[TenTec] Need help with corsair ii

[Phil Chambley, Sr.]

On 3/25/2013 8:22 PM, nf4r at comcast.net wrote:
>
> Looked at schematic for audio processor and u2a only has pin 1-4,however there is a 15k between pin 1 and 2 of u2a. The chip info in  my manual shows a dot to indicate pin 1.
>
> 1>    8             > is dot.  Is this the right one?
>
> 2      7
>
> 3      6
>
> 4      5
> de nf4r
>
>
> ----- Original Message -----
>
>
> From: "Phil Chambley, Sr." <k4dpk at comcast.net>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Monday, March 25, 2013 1:35:58 PM
> Subject: Re: [TenTec] Need help with corsair ii
>
> *I think R68, at 15k ohms, is holding the first mic amp gain down n the
> Corsair.
>
> If I recall correctly, I have in the past changed this resistor to*
> *around 220k-330k to bring the gain up.  The Paragon has a 470k in that
> position.
> In the Corsair, that resistor is between pins 6 and 7 of U2A
> *
>> **
> *Phil C. Sr.
> k4dpk*
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Dave

I think so.  You can be certain by checking if pin three goes to the mic 
input through a 1 uf capacitor and 106.8k of resistance.

Ten Tec frequently showed one half of an IC being used when it was in 
fact the other half in the circuit.

Phil C. Sr.
k4dpk