[Premium-Rx] Racal RA1772

[Michael O'Beirne]

Dear Vahe

Many thanks for the email.  If ever you need some help, there are a few of 
us   who can probably help from this side of the Atlantic.

73s
Michael
G8MOB

----- Original Message ----- 
From: "Ohanian, Vahe" <VOhanian at tempel.com>
To: "Michael O'Beirne" <michaelob666 at ntlworld.com>
Sent: Monday, August 09, 2010 5:14 PM
Subject: RE: [Premium-Rx] Racal RA1772


> Hello Michael
>
> Thanks for your response I appreciate your comments ...
>
> I did find some 400 Hz Filters for IF ..and installed one  the rest is 
> still open !   I was very lucky
> I think someone took the board to take out the filters for a project or 
> sale !!
>
> Again if you ever come across remember me .. Please
>
> Vahe
>
>
> -----Original Message-----
> From: Michael O'Beirne [mailto:michaelob666 at ntlworld.com]
> Sent: Sunday, August 08, 2010 6:01 AM
> To: Ohanian, Vahe
> Subject: Re: [Premium-Rx] Racal RA1772
>
>
> Dear Vahe,
>
> In response to your email yesterday, I am sorry to be the bearer of bad
> news.
> The 6kHz AM filter is incredibly rare.  In 15 years or so I have only ever
> seen one, and that was installed in a 1772.
>
> There should be thousands of 1.4MHz filters about from many manufacturers 
> as
> it was about the most common IF for European-made receivers and 
> transceivers
> in the 1970s - 80s.  However, they come in all manner of pin-outs and
> impedances and many will not fit and/or function in the 1772.  You need to
> get one with a Racal part number checked against the inventory description
> in the manual, otherwise it is very much pot luck.
>
> To add to the issues, there are 129 different IF filter arrangements in 
> the
> 177x series depending on the application. [You can find the filter set 
> from
> the black label on the rear panel.]  The arrangement code starts "A" and 
> the
> final one is "FK".  I have all the decode details here.   If you have any
> specific filter queries please contact me direct.
>
> 73s
> Michael
> G8MOB
>
> ----- Original Message ----- 
> From: "Ohanian, Vahe" <VOhanian at tempel.com>
> To: <richardreich at aol.com>; <michaelob666 at ntlworld.com>
> Sent: Saturday, August 07, 2010 11:37 PM
> Subject: RE: [Premium-Rx] Racal RA1772
>
>
>> Do you any of you gentlemen know where I can get some IF filters for the
>> 1772 I have one with missing board  I found a board  now  NO IF filters 
>> I
>> found a 400 HZ  I am looking for AM filters  6 KHZ +
>>
>>
>> Any help or hint is appreciated
>>
>> Vahe Ohanian
>> ( ՎահԷ Օհանիան )
>> Director Technical Services
>>
>> TEMPEL STEEL - CHICAGO
>> vohanian at tempel.com
>> 773 - 250 8178
>>
>> Cell 773 - 793 9320
>> Visit our Web Page at: www.tempel.com
>
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