[Premium-Rx] Racal R-2174(P)/URR RA6790/GM

[Dan Rae]

On 4/8/2011 6:45 PM, John Flood wrote:
> Greetings,
>   
> The R-2174 I was looking at followed me home today.  I'm happy that I didn't
> grab that Icom R-9000.  I can always get another VHF/UHF RX.  This one is in
> great shape and along with the SSB filters it has 400Hz, 1.3KHz, 9.4KHz and
> 20KHz filters. I'd love to find a filter somewhere around 6KHz.  I looked at
> Torronto Surplus and they state they only sell filters if you get the radio from
> them.  Any one here know any other sources for them?  This is a keeper!
>
>
John, That looks like the filter widths reported by the BITE routine 
which is notoriously inaccurate when it comes to that parameter they 
always show up as wider than they are.  The one you show as 9.4 kHz 
could well be the standard nominally 6.8 kHz wide one.  It makes more 
sense to look at the markings on the filters and work from that.  You 
can enter the filter widths manually easily enough.  The only other 
standard symmetrical  type is 3.2 kHz width, a bit narrow for AM or the 
Collins 6 kHz one sometimes fitted.

Todd Roberts, who I believe is on this list and certainly is on the 
Racal GM list made a batch of little plug in boards carrying a Collins 
5.7 kHz wide mechanical filter which I can thoroughly recommend if he 
has any left.

Dan
ac6ao / g3ncr