[Premium-Rx] Racal 1772/78 receivers

[Thomas Adams]

BTW...   re the WJ 8718;

My shack also contains the AN/URR-74 (V) 2, the military version of the 8718.

For BCB DXing, the RA01772 beats it by a country mile.


Mr. T.  W9LBB



At 13:36 10-08-10, Enrique Fernandez García wrote:
>
>
>I purchased a 'non standard' unit,came from RAF, 
>with these filters fitted 0,4, 1,24, 2,7 and 8 
>Khz has the ISB option fitted with AFC.
>
>  It affects mainly the mode and bandwidth 
> features.  Later I did some modifications on 
> the USB and mode swiches in order to have a 
> 'standard' set.  I removed the 0,1 Khz filter, 
> some wire links need to be changed, and added a 
> 6,8 Khz filter instead. ( Thanks Dan for your help ! ).
>
>    The difference in listening with the 6,8 and 
> the 8Khz filters it is noticeable but for my 
> taste and use I would need something more narrower.
>
>Mainly I use it for AM BCB Dxing on tropical 
>bands but when I need to identify a weak station 
>I use the LSB filter with fair results.
>
>My only complain it is that when I try to listen 
>a faint signal it is quite difficult to 
>understand the ID or the speech, audio it is too 
>bassy and it would need a better audio recovery 
>so I will try the ELPAF audiofilter.
>Quite sure that a better headphones would mark a 
>difference but I have still not found the 
>perfect match.  I tried the Japan Radio Company 
>ST-3 but no significant improvement.
>Another good option would be to install a 600: 8 
>audio transformer and listening with 8 Ohms headphones.
>
>Now, I am thinking about to get a 1778 , but I 
>do not know if I really need it or with the 1772 it is enough.
>On latter posts somebody asked for the WJ 8718A 
>receivers , they are again for sale at a fair price.
>
> 
>http://cgi.ebay.com/Watkins-Johnson-WJ-8718A-HF-shortwave-receiver-/180532736925?pt=LH_DefaultDomain_0
>
>
>
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