9v battery terminal blanks?

Start harvesting the snap-on battery cords from dead electronics. Cut the wires off short (preferably inside the vinyl housing a bit). Snap them on -- there you are!

Most of those break after a few operations.

You could take a dead battery apart and use the connector block from that after insulating. Usually far stronger than the wire ended connectors.

That would be my suggestion, you could insulate the terminal rivets with blobs of epoxy glue or with some makes of battery the blank plastic insert from the bottom could be superglued on for insulation.

You don't need much technical understanding to know that NiCd & NiMh batteries have a lower terminal voltage.

It`s not to do with the terminal voltage, it`s something to do with the batteries internal resistance. Wireless packs are designed for replacable batteries. The internal battery metering is calibrated for Alkalines.

Remember the OP was talking 9v (PP3) batteries here, You're asking for trouble using anything other than Procells or Energisers.

Ron

Designing anything for alkalines only in ths day and age is absurd.

P.S. rechargeables have LESS internal resistance. Try shorting a rechargeable and see how hot it gets.

Show us some of your designs, troll.

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There are two kinds of people on this earth: The crazy, and the insane. The first sign of insanity is denying that you're crazy.

BWAHAHAHAHAHAHA.......

Ow - my sides hurt!

I forgot: A frozen parrot on a stick doesn't count.

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There are two kinds of people on this earth: The crazy, and the insane. The first sign of insanity is denying that you're crazy.

In your opinion maybe. Professionals in the sound industry use quality replaceable batteries, they are reliable - reliability means _everything_ when a show (or your job) is at stake.

and see how hot it gets.

Try shorting a 9 volt Procell! stand well back tho...

Ron

"Ron(UK)" wrote in news: snipped-for-privacy@bt.com:

Lame. I keep hearing this silly excuse. This is consumer high-street shop level thinking. The whole audio industry is riddled with it. For decades dull black boxes have been shifted with the letters PRO on them, regardless of how tacky they are, never has an industry blown its trumpet so loudly.

Do they use alkalines in space? In oil drilling gear that has to go down deep in the earth and stand vibrations? In pacemakers? In aircraft black boxes? Ok, maybe they do, sometimes, but there are lot of battery technologies reached for when mission critical reliability is needed, and I bet most industries don't reach for alkalines. Oil wells reach for lithium thionyl chloride, for example. If long life primaries with extreme reliability are important to people who are so up themselves with their 'reputation' and their expensive hours that are worth SO many batteries, why not buy those?

Instead of clinging to one aging method that is highly polluting, use some imagination and explore what REAL professionals with mission critical requirements are up to. Compared to those, the industry that makes such a song and dance of putting microphones in front of delegates at conferences is like the hairdressers and telephone sanitisers that Douglas Adams whimsically crashlanded on some planet along with a captain with a penchant for bathtubs and rubber ducks. >:) While we need entertainment and communication to make life worth living, people used to get by till very recently without having to use so many mics to feel important or get themselves heard.

Get a grip. This thread has wound its way round this silly circle for too long, and I should never have got into it myself, but I have, and this is my parting shot. I'll read the flames if I have the patience, but I will try not to get further involved.

I admit to using a few alkalines at times, but either where laziness is more attractive than performance, or where nothing else fits yet. If I could change all to Li-ion or lithium thionyl chloride types, I would. Specifically, the only time I justify an alkaline is when I need a PP3 that is ready to use, between long periods of disuse. For anything else, I find another way.

rechargeable and see how hot it gets.

John W. measured something like 90A from a shorted rechargeable (NiCd, IIRC) 9V battery. Enough to cause a real explosion.

Best regards, Spehro Pefhany

rechargeable and see how hot it gets.

I used to have a badly damaged wireless mic that caught fire while in use. If it hadn't been in a thick leather case the user would have had third degree burns where the ni-cads failed. He got some first & second degree burns as it was. The inside of the leather case was soaked with the contents of the vented cells, which would have caused more damage. The brand & model information was burnt off, along with most of the circuitry. The man using it reportedly grabbed it from his chest & threw it across the room before it could do more damage. When they showed it to me they didn't know who made it, and the dealer they bought it from was out of business.

rechargeable and see how hot it gets.

Duracell quote PP3 9v internal resistance as 1.7ohm, which makes the Short circuit current 5.29 Amps - not nearly as much as a NiCd!

Err, we're talking radio mics here. And pro ones are in a different league to the low end stuff. They have to be rugged - and possible to fix if damaged.

That's a stupid comparison - you'd have to take all those needed with you. Plus the fact that 'space' has easy and constant access to a source of power - the sun. Unheard of in the UK. ;-)

They use PP3s there? Or AAs? AAAs?

Cost almost certainly doesn't matter there.

Any battery used in that will be a backup.

Their requirements are likely different. With radio mics you need a cost/performance/reliability compromise.

I can give a reason. Very high capacity (and cost) primary cells might be ok where you can log the usage. Unfortunately in the film etc world this isn't always possible - one person might be looking after dozens of the things. So fitting brand new ones with a reasonable life is simply more convenient - you change them all at natural break times. That might be once a day - or twice. With some, three times. Most give a life of at least 5 hours.

Thanks for showing you don't have any understanding of this industry.

Think I met you once in the form of a large middle aged lady. I was working on a live TV current affairs program. Went to clip a mic on her and she said 'I don't need that, I have a perfectly good voice'

It's as well to understand the problems in an individual industry before trying to apply fixes from another. TV is full of kids just out of college trying to do just that - and failing miserably. I've seen hundreds come and go...

One of the most important things with some RMs is size - if they have to be concealed on the body. Better batteries allow smaller units. But good RMs are extremely expensive and none will junk good ones just for this.

I would have told her that the audience was miles away, and her voice wouldn't carry that far. Then I would hint that I would have the Cyron operator put up a message that she had refused to use a microphone because 'I don't need that, I have a perfectly good voice' and see how fast she changed her mind.

I had one of the power supply boards in a RCA TK 46 studio camera start to fail while on air. I was in the process of rebuilding every board of that type and had just finished one so I slipped into the rear door of the studio & got that camera operator's attention. He used his intercom headset to inform the control room & director so I could repair the camera between shots. I had just finished when the preacher on camera called out to me to join him in singing some southern gospel, on live TV. I politely refused, because my singing voice is registered as a lethal weapon. :)

In an industry where possibly 40 or 50, radio packs may be used nightly on a single live show, do you really think they would use the more expensive solution of using replacable batteries without good reason if they could get away with using rechargables and saving money? One microphone failure on a West End or Broadway show could cost a lot of money and someone his or her job.

Ron(UK)

It could get the company blacklisted in the industry as well. I've seen contracts that specified the exact equipment to be used. If yo can't supply it, you can't have the contract. ANY deviation is breech of contract.

If you have Vista and the sidebar applet for currency, you can always see it, and you can always type a figure in and get the exchange value.

Not using what is available is part of what creates slog work, and is itself slog work, ready made.