[A-DX] Wellbrook RF Preamplifier

[Thomas Kamp <df5jl@xxxxxx>]

Hi folks,

mich würde interessieren, ob jemand mit dem RF Preamplifier Erfahrungen gemacht hat (http://wellbrook.uk.com/preamp.html): 

The RF Pre-amplifier was originally developed for the increasing the LF and MF sensitivity of the Wellbrook K9AY directional antenna system. Thus meeting the demanding requirements for the MW, Topband and LW DXer. This amplifier is also available for home construction of the K9AY antenna and other similar applications.

The amplifier is wideband with second and third order intermodulation performance that exceeds most general purpose communications receivers. Therefore, when used in most situations, intermodulation will not degrade reception. However, the user must recognise that the addition of a wideband amplifier may in some cases cause the receiver to generate intermod. If receiver intermod is a problem, then the use of a simple pre-selector either before the pre-amp or the receiver is recommended.

AMPLIFIER FEATURES
· Nominal 17dB gain 50kHz to 10MHz 	· 12dB gain up to 30MHz
· 10dB gain down to 20kHz 	· Multi-transistor Balance design
· Transformer feedback 	· Transformer coupled input
· 50 Ohm input and output 	· Input is either Bal or Unbal
· IP2 ( output ) Typically +90dBm 	· IP3 ( output ) Typically +43dBm
· Power 12v. regulated at 150mA 	· Compact: 40x40x20mm module

Note: IP2/IP3 measured with 0.8MHz and 1.0MHz


Der Preis: £50 .00 / $80.00 - damit wäre doch eine günstige Indoor-Loop zu realisieren...


Tom DF5JL

--
-----------------------------------------------------------------------
Diese Mail wurde ueber die A-DX Mailing-Liste gesendet.
Admin: Christoph Ratzer, OE2CRM  http://www.ratzer.at
-----------------------------------------------------------------------
Private Verwendung der A-DX Meldungen fuer Hobbyzwecke ist gestattet, jede
kommerzielle Verwendung bedarf der Zustimmung des A-DX Listenbetreibers.