Zenith 7H995 - Printable Version

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Zenith 7H995 - vecher - 10-21-2020

ALL, Have a zenith that the Rectifier is open SE-1.. I was going to replace it anyway  But what do I use?

Would a 1N4007 work? or do I need something different..

[Image: https://live.staticflickr.com/65535/50512586558_0bc7724e62_c.jpg]

Here is schematic partial..

[Image: https://live.staticflickr.com/65535/50513298186_d6ac10ed56_c.jpg]


PS one other question  There are a few resistors marked WW  I assume that means wire wound  Do they have to be wire wound?

Thanks

Skip

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RE: Zenith 7H995 - David - 10-21-2020

1N4007 will work you will need to change R-20 from 22ohms to something around 50-80ohms. The 1N4007 will drop voltage around 7/10 of a volt the old SR-1 was dropping the voltage around 7 volts. Plus with todays higher mains voltage necessary to get B+ in the right spot. I do like wire wound but have used carbon when that was the only kind at hand. The carbon will have a shorter life.

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RE: Zenith 7H995 - David - 10-21-2020

Looks like we have 2 sets post!  Found my notes from a Zenith model T825F  chassis 8T01  year 1955. R-20 was 22ohms at 2 watts replaced with 50ohms at 5 watts. Did not have any 1N4007 at the time so used 2 1N4005 in series net effect 1amp at 1200piv.

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