[R-390] Off-topic IF question

Mon, 7 Jan 2002 14:07:04 -0600

My thinking is that if it uses crystal filtering, 465kc crystals might be harder to find that 455kc.  True?

Barry - N4BUQ

-----Original Message-----
From: Bill Smith [mailto:[email protected]]
Sent: Monday, January 07, 2002 1:53 PM
To: R390 (E-mail)
Subject: Re: [R-390] Off-topic IF question

In a word, yes.  The 455 KHz as a standard (one I grew up with) is "recent".

Probably a variant among manufacturers, or style, or preferences, but
receiver manufactures have used a wide range of IF frequencies.  445, 455,
465, 485 among others, seem to be related to the use of crystal filters. (Is
this true?)   Early supers used frequencies as low as 185 KHz.

73 de Bill, AB6MT
[email protected]

----- Original Message -----
From: "Scott, Barry (Clyde B)" <[email protected]>

>
> Were there common IFs on 465kc?  It seems odd to be so close to the
defacto standard, but not quite there.
>
> Thanks,
>
> Barry - N4BUQ

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