Fw: [Premium-Rx] Cubic 3030 info requested.

[Hans.Hamradio]

----- Original Message ----- 
From: Hans.Hamradio 
To: GandalfG8 at aol.com 
Sent: Sunday, November 20, 2005 3:57 PM
Subject: Re: [Premium-Rx] Cubic 3030 info requested.


Hi Nigel and the group

Tnx for info.Got the following reply from the owner of the 3030.

Regards Hans


----- Original Message ----- 
From: GandalfG8 at aol.com 
To: hans.hamradio at lycos.nl 
Sent: Saturday, November 19, 2005 11:28 PM
Subject: Re: [Premium-Rx] Cubic 3030 info requested.
 ..
 

  The only thing that doesn't match is the 16 KHz bandwidth as they had a 10 KHz roofing filter in the first IF.
  You can check the roofing filter easy enough just by opening the first IF module as the filter bandwidth is marked.

The roofing filter is indeed 10 kHz.
Wonder how they get the 16 kHz then?
I've checked it with my spectrum analyzer on the 2nd IF output. The BW is at least 16 kHz, and the slopes are not very steep.


  However, if there's only 5 filters in the 455 KHz IF module

That module seems to be full, and contain 6 Collins filters.

 ..


  Do you know where yours came from?

Fom undisclosed military service.

Regards,

  ----- Original Message ----- 
  From: GandalfG8 at aol.com 
  To: premium-rx at ml.skirrow.org 
  Sent: Saturday, November 19, 2005 11:30 PM
  Subject: Re: [Premium-Rx] Cubic 3030 info requested.


    
  In a message dated 19/11/2005 21:04:04 GMT Standard Time, hans.hamradio at lycos.nl writes:
    It has the TCXO - I can hear the relays clicking rhythmically.

  Hi Hans

  That clicking is most likely to be the hour meters on the back of the receiver.
  It sounds random and mine were driving me crazy before I was told about it.
  Check in the manual, it will show you where the little connectors are on the motherboard and you can just unplug them.

  This set sounds very much like those released in the UK a while ago that were badged Marlborough Communications on the label you mentioned as missing.
  Several, at least, of the Marlborough sets were left with mil air frequencies programmed into the memories which is another clue.

  The only thing that doesn't match is the 16 KHz bandwidth as they had a 10 KHz roofing filter in the first IF.
  You can check the roofing filter easy enough just by opening the first IF module as the filter bandwidth is marked.
  However, if there's only 5 filters in the 455 KHz IF module it could be that the "16 KHz" position is actually just the 10 KHz roofing filter as there was an option to fit another 455 KHz filter which I suspect would have been used for 16 KHz if the 20 KHz roofing filter was fitted.

  My sets are in storage so can't confirm against CPU type or firmware but everything else seems to match.
  Do you know where yours came from?

  regards

  Nigel
  G8PZR




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