LF: LF Receiver

["lawrence mayhead" <laurie.mayhead@googlemail.com>]

I have for a long time used a Racal 1792 reciever for QRSS modes on LF.
This receiver failed recently,and I have been looking for a replacement receiver.
This search reveals a problem most modern receivers use DSP techniques
for filtering and the AGC is derived from the filtered signal. None of the receivers 
I have looked at have an AGC OFF  facility.This means that if one of these receivers 
is used with ARGO or similar FFT programs a strong signal within the pass band
will desensitise the Rx. It seems quite possible that a weak signal could quite
disapear. It also appears that some AGC is applied before the digital filter so that 
signals within the roofing filters bandwith will also produce de-sensitisation, and this
could be as much as 15kHz away from the tune freq.
Any ideas on receivers not using DSP filtering ?
Or do I look for another R1792     

73 Laurie G3AQC