D-type, RS, JK, T, or waterproof?
in [Design]
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From: Rich Grise on Google groups on 22 Apr 2010 17:48 On Apr 21, 4:57 pm, Jim Thompson <To-Email-Use-The-Envelope-I...(a)On-My- Web-Site.com> wrote: > On Wed, 21 Apr 2010 19:31:50 -0400, PeterD <pet...(a)hipson.net> wrote: > >On Wed, 21 Apr 2010 21:13:55 +0100, Adam Funk <a24...(a)yahoo.com> > >wrote: > > >>glen herrmannsfeldt wrote: > > >>> And when was it that the beach wear started to be called flip-flops? > > >>> I haven't yet tried to explain to my daughter that when I was > >>> her age that flip-flops were electronic circuits. > > >AFAIK, flip-flops were named in the mid-60s... But I'm sure someone > >older will remember that as even earlier! > > Weren't 12AX7 flip-flops called "flip-flops"? > Were there 12AX7 flipflops? I remember them being variable-mu high- quality audio amps; the 12AU7 was for RF, and the 12AT7 was the switch. In the 1960's, those foam rubber sandalish things were called "shower shoes." ;-) Cheers! Rich
From: James Silverton on 22 Apr 2010 17:49 John wrote on Thu, 22 Apr 2010 16:26:43 -0500: >> On Wed, 21 Apr 2010 21:13:55 +0100, Adam Funk <a24061(a)yahoo.com> >> wrote: >> >>> glen herrmannsfeldt wrote: >>> >>>> And when was it that the beach wear started to be called >>>> flip-flops? >>>> >>>> I haven't yet tried to explain to my daughter that when I >>>> was her age that flip-flops were electronic circuits. >>> >> AFAIK, flip-flops were named in the mid-60s... But I'm sure >> someone older will remember that as even earlier! > --- > http://en.wikipedia.org/wiki/Flip-flop_(electronics) I read about "flip-flops" in the 50s before my school actually acquired its first computer. Did they not call them "bi-stable circuits"? I seem to remember that the circuits described used vacuum tubes or, as we called them in Britain, "valves". I was very enthusiastic about using a computer in my research but had to wait until 1958 when I went to Cornell. The first two computers that I used were an IBM 650 and a Burroughs 220 and they both used tubes. -- James Silverton Potomac, Maryland Email, with obvious alterations: not.jim.silverton.at.verizon.not
From: Tim Williams on 22 Apr 2010 18:16 "Rich Grise on Google groups" <richardgrise(a)yahoo.com> wrote in message news:d0969576-ae7c-4986-8a94-c5f01fa45a78(a)y38g2000prb.googlegroups.com... > Were there 12AX7 flipflops? I remember them being variable-mu high- > quality audio amps; > the 12AU7 was for RF, and the 12AT7 was the switch. Nothing variable-mu was ever audio quality (e.g. 6BA6, only found in tuned RF/IF amps), the reason should be obvious. 12AX7 was high quality (and sharp cutoff) for audio, AU for low gain audio, RF and general purpose apps (AX, AU and 6AU6 were the 2N3904s of their day), and AT for RF (not very good at audio). Both AX and AU were used in computers (and organs). I have a few 12AX7 "Computor" tubes laying around. Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms
From: krw on 22 Apr 2010 19:37 On Thu, 22 Apr 2010 20:03:00 +0100, Jonathan Bromley <spam(a)oxfordbromley.plus.com> wrote: >On Wed, 21 Apr 2010 19:33:37 -0500, "krw(a)att.bizzzzzzzzzzzz" ><krw(a)att.bizzzzzzzzzzzz> wrote: > >>On Wed, 21 Apr 2010 16:57:23 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: >> >>>On Wed, 21 Apr 2010 19:31:50 -0400, PeterD <peter2(a)hipson.net> wrote: >>> >>>>On Wed, 21 Apr 2010 21:13:55 +0100, Adam Funk <a24061(a)yahoo.com> >>>>wrote: >>>> >>>>>glen herrmannsfeldt wrote: >>>>> >>>>>> And when was it that the beach wear started to be called flip-flops? >>>>>> >>>>>> I haven't yet tried to explain to my daughter that when I was >>>>>> her age that flip-flops were electronic circuits. >>>>> >>>> >>>>AFAIK, flip-flops were named in the mid-60s... But I'm sure someone >>>>older will remember that as even earlier! >>> >>>Weren't 12AX7 flip-flops called "flip-flops"? >> >>I thought they were called "multivibrators (bistable)". > >C'mon, let's hear it for the Eccles-Jordan relay! s/relay/trigger/
From: keithw86 on 23 Apr 2010 08:57
On Apr 22, 11:07 pm, whit3rd <whit...(a)gmail.com> wrote: > On Apr 21, 1:13 pm, Adam Funk <a24...(a)yahoo.com> wrote: > > > > I haven't yet tried to explain to my daughter that when I was > > > her age that flip-flops were electronic circuits. > > and that the output is a Q (queue) and is thus compatible with > a holding pen... Of course the knot Q on the other side. |