[R-390] Carrier Level Meter Issues

[Larry H]

Gary,  I guess the first thing should be to make sure the meter is the
right kind, a low resistance one.  I think it's about 17.5 ohms.  Be
careful not to damage the meter movement when measuring.

Regards, Larry

On Sun, Feb 27, 2022 at 7:28 PM Larry H <larry41gm at gmail.com> wrote:

> Hi  Gary,  This is usually caused by lack of gain in the agc amp string or
> the agc line loaded down by bad caps.  Check v508, v509, v506, z503, r542,
> r549, c542 and c546.
>
> Regards, Larry
>
> On Sun, Feb 27, 2022 at 9:01 AM <gary.biasini at shaw.ca> wrote:
>
>> On my 1967 EAC S/N 4996, I have zeroed the meter as follows:
>>
>>
>>
>> I tuned the radio to a dead space, unhooked the antenna and turned the RF
>> gain fully counter-clockwise.  I then adjusted R523 to zero the meter.
>>
>>
>>
>> However, when I tune to 2 different local (strong) AM stations on the BCB,
>> even though I start to hear the audio when the RF gain is at 4.5 and it is
>> heard very loudly at 7, the carrier level meter only starts to register
>> when
>> the RF gain is at 7.5 and at full clockwise, only registers 40 db.
>>
>>
>>
>> I would like to troubleshoot this but don't know where to start.  If
>> anyone
>> could guide me as to what to check, I would be most grateful.
>>
>>
>>
>> Thank you.
>>
>>
>>
>> Gary
>>
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>