This is my second Zenith 5R-216 I have worked on. The schematic calls for two filter caps: C9,8uF and C10, 10uF. The original caps in both of these radios are C9,16uF and C10,20uF. Did Zenith publish something that shifted these values higher in production. ?

:This is my second Zenith 5R-216 I have worked on. The schematic calls for two filter caps: C9,8uF and C10, 10uF. The original caps in both of these radios are C9,16uF and C10,20uF. Did Zenith publish something that shifted these values higher in production. ?
:
Hi George,
Are you sure these are not replacements?

Best Regards,

Bill Grimm

::This is my second Zenith 5R-216 I have worked on. The schematic calls for two filter caps: C9,8uF and C10, 10uF. The original caps in both of these radios are C9,16uF and C10,20uF. Did Zenith publish something that shifted these values higher in production. ?
::
:Hi George,
: Are you sure these are not replacements?

Hi Bill, They both appear to be original. Aluminum cans with paper sleeves over them, looks like original wiring. It just seems odd that both radios have exactly the same larger value filter caps.
:
:Best Regards,
:
:Bill Grimm
:

Hi George

There could have been an early factory revision to eliminate hum. Exact values aren't critical but larger capacity filters hum better. I would use 22 mf @ 450 volts for each cap if being replaced.

This schematic has 8 and 14 mf.

http://www.nostalgiaair.org/PagesByModel/980/M0024980.pdf

Norm

:::This is my second Zenith 5R-216 I have worked on. The schematic calls for two filter caps: C9,8uF and C10, 10uF. The original caps in both of these radios are C9,16uF and C10,20uF. Did Zenith publish something that shifted these values higher in production. ?
:::
::Hi George,
:: Are you sure these are not replacements?
:
:Hi Bill, They both appear to be original. Aluminum cans with paper sleeves over them, looks like original wiring. It just seems odd that both radios have exactly the same larger value filter caps.
::
::Best Regards,
::
::Bill Grimm
::
:

Thanks Norm, and Bill for your input, greatly appreciated

:Hi George
:
: There could have been an early factory revision to eliminate hum. Exact values aren't critical but larger capacity filters hum better. I would use 22 mf @ 450 volts for each cap if being replaced.
:
: This schematic has 8 and 14 mf.
:
:http://www.nostalgiaair.org/PagesByModel/980/M0024980.pdf
:
:Norm
:
:
::::This is my second Zenith 5R-216 I have worked on. The schematic calls for two filter caps: C9,8uF and C10, 10uF. The original caps in both of these radios are C9,16uF and C10,20uF. Did Zenith publish something that shifted these values higher in production. ?
::::
:::Hi George,
::: Are you sure these are not replacements?
::
::Hi Bill, They both appear to be original. Aluminum cans with paper sleeves over them, looks like original wiring. It just seems odd that both radios have exactly the same larger value filter caps.
:::
:::Best Regards,
:::
:::Bill Grimm
:::
::
: