[Repeater-Builder] Unknown board

[jeffcarlyle]

Hi all, I posted 4 pics in the photo section of a board I got in a lot
of radio equipment that I purchased.  I have no idea what it is or
what its used for.  All I know is the 2 connectors on the left, the
top says TX and the bottom says RX, and the 3 pots on the right say
Hi, Lo and VCO.  I got 2 of them exactly alike, any help would be
appreciated.  If you have any more questions or want more pics let me
know. Thanks.

Re: [Repeater-Builder] Unknown board

[Steve S. Bosshard (NU5D)]

Seems like the chips are switched capacitance audio filters - similar 
used in packet tone encoder / decoder.  Don't have a clue.  Steve


jeffcarlyle wrote:
> Hi all, I posted 4 pics in the photo section of a board I got in a lot
>   

Re: [Repeater-Builder] Unknown board

[George Henry]

The XR2206 and 2211 chips are modulator/demodulator chips...  I used them to 
build a RTTY TU for my Radio Shack Color Computer back in '83 or so.  

My guess would be some sort of modem.

George, KA3HSW


-Original Message-
>From: "Steve S. Bosshard (NU5D)" <[EMAIL PROTECTED]>
>Sent: Feb 5, 2008 11:12 AM
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Unknown board
>
>Seems like the chips are switched capacitance audio filters - similar 
>used in packet tone encoder / decoder.  Don't have a clue.  Steve
>
>
>jeffcarlyle wrote:
>> Hi all, I posted 4 pics in the photo section of a board I got in a lot
>>   
>