- Callins capacitor? - 19 Updates
| "Peter W." <peterwieck33@gmail.com>: Dec 11 08:46AM -0800 https://nebula.wsimg.com/09077cfb0a4e48e0bbb958b44e95039b?AccessKeyId=1884AA24B5A4B33E3F2B&disposition=0&alloworigin=1 Anything legitimately carrying the Callins name is at least 36 years old. Peter Wieck Melrose Park, PA |
| jlarkin@highlandsniptechnology.com: Dec 11 08:55AM -0800 >What's so special about them? >What's a good substitute? >Danke, Is that a non-polar electrolytic? Looks like two regular caps potted. What use is a 300 uF non-polar 'lytic? -- John Larkin Highland Technology, Inc The best designs are necessarily accidental. |
| Tom Gardner <spamjunk@blueyonder.co.uk>: Dec 11 05:04PM >> Danke, > Is that a non-polar electrolytic? Looks like two regular caps potted. > What use is a 300 uF non-polar 'lytic? It relieves audiophools of their surplus cash? |
| "Peter W." <peterwieck33@gmail.com>: Dec 11 10:08AM -0800 > What use is a 300 uF non-polar 'lytic? Mostly speaker crossovers. https://www.parts-express.com/300uf-100v-electrolytic-non-polarized-crossover-capacitor--027-371 Peter Wieck Melrose Park, PA |
| Steve Wilson <spam@me.com>: Dec 11 06:34PM >>Danke, > Is that a non-polar electrolytic? Looks like two regular caps potted. > What use is a 300 uF non-polar 'lytic? Motor Start Capacitor: NTE Electronics MSC125V270 Series MSC Motor Start AC Electrolytic Capacitor, Two 0.250" Quick Connect Terminals, 270-324 µF Capacitance, 110/125V CDN$ 15.92 FREE Delivery https://tinyurl.com/y5uwh2gz (https://www.amazon.ca/NTE-Electronics-MSC125V270-Electrolytic- Capacitance/dp/B007Z7MBJY/) -- The best designs occur in the theta state. - sw |
| "ohg...@gmail.com" <ohger1s@gmail.com>: Dec 11 10:53AM -0800 On Friday, December 11, 2020 at 11:46:56 AM UTC-5, Peter W. wrote: > Anything legitimately carrying the Callins name is at least 36 years old. > Peter Wieck > Melrose Park, PA The link OP provided shows what looks like a date code of 1975... |
| Phil Allison <pallison49@gmail.com>: Dec 11 01:01PM -0800 ohg...@gmail.com wrote: --------------------------------------- > The link OP provided shows what looks like a date code of 1975... ** Yep - no way should you buy even one. Being epoxy sealed makes no difference to the life span and no small electro lasts 40 years in storage. The dealer is a scam artist. Ebay is full of them. .... Phil |
| legg <legg@nospam.magma.ca>: Dec 11 07:23PM -0500 >What's so special about them? >What's a good substitute? >Danke, It's for restoration, rather than repair. RL |
| legg <legg@nospam.magma.ca>: Dec 11 07:31PM -0500 On Fri, 11 Dec 2020 08:55:19 -0800, jlarkin@highlandsniptechnology.com wrote: >>Danke, >Is that a non-polar electrolytic? Looks like two regular caps potted. >What use is a 300 uF non-polar 'lytic? Crossover network? I also saw something of a similar value in a Hafler preamp parts list, (and another smaller value) though I couldn't locate it on the schematis.. RL |
| John Larkin <jlarkin@highland_atwork_technology.com>: Dec 11 06:10PM -0800 >NTE Electronics MSC125V270 Series MSC Motor Start AC Electrolytic >Capacitor, Two 0.250" Quick Connect Terminals, 270-324 µF Capacitance, >110/125V But the Callins is 25 volts. |
| Steve Wilson <spam@me.com>: Dec 12 04:46AM >>CDN$ 15.92 FREE Delivery >>https://tinyurl.com/y5uwh2gz >>(https://www.amazon.ca/NTE-Electronics-MSC125V270-Electrolytic- Capacitance/dp/B007Z7MBJY/) > But the Callins is 25 volts. So? You didn't specify. You said "What use is a 300 uF non-polar 'lytic?" I imagine the Amazon cap could be used in audio applications. It may even have lower distortion. It is certainly intended to carry amps of current, and might even be used in high power aplications where the original collins would fail. The Amazon is brand new, where the collins has probably dried out by now. -- The best designs occur in the theta state. - sw |
| "Don" <g@crcomp.net>: Dec 12 04:49AM The earlier Callins link was only for reference to give people an idea of the price and physical characteristics. My questions actually pertain to a 100 μF 6 V Callins, which looks identical. It's used in a PAIA VCO module from the 1970s. The schematic's shown here: https://crcomp.net/paia/2720-2A.png C7 is the Callins. C6 is a plain vanilla electrolytic in a can. They both have a value of 100 μF. Although the simpleminded answer goes through everyone's mind first, it doesn't add up. Why pay more for a Callins back in the day? Why not buy twice as many electrolytics in cans to get a better price break? Or, if Callins was the cheap alternative back then, why pay more for electrolytics in cans? Perhaps the answer's as simple as the late John Simonton inheriting a pile of Callins. It's too late to ask John, but there's a PAIA forum, which may supply some answers, provided they process my registration. For the time being, the Callins will be substituted with a new electrolytic in a can. Danke, -- Don, KB7RPU There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night. |
| "Don" <g@crcomp.net>: Dec 12 07:56AM > the Callins is in an epoxy sealed container Interesting, but it doesn't answer my question: Why was the circuit designed to use a Callins in C7? Danke, -- Don, KB7RPU There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night. |
| John S <Sophi.2@invalid.org>: Dec 12 05:23AM -0600 On 12/11/2020 10:13 AM, Don wrote: > Greetings, > Why do Callins capacitors command such a high premium: So they could call themselves Rich Electronics. |
| Arie de Muynck <no.spam@no.spam.org>: Dec 12 01:25PM +0100 >> Danke, > Is that a non-polar electrolytic? Looks like two regular caps potted. > What use is a 300 uF non-polar 'lytic? The second picture (un)clearly shows + + + marking. |
| Tim Schwartz <tim@bristolnj.com>: Dec 12 08:07AM -0500 Don, If you look closely at the photo showing the cap on its side, you'll see a row of "+" marks, so this is a plain old polarized electrolytic capacitor, are are both C6 and C7 on the schematic diagram you provided. Perhaps one of them had been replaced over the units history. One is marked 100uf/10V and the other 100V/6V, so maybe it is what the purchasing department was able to get a deal on. My experience with those encapsulated Callins caps is that they are awful. I am NOT a fan of changing every electrolytic capacitor over 3 months old, which seems to be popular on internet forums, but I might make an exception for the Callins caps. A couple of years ago I got a lot of surplus caps, including dozens of Callins, all of which tested bad even after being give a while to form up on my trusty Heathkit IT-28 "capacitor checker". AR and KLH seemed to use quite a few of them in some models. Maybe they are charging so much because they are the only good ones left on the planet? Regards, Tim Schwartz Bristol Electronics On 12/11/2020 11:13 AM, Don wrote: |
| legg <legg@nospam.magma.ca>: Dec 12 09:12AM -0500 >For the time being, the Callins will be substituted with a new >electrolytic in a can. >Danke, Looks like a 6V part used to filter a 6.2V reference voltage. Hmmm. RL |
| legg <legg@nospam.magma.ca>: Dec 12 09:18AM -0500 >Interesting, but it doesn't answer my question: >Why was the circuit designed to use a Callins in C7? >Danke, If it was designed to use a Callins cap, then Callins would show up on the schematic and BOM. As it is, specifying a 6V electrolytic to filter a 6.2V reference is probably a mistake. RL |
| piglet <erichpwagner@hotmail.com>: Dec 12 03:36PM On 12/12/2020 4:49 am, Don wrote: > For the time being, the Callins will be substituted with a new > electrolytic in a can. > Danke, I have some similar epoxy sealed aluminum electrolytics from the mid 1970s made by Roederstein (now incorporated into Vishay). At the time they cost only a few percent more than metal can/elastomer seal capacitors. There is absolutely nothing special about the electrical characteristics needed of C6 and C7 in that unsavoury circuit and my guess is that the assemblers just randomly picked that brand. piglet |
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