[George Kavanagh]

Has anyone attempted repair of said YIG Ocsillator sealed assembly ("A6")?
in the HP 8558B Spectrum Analyser? If so, were you successful?

My copy is putting out -32dbm (spec is +15dbm); otherwise seems fine: sweeps
OK, freq is right on, etc.

I suspect the 3 transistor amplifier inside the sealed assy.

Any suggestions?

-georgeK KB1HFT

[Steve]

These are sealed, and even if you could open them,
you don't have the tools or parts to repair. Check
the power supplies and contacts on the bias board,
but this is a common failure mode (blown power amp).

Steve
"George Kavanagh" wrote in message
. ..
Has anyone attempted repair of said YIG Ocsillator sealed assembly ("A6")?
in the HP 8558B Spectrum Analyser? If so, were you successful?

My copy is putting out -32dbm (spec is +15dbm); otherwise seems fine:
sweeps OK, freq is right on, etc.

I suspect the 3 transistor amplifier inside the sealed assy.

Any suggestions?

-georgeK KB1HFT

[Ken Ashcroft]

In article , George
Kavanagh writes
I cannot help on the YIG device, but I do seek help on fixing the
horizontal deflection failure on mine. I have a full manual, but am
finding it tricky to drill down on the precise area.
Has anyone attempted repair of said YIG Ocsillator sealed assembly ("A6")?
in the HP 8558B Spectrum Analyser? If so, were you successful?

My copy is putting out -32dbm (spec is +15dbm); otherwise seems fine: sweeps
OK, freq is right on, etc.

I suspect the 3 transistor amplifier inside the sealed assy.

Any suggestions?

-georgeK KB1HFT




--
Ken Ashcroft

[John A]

"Ken Ashcroft" wrote in message
...
In article , George
Kavanagh writes
I cannot help on the YIG device, but I do seek help on fixing the
horizontal deflection failure on mine.


What's the problem, Ken?