UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players

Notices

Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc.

Reply
 
Thread Tools
Old 4th Jul 2020, 5:43 am   #21
ricard
Octode
 
ricard's Avatar
 
Join Date: Mar 2006
Location: Lund, Sweden
Posts: 1,455
Default Re: 1960 green magic eye

Quote:
Originally Posted by DMcMahon View Post
Have never seen a red band on a EM84, would be interesting to see a photo, am so used to seeing the overlap on the Grundigs.
One of the most common machines using this feature is the Philips EL3541; unfortunately, it seems hard to find images of the EM84 itself in record mode, here are some youtube videos which sortof gives one the idea:

Close up of the EM84 itself, unfortunately in play mode (albeit through the plastic window in the stop button of the machine):

https://youtu.be/7TV41Ph-mec?t=34

Operating (unfortunately, a low resolution video so it's hard to see what is going on):

https://youtu.be/hK334pq3nIQ?t=285

This one is in play mode, but one can clearly see the red band around the valve:

https://youtu.be/7TV41Ph-mec?t=43
ricard is offline   Reply With Quote
Old 4th Jul 2020, 11:01 am   #22
DMcMahon
Octode
 
DMcMahon's Avatar
 
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 1,474
Default Re: 1960 green magic eye

Thank you Ricard, all clear now. One of my old Grundigs had a yellow band in the middle which I guess was home user applied.

David
DMcMahon is offline   Reply With Quote
Old 4th Jul 2020, 11:02 am   #23
DMcMahon
Octode
 
DMcMahon's Avatar
 
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 1,474
Default Re: 1960 green magic eye

Quote:
Originally Posted by Chris55000 View Post
Hi!

The Robuk RK3/RK4 range of machines fit a 100k resistor between the target–anode pin 6 and the h t. supply lead – the Robuks tended to use a higher value of h.t. than was customary in most such machines, the Robuks I came across had a smoothed h.t. of 275–280V.

(None of the Robuk Service Data I came across gave any component–values, valve types, operating–voltages, etc., on it)

Chris Williams
I have heard the name Robuk before but until now have never seen any, they look interesting.

David
DMcMahon is offline   Reply With Quote
Old 5th Jul 2020, 9:58 pm   #24
rambo1152
Octode
 
rambo1152's Avatar
 
Join Date: May 2010
Location: Manchester, UK.
Posts: 1,904
Default Re: 1960 green magic eye

"Sharpie" permanent markers are available in a wide range of colours, and work well as colour filters on glass and clear plastics. Acetone , IPA or meths will clean it off should you need to.
__________________
--
Graham.
G3ZVT
rambo1152 is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 10:33 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright ©2002 - 2020, Paul Stenning.