|
|
Anyone recognise this diagram?
"Jim Lesurf" wrote in message ... In article , Woody wrote: I have put a copy at http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file) Can anyone recogise this and say what it is? Well it clearly a reel to reel (probably) quarter track tape recorder with built-in amplifers. However the type of diagram is quite specific in that it has a component map at the top, and a quick bit of Googling of diagrams of all of the well known German manufacturers suggests it might be Uher. Ah! That may be an interesting clue. Thanks. I don't recall ever seeing any Uher kit or diagrams. And - so far as I recall - no Uher items in the anechoic chamber. However there could easily have been some in the past which were discarded before I took over the chamber. The sheet has part of one corner torn off. I have been wondering if it initially had one or more attached sheets which gave more info. e.g. What we see looks like a tape-deck based system. But doesn't seem to have an oscillator for bias/erasure. So maybe there were more diagrams and/or sheets which actually identified the unit. Jim In the mid 1970's, Uher made a number of tape recorders, often used by reporters and journalists, including the COI. The model 1200 was a professional mains and battery mono recorder with a pilot tone synchroniser to film. The Uher 4200 was a popular stereo recorder. There were two table models SG520 and SG 560. Iain |
Anyone recognise this diagram?
Jim Lesurf writes:
http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file) Can anyone recogise this and say what it is? It's a Philips deck from the late 60s, but I'm not sure exactly which model. The diagram style matches the Philips N4404, N4405 and N4407: http://www.hifiengine.com/manual_lib...ps/n4404.shtml http://www.ebay.co.uk/itm/Philips-N4...-/111349431800 http://www.hifiengine.com/manual_lib...ps/n4407.shtml But none of those models have a regulated PSU. The N4408 does, and more to the point it has an identical layout of audio connectors to the one in the mystery diagram: http://www.hifiengine.com/manual_lib...ps/n4408.shtml However, hifiengine's (generic) schematic is still quite different from Jim's. So perhaps the mystery machine is an earlier/later variant of the N4408, or another contemporary Philips model? Thanks, -- Adam Sampson http://offog.org/ |
Anyone recognise this diagram?
In article ,
Adam Sampson wrote: Can anyone recogise this and say what it is? It's a Philips deck from the late 60s, but I'm not sure exactly which model. The diagram style matches the Philips N4404, N4405 and N4407: That would make more sense than Uher. I've got some maker's workshop manuals for Philips TVs dating from their first colour TV to the mid '90s, but the style is nothing like Jim's schematic. Which of course means nothing. ;-) -- *Horn broken. - Watch for finger. Dave Plowman London SW To e-mail, change noise into sound. |
Anyone recognise this diagram?
"Dave Plowman (News)" wrote in message ... In article , Adam Sampson wrote: Can anyone recogise this and say what it is? It's a Philips deck from the late 60s, but I'm not sure exactly which model. The diagram style matches the Philips N4404, N4405 and N4407: That would make more sense than Uher. I've got some maker's workshop manuals for Philips TVs dating from their first colour TV to the mid '90s, but the style is nothing like Jim's schematic. Which of course means nothing. ;-) -- Having been an employee of the Philips group for nearly 30 years whenever I bought any electronic item from the Staff Shop I always obtained a service manual at best or a circuit diagram at worst - Philips manuals were easily available to anyone through Combined Electronic Services (CES) a.k.a. the Philips Service Dept. The manuals I had were all in English and (AFAICR) never have the component map, but there again information changes between market versions so it may have been that German market handbooks did have the map. -- Woody harrogate3 at ntlworld dot com |
Anyone recognise this diagram?
A Philips manual I had for a vcr had horrible photos of the top of the
circuit board, not a lot of use for anything but locating fixing screws! Brian -- ----- - This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please! "Woody" wrote in message ... "Dave Plowman (News)" wrote in message ... In article , Adam Sampson wrote: Can anyone recogise this and say what it is? It's a Philips deck from the late 60s, but I'm not sure exactly which model. The diagram style matches the Philips N4404, N4405 and N4407: That would make more sense than Uher. I've got some maker's workshop manuals for Philips TVs dating from their first colour TV to the mid '90s, but the style is nothing like Jim's schematic. Which of course means nothing. ;-) -- Having been an employee of the Philips group for nearly 30 years whenever I bought any electronic item from the Staff Shop I always obtained a service manual at best or a circuit diagram at worst - Philips manuals were easily available to anyone through Combined Electronic Services (CES) a.k.a. the Philips Service Dept. The manuals I had were all in English and (AFAICR) never have the component map, but there again information changes between market versions so it may have been that German market handbooks did have the map. -- Woody harrogate3 at ntlworld dot com |
Anyone recognise this diagram?
In article , Woody
scribeth thus "Dave Plowman (News)" wrote in message ... In article , Adam Sampson wrote: Can anyone recogise this and say what it is? It's a Philips deck from the late 60s, but I'm not sure exactly which model. The diagram style matches the Philips N4404, N4405 and N4407: That would make more sense than Uher. I've got some maker's workshop manuals for Philips TVs dating from their first colour TV to the mid '90s, but the style is nothing like Jim's schematic. Which of course means nothing. ;-) -- Having been an employee of the Philips group for nearly 30 years whenever I bought any electronic item from the Staff Shop I always obtained a service manual at best or a circuit diagram at worst - Philips manuals were easily available to anyone through Combined Electronic Services (CES) a.k.a. the Philips Service Dept. The manuals I had were all in English and (AFAICR) never have the component map, but there again information changes between market versions so it may have been that German market handbooks did have the map. Deffo a three speed machine. That number 3103 etc on the bottom right corner sure looks a Phillips number never seen the word "execution" on a diagram before;!.. -- Tony Sayer |
Anyone recognise this diagram?
On Fri, 25 Nov 2016 15:27:46 +0000, Dave Plowman (News) wrote:
In article , Jim Lesurf wrote: I've been working though a folder of old Ferrograph documents, scanning them to put onto the ukhhsoc website. I came across a circuit diagram that doesn't look to me like it is of any Ferrograph item. Presumably mis-filed at some ancient time. I have put a copy at http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file) Can anyone recogise this and say what it is? Did Ferrograph ever use DIN connectors? Also can't say I can remember ever seeing a 5 pin DIN used as a headphone socket. Sounds like something Grundig would do. ;-) It's definitely a 3 speed (4.75, 9.5 and 19 cm/s speed switch) stereo tape recorder (not deck - it has loudspeaker amps) which seems to be labelled in German or possibly Dutch which, with the use of DIN sockets, strongly suggests Phillips or Grundig as being the culprit for this domestic abortion of reel to reel tape recording technology. It certainly has nothing whatsoever to do with Ferrograph, that's for sure! :-) -- Johnny B Good |
Anyone recognise this diagram?
On Sat, 26 Nov 2016 01:23:05 +0000, Dave Plowman (News) wrote:
In article , Graeme Wall wrote: On 25/11/2016 15:27, Dave Plowman (News) wrote: In article , Jim Lesurf wrote: I've been working though a folder of old Ferrograph documents, scanning them to put onto the ukhhsoc website. I came across a circuit diagram that doesn't look to me like it is of any Ferrograph item. Presumably mis-filed at some ancient time. I have put a copy at http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file) Can anyone recogise this and say what it is? Did Ferrograph ever use DIN connectors? Also can't say I can remember ever seeing a 5 pin DIN used as a headphone socket. Sounds like something Grundig would do. ;-) I remember my Dad had a Grundig TK40 and that used 5 pin DINs for all the connectors. DIN connectors were pretty common on most German stuff at one time. Odd given the German reputation (and rightly so) for engineering things well. Spawn of satan, DIN connectors. ;-) Yes they were! They may have gained some kudos if they'd thought to insist that pins 1 (and 4) were *only* ever designated as inputs and pins 3 (and 5) *only* as outputs so that the only legitimate 5 or 3 pin DIN connecting cables were wired as cross-over types but they overlooked this opportunity to enforce a commonsense standard that would have curtailed the profiteering opportunities in the interconnect marketplace, a feature that would have endeared this interconnect standard to the "Hi-Fi buying Public". The only advantage of the constant current sources into virtual earth sinks system was the ease with which you can mix the outputs from several sources into one virtual earth sink (and the capability to bridge stereo pairs to downmix to mono without inducing distortion in the source amplifiers), otherwise (discounting the stereo into mono feature) it makes more sense to use constant voltage sources feeding mid to high Z sinks as is more typically the case with the phono plug and socket alternative. -- Johnny B Good |
Anyone recognise this diagram?
On Sat, 26 Nov 2016 09:21:27 +0000, Jim Lesurf wrote:
In article , Woody wrote: I have put a copy at http://jcgl.orpheusweb.co.uk/temp/Unknown.jpeg (about 3MB file) Can anyone recogise this and say what it is? Well it clearly a reel to reel (probably) quarter track tape recorder with built-in amplifers. However the type of diagram is quite specific in that it has a component map at the top, and a quick bit of Googling of diagrams of all of the well known German manufacturers suggests it might be Uher. Ah! That may be an interesting clue. Thanks. I don't recall ever seeing any Uher kit or diagrams. And - so far as I recall - no Uher items in the anechoic chamber. However there could easily have been some in the past which were discarded before I took over the chamber. The sheet has part of one corner torn off. I have been wondering if it initially had one or more attached sheets which gave more info. e.g. What we see looks like a tape-deck based system. But doesn't seem to have an oscillator for bias/erasure. So maybe there were more diagrams and/or sheets which actually identified the unit. Near the middle of the diagram, C21/L201 and C121/L202 look suspiciously like link winding coupled bias traps with the link windings in parallel connected to what seems to be the bias/erase oscillator transistor emitter (TS201) driving the erase head windings (K2 and K102). It's quite obvious that this is a domestic tape recorder using K1 and K101 for both playback and record head functions. Whilst using the same head for both recording and playback functions reduces costs, it does compromise the performance in one or both of these seperate functions since you need a wide gapped lo-Z wound head optimised for recording and a narrow gapped Hi-Z wound head for best replay performance (being able to monitor the just recorded signal coming back from the tape *isn't* the primary consideration with a separate record and replay head setup, even though that happens to be a very welcome feature). What makes interpretation of the circuitry tricky is the logic behind the way the complex switching is labelled. There are tables on the LHS of the diagram that attempt to describe the cryptic labelling of the functions of each switch in the form of a puzzle worthy of the detective skills ascribed to the eponymous Mr Sherlock Holmes. I've no doubt, given enough motivation to do so, there's enough information coded into those tables for the dedicated sleuth to work it all out. Since I'm not in the least bit motivated, I'm not going to "burn up" any more of my sleuthing skills than I've already squandered other than to say it's safe to assume what the switches will do when analysing the circuitry from each possible assumed state of playback or recording circuit functioning (along with the compounding influences of speed and mode settings such as mono recording on tracks 1 or 4 or 2 and 3 and "duoplay"-presumably dubbing track 1 or 4 playback to track 3 or 2 recording whilst mixing in from a mic or line input source). In short, it does look rather like the whole of the tape recorder circuitry is actually laid out in that one diagram. The lack of a model number reference however, does suggest that this is one of many pages out of a workshop service manual. Unless you strike it lucky by this being seen by someone who actually used such a service manual, I doubt you'll be able to pin it down to better than a guess as to it being a Phillips or Grundig domestic 4 track tape recorder circuit diagram. -- Johnny B Good |
| All times are GMT. The time now is 08:45 PM. |
Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.0.0
Copyright ©2004-2006 AudioBanter.co.uk