1970s Zenith Console - Troubleshooting

[Findm-Keepm]

If you are looking for a Zenith voltage divider, look also at the Sylvania ECG replacement types - the Hi-Div series. An ECG Hi-DIV-3 replaces the 63-9896, 63-9897,63-9898, and the 63-9898-02. Various Mounting positions are possible with the ECG replacements too - unlike the Zenith OEMs.

The Internet archive has the ECG replacement guide from 1989, if you wish to look at the HI-DIV-3 data.

https://archive.org/details/EcgSemic.../n469/mode/1up

[ThePlague]

Originally Posted by Findm-Keepm

If you are looking for a Zenith voltage divider, look also at the Sylvania ECG replacement types - the Hi-Div series. An ECG Hi-DIV-3 replaces the 63-9896, 63-9897,63-9898, and the 63-9898-02. Various Mounting positions are possible with the ECG replacements too - unlike the Zenith OEMs.

The Internet archive has the ECG replacement guide from 1989, if you wish to look at the HI-DIV-3 data.

https://archive.org/details/EcgSemic.../n469/mode/1up

I was unable to hunt down any of the ECG Hi-Div-3s. However, I was able to find a Zenith 800-616 kit which replaces the 63-9897 and 63-9898-02. Since the ECG Hi-DIV-3 also replaces those and also the 63-9896, its worth a shot thinking that a 63-9897 will work in place 63-9896.

Not sure if this logic works, but given part availability its worth a shot. I've been trying to find specification information on the 63-9897 to compare to the 63-9896.

[Findm-Keepm]

The 63-9897 is used in the 19EC13 chassis, and is featured in Tekfax 113, available over on World Radio History to the left on the ET/D (Electronic Technician/Dealer magazine page.

It's shown as R353, Focus Divider on page 152 of the Tekfax (or page 153, as indexed by Adobe Acrobat Reader). Two resistors shown, 200 Megohm and a 40 Megohm in series, tapped at the 40 Megohm.

Same page, in the parts list, R353 is listed as a 63-9897.

Just about all Zeniths back then had the 240Meg focus divider, tapped at 40Meg. Even when incorporated in a tripler (ECG523, ECG529, ECG530) - the focus resistor values stayed the same 200 + 40 Megs, tapped at the junction. The same ECG guide I mentioned earlier has the schematics of the triplers and a description of the HI-DIV focus dividers too. HI-DIV 1 and HI-DIV 3 are identical electrically, but mechanically different for the various chassis mounting consideration......in a pinch, either will do.

[zeno]

Originally Posted by Findm-Keepm

If you are looking for a Zenith voltage divider, look also at the Sylvania ECG replacement types - the Hi-Div series. An ECG Hi-DIV-3 replaces the 63-9896, 63-9897,63-9898, and the 63-9898-02. Various Mounting positions are possible with the ECG replacements too - unlike the Zenith OEMs.

The Internet archive has the ECG replacement guide from 1989, if you wish to look at the HI-DIV-3 data.

https://archive.org/details/EcgSemic.../n469/mode/1up

Brian
The thing we were trying to do is stay OEM if posable. Reason for that is
in the 80's we had a few with jail bars & a few have shown up here also.
The common thread was new caps, tripler, divider were replaced.
The 800-616 kit did not sub some dividers IIRC the 14 & 16 inch
chassis. Also the kit had the barrier & a plug for the focus. It did
sub any hybrid chassis that had a divider. With some Zenith parts
like CRT sockets, A minor difference got a new part ## but no subs.
Almost all delta sockets were the same for abt 10 yrs. The difference
was plugs & lead length, one could sub them all.

73 Zeno