SB-610 Oscillator Problem

[Randall C. Iliff]

Hi All,

I'm working on an SB-610 and for some reason neither oscillator will
function.  Parts are the right ones, soldering is ok, switch cleaned, tube
checked.  The cathode resistors have grown from 6,800 (heath value) to a
current value of 10,150 and 7,800 ohms respectively.  I can certainly swap
those out, and the 10 mfd caps that bypass them, with parts on hand but have
not yet done so.

Anybody else ever encounter a similar problem with these seemingly simple
oscillator circuits?

My concern is that the PEC phase shift networks seem to be open between pin
1 and 2.  (It seems odd to me that they'd both read that way, so maybe I'm
not measuring them properly.)

Anybody have the component values inside that overgrown ceramic package?  At
least then I could check these units or build up individual component
substitutions if they are bad.

Thanks, and best wishes for a wonderful new year!

All the best,

Randy (KE0BN)








On 12/29/04 1:44 PM, "w0akg1" <w0akg1 at EARTHLINK.NET> wrote:

> Some one has these made, I need one, thanks Guys.
> Martin Tippin WØAKG
> 31 Circle Dr.
> Windsor, Mo 65360
> 
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Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

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