Pin 4 is the charge voltage used for Electret type mikes.
73
Bob, K4TAX
>
>
> Thanks for the reply. No scope. Mine has abt. 8.4v at pin four since it
> is a later sn.Also tried battery.
>
> 73 de nf4r
>
>
>
> ----- Original Message -----
>
>
> From: "Barry N1EU" <barry.n1eu@gmail.com>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Sunday, March 24, 2013 4:42:33 PM
> Subject: Re: [TenTec] Need help with corsair ii
>
> Have you tried putting a fresh 9V battery in the 705 mic?
>
> I assume you don't have an oscilloscope.
>
> 73,
> Barry N1EU
>
> On Sun, Mar 24, 2013 at 8:01 PM, <nf4r@comcast.net> wrote:
>
>>
>> I am told that my corsair ll has low audio while on the air. Was using
>> my
>> 705
>> mic.,have also tried my heil mics,with same reports. Both of these mics
>> work
>> fine on my paragon. Corsair was purchased from a friend that had not
>> used
>> it for
>> 3 or 4 years. sn. is 580 02129. I am no tech but have used schematics
>> to
>> troubleshoot and did some homebrewing. Problem is I only have a foggy
>> idea
>> of
>> what I am doing. Traced mic input to audio processor board and found
>> u2a,on pin
>> 3 has 3.7v instead of .9 and pin 5 of u2b also has 3.7v instead of .9
>> and
>> pin 6
>> has 4.1v instead of 1.0. On u1 pin 5 has 2v instead of 0. This is where
>> I
>> get
>> lost and foggy. I have replaced the vfo with the n4yg board but can't
>> see
>> where
>> it should cause my problem. I know the small electrolytic
>> caps go bad but not how to check them. This my first post so am sure I
>> did not give all information needed.
>> Thanks for any help or insight. You can reply to nf4r@comcast.net
>> de nf4r Dave
>> _______________________________________________
>> TenTec mailing list
>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|