Rules of thumb for power transformer current rating - derivation?
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From: pimpom on 20 Jan 2010 13:31 Michael A. Terrell wrote: > pimpom wrote: >> >> I saw a copy each of RDH 4th Ed and RCA Receiving Tube Manual >> in >> good condition with a pavement bookseller when I visited >> Mumbai >> quite some time ago (I'm in India and it was still called >> Bombay >> then). They caught my eye and the seller asked only the >> equivalent of USD1 and 50 cents respectively for them. I was >> tempted but I already had a heavy luggage and copies of both >> at >> home. Besides, that was before we had internet here and I had >> no >> idea how valuable they had become. $107 at eBay. Wow. >> >> Not getting those two books is among my regrets in life. I >> would >> probably give them away to a deserving person rather than sell >> them at exhorbitant prices. When I visited Mumbai more >> recently, >> I went to the same location, solely to look for those two and >> similar books, but no luck. > > > You can download those and other old electronics books for > free, if > you have a good internet connection: > <http://www.pmillett.com/technical_books_online.htm> I found that site some time last year while looking for something else. It even has an older edition of my first book on electronics - Audels Radiomans Guide. I found that one too on a pavement "bookshop". That one was in New Delhi. My connection is fairly OK. It's 2 Mbps and gives me 200 KB/s or better with a fast site. My best continuous d/l was a 4.14GB Knoppix LiveDVD in a single 5.5 hour session - an average of 220KB/s. (Yes, I *know* that some people enjoy several times that speed, but then there are others still struggling with dial-up). Any idea where I can d/l a late 60s or 70s edition of RCA Transistor Manual? The 1968 edition was among my earlier books but I lost it. I'd like to keep at least a pdf version, more for sentimental reasons than for any practical purpose.
From: Hammy on 20 Jan 2010 17:47 On Tue, 19 Jan 2010 17:19:21 -0500, Bitrex <bitrex(a)earthlink.net> wrote: >Thanks for the reference, I'll have to look at the RDH to see if it has >the material I'm looking for. I've always meant to get a hardcopy of >the book but 4th editions seem to go for stupid money on Ebay. I >imagine the PDF version is legal if the last publication date of the RDH >was before 1963 and the copyright on it was never renewed - it would >then be in the public domain. Both Agilent and Onsemi have good refrence material on PSU capacitive input filtering in their handbooks. Agilents http://www.ieeta.pt/~alex/docs/ApplicationNotes/DC%20Power%20Supply%20Handbook.pdf Heres Onsemis you want the linear and switching one http://www.onsemi.com/PowerSolutions/supportDoc.do?type=manuals
From: Bitrex on 20 Jan 2010 19:25 Hammy wrote: > On Tue, 19 Jan 2010 17:19:21 -0500, Bitrex <bitrex(a)earthlink.net> > wrote: > > >> Thanks for the reference, I'll have to look at the RDH to see if it has >> the material I'm looking for. I've always meant to get a hardcopy of >> the book but 4th editions seem to go for stupid money on Ebay. I >> imagine the PDF version is legal if the last publication date of the RDH >> was before 1963 and the copyright on it was never renewed - it would >> then be in the public domain. > > Both Agilent and Onsemi have good refrence material on PSU capacitive > input filtering in their handbooks. > > Agilents > > http://www.ieeta.pt/~alex/docs/ApplicationNotes/DC%20Power%20Supply%20Handbook.pdf > > Heres Onsemis you want the linear and switching one > > http://www.onsemi.com/PowerSolutions/supportDoc.do?type=manuals Those links are great, thank you!
From: ehsjr on 21 Jan 2010 00:11 Michael A. Terrell wrote: > pimpom wrote: > >>I saw a copy each of RDH 4th Ed and RCA Receiving Tube Manual in >>good condition with a pavement bookseller when I visited Mumbai >>quite some time ago (I'm in India and it was still called Bombay >>then). They caught my eye and the seller asked only the >>equivalent of USD1 and 50 cents respectively for them. I was >>tempted but I already had a heavy luggage and copies of both at >>home. Besides, that was before we had internet here and I had no >>idea how valuable they had become. $107 at eBay. Wow. >> >>Not getting those two books is among my regrets in life. I would >>probably give them away to a deserving person rather than sell >>them at exhorbitant prices. When I visited Mumbai more recently, >>I went to the same location, solely to look for those two and >>similar books, but no luck. > > > > You can download those and other old electronics books for free, if > you have a good internet connection: > <http://www.pmillett.com/technical_books_online.htm> > > > > Nice link! Ed
From: JosephKK on 22 Jan 2010 19:04
On Thu, 21 Jan 2010 00:01:02 +0530, "pimpom" <pimpom(a)invalid.invalid> wrote: >Michael A. Terrell wrote: >> pimpom wrote: >>> >>> I saw a copy each of RDH 4th Ed and RCA Receiving Tube Manual >>> in >>> good condition with a pavement bookseller when I visited >>> Mumbai >>> quite some time ago (I'm in India and it was still called >>> Bombay >>> then). They caught my eye and the seller asked only the >>> equivalent of USD1 and 50 cents respectively for them. I was >>> tempted but I already had a heavy luggage and copies of both >>> at >>> home. Besides, that was before we had internet here and I had >>> no >>> idea how valuable they had become. $107 at eBay. Wow. >>> >>> Not getting those two books is among my regrets in life. I >>> would >>> probably give them away to a deserving person rather than sell >>> them at exhorbitant prices. When I visited Mumbai more >>> recently, >>> I went to the same location, solely to look for those two and >>> similar books, but no luck. >> >> >> You can download those and other old electronics books for >> free, if >> you have a good internet connection: >> <http://www.pmillett.com/technical_books_online.htm> > >I found that site some time last year while looking for something >else. It even has an older edition of my first book on >electronics - Audels Radiomans Guide. I found that one too on a >pavement "bookshop". That one was in New Delhi. > >My connection is fairly OK. It's 2 Mbps and gives me 200 KB/s or >better with a fast site. My best continuous d/l was a 4.14GB >Knoppix LiveDVD in a single 5.5 hour session - an average of >220KB/s. (Yes, I *know* that some people enjoy several times that >speed, but then there are others still struggling with dial-up). > >Any idea where I can d/l a late 60s or 70s edition of RCA >Transistor Manual? The 1968 edition was among my earlier books >but I lost it. I'd like to keep at least a pdf version, more for >sentimental reasons than for any practical purpose. > The 1964 (7th edition) seems to be the best of the lot, and strangely one of the hardest to get. I have my original (rather beat up) physical copy. Maybe it is time to recheck with pmillett. |