Re: LF: Mystery VLF-MF RX

[Marco IK1ODO -2 <ik1odo@spin-it.com>]

At 13:11 09-09-11, you wrote:
> Hello all,
>  
> Did anyone hear about this RX:?
> http://www.radiomuseum.org/r/hrb_hw1390a.html
>  
> I found this item available on eBay as well:
> http://www.ebay.de/itm/HRB-Systens-HW1390A-Extremely-Professional-built-SLF-ULF-ELF-VLF-LF-MF-Receiver-/250889327409?pt=DE_TV_Video_Elektronik_Funkger%C3%A4te&hash=item3a6a2b5331
>  
> In vain I searched (briefly) for a web of the manufacturer.
>  
> (yes, it is expensive, yes, we can make RX ourselves...)
>  
> 73, Petr, OK1FIG


Seems to me a little outpriced, if not as a collector part. At the same
price you get a Perseus or other SDR receivers, covering from kHz to 30
MHz, with a completely different performance.
Receiver technology has advanced a little in last 5 years ... said by an
HF receiver collector (I have about 30 different models) and appassionate
tester (I mean, I like to measure them).

On this matter, have a look at the work of SM5BSZ Leif on receiver AGC
performance in

http://www.sm5bsz.com/lir/agc/agc.htm

73 - Marco IK1ODO