[Boatanchors] Viking II Modulation Problem

[Richard W. Solomon]

Don't know if it was factory built or a kit, but the physical
circuitry matches the schematic in the manual.
Beyond that, my Xtal Ball gets cloudy !!

73, Dick, W1KSZ

-----Original Message-----
>From: Carl <km1h at jeremy.mv.com>
>Sent: Oct 10, 2009 1:53 PM
>To: Al Parker <anchor at ec.rr.com>, "Richard W. Solomon" <w1ksz at earthlink.net>, boatanchors at mailman.qth.net
>Subject: Re: [Boatanchors] Viking II Modulation Problem
>
>If it was factory built it has a chance of being correct and unhacked. If it 
>was a kit than anything is posible.
>
>Carl
>KM1H
>
>
>----- Original Message ----- 
>From: "Al Parker" <anchor at ec.rr.com>
>To: "Richard W. Solomon" <w1ksz at earthlink.net>; 
><boatanchors at mailman.qth.net>
>Sent: Saturday, October 10, 2009 10:28 AM
>Subject: Re: [Boatanchors] Viking II Modulation Problem
>
>
>> Seems like the screens oughta be bypassed originally.
>> 73,
>> Al, W8UT
>> ----- Original Message ----- 
>> From: "Richard W. Solomon" <w1ksz at earthlink.net>
>>
>>>I decided a scope would help in tracking down why I
>>> have low modulation levels.
>>> Surprise !! Looking at the Plate and Screen of the
>>> second audio stage I get a high level of oscillation
>>> as I crank the Gain Pot past about 4 on the dial.
>>> I don't see any oscillation on the Grid ??
>>>
>>> This is the stock Viking II audio circuit, no mods
>>> made except to replace the caps.
>>>
>>> Maybe I should bypass the screen of the second stage ??
>>>
>>> Any thoughts ??
>>>
>>> 73, Dick, W1KSZ
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