DIYbanter - View Single Post - Dead section of FM band on Sansui Stereo Receiver 661

jakdedert

jakdedert wrote:
hr(bob) wrote:
On Jan 7, 12:17 pm, "N_Cook" wrote:
Do the stations agree with the scale markings? ie someone restringed
wrongly.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list
onhttp://home.graffiti.net/diverse:graffiti.net/

What is the tuning mechanism, if it is a moving variable capacitor,
maybe the plates are shorting, that would explain the deadness at the
same points in the dial for both am and fm.

That would be my guess as well...shorting could mean bent plates or
foreign material (even dust) in the plates.

OP: look for a fairly large unit that moves with the tuning knob. It
will be silver with a series of interwoven aluminum plates. They should
mesh together without touching...even a little. Can be cleaned out with
compressed air, or vacuum. Straightening is a little more finicky.

Careful: Fragile!

jak

Picture of the part described above:
http://www.classicsansui.net/images/Literature/Receivers/661/661b.jpg
It's the silver thing at the extreme left of the circuit board in the
first picture.

Remove everything from "661" on, in the URL to get to the rest of the
brochure. That's a pretty nice piece to get for free....

jak