I have the 4-pole filter that came out of my Corsair when I replaced it
with a 8-pole one. It is 9 MHz, has 4 crystals and 5 caps. The PC
board is marked "6840" (had to use a magnifying glass to read the 6).
One of the crystals is stamped "8235", which may really be a lot code or
date code.
73,
Bob WB2VUF
On 2/28/2011 12:28 PM, Barry N1EU wrote:
> I'll take a wild guess that it's the 4-pole 2.4Khz filter as used in
> the Corsair I (and probably other 80's xcvrs)
>
> 73,
> Barry N1EU
>
> On Sun, Feb 27, 2011 at 7:45 PM, Bill Dobson<n3wd@n3wd.com> wrote:
>> I have come across a filter that I need some help identifying. It is a 4
>> crystal filter with 8122 on the top and the bottom has I believe M 8840. Any
>> help would be appreciated.
>>
>> Bill, N3WD
>>
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