[Heathkit] SB-200 10M Input Coil Question

[Mark K3MSB]

Interesting.   My manual is a 595-682 and it differs from yours; It shows
the 290 pF as C37 on the input, and the 115 pF C38 on the output.

Thanks to all of you that send me schematics in case I missed a private TU
OM to you...

Mark K3MSB

On Mon, Jan 18, 2010 at 10:06 AM, Carl <km1h at jeremy.mv.com> wrote:

> Manuals 595-682, 682-2, 682-4, 682-5, 682-12  has just a 68pf on the output
> side as C-38.
>
> I have a couple of loose schematics with no reference # that show C-38 as
> 115pf and a new C-39 as 290pf on the input..Since these show C-19 miswired
> I'll "assume" that this is an earlier version.
>
> One popular mod is to change C-38 to 100pf and reduce the coil to 3 turns.
>
> Carl
> KM1H
>
>
>
> ----- Original Message ----- From: "Mark K3MSB" <mark.k3msb at gmail.com>
> To: <heathkit at mailman.qth.net>
> Sent: Sunday, January 17, 2010 9:51 PM
> Subject: [Heathkit] SB-200 10M Input Coil Question
>
>
>  Can you guys check your manuals for me -- there should be a 68 pF
>> capacitor
>> connected from one of the 10M input coil lugs to ground lug AE.    Which
>> lug
>> is it?  and what is the cap on the other lug?
>>
>> My schematics show 115 pF from lug 2 to ground, and 290 pF from lug 1 to
>> ground.  I know Heath changed component values on their SB-200's as I've
>> seen 10M coils with different amounts of turns.
>>
>> Thank you
>>
>> Mark K3MSB
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>