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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. |
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15th Jan 2022, 11:03 pm | #1 |
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Philips EL 3541 Pause Lever Threaded End Function
When the Pause key is a pressed down a long metal lever/rod moves to the right and various things are actuated.
The right hand end of the rod is threaded and when Pause is pressed down the threaded section moves further into the right hand side compartment. Does anybody know the reason why the end of the lever is threaded, should there be something screwed onto it ? David |
15th Jan 2022, 11:16 pm | #2 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
You could get a cable operated foot-switch that operated the lever for use as a dictation machine whilst typing.
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16th Jan 2022, 9:03 am | #3 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
David, is there a break in the casting that I've highlighted? If so, would the screwed thread push the casting rather than go past it if it was complete?
Picture to follow, broadband problem!
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16th Jan 2022, 9:04 am | #4 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
Picture...
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16th Jan 2022, 9:51 am | #5 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
It's a U shaped part of the die cast chassis casting on which the outer end of the cable rests and the rod is pulled by the inner cable fitting that has a threaded insert.
I think the cable type is called a 'Bowden Cable' and similar to brake cables on a bicycle. |
16th Jan 2022, 10:39 am | #6 | |
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Re: Philips EL 3541 Pause Lever Threaded End Function
Quote:
Proper dictation machines were available but very much more expensive of course.
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16th Jan 2022, 10:42 am | #7 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
That's exactly what it was, just a bowden cable operated by a foot-lever. Purely mechanical. Very crude but it worked.
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16th Jan 2022, 10:44 am | #8 | |
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Re: Philips EL 3541 Pause Lever Threaded End Function
Quote:
This very minute I have also read about it in the EL 3541 Operating Instructions manual, which includes a small drawing showing it connected. The foot switch is listed as EL 3984/15. David |
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16th Jan 2022, 10:46 am | #9 | |
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Re: Philips EL 3541 Pause Lever Threaded End Function
Quote:
David |
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16th Jan 2022, 12:11 pm | #10 | ||
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Re: Philips EL 3541 Pause Lever Threaded End Function
Quote:
Hope that makes sense...
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16th Jan 2022, 12:47 pm | #11 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
I have got a 3553 and it also has the pause rod on it.
Getting the cable these days would be so difficult that it might be easier to make up a radio controlled servo to operate it. There was a lot of goo to clean up on it. Both the clutches and the belts had turned. |
17th Jan 2022, 12:11 am | #12 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
Think I have been lucky with this one, looks pretty good condition and belts look good, not sure about the clutches, yet to power it up.
David |
17th Jan 2022, 12:12 am | #13 | |||
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Re: Philips EL 3541 Pause Lever Threaded End Function
Quote:
David |
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23rd Jan 2022, 11:49 pm | #14 |
Octode
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Re: Philips EL 3541 Pause Lever Threaded End Function
Several Philips machines of the period had this remote control facility. I've seen it on the 1962 EL3547 as well. It was probably very cheap to implement, as all that was needed was the extension of a rod that was already necessary in the mechanical design.
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24th Jan 2022, 11:05 am | #15 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
If I had a spare solenoid, I'd convert that to an electronic stop! Some Philips units had foil end stop too, does this model? I know they skipped it the N4307/4308 successors.
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26th Jan 2022, 12:03 am | #16 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
From a quick look at the schematic and the unit it looks like the EL 3541 does not have end of tape foil detection.
David |
27th Jan 2022, 12:58 am | #17 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
Yep, it doesn't, although it's larger brother the EL3542 (and related siblings) does.
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27th Jan 2022, 5:26 am | #18 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
In a lot of machines (all of them?), the foil-triggered autostop solenoid simply acts like the stop (not pause) key and releases the other keys. It will not restart the machine when you de-energise it.
The pause control of course lifts the pinch roller and brakes the takeup spool. Releasing it will restart the tape. Bowden cables are not hard to get, for bicycles if nothing else. I would have thought making the end fitting to go into the tape recorder was a fairly simple turning job. Does anyone have a photo of that end of the thing? |
27th Jan 2022, 11:36 pm | #19 |
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Re: Philips EL 3541 Pause Lever Threaded End Function
Sketch from the EL 3541 Operating instructions.
David |