4WOV]

-----Original Message-----
From: Tom Tishken KD4WOV [mailto:kd4wov@earthlink.net]
Sent: Tuesday, June 06, 2000 14:11
To: Paul Hrivnak
Subject: RE: [AMPS] RF preamps for VLF


simple preamp: A preamp with a single transistor/modular amp with passive/or
crystal filters
as opossed to a multi transistor preamp.

-----Original Message-----
From: Paul Hrivnak [mailto:palstar@erinet.com]
Sent: Tuesday, June 06, 2000 13:14
To: kd4wov@earthlink.net
Subject: Re: [AMPS] RF preamps for VLF


>Has anyone any experiance or schematics for preamps for VLF around 110khz
to
>190khz?
>
>Any thoughts about simple preamps with a tunable preselector and gain
>controls?

We make a model that goes down to 300Khz and a new preamp tuner that tunes
500Khz to 1750Khz and has a preamp in the bypass mode that goes down to
120Khz.
What is a "simple preamp"? You are asking for a complex wish list...simple
is not a good word
Regards Paul
>
>Any thoughts about HF monoband preamps?
>
>Any thoughts on HF mono band preamps with a very narrow bandpass to
>eliminate blanking due to high power SW stations?
>
>In contesting has anyone used preamps with AGC?
>
>
>Last question:
>Has anyone used negative feedback with transistor amps for better
linearity?
>
>
>--
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Bramco Palstar Inc.
Piqua, OH  45356
palstar@erinet.com




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