Zenith 420 help

10/30/2002 11:13:29 AMChuck Braun

Hi,
I found the output transformer on my Zenith 420 had one side of the secondary open; I need to replace it. The set uses two 59's for output, triode-connected. There are two speakers w/ voice coils in parallel, impedance unknown. Can anyone recommend the proper input and output impedance for a replacement transformer? Thanks in advance.

10/30/2002 12:12:58 PMNorm Leal

Hi Chuck

According to tube manuals 59's should have an output transformer with 6000 ohms impedance, plate-to-plate. Secondary in an older radio will be 8 ohms.

Check Play Things Of Past, oldradioparts.com or AES, tubesandmore.com for replacements.

Norm

:Hi,
: I found the output transformer on my Zenith 420 had one side of the secondary open; I need to replace it. The set uses two 59's for output, triode-connected. There are two speakers w/ voice coils in parallel, impedance unknown. Can anyone recommend the proper input and output impedance for a replacement transformer? Thanks in advance.

11/1/2002 8:46:15 AMChuck Braun

:Hi Chuck
:
: According to tube manuals 59's should have an output transformer with 6000 ohms impedance, plate-to-plate. Secondary in an older radio will be 8 ohms.
:
: Check Play Things Of Past, oldradioparts.com or AES, tubesandmore.com for replacements.
:
:Norm
:
::Hi,
:: I found the output transformer on my Zenith 420 had one side of the secondary open; I need to replace it. The set uses two 59's for output, triode-connected. There are two speakers w/ voice coils in parallel, impedance unknown. Can anyone recommend the proper input and output impedance for a replacement transformer? Thanks in advance.

11/1/2002 8:47:19 AMChuck Braun

Thanks Norm!
:
: According to tube manuals 59's should have an output transformer with 6000 ohms impedance, plate-to-plate. Secondary in an older radio will be 8 ohms.
:
: Check Play Things Of Past, oldradioparts.com or AES, tubesandmore.com for replacements.
:
:Norm
:
::Hi,
:: I found the output transformer on my Zenith 420 had one side of the secondary open; I need to replace it. The set uses two 59's for output, triode-connected. There are two speakers w/ voice coils in parallel, impedance unknown. Can anyone recommend the proper input and output impedance for a replacement transformer? Thanks in advance.