9v battery terminal blanks?
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From: Ron Johnson on 17 Dec 2008 10:57 Dave Plowman (News) wrote: > In article <WY_1l.9317$UI2.6904(a)bignews6.bellsouth.net>, > jakdedert <jakdedert(a)bellsouth.net> wrote: >> To be honest, I don't use them for anything. My comments referred to >> alkalines used in wireless mics and other sound equipment. I save the >> used batteries in the manner suggested above. 9v's are expensive. >> While I wouldn't use them again professionally, we change them at almost >> every opportunity, since the expense is trivial compared to a dead mic >> during a show or presentation. > > Surely the client effectively pays for them? > > But if you're using decent quality batteries and equipment, the life > should be pretty consistent. With mine, it's 9 hours so I change at 8. If > I were using them for an all day presentation where they could only be > changed at say the lunch break, good rechargeables *might* be worth it. > Assuming your mics have an SMPS that can work on the lower voltage. > > But as I said earlier, 'pro' batteries bought by the box already come with > a clip on protector. Or do in the UK. And are cheaper per unit than buying > retail - unless you're willing to use no name stuff. At the moment I'm > using Energiser. ProCells are well discounted and often two boxes for the price of one at CPC in Preston. My last batch of PP3`s worked out around 80p each. Ron(UK)
From: jakdedert on 17 Dec 2008 12:33 Dave Plowman (News) wrote: > In article <WY_1l.9317$UI2.6904(a)bignews6.bellsouth.net>, > jakdedert <jakdedert(a)bellsouth.net> wrote: >> To be honest, I don't use them for anything. My comments referred to >> alkalines used in wireless mics and other sound equipment. I save the >> used batteries in the manner suggested above. 9v's are expensive. >> While I wouldn't use them again professionally, we change them at almost >> every opportunity, since the expense is trivial compared to a dead mic >> during a show or presentation. > > Surely the client effectively pays for them? When I say they're expensive, I'm speaking as a consumer. A card of two name-brand 9v's might be as much as $8 in a convenience store. That's a lot to pay for a backup battery in an alarm clock (the usual destination for my used cells), or a toddlers toy. Servicable cells are a perk of the job. I never buy them, either way (unless jobs with 9v's haven't come my way lately). Professionally, the client pays. Personally, I get free batteries. Either way the cost (to me) is trivial. > > But if you're using decent quality batteries and equipment, the life > should be pretty consistent. With mine, it's 9 hours so I change at 8. If > I were using them for an all day presentation where they could only be > changed at say the lunch break, good rechargeables *might* be worth it. > Assuming your mics have an SMPS that can work on the lower voltage. > The breaks don't always come at 8 hours. So, as you say, at lunch I'd change them, depending on the projected balance of the presentation. I'd also watch the reciever battery indicators like a hawk if they started to get low. I've been known to sneak up and change them on the fly. > But as I said earlier, 'pro' batteries bought by the box already come with > a clip on protector. Or do in the UK. And are cheaper per unit than buying > retail - unless you're willing to use no name stuff. At the moment I'm > using Energiser. > I've never bught (my clients haven't, actually) anything but Procells. I don't--and I don't allow anyone to--put the protectors back on the cells, or put them back in a used box. In the box--or protector on--means 'new battery' to me. Too much trouble to keep track during the heat of battle. If the stagehands or anyone else want the used cells, they need to get them out of my sight. I don't have time to check (or recharge) used batteries. I do check the mic's indicator whenever I change out the cells, though. I've never gotten a bad Procell; but there's a first time for everything. jak
From: Lostgallifreyan on 17 Dec 2008 12:54 jakdedert <jakdedert(a)bellsouth.net> wrote in news:zFa2l.9015$M01.8839(a)bignews3.bellsouth.net: > I don't have time to check (or recharge) used batteries. No-one's time should be that important unless they're saving a life or something. Time these devices were fitted with lithium ion batteries. Changing out sets of those occurs less because the energy density is good, there;s no 'memory effect' or other reason not to top up on demand, the cost can be low enough to compete with Procells, and changing them is as fast, or faster, given no fiddly pop-cap connector to mess with. And you top up your batteries at night in a charger and in the morning you have lots of new batteries. Their energy density is good enough that you'll likely get through a day or more of the demands a microphone makes, so if time really IS si desperately im,piortant that you think you can't find enough to charge a battery, think again. It will save you more than it costs. The only serious obstacle is the possible lack of 9V PP3 shaped lithium ion types. I don't think I've seen any yet. But a decent mic could use a DC-DC converter and run off one or two standard CR123's just fine, and for a lot longer too. The use of space for chemical reaction is far better in large cells than groups of small ones.
From: Ron Johnson on 17 Dec 2008 13:20 jakdedert wrote: I've never > gotten a bad Procell; but there's a first time for everything. I have! several times. PP3`s suffering sudden infant death - I always let radio mikes run for at least 15 minutes before a show where I can. I`ve never had a faulty AA, but as you say there`s always a first time. and I never ever use rechargables in radio packs. ROn(UK)
From: jakdedert on 17 Dec 2008 13:44
Ron Johnson wrote: > jakdedert wrote: > I've never >> gotten a bad Procell; but there's a first time for everything. > > I have! several times. PP3`s suffering sudden infant death - I always > let radio mikes run for at least 15 minutes before a show where I can. > I`ve never had a faulty AA, but as you say there`s always a first time. > and I never ever use rechargables in radio packs. > > ROn(UK) As i just said in another post, most mics these days use AA's. Last tour I had 11 presentation systems, each with four RF receivers; and each receiver had a lav pack and a handheld mic...presenter's choice. That's a lot of batteries (two per). Additionally, we had a general session (the 'main tent') with a dozen RF mics. I never got a bad battery, but I didn't have time to monitor each mic for 15 minutes, either. Usually either I (or my designated crew) checked batteries on each major break and replaced if below full scale on the mic battery indicator. All that said, I did have to shepherd eight walkie-talkies that all used rechargeables. That was trouble enough.... jak |