Unusual 4-leg safety cap

[Findm-Keepm]

Originally Posted by zeno

Theres your answer Jon...... I didnt get msg til last nite.

The Zenith kit is 800-860 . Often on E-bay.
BE VERY CAREFUL TO CHECK THE VALUE !!
The 13" 13GC10 + & the 17" & 19" EFL jugged sets used a different value.
Orange ones did fail. Either shorted popping breaker or opened causing
no HV. Never had one fail with causing too much HV.

13" sets used the 800-863 (3 and 13 end in 3...easy to remember)
17-19" sets used the 800-860 kit, AFAIK. Correct me if I'm wrong...

I know of one other kit, the 800-896, but I think it's for flat chassis sets.

All you really need out of the kit is the cap and the sleeving - most caps can hold themselves in place without the zip tie, and the label for the back is most likely dried out by now.

[zeno]

http://www.ebay.com/itm/ZENITH-RADIO...8AAOSwjXRXcAIA

The focus divider is the kit for 4 tube hybrids.

73 Zeno

[old_coot88]

Originally Posted by zeno

...Never had one fail with causing too much HV.

73 Zeno
LFOD !

I've seen it in Zeniths. It cuts the neck off right where the neck joins the bell of the jug. Perfectly clean cut, slick as a whistle.

[Jon A.]

Originally Posted by Findm-Keepm

So yours is bad? It's of the same generation as the Blue EROs, which are the good kind.... that "-4d" is the key. Blue ones are also of the same generation of KP1831 caps:

http://www.ebay.com/itm/1pc-0056MFD-...-/182302985736



What's wrong with another ERO? Saw them for years, no problems. The blue ERO/Roerderstein caps are constructed like the orange drops - they have a failsafe construction - opening up the B+ line to the collector of the HO Transistor. Do a google search by value - somebody probably has one stashed somewhere. I'll look at some of my GE stash - I know I have the two lead variety, but not sure of any 4-lead stuff.

My cap is working, I'm just afraid anything with a 4-leg cap that *isn't* an orange drop may suffer catastrophic failure.

Thanks for checking your stash.

Originally Posted by zeno

Theres your answer Jon...... I didnt get msg til last nite.

The Zenith kit is 800-860 . Often on E-bay.
BE VERY CAREFUL TO CHECK THE VALUE !!
The 13" 13GC10 + & the 17" & 19" EFL jugged sets used a different value.
Orange ones did fail. Either shorted popping breaker or opened causing
no HV. Never had one fail with causing too much HV.

Remember the blue ones in Warwick sets but never had a fail.
They were used in that terrible 19" with an RCA bonded yoke set.

Early GE SS sets used a 2 lead white cap behind the HOT.
went left & right. Instant death for the HOT. Change any white ones,
good ones were blue & from Europe IIRC. The white ones would
come apart by pulling on the leads even if still "good".

Maggy same as Zenith. Change any white ones. Sets with
703744-## reg modules also had a shut down. Too much HV would
cause the hoz osc to go way off with narrow pix to prevent disaster.
The symptom is usually the reg board or PC cons.
Other sets with this type SD circuit were RCA, Panny, Hitachi
& probably others. Can be very confusing....

73 Zeno
LFOD !

Oh yeah, I knew orange drops have a fail safe that actually works or they merely short.

So the 800-860 caps can vary in value? I got out my other one and both are marked 22-7504-01, *but* have different codes above that. Both start with a 2 with a circle around it and 715PC. One follows that with 7817 and the other 8239.

[Findm-Keepm]

Originally Posted by Jon A.

So the 800-860 caps can vary in value? I got out my other one and both are marked 22-7504-01, *but* have different codes above that. Both start with a 2 with a circle around it and 715PC. One follows that with 7817 and the other 8239.

Circle deuce is Sprague (their EIA code is 2....), 715P is the dielectric, c=custom foil, and the 22-7504-01 is the zenith part number. Last 4=EIA date code, beginning with the year, 78 an 82, last two are the week number...

715PC later became 716P dielectric, for pulse applications. 716P are all 800V, 1000V, 1200, or 1600V caps....