1974 Zenith TV - E4760 'Avanti' series

Quick look at the Zenith after replacement of all the 22-5001 safety capacitors. In the video, you can hear the camera picking up noise from the flyback, which normally is not heard during operation.

Category:

Science & Technology

Tags:

• Zenith
• Color TV
• Console TV
• 1974
• analog tv

[Skating4Passion]

if you put a new tube in a old tv housing how would you connect the old channel and volume knobs to the new tube

[Dieverse08]

That second knob should be like that. My gramma had a similar Zenith and the second knob did act as a fine tuner. Like before people tv antenas to tune the stations. The top knob should have let you changed bands UHF / VHF so yea you could watch pretty much anything on these tvs.

I have a very nice and pretty much MINT Zenith from 1981 that Im currently trying to find a good home, rather then throw it away to theelectronics pile at the local dump.

[retroolschool]

I hope to find one of these one day here in Montreal, as I think its one of the coolest looking TVs ever made! My parents had one for almost twenty years! I even have a couple of photos of it.

[932stretch]

By the way, the 22-5001 caps should be EXACT Zenith replacements for absolute safety. Zenith was quite particular about that and the service data indicates the same caution. Also, for the hum bar-check the 24 volt Zener Diode; it may be faulty.

[932stretch]

Serviced Zenith TV's for 40 yrs. Didn't notice any blooming. For sharpness, replace the focus divider. The hum you hear is the vertical circuit running-normal-when you go into service, it stops cuz the vertical is disabled. All TV's have a hi freq squeal. Normal as well; usually women hear it no men so much. It does have a hum bar. Check your pwr Sply/24 volt caps including the non polarized. Modules don't hum. The Zenith 25EC58 Chassis. The Workhorse of the industry. I have several.

[renofirvine]

i have a 1971 avanti(the first year-hybrid/4 tubes)these tvs are in many movies-christina ricci watches the watergate hearings on one in 'the ice storm'

[musicman0150]

You were mentioning the hum? Well, there's also a very high whining sound. You may need to play this back again and listen very carefully. Even when you flipped the TV into service the high pitch sound was still there. On Channel 9, did you try adjusting the VHF fine tuning? It could have drifted slightly.

Gary

[retrochad]

Yes, the HV would go way too high if those safety capacitors went out and the extreme beam current could crack the neck of the CRT.

[retrochad]

Looks great, CRT still looks very strong.

[analogrules1986]

Nice Zenith!