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tabbypurr@gmail.com: Mar 28 03:53PM -0700 On Friday, 27 March 2020 21:56:47 UTC, Amanda Riphnykhazova wrote: > About 25 years ago I bought a baseballs hat with a solar panel on the top which drove a fan motor. It looked terrible and never moved enough air onto the user's forehead to actually do anything. After a while I got the impression that the panel was no longer giving out ANY power.   > I wonder if it might be possible to replace the 25 year old solar panel with a more modern one which actually works?   > Possibly a flexible panel which goes round the head a bit? What values should I try looking for? Or am I kidding myself that I might get this thing to work? Is that why no one has tried putting these things back into production?   Monocrystalline panels are more efficient than polycrystalline. Motor efficiency & power consumption also varies. You could spend on it if you want, but not wearing the hat would move more air.     NT

Amanda Riphnykhazova <licensedtoquill@gmail.com>: Mar 28 04:08PM -0700 > but not wearing the hat would move more air.   > NT   Yes, I suppose there's lateral stinking for you but I like the peak keeping the sun out of my eyes.   In the event that I do rebuild it, I should therefore address the general question of filling in that hole in the centre of the peak

Fox's Mercantile <jdangus@att.net>: Mar 28 09:47PM -0500 On 3/28/20 6:08 PM, Amanda Riphnykhazova wrote: > In the event that I do rebuild it   You might consider a battery holder instead of a solar cell. "Function over form."     -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com

Amanda Riphnykhazova <licensedtoquill@gmail.com>: Mar 29 07:22AM -0700 The battery cover is a better idea if the panel cant be replaced and properly hidden in some curve or other.   It is probably why there is a still imperfect newer version of my hat, but with two tiny solar panels on either side of the fan, which weighs the peak down so's you cant actually wear the thing!

Phil Allison <pallison49@gmail.com>: Mar 28 06:27PM -0700 Hi,   linear opto-isolators called VACTECs are common in instrument amplifiers and other items like pedals. Many versions exist and are not so easy to buy nor cheap.   IME the most common failure is on the LED inside, going weak or open circuit, however that is something easily and cheaply fixed with a new LED.   The black plastic casing of the VACTEC can be cracked open with a bench vice or a pair of multi-grips. The faulty LED is then removed and replaced.   The LEDs used are regular, red 3mm dia leaded types with red or clear plastic housings. All seem to be high efficiency types that light visibly with the low current from a DMM on diode test range.   Install the new LED, re-assemble and finish off with a tiny drop of Supa-Glue to seal in place. Takes only minutes and is a reliable fix.   Got an old MXR " Phase 100" running nicely again yesterday.   BTW: the units have been in ( and out) production since the 1977 with almost no design changes.   https://www.youtube.com/watch?v=2EkgNPIvAi0       .... Phil

Fox's Mercantile <jdangus@att.net>: Mar 28 09:46PM -0500 On 3/28/20 8:27 PM, Phil Allison wrote: > that is something easily and cheaply fixed with a new LED.   That's actually quite clever. Well done.   -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com

Phil Allison <pallison49@gmail.com>: Mar 28 08:01PM -0700 Fox's Mercantile wrote:   ------------------------------- > > that is something easily and cheaply fixed with a new LED.   > That's actually quite clever. > Well done.   ** My next trick will be to explain how to repair an octal ouptut tube ( KT88, 6550, 6L6GC etc) when damaged by an internal arcing from pin 3 to pin 2.   Involves a hot air (paint stripping) gun, a sharp pointed jewelers screwdriver and some more Supa-Glue.   But do I actually need to?       ..... Phil

M Philbrook <jamie_ka1lpa@charter.net>: Mar 29 08:56AM -0500 In article <738648ef-9004-42fc-a996-5fb9fdb8f9cd@googlegroups.com>, pallison49@gmail.com says...   > BTW: the units have been in ( and out) production since the 1977 with almost no design changes.   > https://www.youtube.com/watch?v=2EkgNPIvAi0   > .... Phil   I have a bag of 200 RED LED clear package I got recently from Amazon. They both work for emitter and detector althrough they are slighly narrow beamed.   In the sun I can get a full 1 Volt out of them with out issues.   These units have flat heads on them which is most likely the resson they are a bit picky on angle.

M Philbrook <jamie_ka1lpa@charter.net>: Mar 28 02:23PM -0500 In article <kd0o6ftt5mar96rir8j97me829jqqrdmk2@4ax.com>, etpm@whidbey.com says... > could make this motor draw so much current? > Thanks, > Eric   change the motor and also use a inverter drve to each machine for a softstart. The old moter most likely has a centrafugel switch and the bearings are most likely sloppy causing drag...   Also, I don't know what region you are in but if you have 50 Hz motors on 60 Hz supply things don't run as well. etc..

etpm@whidbey.com: Mar 28 01:31PM -0700 On Sat, 28 Mar 2020 14:23:15 -0500, M Philbrook >most likely sloppy causing drag...   > Also, I don't know what region you are in but if you have 50 Hz motors >on 60 Hz supply things don't run as well. etc.. I guess you didn't read what I wrote. The motor is a 3 phase, so no starting switch.

M Philbrook <jamie_ka1lpa@charter.net>: Mar 29 08:51AM -0500 In article <0ucv7f50eb8al5ads5t9dn0lnpds5hd1q9@4ax.com>, etpm@whidbey.com says... > >on 60 Hz supply things don't run as well. etc.. > I guess you didn't read what I wrote. The motor is a 3 phase, so no > starting switch.   ok, I missed that one sorry but still, you could have a bad 3 phase contactor with a weak leg on it. That causes poor startups too, long spin cycles. Actually, you may want to do a phase to phase voltage test after the contactor or switch that engages these legs to ensure all three legs are getting equal voltage.   You may have a case where you could only be getting enought to set the propper direction, this causes lots of drag and over currents on the legs that are working..   Many phase inverters shut down when seeing unbalnaced loads like this..

jjhudak4@gmail.com: Mar 28 05:22PM -0700 On Thursday, March 26, 2020 at 8:58:59 AM UTC-4, Miguel Giménez wrote:   > -- > Saludos > Miguel Giménez   how many sheets usage is on the pickup rollers? If over40K, good idea to replace them. HP makes maintenance kits for refirbing the units. Read the service manual and see what are recommended maintenance items in the paper feed mechanism. Oh, and ALWAYS keep the paper reams in a low humidity place and 'fan' the pages from both sides and top+bottom before the paper is placed in the tray. good luck j

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