Luca:
Check to see that you are getting a mute voltage transition at connector 44
pin 2 on the IF/AF board. If so then most likely Q12 has failed or D9 is
shorted thus not allowing muting of the audio output stage U10. Input
audio to U1 is supplied via pin 3 of connector 55 and is muted by Q12
conducting to ground.
Before you dig too deep be sure all the connectors are well seated. It
wouldn't hurt to carefully unplug connector 44, 48, 55 and 50 and then
reconnect just in case there is a dirty contact on the mute or ground lines
to the AF/IF board. The current levels are very low in this circuit and
thus not enough voltage to create a "punch" through on an oxidized
connector.
73
Bob, K4TAX
----- Original Message -----
From: "Luca" <ik5tsw@virgilio.it>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Thursday, September 08, 2005 2:47 PM
Subject: [TenTec] paragon audio noise in trasmission
>
> Luca wrote:
>
>> Hi to All
>>
>> I am new member of this very intresting mail list .
>> I have purchase second hand Paragon 585
>> When trasmitting i have the distorted audio in a speaker ,is a truble ?
>> Or is normal ?
>> You have a possible remedy ?
>>
>> Sure of your intresting many thanks in anvance
>>
>> 73 Luca
>> _______________________________________________
>
>
>
>
> Luca:
>
> Just turn down the monitor control on the back panel. This is a voice
> sidetone for checking the speech processor, but it isn't particularly
> useful.
>
>
> 73,
>
> Bob WB2VUF
>
>
>
>
>
> Make sure that the MONITOR level control on the rear panel is turned down.
>
> 73
> Bob, K4TAX
>
> Luca wrote:
>
> Many thanks to all for your answer
>
> In my Paragon the MONITOR LEVEL , AF GAIN , RF GAIN ore in max
> counter-clockwise ad i use the dummy load
>
> The problem to decrease if i turned down the RF POWER ad increase in
> lower band
>
> I think the RF retur
>
> Many thanks in advance
>
> Luca ik5tsw@virgilio.it
>
>
>> _______________________________________________
>
> _______________________________________________
> 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
|