[TenTec] ALC circuit on the Corsair I

[N6QW]

Hi Donnie,

Yep that was the problem --all is well now.

Thanks for your email and suggestion.

73's
Pete N6QW

--------------------------------------------------
From: "Donnie Garrett" <cfzepp at gmail.com>
Sent: Sunday, February 10, 2013 10:26 AM
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Subject: Re: [TenTec] ALC circuit on the Corsair I

> Pete:
> Did you first check for damaged diodes D1 & D2 on the SWR board? That may 
> be your ALC problem.
>
> Donnie / WA9TGT
>
> Sent from my iPhone
>
> On Feb 9, 2013, at 1:25 PM, Mike Bryce <prosolar at sssnet.com> wrote:
>
>> Pete,
>>
>> did you follow the adjustment procedure in the manual?
>>
>> the ALC is set by both the front panel control and ALC trimmer on the 
>> LLdriver.
>>
>> Mike
>>
>>
>>
>> On Feb 8, 2013, at 8:44 PM, N6QW wrote:
>>
>>> Looking for someone who knows and understands the innards and outards 
>>> of the TT Corsair I ALC circuit.
>>>
>>> On the Corsair I, I am refurbishing, The ALC controls do not seem to 
>>> function. At first I thought it might be a circuit problem with the ALC 
>>> circuit devices and replaced all of them. Same issue. The ALC barely 
>>> lights when you adjust R11 and R15 has no effect at reducing the power. 
>>> I temporarily put an LED on the ALC board connector as can get that to 
>>> dim.brighten with an adjustment of the panel mounted ALC control but not 
>>> as it should as that is for very low power levels as controlled by the 
>>> Drive control --and the panel LED is really dim.
>>>
>>> At low power levels the temporary LED will come on when you key the MIC 
>>> but dims on voice peaks which is the reverse of what it should do. I 
>>> measured the voltages on all of the devices Q4-Q9 and the values are 
>>> close to what the TT manual says they should be -- so nothing there.
>>>
>>> Any one have any suggestions or clues on how to fix the ALC. Rather than 
>>> clog up the reflector please reply directly to radioguy90 at hotmail.com
>>>
>>> 73's
>>> Pete N6QW
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>
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