[Heathkit] SB-200

[Robert & Linda McGraw K4TAX]

Let me correct a point.  The meter resistors are not shunts, they are 
multipliers and thus connected in series with the meter.

Typical of carbon resistors is to increase in value with age.  Measure them 
and if out of tolerance by more than 5%, replace them.

73
Bob, K4TAX


----- Original Message ----- 
From: "john" <johnmb at nc.rr.com>
To: "Peter Markavage" <manualman at juno.com>; <Heathkit at mailman.qth.net>
Sent: Tuesday, July 25, 2006 6:59 PM
Subject: Re: [Heathkit] SB-200


> Yep, but not often off by THAT much. As others have said, check the meter 
> shunts.  If they're ok, replace the filter caps.
>
> John K5MO
>
>
>
> At 07:53 PM 7/25/2006, Peter Markavage wrote:
>>Also, check the meter shunt resistors; I believe, without looking in the
>>book, there are 3 resistors in series for the HV meter shunt. If any have
>>changed value, meter reading will be off. As Dougles also says, the panel
>>meter is not that accurate.
>>
>>Pete, wa2cwa
>>
>>On Tue, 25 Jul 2006 19:36:43 EDT KB9GKC at aol.com writes:
>> >
>> > In a message dated 7/25/2006 6:25:55 P.M. Central Daylight Time,
>> > pgondos at hotmail.com writes:
>> >
>> > My  problem is I can only get 1900V on the meter when in HV
>> > position. Manual  says 2400V. Any suggestions ? Thanks.
>> >
>> >
>> > Hello,
>> >
>> >  The HV meter may not be accurate, the volt meter is not a lab
>> > instrument
>> > and could be +/- 10% off.  And the movement may have been  damaged
>> > over the
>> > years from being moved around.
>> >
>> > Apply drive to the amplifier and see if you get 500 watts or so
>> > output, if
>> > so you know the tubes and power supply are in good shape.
>> >
>> > 73 and good luck,
>> > Douglas
>> > Heathkit SB-101A
>> > SteppIR 3 element at 60 feet
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