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Thanks for this very good explanation. In addition to the points you made, I have read the oil fill was often complete, and hydrostatic force would test the integrety of the plastic. Shrinkage and

Does anyone have one of these lying around - it is a 14 pin socket (2 x 7 way) to flying leads with free sockets to connect to

BB capacitors were molded as well as the technology of the day would allow... That is not why they cracked. The problem is the plastic they used, like most plastics, shrinks slowly over time, and the

All spiral wound paper/mylar/film capacitors are polarized from a noise perspective. The outside foil wrap of the capacitor will be connected to one, or the other lead. Depending on which way you

After some investigation ... and with the levels from the manual, it would appear it is the YTF that is faulty ... the attenuator is fine, levels check perfectly ... I cannot imagine it is the relay,

Ken- You look to be replying to Guy but as the instigator of this thread I should advise that I had a couple of off-list replies with offers of a pdf of the 8756-3 Product Note so I’m all OK.

Typo Alert! Should have read: If V1 & V3 are out of balance, V2 & V4 will be also.

One thing to note is the symmetry of the circuit. If R30 is getting hot but R31 isn't, then that symmetry has been broken somewhere. I'd start by comparing tube socket voltages between V1 & V3 and V2

I have a good collection of fiber and fiber accessories that I would be willing to trade or volunteer to a good cause. Show me a picture of the connector or let me know what the manual says and I

Sprague "Bumble Bee" and "Black Beauty" condensers were molded improperly, and they will crack, especially the oil filled ones, and let in moisture. That seems to react with the oil and make it

Well, it's been a while since I've done anything with fiber, but I used to subscribe to Laser Focus World, Photonics Spectra, and Fiber Optic Products Digest magazines.? I think there was also a

Dear all can someone please guide me to illustration of the different Fibber optic connectors also the cheapest way to get an optical source as i want to test out an optical analyser I was

?? Who made those? Some early advertising for Sprague Black Beauty caps said they were plasticized paper. The main problem with these is some sort of production problem they had. I have dissected a

??? Black Cat or Black Beauty, never heard of Black Cat. Black Beauty was a trade name of Sprague, they are notorious. Modern polypropylene caps are about the best performing of the plastic caps,

Even the later plasticized-paper “Prokar” and “DiFilm” versions can cause trouble in some applications – they may not be leaky, but their Dielectric Absorption and Dissipation Factor are

The hex file created for PIC17C44 is identical to that for PIC17C42A – so can use them without even needing to change the code. Sent: 04 November 2021 13:40 To:

Hi; I sent an email to the vendor asking for photos of the product note which he has supplied and I have attached the photos. I don't know what has gone south but since he has responded to me I

ETs are Engineering Tools, that were specially built or modified for internal use like production testing, adjustment purposes or similar. Therefore, usually there is no official, public information

Thanks – yes a PIC17C44 should work OK if I re-assemble the code using pic17c44a.inc - may even work w/o reassembly David Sent: 04 November 2021 08:58 To:

ALL Sprague "Black Cat", "Black Beauty" and? color striped "Bumble Bee" condensers should be considered bad on sight. Unfortunately, they are common in older equipment of all makes and models. The