Dave wrote:
I have just re-capped the power supply capacitors in a DX-40 with 40uf 450 VDC
Aluminum Electrolytics from NTE Electronics in New Jersey.

Who makes them? NTE does not make capacitors, they rebadge them.

I have noticeable hum on the carrier. Measuring the ripple voltage with a 10
Megohm ac coupled meter shows 2.3+ volts [average/rms ... non-sinusoidal] on the
600 vdc line and 1.2 volts [average/rms ... non-sinusoidal] on the 300 vdc line.

It appears the RS of the capacitors is way too high.

What manufacturer or brand are others using with success? Does MOUSER carry
suitable replacements? If so, what brand/style?

I have been using the Panasonics from Digi-Key for years with no problem.
Always go for 105'F types, even for lower temperature applications. The
BCC ones are fine also.

I am surprised you would have any issue with the NTE ones, though... even
the cheapest caps today have better ESR than the caps of the sixties. I
might look elsewhere first, like a bad rectifier.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."